java代ç : |
UserManager userManager; public void setUserManager(UserManager) { this.userManager = userManager; } public String create() { userManager.create(getUser()); } public String modify() { userManager.modify(modifyUser()) return "success"; } public String remove() { userManager.remove(getUser()) return "success"; } |
java代ç : |
<action name="user" class="com.caryo.user.actions.UserAction"> <external-ref name="userManager">userManager</external-ref> <result name="success" type="dispatcher">user.jsp</result> </action> |
java代ç : |
<bean id="userManager" class="com.caryo.user.DefaultUserManager"> <property name="userDAO"><ref local="userDAO"/></property> </bean> |
java代ç : |
UserManager userManager; public void setUserManager(UserManager) { this.userManager = userManager; } // userManager的获å–坿”‘Öœ¨ä¸€ä¸ªUserçš„æ ¹¾cÕd£°æ˜Žï¼Œå¦‚AbstractUserActionåQŒè¿™é‡Œé‡å¤äؓ了看得清楚些 public List getAllUsers() { userManager.getAllUsers(); } public List getOnlineUsers() { userManager.getOnlineUsers(); } |
java代ç : |
<action name="listuser" class="com.caryo.user.actions.ListUserAction"> <external-ref name="userManager">userManager</external-ref> <result name="success" type="dispatcher">listuser.jsp</result> </action> |
java代ç : |
<ww:iteraor value="allUsers"> userId: <ww:property value="id" /> userName: <ww:property value="name" /> </ww:iterator> <ww:iteraor value="onlineUsers"> userId: <ww:property value="id" /> userName: <ww:property value="name" /> </ww:iterator> |
java代ç : |
public class HibernateVehicleDAO extends CaryoHibernateObjectDAO implements VehicleDAO { Class vehicleClass; public Class getPersistentClass() { return vehicleClass != null ? vehicleClass : (vehicleClass = Vehicle.class); } public Vehicle getById(final long id) { return (Vehicle) getByClassId(id); } public List findAllGlobalVehicles() { return findNamedQuery("caryo.vehicle_findAllGlobalVehicles"); } } |
java代ç : |
<query name="caryo.vehicle_findAllGlobalVehicles"><![CDATA[ from Vehicle vehicle ]]></query> |
create table app_user(id number not null primary,firstname vchar(32),lastname vchar(32)); |
åQ?xml version="1.0"?åQ?BR>åQ?DOCTYPE hibernate-mapping PUBLIC    "-//Hibernate/Hibernate Mapping DTD//EN"    "http://hibernate.sourceforge.net/hibernate-mapping-2.0.dtd" åQ?BR>åQœhibernate-mapping package="com.jandar.model"åQ?BR>åQœclass name="User" table="APP_USER"åQ?BR> åQœid   column="ID"   name="id"   type="integer"  åQ?BR>   åQœgenerator class="assigned" /åQ?BR>  åQ?idåQ?BR>  åQœproperty    column="LASTNAME"    length="10"    name="lastname"    not-null="false"    type="string"  /åQ?BR>  åQœproperty    column="FIRSTNAME"    length="10"    name="firstname"    not-null="true"    type="string"  /åQ?BR> åQ?classåQ?BR>åQ?hibernate-mappingåQ? |
import java.io.Serializable; import org.apache.commons.lang.builder.EqualsBuilder; import org.apache.commons.lang.builder.HashCodeBuilder; import org.apache.commons.lang.builder.ToStringBuilder; import org.apache.commons.lang.builder.ToStringStyle; public class BaseObject implements Serializable {  public String toString() {   return ToStringBuilder.reflectionToString(this,   ToStringStyle.MULTI_LINE_STYLE);  }  public boolean equals(Object o) {   return EqualsBuilder.reflectionEquals(this, o);  }  public int hashCode() {   return HashCodeBuilder.reflectionHashCode(this);  } } public class User extends BaseObject {  private Long id;  private String firstName;  private String lastName;  /**  * @return Returns the id.  */  public Long getId() {   return id;  }  /**   * @param id The id to set.  */  public void setId(Long id) {   this.id = id;  }  /**  * @return Returns the firstName.  */  public String getFirstName() {   return firstName;  }  /**   * @param firstName The firstName to set.  */  public void setFirstName(String firstName) {   this.firstName = firstName;  }  /**  * @return Returns the lastName.  */  public String getLastName() {   return lastName;  }  /**  * @param lastName The lastName to set.  */  public void setLastName(String lastName) {   this.lastName = lastName;  } } |
package com.jandar.services.dao; public interface IDAO { } |
public interface IUserDAO extends DAO {  List getUsers();  User getUser(Integer userid);  void saveUser(User user);  void removeUser(Integer id); } |
import java.util.List; import org.apache.commons.logging.Log; import org.apache.commons.logging.LogFactory; import org.springframework.orm.hibernate.support.HibernateDaoSupport; import com.jandar.model.User; import com.jandar.service.dao.IUserDAO; public class UserDaoHibernate extends HibernateDaoSupport implements IUserDAO {  private Log log=LogFactory.getLog(UserDaoHibernate.class);  /* åQˆéž JavadocåQ?BR> * @see com.jandar.dao.IUserDAO#getUsers()  */  public List getUsers() {   return getHibernateTemplate().find("from User");  }  /* åQˆéž JavadocåQ?BR> * @see com.jandar.dao.IUserDAO#getUser(java.lang.Long)  */  public User getUser(Integer id) {   // TODO è‡ªåŠ¨ç”Ÿæˆæ–ÒŽ³•å˜æ ¹   return (User) getHibernateTemplate().get(User.class,id);  }  /* åQˆéž JavadocåQ?BR> * @see com.jandar.dao.IUserDAO#saveUser(com.jandar.model.User)  */  public void saveUser(User user) {   log.debug("xxxxxxx");   System.out.println("yyyy");   getHibernateTemplate().saveOrUpdate(user);   if(log.isDebugEnabled())   {    log.debug("userId set to "+user.getId());   }  }  /* åQˆéž JavadocåQ?BR> * @see com.jandar.dao.IUserDAO#removeUser(java.lang.Long)  */  public void removeUser(Integer id) {   Object user=getHibernateTemplate().load(User.class,id);   getHibernateTemplate().delete(user);   if(log.isDebugEnabled()){    log.debug("del user "+id);   }  } } |
  é¢å‘å¯¹è±¡çš„å¼€å‘æ–¹æ³•是当今的主‹¹ï¼Œä½†æ˜¯åŒæ—¶æˆ‘们ä¸å¾—ä¸ä‹É用关¾pÕdž‹æ•°æ®åº“,所以在ä¼ä¸š¾U§åº”用开å‘的环境ä¸ï¼Œå¯¹è±¡ã€å…³¾pÈš„æ˜ å°„åQˆORMåQ‰æ˜¯ä¸€¿U耗时的工作。围¾l•对象关¾pÈš„æ˜ å°„å’ŒæŒä¹…æ•°æ®çš„讉K—®åQŒåœ¨Java领域ä¸å‘展è“væ¥äº†ä¸€äº›API和框æžÓž¼Œä¸‹é¢åˆ†åˆ«½Ž€å•介¾lã€?
  JDBCå¯ä»¥è¯´æ˜¯è®‰K—®æŒä¹…æ•°æ®å±‚æœ€åŽŸå§‹ã€æœ€ç›´æŽ¥çš„æ–¹æ³•。在ä¼ä¸š¾U§åº”用开å‘ä¸åQŒæˆ‘们å¯èƒ½ä‹É用DAOåQˆData Access ObjectåQ‰æ¨¡å¼æ¥æŠŠæ•°æ®è®¿é—®å°è£…è“væ¥ï¼Œç„¶åŽåœ¨å…¶å®ƒçš„层ä¸åŒä¸€è°ƒç”¨ã€‚è¿™¿Uæ–¹å¼çš„优点是è¿è¡Œæ•ˆçŽ‡æœ€é«˜ï¼Œ¾~ºç‚¹æ˜¯æŠŠDAO对象和SQLè¯è¨€ç´§å¯†è€¦åˆåœ¨ä¸€èµ·ä‹É得在大项目ä¸éš¾ä»¥¾l´æŠ¤ã€‚ä½†æ˜¯ä¸½Ž¡æ€Žä¹ˆè¯ß_¼Œä½¿ç”¨JDBCæ¥ç›´æŽ¥è®¿é—®æŒä¹…æ•°æ®å±‚是当今ä¼ä¸šçñ”应用开å‘ä¸ä½¿ç”¨æœ€òq¿æ³›çš„ã€?
  实体Bean是J2EEòq›_°ä¸ç”¨æ¥è¡¨½Cºå’Œè®‰K—®æŒä¹…æ•°æ®çš„æ–¹å¼ã€‚虽然实体Bean是一¿U方便快æïLš„æ–ÒŽ³•åQŒä½†æ˜¯åœ¨˜q行时我们需è¦é¢å¤–è´ä¹°EJB容器åQˆå½“ç„Óž¼Œå¦‚今也有å…费的EJB容器åQŒå¦‚JBOSSåQ‰ï¼Œòq¶ä¸”使用ä¸åŒçš„应用æœåС噍åQŒéœ€è¦é‡æ–îC¹¦å†™ä¸åŒçš„部çÖvæè¿°åQŒä‹É得在ä¸åŒåº”用æœåС噍䏋¿UÀL¤ä¼ä¸š¾U§åº”用会带æ¥ä¸€äº›å›°éš¾ã€?
  å¦å¤–åQŒåœ¨Java领域ä¸ï¼Œ˜q˜æœ‰ä¸€äº›è¡¨½CºæŒä¹…æ•°æ®çš„æ¡†æž¶åQŒæ¯”如JDOå’ŒOJBåQŒåœ¨˜q™é‡Œž®×ƒ¸è¯¦ç»†ä»‹ç»äº†ã€?
  Hibernate是一¿Uæ–°çš„ORMæ˜ å°„å·¥å…·åQŒå®ƒä¸ä»…æä¾›äº†ä»ŽJava¾cÕdˆ°æ•°æ®è¡¨ä¹‹é—´çš„æ˜ å°„åQŒä¹Ÿæä¾›äº†æ•°æ®æŸ¥è¯¢å’Œæ¢å¤æœºåˆ¶ã€‚相对于使用JDBCå’ŒSQLæ¥æ‰‹å·¥æ“作数æ®åº“åQŒä‹É用HibernateåQŒå¯ä»¥å¤§å¤§å‡ž®‘æ“作数æ®åº“的工作é‡ã€?
  Hibernateå¯ä»¥å’Œå¤š¿UWebæœåŠ¡å™¨æˆ–è€…åº”ç”¨æœåŠ¡å™¨è‰¯å¥½é›†æˆåQŒå¦‚今已¾l支æŒå‡ 乎所有的‹¹è¡Œçš„æ•°æ®åº“æœåŠ¡å™¨ï¼ˆè¾?6¿U)ã€?
ã€€ã€€ä¸‹é¢æˆ‘们æ¥ä»‹¾l怎么¾l“åˆHibernate2.0å’ŒApache Tomcat5.0在Web应用ä¸ä‹É用Hibernateã€?/P>
  é…ç½®
  1ã€ä¸‹è½½å®‰è£…TomcatåQŒåƈ且下载Hibernateçš„è¿è¡ŒçŽ¯å¢ƒï¼ˆä¸»è¦åŒ…å«ä¸€äº›JAR包)ã€?
  2ã€æŠŠè¦ä‹É用的数æ®åº“çš„JDBC驱动½E‹åºæ‹¯‚´åˆ?TOMCAT_HOME%\common\lib目录下。笔者ä‹É用的是MYSQLåQŒå¯¹åº”的驱动½E‹åºçš„JARåŒ…äØ“mm.mysql-2.0.4-bin.jarã€?
  3ã€åœ¨Tomcatçš„Webapps目录下新å»ÞZ¸€ä¸ªWeb应用åQŒåå—䨓hibernateã€?
  4ã€æŠŠHibernateæä¾›çš„hibernate2.jar和一些第三方的è¿è¡Œåº“拯‚´åˆ°hibernate\WEB\INF\lib目录下。(˜q™äº›½W¬ä¸‰æ–¹çš„˜q行库包å«åœ¨ä¸‹è²çš„Hibernate lib目录下)
  5ã€åœ¨%TOMCAT_HOME%\conf\server.xmlä¸Webåº”ç”¨å’Œæ•°æ®æºã€‚在server.xmlä¸åŠ å…¥ä»¥ä¸‹çš„é…ç½®æè¿°ã€?/P>
  例程1 é…ç½®web应用
 <Context path="/hibernate" docBase="hibernate" debug="0" reloadable="true" crossContext="true">
  <Resource name="jdbc/hibernate" auth="Container" type="javax.sql.DataSource"/>
<ResourceParams name="jdbc/hibernate">
<parameter>
<name>factory</name>
<value>org.apache.commons.dbcp.BasicDataSourceFactory</value>
</parameter>
<parameter>
<name>driverClassName</name>
<value>org.gjt.mm.mysql.Driver</value>
</parameter>
<parameter>
<name>url</name>
<value>jdbc:mysql:///test</value>
</parameter>
<parameter>
<name>username</name>
<value>root</value>
</parameter>
<parameter>
<name>password</name>
<value></value>
</parameter>
<parameter>
<name>maxActive</name>
<value>20</value>
</parameter>
<parameter>
<name>maxIdle</name>
<value>10</value>
</parameter>
<parameter>
<name>maxWait</name>
<value>-1</value>
</parameter>
  </ResourceParams>
 </Context>
  在这里,é…置了一个å为hibernateçš„Web应用åQŒåƈ且酾|®äº†ä¸€ä¸ªæ•°æ®æºåQŒæ•°æ®æºçš„JNDIå称为jdbc/hibernateã€‚æ‚¨éœ€è¦æ ¹æ®æƒ…况修æ”ÒŽ•°æ®æºçš„链接属性ã€?
  6ã€ä¸‹ä¸€æ¥å°±æ˜¯ä¹¦å†™Hibernate的酾|®æ˜q°ç¬¦ã€‚å¯ä»¥ä‹É用XML的酾|®æ˜qŽÍ¼Œä¹Ÿå¯ä»¥ä‹É用基于属性的é…ç½®æè¿°ã€‚在˜q™é‡Œä½¿ç”¨åŸÞZºŽXML的酾|®æ˜q°ã€‚在hibernate\WEB-INF\classes目录下新å»ÞZ¸€ä¸ªhibernate.cfg.xmlæ–‡äšg。然åŽåР入例½E?所½Cºçš„内容ã€?
<!DOCTYPE hibernate-configuration
PUBLIC "-//Hibernate/Hibernate Configuration DTD//EN"
"http://hibernate.sourceforge.net/hibernate-configuration-2.0.dtd">
<hibernate-configuration>
<session-factory>
<property name="connection.datasource">java:comp/env/jdbc/hibernate</property>
<property name="show_sql">false</property>
<property name="dialect">net.sf.hibernate.dialect.MySQLDialect</property>
<!-- Mapping files -->
</session-factory>
</hibernate-configuration>
  注æ„connection.datasource属性必™åÕd’Œserver.xmlä¸é…¾|®çš„æ•°æ®æºçš„å±žæ€§ä¸€æ —÷€‚å¦‚æžœä¸æ˜¯ä‹É用MYSQLåQŒé‚£ä¹ˆéœ€è¦æ›´æ”¹dialect属性ã€?
  到现在,é…置基本完æˆåQŒä¸‹é¢æˆ‘们æ¥å¼€å‘一个最½Ž€å•的应用ã€?
ã€€ã€€å¼€å‘æŒä¹…对象ã€ç¼–å†™æ˜ ž®„æ˜q?/STRONG>
  我们使用hibernateæ¥å°è£…一个简å•的数æ®è¡¨ã€‚这个表的åå—䨓CoursesåQŒå®ƒæœ‰ä¸¤ä¸ªå—ŒDµï¼Œä¸€ä¸ªæ˜¯IDåQŒå®ƒæ˜¯Courses表的主键åQ›å¦ä¸€ä¸ªæ˜¯nameåQŒè¡¨½CºCoursesçš„åå—。在数æ®åº“ä¸ä½¿ç”¨ä»¥ä¸‹çš„脚本æ¥åˆ›å¾˜q™ä¸ªè¡¨ï¼š
  create table Courses(CourseId varchar(32) not null, name varchar(32), constraint pk_Courses primary key (CourseId) );
  接下æ¥çš„ä»ÕdŠ¡ž®±æ˜¯ä¸ºCourses表书写æŒä¹…对象,如例½E?所½Cºã€?
  例程3 Coursesçš„æŒä¹…对象(Courses.javaåQ?/P>
package com.hellking.study.hibernate;
import java.util.Set;
/**
*在hibernateä¸ä»£è¡¨äº†Course表的¾c…R€?BR> */
public class Course
{
/**æ¯ä¸ªå±žæ€§å’Œè¡¨çš„一个嗌Dµå¯¹åº?*/
private String id;
private String name;
/**students表示courseä¸çš„å¦ç”ŸåQŒåœ¨åŽé¢æ‰ä¼šç”¨åˆ°åQŒæš‚时丽Ž?*/
private Set students;
/**属性的讉K—®æ–ÒŽ³•**/
public void setId(String string) {
id = string;
}
public String getId() {
return id;
}
public void setName(String name)
{
this.name=name;
}
public String getName()
{
return this.name;
}
public void setStudents(Set stud)
{
this.students=stud;
}
public Set getStudents()
{
return this.students;
}
}
  å¯ä»¥çœ‹å‡ºåQŒåœ¨Course¾cÖM¸ä¹ŸåŒ…å«äº†ä¸¤ä¸ªå±žæ€§ï¼Œidå’ŒnameåQŒå®ƒçš„属性和表Courses的嗌D‰|˜¯ä¸€ä¸€å¯¹åº”的,òq¶ä¸”¾cÕdž‹ä¸€è‡´ã€?
  书写好了æŒä¹…对象åQŒæŽ¥ä¸‹æ¥çš„ä“Q务就是书写对象ã€å…³¾pÀL˜ ž®„æ˜q°ã€‚在hibernate\WEB-INF\classes目录下新å»ÞZ¸€ä¸ªCourse.hbm.xmlæè¿°æ–‡äšgåQŒå†…容如例程4所½Cºã€?
  例程4 Course.hbm.xml
<?xml version="1.0"?>
<!DOCTYPE hibernate-mapping PUBLIC
"-//Hibernate/Hibernate Mapping DTD 2.0//EN"
"http://hibernate.sourceforge.net/hibernate-mapping-2.0.dtd">
<hibernate-mapping>
<class
name="com.hellking.study.hibernate.Course"
table="Courses"
dynamic-update="false"
>
<id
name="id"
column="CourseId"
type="string"
unsaved-value="any"
>
<generator class="assigned"/>
</id>
<property
name="name"
type="string"
update="true"
insert="true"
column="Name"
/>
</class>
</hibernate-mapping>
  在Course.hbm.xmlæ˜ å°„æ–‡äšgä¸ï¼ŒæŒ‡å®šäº†è¦æ˜ å°„çš„ç±»å’Œæ˜ ž®„的表,òq¶ä¸”指定了表的å„个嗌Dµå’ŒJava对象ä¸å„个嗌D늚„æ˜ å°„å…³ç³»åQŒæ¯”如Course对象ä¸çš„id属性对应了Courses表的courseIdå—æ®µã€?
  接下æ¥çš„ä»ÕdŠ¡ž®±æ˜¯åœ¨hibernate.cfg.xml䏿Œ‡å®šè¿™ä¸ªæ˜ ž®„å…³¾p…R€‚如下所½Cºï¼š
<session-factory>
�BR><!-- Mapping files -->
<mapping resource="Course.hbm.xml"/>
</session-factory>
  ¾~–写业务逻辑
  到æ¤åQŒæˆ‘们已¾lå°è£…了一个å为Courses的表åQŒåƈ且酾|®å®Œæˆã€‚接下æ¥çš„ä“Q务就是在Web应用开å‘ä¸ä½¿ç”¨å®ƒä»¬åQŒäؓ了演½Cºåœ¨Hibernateä¸å¯¹æ•°æ®åº“çš„ä¸åŒ¾cÕdž‹çš„æ“ä½œï¼Œæˆ‘ä»¬å¼€å‘çš„Web应用有以下的功能åQ?
ã€€ã€€å¢žåŠ ä¸€ä¸ªCourseåQ?
ã€€ã€€åˆ é™¤ä¸€ä¸ªCourseåQ?
  按照Courseçš„åå—进行模¾pŠæœç´¢ï¼›
  查看¾pÈ»Ÿä¸æ‰€æœ‰çš„Courseã€?
  虽然我们å¯ä»¥ç›´æŽ¥åœ¨JSPä¸ä‹É用hibernateåQŒä½†æ˜¯å¾€å¾€æˆ‘们ä¸è¿™æ øP¼Œè€Œæ˜¯æŠŠè¿™äº›ä¸šåŠ¡é€»è¾‘ž®è£…在JavaBeanä¸ï¼Œç„¶åŽåœ¨JSPä¸é€šè¿‡è°ƒç”¨JavaBean以访问Hibernatež®è£…的对象ã€?
  ç”׃ºŽè®‰K—®é€šè¿‡ä½¿ç”¨hibernate有一些共性的æ“作åQŒåœ¨˜q™é‡Œæˆ‘们把这些共性的æ“作ž®è£…在一个专门的¾cÖM¸åQŒè¿™æ ·å…¶å®ƒçš„¾cÕd¯ä»¥ç‘ô承它åQŒå¦‚例程5所½Cºã€?
  例程5 HibernateBase.java
package com.hellking.study.hibernate;
import net.sf.hibernate.*;
import net.sf.hibernate.cfg.*;
import java.util.*;
import java.io.IOException;
import java.io.PrintWriter;
public abstract class HibernateBase
{
protected SessionFactory sessionFactory;//会è¯å·¥åŽ‚åQŒç”¨äºŽåˆ›å»ÞZ¼šè¯?BR> protected Session session;//hibernate会è¯
protected Transaction transaction; //hiberante事务
public HibernateBase()throws HibernateException
{
this.initHibernate();
}
// 帮助æ–ÒŽ³•
protected void initHibernate()
throws HibernateException {
// 装è²é…ç½®åQŒæž„é€ SessionFactory对象
sessionFactory = new Configuration().configure().buildSessionFactory();
}
/**
*开始一个hibernate事务
*/
protected void beginTransaction()
throws HibernateException {
session = sessionFactory.openSession();
transaction = session.beginTransaction();
}
/**
*¾l“æŸä¸€ä¸ªhibernate事务ã€?BR> */
protected void endTransaction(boolean commit)
throws HibernateException {
if (commit) {
transaction.commit();
} else {
//如果是åªè¯Èš„æ“ä½œåQŒä¸éœ€è¦commit˜q™ä¸ªäº‹åŠ¡ã€?BR> transaction.rollback();
}
session.close();
}
}
  下颾~–写业务逻辑¾c»ï¼Œæ–°å¾ä¸€ä¸ªå为CourseBeançš„JavaBeanåQŒåƈ且CourseBean¾l§æ‰¿HibernateBase¾c»ï¼Œä»£ç 如例½E?所½Cºã€?
  例程6 CourseBean.java
package com.hellking.study.hibernate;
import net.sf.hibernate.*;
import net.sf.hibernate.cfg.*;
import java.util.*;
/**
*和course相关的业务逻辑
*/
public class CourseBean extends HibernateBase
{
public CourseBean()throws HibernateException
{
super();
}
/**
*å¢žåŠ ä¸€ä¸ªCourse
*/
public void addCourse(Course st)throws HibernateException
{
beginTransaction();
session.save(st);
endTransaction(true);
}
/**
*查询¾pÈ»Ÿä¸æ‰€æœ‰çš„CourseåQŒè¿”å›žçš„æ˜¯åŒ…å«æœ‰CourseæŒä¹…对象的Iteratorã€?BR> */
public Iterator getAllCourses()throws HibernateException
{
String queryString = "select courses from Course as courses";
beginTransaction();
Query query = session.createQuery(queryString);
Iterator it= query.iterate();
return it;
}
/**
*åˆ é™¤¾l™å®šIDçš„course
*/
public void deleteCourse(String id)throws HibernateException
{
beginTransaction();
Course course=(Course)session.load(Course.class,id);
session.delete(course);
endTransaction(true);
}
/**
*按courseçš„åå—进行模¾pŠæŸ¥æ‰¾ï¼Œ˜q”å›žçš„æ˜¯åŒ…å«æœ‰CourseæŒä¹…对象的Iteratorã€?BR> */
public Iterator getSomeCourse(String name)throws HibernateException
{
String queryString = "select c from Course as c where c.name like :name" ;
beginTransaction();
Query query = session.createQuery(queryString);
query.setString("name", "%"+name+"%");
Iterator it= query.iterate();
return it;
}
}
  在CourseBeanž®è£…äº?ä¸ªä¸šåŠ¡æ–¹æ³•ï¼Œä½ å¯ä»¥æ ¹æ®æƒ…å†µå¢žåŠ å…¶å®ƒçš„ä¸šåŠ¡æ–ÒŽ³•。在CourseBeanä¸ï¼Œé€šè¿‡Hibernateæ¥æ“作潜在的数æ®åº“资æºã€?
  è¦ä¿å˜Courseæ•°æ®åˆ°æ•°æ®åº“åQŒå¯ä»¥é€šè¿‡åQ?/P>
  session.save(Course);
  æ–ÒŽ³•æ¥ä¿å˜ï¼Œå®ƒç›¸å½“于使用在JDBC䏿‰§è¡Œä»¥ä¸‹è¯å¥ï¼š
  Connection con=�BR>  Statement stmt=con.createStatement();
  stmt.executeUpdate("insert into courses values('"+course.getId(),+"','"+course.getName()+"')");
  con.close();
  å¯ä»¥çœ‹å‡ºåQŒé€šè¿‡ä½¿ç”¨HibernateåQŒå¯ä»¥å¤§å¤§å‡ž®‘æ•°æ®è®¿é—®çš„夿‚度ã€?
  在JSPä¸è°ƒç”¨ä¸šåŠ¡é€»è¾‘
  æ·ÕdŠ æ•°æ®
  CourseBean˜q™ä¸ªä¸šåŠ¡å¯¹è±¡ž®è£…了和Hibernate的交互关¾p»ï¼Œä»Žè€Œä‹ÉJSPå’ŒHibernate关系的解藕。我们æ¥çœ‹æµ‹è¯•主™åµé¢çš„部分代ç ,如例½E?所½Cºã€?
  例程7 ‹¹‹è¯•Hibernateå¼€å‘的应用åQˆcourse.jspåQ?/P>
<%@ page import="java.sql.*,java.util.*" errorPage="error.jsp"%>
<jsp:useBean id="course" class="com.hellking.study.hibernate.Course" scope="page">
<jsp:setProperty name="course" property="*"/>
</jsp:useBean>
<jsp:useBean id="courseBusiness" class="com.hellking.study.hibernate.CourseBean" scope="page"/>
<html><body><center>
<%
try
{
if(course.getId().equals(null)||course.getId().equals(""));
else courseBusiness.addCourse(course);
%>
æˆåŠŸæ·ÕdŠ äº†CourseåQ?lt;br>
nameåQ?lt;%=course.getName()%>
Id:<%=course.getId()%>
<%
}
catch(Exception e)
{
}
%>
<hr>
<br>::å¢žåŠ ä¸€ä¸ªcourse::<br>
<form action="course.jsp" method="get" name="add">
id:<input type=text name="id"><br>
name:<input type=text name="name"><br>
<input type=submit value="submit"><br>
</form>
<hr>
::按åå—æ¨¡¾pŠæŸ¥æ‰?:<br>
<form action="queryCourse.jsp" method="get" name="queryByName">
name:<input type=text name="name"><br>
<input type=submit value="query"><br>
</form>
<hr>
::åˆ é™¤ä¸€ä¸ªCourse::<br>
<form action="deleteCourse.jsp" method="get" name="queryByName">
id:<input type=text name="id"><br>
<input type=submit value="delete"><br>
</form>
<hr>
<a href=viewAll.jsp>::查看所有Course::<a>
</body>
</html>
  首先通过一个值对象CourseåQˆè¿™ä¸ªç±»æ£å¥½æ˜¯Hibernate使用的æŒä¹…对象,˜q™é‡Œä½œäؓ值对象æ¥ä¼ 递数æ®ï¼‰æŽ¥æ”¶èŽ·å¾—çš„å‚æ•ŽÍ¼Œç„¶åŽCourseBeançš„addCourse(Course)æ–ÒŽ³•把数æ®ä¿å˜åˆ°æ•°æ®åº“。å¯ä»¥çœ‹å‡ºï¼Œé€šè¿‡ä½¿ç”¨HibernateåQŒæŠŠæ•°æ®ä»Žè¡¨å•䏿·ÕdŠ åˆ°æ•°æ®åº“éžå¸¸½Ž€å•ã€?
  查询
ã€€ã€€ä¸‹é¢æ¥çœ‹æ¨¡ç³ŠæŸ¥æ‰¾çš„JSP代ç åQŒå¦‚例程8所½Cºã€?/P>
  例程8 按åå—æ¨¡¾pŠæŸ¥æ‰¾Course
<%@ page import="java.sql.*,java.util.*,com.hellking.study.hibernate.Course" errorPage="error.jsp"%>
<jsp:useBean id="courseBusiness" class="com.hellking.study.hibernate.CourseBean" scope="page"/>
�BR><% try
{
Iterator it=courseBusiness.getSomeCourse((String)request.getParameter("name"));
while(it.hasNext())
{
Course temp=(Course)it.next();
out.println("<tr><td>"+temp.getId()+"</td>");
out.println("<td>"+temp.getName()+"</td></tr>");
}
}
catch(Exception e)
{
out.println(e.getMessage());
}
%>
�
  它实际上调用的是CourseBeançš„Iterator getSomeCourse(String name)æ–ÒŽ³•。我们æ¥å›žé¡¾ä¸€ä¸‹è¿™ä¸ªæ–¹æ³•ä¸çš„代ç :
  /**
*按courseçš„åå—进行模¾pŠæŸ¥æ‰?BR> */
public Iterator getSomeCourse(String name)throws HibernateException
{
String queryString = "select c from Course as c where c.name like :name" ;
beginTransaction();
Query query = session.createQuery(queryString);
query.setString("name", "%"+name+"%");
Iterator it= query.iterate();
return it;
}
  在查询å‰åQŒé¦–先调用beginTransactionæ–ÒŽ³•å¯åŠ¨æ–°çš„Hibernate事务åQŒç„¶åŽåˆ›å»ÞZ¸€ä¸ªQuery对象åQŒåœ¨åˆ›å¾˜q™ä¸ªå¯¹è±¡æ—Óž¼ŒåŒæ—¶æŒ‡å®šæŸ¥è¯¢çš„è¯å¥ã€?
  注æ„åQŒåœ¨æŸ¥è¯¢è¯å¥åQ?/P>
  select c from Course as c where c.name like :name"
  ä¸ï¼Œå®ƒè™½ç„¶å’Œæ™®é€šçš„SQLè¯å¥ç›æ€¼¼åQŒä½†æ˜¯ä¸åŒï¼Œåœ¨æ•°æ®åº“ä¸ï¼Œä½¿ç”¨çš„表的åå—æ˜¯CoursesåQŒè€Œåœ¨˜q™ä¸ªæŸ¥è¯¢è¯å¥ä¸ä‹É用的是CourseåQŒå®ƒå’ŒæŒä¹…对象的åå—一è‡ß_¼Œä¹Ÿå°±æ˜¯è¯´åQŒè¿™ä¸ªæŸ¥è¯¢çš„æ¦‚念是查询æŒä¹…å¯¹è±¡ï¼Œè€Œä¸æ˜¯æ•°æ®åº“的记录ã€?
  创å¾äº†æŸ¥è¯¢å¯¹è±¡QueryåŽï¼Œéœ€è¦è®¾¾|®æŸ¥è¯¢çš„傿•°åQŒå®ƒå’Œåœ¨JDBCä¸PreparedStatement对象ä¸è®¾¾|®å‚æ•°çš„æ–ÒŽ³•ç›æ€¼¼ã€‚通过"Iterator it= query.iterate()"è¯å¥æ¥æ‰§è¡ŒæŸ¥è¯¢ï¼Œòq¶ä¸”˜q”回一个Iterator对象。在˜q™é‡Œä½¿ç”¨äº†Hibernateæä¾›çš„æŸ¥è¯¢æœºåˆÓž¼Œä¸€èˆ¬çš„JDBC查询˜q”回的是ResultSet对象åQŒè€Œè¿™é‡Œè¿”回的是包å«äº†CourseBean对象的Iteratorã€?
ã€€ã€€è¦æŸ¥è¯¢ç³»¾lŸä¸æ‰€æœ‰çš„CourseåQŒä¹ŸåŒæ ·éžå¸¸½Ž€å•,å¯ä»¥é€šè¿‡ä¾‹ç¨‹9所½Cºçš„代ç 实现ã€?
  例程9 查询数æ®åº“䏿‰€æœ‰çš„Course
�BR><jsp:useBean id="courseBusiness" class="com.hellking.study.hibernate.CourseBean" scope="page"/>
�BR><% try
{
Iterator it=courseBusiness.getAllCourses();
while(it.hasNext())
{
Course temp=(Course)it.next();
out.println("<tr><td>"+temp.getId()+"</td>");
out.println("<td>"+temp.getName()+"</td></tr>");
}
}
catch(Exception e)
{
out.println(e.getMessage());
}
%>
�/P>
  实际上调用的是CourseBeançš„getAllCoursesæ–ÒŽ³•åQŒå®ƒå’ŒgetSomeCourseæ–ÒŽ³•æœºåˆ¶ä¸€æ øP¼Œž®×ƒ¸å†ä»‹¾l了ã€?
ã€€ã€€åˆ é™¤æ•°æ®
  在JSPä¸ï¼Œä½¿ç”¨ä»¥ä¸‹çš„ä»£ç æ¥æ‰§è¡Œåˆ 除æ“作ã€?/P>
  例程10 åˆ é™¤æ•°æ®åº“ä¸Courses表的记录
<jsp:useBean id="courseBusiness" class="com.hellking.study.hibernate.CourseBean" scope="page"/>
â€?BR>åˆ é™¤id为:<%=request.getParameter("id")%>çš„courseåQ?::<br>
<% try
{
courseBusiness.deleteCourse(request.getParameter("id"));
out.println("åˆ é™¤æˆåŠŸ");
}
catch(Exception e)
{
out.println("ä¸å˜åœ¨è¿™ä¸ªè®°å½?);
}
%>
  我们æ¥çœ‹CourseBean䏿‰§è¡Œåˆ 除æ“作的具体代ç åQ?/P>
  /**
*åˆ é™¤¾l™å®šIDçš„course
*/
public void deleteCourse(String id)throws HibernateException
{
beginTransaction();
Course course=(Course)session.load(Course.class,id);
session.delete(course);
endTransaction(true);
}
  在这个方法ä¸åQŒé¦–先开始一个事务,然åŽé€šè¿‡session.load(Course.class,id)æ–ÒŽ³•æ¥è£…载指定IDçš„æŒä¹…对象,接下æ¥é€šè¿‡"session.delete(course)"æ¥åˆ 除已¾l装载的courseåQŒåƈ且结æŸHibernate事务ã€?
  æ€È»“
ã€€ã€€ä¸‹é¢æ€È»“一下ä‹É用Hibernate的开å‘过½E‹ï¼š
  1ã€é…¾|®HibernateåQˆä¸€‹Æ¡å³å¯ï¼‰åQ?BR>  2ã€ç¡®å®šæ•°æ®è¡¨åQ?
  3ã€åˆ›å»ºæŒä¹…对象;
  4ã€ç¼–写对象和数æ®è¡¨çš„æ˜ å°„æè¿°åQ?
  5ã€ç¼–写和业务逻辑ã€?
  实际上,上é¢çš„过½E‹å’Œä½¿ç”¨EJB没有什么区别:在ä‹É用EJBæ—Óž¼Œé¦–先当然也是é…置环境åQŒåˆå§‹åŒ–æ•°æ®è¡¨ï¼›ç„¶åŽåˆ›å¾å®žä½“BeanåQˆå¯¹è±¡äºŽHibernateçš„æŒä¹…对象)åQ›æŽ¥ä¸‹æ¥¾~–写部çÖvæè¿°½W¦ï¼ˆejb-jar.xmlåQŒåŽ‚å•†ä¸“æœ‰çš„éƒ¨çÖvæè¿°åQ‰ï¼Œåœ¨è¿™äº›éƒ¨¾|²æ˜q°ç¬¦é‡Œï¼ŒæŒ‡å®šäº†EJB和数æ®è¡¨çš„æ˜ ž®„å…³¾p»ï¼Œå¦‚果多个实体Beanå˜åœ¨å…Œ™”关系åQŒéœ€è¦æ˜q°å®ƒä»¬ä¹‹é—´çš„关系åQŒè¿™äº›æ˜q°å¯¹åº”于Hibernate䏿Œä¹…对象的æè¿°åQŒå¦‚Course.hbm.xmlåQ›å¾€å¾€æˆ‘们òq¶ä¸åœ¨åº”用程åºä¸ç›´æŽ¥æ“作实体BeanåQŒè€Œæ˜¯é€šè¿‡ä¸šåŠ¡å¯¹è±¡åQˆå¦‚会è¯BeanåQ‰æ¥æ“作åQŒè¿™é‡Œçš„会è¯Beanå¯ä»¥½Ž€å•的和Hibernate䏿‰§è¡Œä¸šåŠ¡é€»è¾‘çš„JavaBeanå¯¹åº”ã€‚è¿™é‡Œåªæ˜¯ç®€å•çš„¾cÀL¯”åQŒä¸æ˜¯ç»å¯¹çš„åQŒæ¯”å¦‚æˆ‘ä»¬åŒæ ·å¯ä»¥åœ¨ä¼šè¯Beanä¸è®¿é—®HibernateæŒä¹…对象åQŒä¹Ÿž®±æ˜¯è¯´ä‹É用HibernateåQŒåŒæ ·å¯ä»¥æŠŠä¸šåŠ¡é€»è¾‘æ”‘Öœ¨ä¼šè¯Beanä¸ã€?
  通过本文的å¦ä¹ ï¼Œç›æ€¿¡è¯»è€…对Hibernateå·²ç»æœ‰äº†åˆæ¥çš„认识,òq¶ä¸”能够使用Hibernateå¼€å‘简å•的应用。在下一½‹‡ä¸åQŒæˆ‘们将å¦ä¹ 怎么使用Hibernateæ¥äØ“å¤æ‚的数æ®è¡¨˜q›è¡Œæ˜ å°„åQŒåƈ且维护它们之间的关系ã€?/P>
在酾|®jspå¼€å‘环境的˜q‡ç¨‹ä¸ä¼š¼„°åˆ°ä¸å°‘问题åQŒæ„Ÿè°¢ç½‘上的许多å‰è¾ˆçš„ç»éªŒæ€È»“åQŒä½œè€…cl41çš„JSP˜qžæŽ¥Mysqlæ•°æ®åº“攻略和作者Saulzyçš„MySQLå¦ä¹ ½W”è®°½{‰æ–‡ç« 对我æ¥è¯´ç®€ç›´æ˜¯é›ªä¸é€ç¢³åQŒäؓ了帮助象我一æ ïLš„åˆå¦è€…åœ¨æ¤æ€È»“了丞®‘作者的¾l验åQŒéžå¸¸æ„Ÿè°¢ä»–ä»¬çš„æ— ç§å¥‰çŒ®¾_„¡¥žåQŒä¹Ÿå¸Œæœ›æ›´å¤šçš„äh把这¿Uç²¾¼œžå‘扬光大,呵呵åQŒå†‹Æ¡å¯¹æ‰€å‚è€ƒæ–‡ç« çš„ä½œè€…è¡¨½Cºæœ€å´‡é«˜çš„æ•¬æ„ï¼
以下软äšg下貘qžæŽ¥åœ°å€æ— 法昄¡¤ºçš„è¯åQŒè¯·ç›´æŽ¥åˆ°å®˜æ–¹ç½‘站下载å³å¯ï¼
软äšg下è²
Mysql
下è²ç‰ˆæœ¬åQšmysql-4.1.13-win32.zip(Windows downloads)
http://dev.mysql.com/downloads/mysql/4.1.html
JDBC驱动
下è²ç‰ˆæœ¬åQšmysql-connector-java-3.1.10.zip
http://dev.mysql.com/downloads/connector/j/3.1.html
下è²j2sdk
下è²ç‰ˆæœ¬åQšjdk-1_5_0_04-windows-i586-p.exe
http://java.sun.com/j2se/1.5.0/download.jsp
下è²tomcat
下è²ç‰ˆæœ¬: jakarta-tomcat-5.5.9.exe
http://jakarta.apache.org/site/downloads/downloads_tomcat-5.cgi
安装,é…ç½®j2sdkåQ?/P>
执行j2sdk安装½E‹åºåQŒæŒ‰é»˜è®¤è®„¡½®˜q›è¡Œå®‰è£…åQŒä¹Ÿå¯è‡ªå®šä¹‰è·¯å¾„åQŒä½†éœ€ä¿®æ”¹ä¸‹é¢çš„é…¾|?/P>
é…ç½®j2sdk:
é…置环境å˜é‡:
我的电脑->属æ€?>高çñ”->环境å˜é‡->¾pÈ»Ÿå˜é‡ä¸æ·»åŠ ä»¥ä¸‹çŽ¯å¢ƒå˜é‡ï¼š
JAVA_HOME=C:\Program Files\Java\jdk1.5.0_04
CLASSPATH=%JAVA_HOME%\lib\dt.jar;%JAVA_HOME%\lib\tools.jar;
path=%JAVA_HOME%\bin;%SystemRoot%\system32;%SystemRoot%;%SystemRoot%\System32\Wbem
写一个简å•çš„java½E‹åºæ¥æµ‹è¯•J2SDK是å¦å·²å®‰è£…æˆåŠŸï¼š
public class hello
{
public static void main(String args[])
{
System.out.println("Hello");
}
}
ž®†ç¨‹åºä¿å˜äؓ文äšgå䨓hello.java的文件ã€?
打开命ä×oæç¤º½W¦çª—å£ï¼Œ˜q›å…¥åˆ°hello.java所在目录,键入下é¢çš„命ä»?
javac hello.java
java hello
æ¤æ—¶è‹¥æ‰“å°å‡ºæ¥hello则安装æˆåŠŸï¼Œè‹¥æ²¡æœ‰æ‰“å°å‡º˜q™å¥è¯ï¼Œä»”细‹‚€æŸ¥ä»¥ä¸Šé…¾|®æ˜¯å¦æ£¼‹®ã€?BR>注愾pÈ»Ÿæ–‡äšg多w€‰é¡¹ä¸åº”¼‹®å®šâ€œéšè—已知文件类型的扩展åâ€ä¸å‹ùN€‰ï¼ˆæˆ‘的电脑—工具—查看)
安装,é…ç½®tomcat
执行tomcat安装½E‹åºåQŒæŒ‰é»˜è®¤è®„¡½®˜q›è¡Œå®‰è£…åQŒä¹Ÿå¯è‡ªå®šä¹‰è·¯å¾„åQŒä½†éœ€ä¿®æ”¹ä¸‹é¢çš„é…¾|?/P>
我的电脑->属æ€?>高çñ”->环境å˜é‡->¾pÈ»Ÿå˜é‡ä¸æ·»åŠ ä»¥ä¸‹çŽ¯å¢ƒå˜é‡?BR>CATALINA_HOME=C:\Program Files\Apache Software Foundation\Tomcat 5.5
CATALINA_BASE=C:\Program Files\Apache Software Foundation\Tomcat 5.5
修改环境å˜é‡ä¸çš„classpathåQŒæŠŠtomat安装目录下的common\lib下的servlet-api.jaræ·ÕdŠ åˆ°classpathä¸åŽ»åQ?BR>修改åŽçš„classpath如下åQ?
classpath=%JAVA_HOME%\lib\dt.jar;%JAVA_HOME%\lib\tools.jar;C:\Program Files\Apache Software Foundation\Tomcat 5.5\common\lib\servlet-api.jar;
å¯åЍtomcatåQŒåœ¨IEä¸è®¿é—?A href="http://localhost:8080/">http://localhost:8080åQŒè‹¥çœ‹åˆ°tomcat的欢˜qŽé¡µé¢çš„è¯è¯´æ˜Žå®‰è£…æˆåŠŸã€?/P>
安装mysql
解压¾~©mysql-4.1.13-win32.zipåQŒè¿è¡Œsetup.exe
首先出现的是安装å‘导‹Æ¢è¿Žç•Œé¢,直接点击“Nextâ€?BR>¾l§ç®‹åQŒé€‰æ‹©å®‰è£…¾cÕdž‹,选择“自定义â€custom安装åQŒç„¶åŽç‚¹â€œNextâ€ä¸‹ä¸€æ¥ï¼Œå‡ºçŽ°è‡ªå®šä¹‰å®‰è£…ç•Œé?BR>选择安装路径åQšC:\MySQL Server 4.1(å¯è‡ªå®šä¹‰)
点“OKâ€è¿”回到自定义安装界é¢ï¼Œè·¯å¾„å·²æ”¹ä¸ø™®¾¾|®çš„路径
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点“Finishâ€å®Œæˆï¼Œæ•´ä¸ªMySQL的酾|®å®Œæˆï¼Œå‰©ä¸‹çš„就是用MySQL客户端连接MySQLæœåŠ¡å™¨ï¼Œç„¶åŽä½¿ç”¨äº†ã€?/P>
安装JDBC驱动åQ?BR>解压¾~©mysql-connector-java-3.1.10.zip
ž®†è¦ä½¿ç”¨çš„æ˜¯mysql-connector-java-3.1.10-bin-g.jarå’Œmysql-connector-java-3.1.10-bin.jar
é…ç½®
在C:\Program Files\Java目录下å¾ç«‹mysqlforjdbcå目录,˜q›å…¥è¯¥ç›®å½•å°†mysql-connector-java-3.1.10-bin.jar到该目录ä¸?BR>˜q›å…¥C:\Program Files\Java\jdk1.5.0_04\lib目录ž®†mysql-connector-java-3.1.10-bin-g.jar拯‚´åˆ°è¯¥ç›®å½•ä¸?BR>ç„¶åŽé…ç½®classpathåQŒè¿½åŠ?JAVA_HOME%\lib\mysql-connector-java-3.1.10-bin-g.jar;C:\Program Files\Java\mysqlforjdbc\mysql-connector-java-3.1.10-bin.jar;到该环境å˜é‡ä¸åŽ»
˜q½åР以åŽçŽ¯å¢ƒå˜é‡å¦‚下åQ?BR>CLASSPATH=%JAVA_HOME%\lib\dt.jar;%JAVA_HOME%\lib\tools.jar;C:\Program Files\Apache Software Foundation\Tomcat5.5\common\lib\servlet-api.jar;%JAVA_HOME%\lib\mysql-connector-java-3.1.10-bin-g.jar;C:\Program Files\Java\mysqlforjdbc\mysql-connector-java-3.1.10-bin.jar;
é…ç½®˜q™ä¸ªçš„目的是让java应用½E‹åºæ‰‘Öˆ°˜qžæŽ¥mysql的驱动.
查看òq¶å¯åЍMySQLæœåŠ¡
在Windows XP下安装完MySQLåŽï¼Œå®ƒå°±å·²ç»è‡ªåЍå¯åЍæœåŠ¡äº†ï¼Œòq¶ä¸”在开始èœå•䏿œ‰å…¶å®¢æˆ·ç«¯çš„å¿«æ·æ–¹å¼˜qžæŽ¥
å¯ä»¥é€šè¿‡Windowsçš„æœåŠ¡ç®¡ç†å™¨æŸ¥çœ‹ã€‚“开始â€ï¼â€œè¿è¡Œâ€ï¼Œè¾“入“services.mscâ€ï¼Œå›žèžRã€?BR>弹出Windowsçš„æœåŠ¡ç®¡ç†å™¨åQŒç„¶åŽå°±å¯ä»¥çœ‹è§æœåŠ¡åäØ“â€œmysqlâ€çš„æœåŠ¡™å¹äº†åQŒå…¶åŒ™¾¹æ ‡æ˜Žâ€œå·²å¯åЍâ€?BR>在开始èœå?所有程åº?MySQL-MySQL Server 4.1-MySQL Command Line Client用客æˆïL«¯çš„å¿«æäh–¹å¼è¿žæŽ?BR>输入安装是设¾|®çš„密ç å›_¯
æ•°æ®åº“的使用
Mysql安装完毕以åŽåQŒåœ¨å¼€å§‹èœå?所有程åº?MySQL-MySQL Server 4.1-MySQL Command Line Client用客æˆïL«¯çš„å¿«æäh–¹å¼è¿žæŽ?BR>输入安装时设¾|®çš„密ç
使用mysql的基本命ä»?在mysql命ä×o行编辑æ¯è¾“å…¥å®Œå‘½ä»¤åŽæœ€åŽä¸€å®šè¦æœ‰åˆ†å?
昄¡¤ºæ•°æ®åº“:show databases;
使用数æ®åº“:use æ•°æ®åº“ååQ?/P>
建库
在mysql里å¾ä¸€ä¸ªæ•°æ®åº“firståQŒä»¥åŠåœ¨æ•°æ®åº“里å»ÞZ¸€ä¸ªè¡¨about
命ä×oåQšcreate database first;
为数æ®åº“讄¡½®æƒé™åQˆç”¨æˆ·å’Œå¯†ç åQ?BR>命ä×oåQšgrant all privileges on first.* to test@localhost identified by â€?23456â€?
å½“ä½ æ‰§è¡Œå®Œè¿™ä¸ªå‘½ä»¤ä»¥åŽï¼Œåªè¦ä½ å†ä»¥ç”¨æˆ·ååQštest,密ç åQ?23456ç™Õd½•æ—¶ä½ ž®±åªå¯ä»¥å¯¹first˜q™ä¸ªæ•°æ®åº“æ“作,˜q™æ ·é¿å¼€ä½¿ç”¨root
输入命ä×oåQšuse first;
使用firstæ•°æ®åº“ï¼›
在first库ä¸å»ø™¡¨
命ä×oåQšcreate table about(id int(8) primary key,name varchar(10));
在表ä¸å‡å¦‚æ•°æ®ï¼š
命ä×oåQšinsert into about values('xyw1026','laojiang');
退å‡?BR>命ä×oåQšexit
JSP˜qžæŽ¥mysql
在C:\Program Files\Apache Software Foundation\Tomcat5.5\webapps目录下å¾ç«‹å目录myapp
˜q›å…¥C:\Program Files\Apache Software Foundation\Tomcat5.5\webapps\myapp目录ä¸?BR>用记事本¾~–写一个文件ä¿å˜äØ“first.jsp
代ç 如下åQ?BR><%@ page contentType="text/html;charset=gb2312"%>
<%@ page import="java.sql.*"%>
<html>
<body>
<%Class.forName("org.gjt.mm.mysql.Driver").newInstance();
String url ="jdbc:mysql://localhost/softforum?user=soft&password=soft1234&useUnicode=true&characterEncoding=8859_1"
//firstä¸ÞZ½ 的数æ®åº“å?
Connection conn= DriverManager.getConnection(url);
Statement stmt=conn.createStatement(ResultSet.TYPE_SCROLL_SENSITIVE,ResultSet.CONCUR_UPDATABLE);
String sql="select * from first";
ResultSet rs=stmt.executeQuery(sql);
while(rs.next()) {%>
您的½W¬ä¸€ä¸ªå—ŒDµå†…容䨓åQ?lt;%=rs.getString(1)%>
您的½W¬äºŒä¸ªå—ŒDµå†…容䨓åQ?lt;%=rs.getString(2)%>
<%}%>
<%out.print("æ•°æ®åº“æ“作æˆåŠŸï¼Œæå–œä½?);%>
<%rs.close();
stmt.close();
conn.close();
%>
</body>
</html>
在æµè§ˆå™¨ä¸è¾“入:
http://127.0.0.1:8080/myapp/first.jsp
若出玎ͼš
id|num
0 |laojiang
æ•°æ®åº“æ“作æˆåŠŸï¼Œæå–œä½?/P>
表示é…ç½®æˆåŠŸ
˜q›å…¥C:\Program Files\Apache Software Foundation\Tomcat5.5\webapps\myapp目录
在myapp目录下新å»ÞZ¸€ä¸ªç›®å½•WEB-INFåQŒæ³¨æ„,目录å称是区分大ž®å†™çš„ï¼›
在WEB-INF下用è®îCº‹æœ¬æ–°å»ÞZ¸€ä¸ªæ–‡ä»Óž¼Œå‘½å为web.xmlåQŒå†…容如下:
<?xml version="1.0" encoding="ISO-8859-1"?>
<!DOCTYPE web-app
PUBLIC "-//Sun Microsystems, Inc.//DTD Web Application 2.3//EN"
"
在myapp下用è®îCº‹æœ¬æ–°å»ÞZ¸€ä¸ªæµ‹è¯•çš„jsp™åµé¢åQŒæ–‡ä»¶å为index.jspåQŒæ–‡ä»¶å†…容如下:
<html><body><center>
Now time is: <%=new java.util.Date()%>
</center></body></html>
é‡å¯Tomcat
打开‹¹è§ˆå™¨ï¼Œè¾“å…¥http://localhost:8080/myapp/index.jsp
çœ‹åˆ°å½“å‰æ—‰™—´çš„è¯è¯´æ˜ŽæˆåŠŸå®‰è£…ã€?
建立自己的ServletåQ?
用记事本新å¾ä¸€ä¸ªservlet½E‹åºåQŒæ–‡ä»¶å为HelloWorld.javaåQŒæ–‡ä»¶å†…容如下:
import java.io.*;
import javax.servlet.*;
import javax.servlet.http.*;
public class HelloWorld extends HttpServlet
{
public void doGet(HttpServletRequest request,HttpServletResponse response)throws ServletException,IOException
{
response.setContentType("text/html");
PrintWriter out = response.getWriter();
out.println("<html><head><title>");
out.println("This is my first Servlet");
out.println("</title></head><body>");
out.println("<h1>Hello,World!</h1>");
out.println("</body></html>");
}
}
¾~–译
ž®†HelloWorld.java剪切到C:\Program Files\Apache Software Foundation\Tomcat5.5\common\classes目录ä¸?BR>命ä×o行方å¼ä¸‹è¾“å…¥åQ?
cd C:\Program Files\Apache Software Foundation\Tomcat5.5\common\classes
javac HelloWorld.java
用javac HelloWorld.javaæ¥ç¼–译这个文ä»Óž¼Œå¦‚æžœå‡ºçŽ°æ— æ³•import javax.servlet.*
则将C:\Program Files\Apache Software Foundation\Tomcat5.5\common\lib目录下的servlet-api.jaræ–‡äšg拯‚´òq¶æ·»åŠ åˆ°
C:\Program Files\Java\jre1.5.0_04\lib\ext目录ä¸åŽ»ž®±å¯ä»¥äº†
ç„¶åŽåœ¨C:\Program Files\Apache Software Foundation\Tomcat5.5\common\classes下会产生一个编译åŽçš„servletæ–‡äšgåQšHelloWorld.class
用记事本打开C:\Program Files\Apache Software Foundation\Tomcat5.5\webapps\ROOT\WEB-INF目录下的web.xml如下所½Cºï¼Œæ·ÕdŠ åŽçš„内容如下:
.
.
.
<!-- JSPC servlet mappings start -->
<servlet>
<servlet-name>org.apache.jsp.index_jsp</servlet-name>
<servlet-class>org.apache.jsp.index_jsp</servlet-class>
</servlet>
<servlet-mapping>
<servlet-name>org.apache.jsp.index_jsp</servlet-name>
<url-pattern>/index.jsp</url-pattern>
</servlet-mapping>
<servlet>
<servlet-name>HelloWorld</servlet-name>
<servlet-class>HelloWorld</servlet-class>
</servlet>
<servlet-mapping>
<servlet-name>HelloWorld</servlet-name>
<url-pattern>/servlet/HelloWorld</url-pattern>
</servlet-mapping>
<!-- JSPC servlet mappings end -->
</web-app>
˜q™æ®µè¯ä¸çš„servlet˜q™ä¸€ŒDµå£°æ˜Žäº†ä½ è¦è°ƒç”¨çš„ServletåQŒè€Œservlet-mapping则是ž®†å£°æ˜Žçš„servletâ€œæ˜ ž®„â€åˆ°/servlet/HelloWorld地å€ä¸?
å¯åЍTomcatåQŒå¯åЍæµè§ˆå™¨åQŒè¾“å…?A href="http://localhost:8080//servlet/HelloWorld">http://localhost:8080//servlet/HelloWorld 如果看到输出HelloWorldåQ就说明¾~–写的servletæˆåŠŸäº†ã€?
注æ„åQšä¿®æ”¹äº†web.xmlä»¥åŠæ–°åŠ äº†classåQŒéƒ½è¦é‡å¯Tomcat
也å¯ä»¥åœ¨è‡ªå·±åˆ›å¾çš„目录下‹¹‹è¯•如:
ž®†HelloWorld.class拯‚´åˆ°C:\Program Files\Apache Software Foundation\Tomcat5.5\webapps\myapp\WEB-INF\classes目录ä¸?BR>å…¶ä¸classes目录若没有就创å¾ä¸€ä¸?BR>用记事本打开C:\Program Files\Apache Software Foundation\Tomcat5.5\webapps\myapp\WEB-INF目录下的web.xml如下所½Cºï¼Œä¿®æ”¹åŽçš„内容如下:
.
.
.
<!-- JSPC servlet mappings start -->
<servlet>
<servlet-name>HelloWorld</servlet-name>
<servlet-class>HelloWorld</servlet-class>
</servlet>
<servlet-mapping>
<servlet-name>HelloWorld</servlet-name>
<url-pattern>/servlet/HelloWorld</url-pattern>
</servlet-mapping>
<!-- JSPC servlet mappings end -->
</web-app>
å¯åЍTomcatåQŒå¯åЍæµè§ˆå™¨åQŒè¾“å…?A href="http://localhost:8080/myapp/servlet/HelloWorld">http://localhost:8080/myapp/servlet/HelloWorld 如果看到输出HelloWorldåQ就说明¾~–写的servletæˆåŠŸäº†ã€?
注æ„åQšä¿®æ”¹äº†web.xmlä»¥åŠæ–°åŠ äº†classåQŒéƒ½è¦é‡å¯Tomcat
建立自己的javaBeanåQ?
用记事本新å¾ä¸€ä¸ªjava½E‹åºåQŒæ–‡ä»¶å为TestBean.javaåQŒæ–‡ä»¶å†…容如下:
package test;
public class TestBean{
private String name = null;
public TestBean(String strName_p){
this.name=strName_p;
}
public void setName(String strName_p){
this.name=strName_p;
}
public String getName(){
return this.name;
}
}
¾~–译
ž®†TestBean.java攑֜¨c:\test下,使用如下命ä×o¾~–译åQ?
C:\test>javac TestBean.java
ç„¶åŽåœ¨c:\Test下会产生一个编译åŽçš„beanæ–‡äšgåQšTestBean.class
ž®†TestBean.classæ–‡äšg剪切到C:\Program Files\Apache Software Foundation\Tomcat5.5\webapps\myapp\WEB-INF\classes\test目录下,
è‹¥æ— æŸäº›å目录则创å¾ä¸€ä¸?
æ–°å¾ä¸€ä¸ªTestBean.jspæ–‡äšgåQŒæ–‡ä»¶å†…容䨓åQ?
<%@ page import="test.TestBean" %>
<html><body><center>
<%
TestBean testBean=new TestBean("This is a test java bean.");
%>
Java bean name is: <%=testBean.getName()%>
</center></body></html>
é‡å¯TomcatåQŒå¯åЍæµè§ˆå™¨åQŒè¾“å…?A href="http://localhost:8080/myapp/TestBean.jsp">http://localhost:8080/myapp/TestBean.jsp 如果看到输出Java bean name is: This is a test java bean
ž®Þp¯´æ˜Žç¼–写的javaBeanæˆåŠŸäº†ã€?
åQˆç‰¹åˆ«æ³¨æ˜Žï¼šæœ¬æ–‡å†…容凿¥è‡ªäº’è”网åQ?/P>
webworkæ˜¯ä¸ªä¼˜ç§€çš„å¼€æºæ¡†æžÓž¼Œç‰¹åˆ«æ˜¯å…¶æ‹¦æˆªå™¨æœºåˆÓž¼Œæˆ‘认为是整个¾pÈ»Ÿæœ€å¤§çš„亮点åQŒå¯åœ¨å…¶ä¸Šé¢åšå¤§é‡æ–‡ç«?BR>我的开å‘çŽ¯å¢ƒäØ“Eclipse3.0.1+lomozåQŒæ•°æ®åº“我用的是MySQL4.0.12,当然åQŒä¹Ÿç”¨åˆ°äº†mysqlcc,æœåŠ¡å™¨æˆ‘ç”¨çš„æ˜¯tomcat4.0.3å’Œtomcat4.1
请先下è²webwork.,spring.,hibernateåQŒåƈ把JARæ–‡äšg攑ֈ°web-infçš„lib目录里é¢ã€‚åŒæ—Óž¼Œè¯·ä¸‹è½?A >http://unc.dl.sourceforge.net/sourceforge/aopalliance/aopalliance.zip åQŒå°†aopalliance.jar攑ֈ°lib目录里é¢ã€?BR>˜q˜æœ‰webwork2-spring.jaråQŒä»¥åŠmysql的驱动都è¦ä¸‹è½½åƈ攑ֈ°lib里é¢åQŒç¼ºä¸€ä¸å¯
ç„¶åŽæ˜¯é…¾|®log4jåQŒå¦‚果没有棼‹®é…¾|®logåQŒTOMCATž®†ä¸èƒ½æ£å¸¸å‘å¸ƒä½ çš„é¡¹ç›®ã€‚é…¾|®log4j很简å•,
在web-inf/classes下å¾ç«‹ä¸€ä¸ªlog4j.properties的文ä»Óž¼Œå†…容如下
log4j.rootLogger=INFO, A1 , R
log4j.appender.A1=org.apache.log4j.ConsoleAppender
log4j.appender.A1.layout=org.apache.log4j.PatternLayout
log4j.appender.A1.layout.ConversionPattern=%-d{yyyy-MM-dd HH:mm:ss} [%c]-[%p] %m%n
log4j.appender.R=org.apache.log4j.RollingFileAppender
log4j.appender.R.File=d:/Tomcat 4.1/webapps/demo/logs/log4j.log
log4j.appender.R.MaxFileSize=100KB
log4j.appender.R.MaxBackupIndex=1
log4j.appender.R.layout=org.apache.log4j.PatternLayout
log4j.appender.R.layout.ConversionPattern=%p %t %c - %m%n
å…¶ä¸log4j.appender.R.File˜q™ä¸€™å¹è¯·æŒ‰ç…§ä½ TOMCAT的安装佾|®è¿›è¡Œä¿®æ”¹ï¼Œå…³äºŽlog4j的详¾l†å†…容,推è大家看Hiltonçš„å¦ä¹ 笔è®îC»¥åŠIBM¾|‘ç«™ä¸Šçš„ç›¸å…³æ–‡ç« .
好了åQŒå¼€å§‹æˆ‘们的webwork之旅了。首先是é…ç½®web.xmlæ–‡äšg
<?xml version="1.0" ?>
<!DOCTYPE web-app PUBLIC "-//Sun Microsystems, Inc.//DTD Web Application 2.3//EN" "http://java.sun.com/dtd/web-app_2_3.dtd">
<!-- Copyright (c) 2002 by ObjectLearn. All Rights Reserved. -->
<web-app>
<listener>
<listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
</listener>
<listener>
<listener-class>com.atlassian.xwork.ext.ResolverSetupServletContextListener</listener-class>
</listener>
<servlet>
<servlet-name>webwork</servlet-name>
<servlet-class>com.opensymphony.webwork.dispatcher.ServletDispatcher</servlet-class>
</servlet>
<servlet-mapping>
<servlet-name>webwork</servlet-name>
<url-pattern>*.action</url-pattern>
</servlet-mapping>
<taglib>
<taglib-uri>webwork</taglib-uri>
<taglib-location>/WEB-INF/webwork.tld</taglib-location>
</taglib>
</web-app>
我们é…置了两个监å¬å™¨åQŒè¿˜æœ‰ä¸€ä¸ªservletåQŒè¿™ä¸ªservletè´Ÿè´£actionçš„è{å‘工作,关于action的详¾l†å·¥ä½œåŽŸç†ï¼Œå¤§å®¶å¯ä»¥å‚看xworkçš„æºä»£ç
在接下æ¥é…置之å‰åQŒæˆ‘惛_¤§æ¦‚说一下我惛_®žçŽ°çš„åŠŸèƒ½åQŒå°±æ˜¯ç®€å•的往mysqlçš„ä¸€ä¸ªè¡¨ä¸æ’入一些数æ?BR>首先我用Middlegen-Hibernateå’Œhibernate-extensionsåQˆæˆ‘没用eclipseçš„hibernateæ’äšgåQŒæˆ‘å–œæ¬¢ç”¨è¿™ä¸¤æ ·å·¥å…·æ¥ç”Ÿæˆ?IMG src="http://blog.csdn.net/Emoticons/tongue_smile.gif">åQ‰ç”Ÿæˆäº†è¡¨å¯¹åº”çš„hbm.xmlæ–‡äšg和两个JAVA¾c»ï¼Œè¡¨çš„å—æ®µæ˜?tablename,fieldname,chinesename", è¡¨åæ˜?BR>"systable",å…¶ä¸tablename,fieldnameåšåŒä¸»é”®åQŒè¿™æ øP¼Œç”Ÿæˆå‡ºæ¥çš„类应该是两个,一个PK主键¾cÕd’Œä¸È±»æœ¬èínåQŒæˆ‘æŠŠä»–ä»¬åŠ å…¥åˆ°äº†æˆ‘çš„é¡¹ç›®ä¸.
ç„¶åŽæˆ‘åšäº†ä¸€ä¸ªæŽ¥å£ç±»
package com.cz.struct;
/**
* @author tijichen
*
* TODO To change the template for this generated type comment go to
* Window - Preferences - Java - Code Style - Code Templates
*/
public interface SystableDAO {
public abstract void insert(Systable data);
}
ç„¶åŽæ˜¯å®žçŽ°ç±»
package com.cz.struct;
import net.sf.*;
import org.springframework.orm.hibernate.support.HibernateDaoSupport;
/**
* @author tijichen
*
* TODO To change the template for this generated type comment go to
* Window - Preferences - Java - Code Style - Code Templates
*/
public class SysTableDAOImp extends HibernateDaoSupport implements
SystableDAO{
public void insert(Systable data)
{
this.getHibernateTemplate().save(data);
}
}
ä¸ÞZ»€ä¹ˆè¦ç”¨æŽ¥å£ç±»åQŸå› 为spring会用到JAVA的动æ€ä»£ç†ï¼Œå…³äºŽ˜q™éƒ¨åˆ†ï¼Œå¤§å®¶å¯ä»¥çœ‹xiaxinçš„spring指å—
在insert æ–ÒŽ³•ä¸ï¼Œæˆ‘直接调用了springæä¾›çš„hibernateæ¨¡æ¿æ–ÒŽ³•åQŒçœŸæ˜¯æ–¹ä¾¿å‘€
ç„¶åŽæ˜?spring的酾|®äº†åQŒè¯·åœ¨web-lib/下å¾ç«‹applicationContext.xmlæ–‡äšgåQŒå†…容如ä¸?BR><?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE beans PUBLIC "-//SPRING//DTD BEAN//EN" "http://www.springframework.org/dtd/spring-beans.dtd">
<beans>
<bean id="dataSource"
class="org.springframework.jdbc.datasource.DriverManagerDataSource"
destroy-method="close">
<property name="driverClassName">
<value>org.gjt.mm.mysql.Driver</value>
</property>
<property name="url">
<value>jdbc:mysql://localhost/mystructs</value>
</property>
<property name="username">
<value>chenzhi</value>
</property>
<property name="password">
<value>1</value>
</property>
</bean>
<bean id="sessionFactory"
class="org.springframework.orm.hibernate.LocalSessionFactoryBean">
<property name="dataSource">
<ref local="dataSource" />
</property>
<property name="mappingResources">
<list>
<value>com\cz\struct\SysTable.hbm.xml</value>
</list>
</property>
<property name="hibernateProperties">
<props>
<prop key="hibernate.dialect">
net.sf.hibernate.dialect.MySQLDialect
</prop>
<prop key="hibernate.show_sql">
true
</prop>
</props>
</property>
</bean>
<bean id="transactionManager"
class="org.springframework.orm.hibernate.HibernateTransactionManager">
<property name="sessionFactory">
<ref local="sessionFactory" />
</property>
</bean>
<bean id="systableDAO" class="com.cz.struct.SysTableDAOImp">
<property name="sessionFactory">
<ref local="sessionFactory" />
</property>
</bean>
<bean id="systableDAOProxy"
class="org.springframework.transaction.interceptor.TransactionProxyFactoryBean">
<property name="transactionManager">
<ref bean="transactionManager" />
</property>
<property name="target">
<ref local="systableDAO" />
</property>
<property name="transactionAttributes">
<props>
<prop key="insert*">PROPAGATION_REQUIRED</prop>
<prop key="get*">PROPAGATION_REQUIRED,readOnly</prop>
<prop key="is*">PROPAGATION_REQUIRED,readOnly</prop>
</props>
</property>
</bean>
</beans>
在这个酾|®æ–‡ä»‰™‡Œé¢ï¼Œæˆ‘们讄¡½®äº†datasource\sessionfactory以åŠspring的动æ€ä»£ç†ï¼Œ˜q˜æœ‰hibernate所需è¦çš„XMLæ˜ å°„æ–‡äšg路径
ç„¶åŽæ˜¯é…¾|®xwork.xml
<!DOCTYPE xwork PUBLIC "-//OpenSymphony Group//XWork 1.0//EN" "http://www.opensymphony.com/xwork/xwork-1.0.dtd">
<xwork>
<include file="webwork-default.xml" />
<package name="default" extends="webwork-default"
externalReferenceResolver="com.atlassian.xwork.ext.SpringServletContextReferenceResolver">
<interceptors>
<interceptor name="reference-resolver"
class="com.opensymphony.xwork.interceptor.ExternalReferencesInterceptor" />
<interceptor-stack name="vxStack">
<interceptor-ref name="params" />
<interceptor-ref name="model-driven" />
<interceptor-ref name="reference-resolver" />
</interceptor-stack>
</interceptors>
<action name="Test" class="com.cz.struct.TestAction">
<external-ref name="systableDAO">systableDAOProxy</external-ref>
<result name="success" type="dispatcher">
<param name="location">/index.jsp</param>
</result>
<interceptor-ref name="vxStack" />
</action>
</package>
</xwork>
在酾|®actionçš„external-ref的时候我é‡åˆ°äº†ä¸€ä¸ªä¸å¤§ä¸ž®çš„玩笑åQŒä¸€èˆ¬ç¼–辑XML的时候我都是在editplus里颾~–辑çš?BR>åQŒæœ€å¼€å§‹æˆ‘写æˆ
<external-ref name="systableDAO">
systableDAOProxy
</external-ref>
¾l“æžœ¾pÈ»Ÿæç¤ºæ‰¾ä¸åˆ°å«systableDAOProxy˜q™ä¸ªåå—çš„beanåQŒç»“果一查,å‘现æ—è¾¹ä¸èƒ½åŠ ä¸Š½Iºæ ¼å’ŒtabåQŒå“Žã€‚。肯定是˜q”å›žä¸²çš„æ—¶å€™æ²¡åŠ trim
çš„åŽæž?BR>好了åQŒæœ€åŽæ˜¯æˆ‘们的TestAction.java
package com.cz.struct;
import com.opensymphony.xwork.*;
import com.opensymphony.webwork.*;
import java.util.*;
/**
* @author tijichen
*
* TODO To change the template for this generated type comment go to
* Window - Preferences - Java - Code Style - Code Templates
*/
public class TestAction extends ActionSupport
{
private SystableDAO systabledao;
String testname=null;
public void setSystableDAO(SystableDAO dao)
{
this.systabledao=dao;
}
public SystableDAO getSystableDAO()
{return this.systabledao;}
public String execute() throws Exception {
testname="executeing";
SystablePK pk=new SystablePK();
Systable newdata=new Systable();
pk.setFieldName("test");
pk.setTableName("test3");
newdata.setComp_id(pk);
newdata.setChineseName("tets");
systabledao.insert(newdata);
return Action.SUCCESS;
}
}
ok,¾~–译打包åQŒç„¶åŽåœ¨‹¹è§ˆå™¨åœ°å€æ ä¸è¾“å…¥http://localhost:8080/ä½ çš„å‘布目录/Test.action
看看åQŒæ˜¯ä¸æ˜¯æ•°æ®åº“里é¢å¤šå‡ÞZº†ä¸€æ¡æ•°æ®äº†åQ?BR>至于其他åQŒæ¯”如从™åµé¢æäº¤çš„值æ’入数æ®åº“½{‰ç‰åQŒè¿™é‡Œéƒ½ä¸å¤šè¯´äº†åQŒwebwork自带的samplež®±æ˜¯æœ€å¥½çš„å‚考资æ–?/P>
package zmsjdbc;
import java.sql.*;
public class mysql1
{
private String url="jdbc:mysql://localhost:3306/beyond";
//先下载MYSQL 驱动 mm.mysql-2.0.4-bin.jar 攑֜¨D:\JBuilder9\jdk1.4\jre\lib\ext ä¸?/P>
private String user="root";
private String pwd="";
public Connection getcon()
{
Connection con;
try
{ //åŠ è²é©±åЍ½E‹åº
Class.forName("org.gjt.mm.mysql.Driver").newInstance();
//创徘qžæŽ¥
con=DriverManager.getConnection(url,user,pwd);
return con;
}
catch(ClassNotFoundException e)
{
System.out.println("åŠ è²é©±åЍ½E‹åºå‡ºé”™");
}
catch(Exception e)
{
System.out.println("出现了好大的错误");
}
return null;
}
public ResultSet executeSql(String sqlstr)
{
Connection conn;
Statement stmt;
try
{
conn=getcon();
stmt=conn.createStatement();
ResultSet rs=stmt.executeQuery(sqlstr);
return rs;
}
catch(SQLException e)
{
System.out.print("èŽ·å–æ•°æ®é›†æ—¶å‡ºçŽ°é”™è¯¯");
}
return null;
}
public static void main(String[] args)
{
mysql1 mysql11 = new mysql1();
Connection conn;
ResultSet rs;
rs= mysql11.executeSql("select * from zms1");
try
{
while(rs.next())
{
System.out.println(rs.getString("name"));
}
}
catch(Exception e)
{
System.out.println(e.getMessage());
}
}
}