1.springJdbcContext.xml
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:context="http://www.springframework.org/schema/context"
xmlns:aop="http://www.springframework.org/schema/aop"
xmlns:tx="http://www.springframework.org/schema/tx"
xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-2.5.xsd
http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-2.5.xsd
http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-2.5.xsd
http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-2.5.xsd">
<description>springApp</description>
<!-- dataSource for MySQL -->
<bean id="dataSource"
class="org.apache.commons.dbcp.BasicDataSource"
destroy-method="close">
<property name="driverClassName"
value="com.mysql.jdbc.Driver" />
<property name="url"
value="jdbc:mysql://localhost:3306/springapp" />
<property name="username" value="root" />
<property name="password" value="****" />
</bean>
<bean id = "TransactionManager"
class = "org.springframework.jdbc.datasource.DataSourceTransactionManager">
<property name = "dataSource" ref="dataSource"/>
</bean>
<!--1:配置一個JdbcTemplate實例，并將這個“共享的”，“安全的”實例注入到不同的DAO類中去-->
<bean id = "jdbcTemplate"
class = "org.springframework.jdbc.core.JdbcTemplate">
<property name = "dataSource" ref="dataSource"/>
</bean>
<bean id = "actorJdbcTemplateDao"
class = "com.logcd.bo.dao.impl.ActorJdbcTemplateDaoImpl">
<property name="jdbcTemplate" ref="jdbcTemplate"/>
</bean>
<!--2:將共享的DataSource實例注入到DAO中，JdbcTemplate實例在DataSource的setter方法中被創(chuàng)建-->
<bean id = "actorEventDao"
class = "com.logcd.bo.dao.impl.ActorEventDaoImpl">
<property name = "dataSource" ref="dataSource"/>
</bean>
<!--利用了攔截器的原理。-->
<bean id="transactionInterceptor"
class="org.springframework.transaction.interceptor.TransactionInterceptor">
<property name="transactionManager">
<ref bean="transactionManager" />
</property>
<!-- 配置事務(wù)屬性 -->
<property name="transactionAttributes">
<props>
<prop key="delete*">PROPAGATION_REQUIRED</prop>
<prop key="operate*">PROPAGATION_REQUIRED,-Exception</prop>
<prop key="insert*">PROPAGATION_REQUIRED,-Exception</prop>
<prop key="update*">PROPAGATION_REQUIRED,-Exception</prop>
<prop key="save*">PROPAGATION_REQUIRED</prop>
<prop key="find*">PROPAGATION_REQUIRED,readOnly</prop>
</props>
</property>
</bean>
<bean id="txProxy"
class="org.springframework.aop.framework.autoproxy.BeanNameAutoProxyCreator">
<property name="beanNames">
<list>
<value>*Dao*</value><!--只是為了測試，一般為service-->
</list>
</property>
<property name="interceptorNames">
<list>
<value>transactionInterceptor</value>
</list>
</property>
</bean>
</beans>
2.接口：(以第二種方式定義DAO)
package com.logcd.bo.dao;
import java.util.List;
import org.springframework.jdbc.support.KeyHolder;
import com.logcd.bo.Actor;
public interface ActorEventDao 
{
/** *//**
* 根據(jù)SQL建表
* @param sql
*/
public void createTableBySQL(String sql);
/** *//**
* 統(tǒng)計firstName相同的總數(shù)
* @param firstName
* @return
*/
public int findCountOfActorsByFirstName(String firstName);
/** *//**
* 插入記錄并返回自動生成的主鍵Id
* @param ps
* @return
*/
public KeyHolder insertActor(final Actor actor);
/** *//**
* 用SimpleJdbcInsert插入一條記錄:mysql測試成功
*/
public long inserOneActor(Actor actor);
/** *//**
* 插入/更新/刪除數(shù)據(jù)
* @param sql 有參數(shù)語句
* @param obj 參數(shù)值數(shù)組
*/
public int operateActor(String sql,Object[] obj);
/** *//**
* 根據(jù)SQL查詢記錄總數(shù)
* @param sql
* @return
*/
public int findRowCountBySQL(String sql);
/** *//**
* 根據(jù)Id查找指定對象
* @param id
* @return
*/
public Actor findActorById(long id);
/** *//**
* 根據(jù)Id查找指定對象
* @param id
* @return
*/
public Actor findActorByIdSimple(long id);
/** *//**
* 返回所有對象
* @return
*/
public List findAllActors();
/** *//**
* 批量更新
* @param actors
* @return
*/
public int[] updateBatchActors(final List actors);
/** *//**
* 批量更新
* @param actors
* @return
*/
public int[] updateBatchActorsSimple(final List<Actor> actors);
}
3.接口實現(xiàn)
package com.logcd.bo.dao.impl;
import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.util.List;
import javax.sql.DataSource;
import org.springframework.jdbc.core.JdbcTemplate;
import org.springframework.jdbc.core.PreparedStatementCreator;
import org.springframework.jdbc.core.RowMapper;
import org.springframework.jdbc.support.GeneratedKeyHolder;
import org.springframework.jdbc.support.KeyHolder;
import com.logcd.bo.Actor;
import com.logcd.bo.dao.ActorEventDao;
public class ActorEventDaoImpl implements ActorEventDao{
private JdbcTemplate jdbcTemplate;
//NamedParameterJdbcTemplate對JdbcTemplate封裝，增加了命名參數(shù)特性
private NamedParameterJdbcTemplate namedParameterJdbcTemplate;
//SimpleJdbcTemplate對JdbcTemplate封裝,某些特性要在java5以上才工作
private SimpleJdbcTemplate simpleJdbcTemplate;
//簡化插入數(shù)據(jù)操作
private SimpleJdbcInsert inserActor;
public void setDataSource(DataSource dataSource){
this.jdbcTemplate = new JdbcTemplate(dataSource);
this.namedParameterJdbcTemplate = new NamedParameterJdbcTemplate(dataSource);
this.simpleJdbcTemplate = new SimpleJdbcTemplate(dataSource);
this.inserActor = new SimpleJdbcInsert(dataSource)
.withTableName("actors")
.usingColumns("first_name","last_name")//插入這些字段
.usingGeneratedKeyColumns("id");//帶回生成的id
}
/** *//**
* 用SimpleJdbcInsert插入一條記錄
*/
public long inserOneActor(Actor actor){
Map<String,Object> parameters = new HashMap<String,Object>();
parameters.put("first_name",actor.getFirstName());
parameters.put("last_name",actor.getLastName());
return inserActor.executeAndReturnKey(parameters).longValue();
}
/** *//**
* 統(tǒng)計firstName相同的總數(shù)
* @param firstName
* @return
*/
public int findCountOfActorsByFirstName(String firstName){
String sql="select count(0) from actors where first_name = :first_name";
SqlParameterSource namedParameters = new MapSqlParameterSource("first_name",firstName);
//Map namedParameter = Collections.singletonMap("first_name",firstName);
//還有一種Bean封裝的方式
//SqlParameterSource namedParameters = new BeanPropertySqlParameterSource(exampleActor);
return this.namedParameterJdbcTemplate.queryForInt(sql, namedParameters);
}
/** *//**
* 根據(jù)SQL建表
* @param sql
*/
public void createTableBySQL(String sql) {
this.jdbcTemplate.execute(sql);
}
/** *//**
* 插入記錄并返回自動生成的主鍵Id(MySQL中不行，Oracle可以)
* @param ps
* @return
*/
public KeyHolder insertActor(final Actor actor){
final String addSql = "insert into actors(first_name,last_name) values (?,?)";
KeyHolder keyHolder = new GeneratedKeyHolder();
this.jdbcTemplate.update(new PreparedStatementCreator(){
public PreparedStatement createPreparedStatement(Connection conn) throws SQLException {
PreparedStatement ps =
conn.prepareStatement(addSql, new String[]{"id"});//返回id
ps.setString(1, actor.getFirstName());
ps.setString(2, actor.getLastName());
return ps;
}
});
System.out.println(keyHolder.getKey());
return keyHolder;
}
/** *//**
* 插入/更新/刪除數(shù)據(jù)
* @param sql 有參數(shù)語句
* @param obj 參數(shù)值數(shù)組
*/
public int operateActor(String sql,Object[] obj){
return this.jdbcTemplate.update(sql, obj);
}
/** *//**
* 根據(jù)SQL查詢記錄總數(shù)
* @param sql
* @return
*/
public int findRowCountBySQL(String sql){
return this.jdbcTemplate.queryForInt(sql);
}
/** *//**
* 根據(jù)Id查找指定對象
* @param id
* @return
*/
public Actor findActorById(long id){
Actor actor = (Actor) this.jdbcTemplate.queryForObject(
"select id,first_name,last_name from actors where id = ?",
new Object[]{new Long(id)},
new RowMapper(){
public Object mapRow(ResultSet rs, int rowNum) throws SQLException {
Actor act = new Actor();
act.setId(rs.getLong("id"));
act.setFirstName(rs.getString("first_name"));
act.setLastName(rs.getString("last_Name"));
return act;
}
});
return actor;
}
/** *//**
* 根據(jù)Id查找指定對象
* @param id
* @return
*/
public Actor findActorByIdSimple(long id){
String sql = "select id,first_name,last_name from actors where id = ?";
ParameterizedRowMapper<Actor> mapper = new ParameterizedRowMapper<Actor>(){
//notice the return type with respect to java 5 covariant return types
public Actor mapRow(ResultSet rs, int rowNum) throws SQLException {
Actor act = new Actor();
act.setId(rs.getLong("id"));
act.setFirstName(rs.getString("first_name"));
act.setLastName(rs.getString("last_Name"));
return act;
}
};
return this.simpleJdbcTemplate.queryForObject(sql, mapper, id);
}
/** *//**
* 返回所有對象
* @return
*/
public List findAllActors(){
return this.jdbcTemplate.query(
"select id,first_name,last_name from actors",
new ActorMapper());
}
/** *//**
* 定義一個靜態(tài)內(nèi)部類，在Dao的方法中被共享
* @author logcd
*/
private static final class ActorMapper implements RowMapper{
public Object mapRow(ResultSet rs, int rowNum) throws SQLException {
Actor act = new Actor();
act.setId(rs.getLong("id"));
act.setFirstName(rs.getString("first_name"));
act.setLastName(rs.getString("last_Name"));
return act;
}
}
}
/** *//**
* 批量更新
* @param actors
* @return
*/
public int[] updateBatchActors(final List actors){
int[] updateCounts =this.jdbcTemplate.batchUpdate(
"update actors set first_name = ?, last_name = ? where id =? ",
new BatchPreparedStatementSetter(){
public int getBatchSize() {
return actors.size();
}
public void setValues(PreparedStatement ps, int i) throws SQLException {
ps.setString(1, ((Actor)actors.get(i)).getFirstName());
ps.setString(2, ((Actor)actors.get(i)).getLastName());
ps.setLong(3, ((Actor)actors.get(i)).getId());
}
});
return updateCounts;
}
/** *//**
* 批量更新
* @param actors
* @return
*/
public int[] updateBatchActorsSimple(final List<Actor> actors){
//如果對象數(shù)組與占位符出現(xiàn)位置一一對應(yīng)
//SqlParameterSource[] batch = SqlParameterSourceUtils.createBatch(actors.toArray());
List<Object[]> batch = new ArrayList<Object[]>();
for(Actor actor:actors){
Object[] values = new Object[]{//注意順序
actor.getFirstName(),
actor.getLastName(),
actor.getId()};
batch.add(values);
}
int[] updateCounts = this.simpleJdbcTemplate.batchUpdate(
"update actors set first_name = ?, last_name = ? where id =? ",
batch);
return updateCounts;
}
4.測試
/** *//**
*
*/
package com.logcd.test;
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;
import org.springframework.jdbc.support.KeyHolder;
import com.logcd.bo.Actor;
import com.logcd.bo.dao.ActorEventDao;
import com.logcd.bo.dao.ActorJdbcTemplateDao;
import junit.framework.TestCase;
/** *//**
* @author logcd
*/
public class SpringJdbcTest extends TestCase {
private ActorEventDao actorEventDao;
private ActorJdbcTemplateDao actorJdbcTemplateDao;
protected void setUp() throws Exception {
super.setUp();
ApplicationContext context = new ClassPathXmlApplicationContext("springJdbcContext.xml");
actorEventDao = (ActorEventDao)context.getBean("actorEventDao");
actorJdbcTemplateDao = (ActorJdbcTemplateDao)context.getBean("actorJdbcTemplateDao");
}
protected void tearDown() throws Exception {
super.tearDown();
}
public void testActorEventDao(){
String creatSql = "create table ACTORS(" +
"ID int not null auto_increment," +
"FIRST_NAME varchar(15)," +
"LAST_NAME varchar(15)," +
"primary key (ID)" +
");" ;
//建表
actorEventDao.createTableBySQL(creatSql);
String addSql = "insert into actors(first_name,last_name) values(?,?);";
Object[] obj = new Object[]{"wang","jinming"};
//新增
System.out.println(actorEventDao.operateActor(addSql, obj));
String countSql = "select count(0) from actors";
System.out.println("Count:"+actorEventDao.findRowCountBySQL(countSql));
System.out.println("Count:"+actorJdbcTemplateDao.findRowCountBySQL(countSql));
//根據(jù)id查找
Actor actor = actorEventDao.findActorById(1);
System.out.println("id:"+actor.getId()+" first_name:"+actor.getFirstName()+" last_name:"+actor.getLastName());
//輸出所有
for(Object o:actorEventDao.findAllActors()){
Actor act = (Actor) o;
System.out.println("id:"+act.getId()+" first_name:"+act.getFirstName()+" last_name:"+act.getLastName());
}
Actor newAct=new Actor();
newAct.setFirstName("jin");
newAct.setLastName("ming");
KeyHolder keyHold =actorEventDao.insertActor(newAct);
System.out.println(keyHold.getKey());//mysql得不到id
List<Actor> list = new ArrayList<Actor>();
for(Object o:actorEventDao.findAllActors()){
Actor act = (Actor) o;
System.out.println("id:"+act.getId()+" first_name:"+act.getFirstName()+" last_name:"+act.getLastName());
act.setLastName("www");
list.add(act);
}
actorEventDao.batchUpdateActors(list);
for(Object o:actorEventDao.findAllActors()){
Actor act = (Actor) o;
System.out.println("id:"+act.getId()+" first_name:"+act.getFirstName()+" last_name:"+act.getLastName());
}
}
}
posted on 2010-03-09 19:10
J2EE學(xué)習(xí)筆記 閱讀(2017)
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