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jsp數據庫連接大全和數據庫操作封裝到Javabean

來源： http://blog.csdn.net/cm4ever/

一、jsp連接Oracle8/8i/9i數據庫（用thin模式）
testOracle.jsp如下：

<%@ page contentType="text/html;charset=gb2312"%>
<%@ page import="java.sql.*"%>
<%
????String result = ""; // 查詢結果字符串

????String sql = "select * from test"; // SQL 字符串

????// 連接字符串，格式： "jdbc:數據庫驅動名稱:連接模式:@數據庫服務器ip:端口號:數據庫SID"
????String url = "jdbc:oracle:thin:@localhost:1521:orcl";
????String username = "scott"; // 用戶名
????String password = "tiger"; //密碼

????// 創建oracle數據庫驅動實例
????Class.forName("oracle.jdbc.driver.OracleDriver").newInstance();

????// 獲得與數據庫的連接
????Connection conn = DriverManager.getConnection(url, username, password);?
????// 創建執行語句對象
????Statement??stmt = conn.createStatement();
????// 執行sql語句，返回結果集
????ResultSet? rs?? = stmt.executeQuery(sql);

????while ( rs.next() )
????{
????????result += "\n 第一個字段內容：" + rs.getString(1) + "<BR>";
????}

????rs.close();?// 關閉結果集
????stmt.close(); // 關閉執行語句對象
????conn.close(); // 關閉與數據庫的連接
%>

<HTML>
<BODY>
??<%=result%>
</BODY>
</HTML>

二、jsp連接Sql Server7.0/2000數據庫
testSqlServer.jsp如下

<%@ page contentType="text/html;charset=gb2312"%>
<%@ page import="java.sql.*"%>
<%
????String sql = "select * from test";

????// 連接字符串，格式： "jdbc:公司名稱:數據庫驅動名稱://數據庫服務器ip:端口號;DatabaseName=數據庫名稱"
????String url = "jdbc:microsoft:sqlserver://localhost:1433;DatabaseName=pubs";
????String username = "scott";
????String password = "tiger";

????Class.forName("com.microsoft.jdbc.sqlserver.SQLServerDriver").newInstance();

????Connection conn = DriverManager.getConnection(url, username, password);?
????Statement??stmt = conn.createStatement(ResultSet.TYPE_SCROLL_SENSITIVE, ResultSet.CONCUR_UPDATABLE);
????ResultSet? rs?? = stmt.executeQuery(sql);

%>

<HTML>
<BODY>

<%
????while ( rs.next() )
????{
????????%>
????????第一個字段內容為：<%=rs.getStrisng(1)%><BR>
????????<%
????}

????rs.close();
????stmt.close();
????conn.close();
%>

</BODY>
</HTML>

三、jsp連接DB2數據庫
testDB2.jsp如下：

<%@ page contentType="text/html;charset=gb2312"%>
<%@ page import="java.sql.*"%>
<%
????String sql = "select * from test";

????// 連接字符串，格式： "jdbc:數據庫驅動名稱://數據庫服務器ip:端口號/數據庫名稱"
????String url = "jdbc:db2://localhost:5000/sample";
????String username = "scott";
????String password = "tiger";

????Class.forName("com.ibm.db2.jdbc.app.DB2Driver").newInstance();

????Connection conn = DriverManager.getConnection(url, username, password);?
????Statement??stmt = conn.createStatement(ResultSet.TYPE_SCROLL_SENSITIVE, ResultSet.CONCUR_UPDATABLE);
????ResultSet? rs?? = stmt.executeQuery(sql);

????rs.close();
????stmt.close();
????conn.close();
%>

四、jsp連接Informix數據庫
testInformix.jsp如下：

<%@ page contentType="text/html;charset=gb2312"%>
<%@ page import="java.sql.*"%>
<%
????String sql = "select * from test";

????// 連接字符串，格式： "jdbc:數據庫驅動名稱://數據庫服務器ip:端口號/數據庫名稱:INFORMIXSERVER=服務器名;user=用戶名;password=密碼"
????String url = "jdbc:informix-sqli://123.45.67.89:1533/testDB:INFORMIXSERVER=myserver;user=testuser;password=testpassword";

????Class.forName("com.informix.jdbc.IfxDriver").newInstance();

????Connection conn = DriverManager.getConnection(url);?
????Statement??stmt = conn.createStatement(ResultSet.TYPE_SCROLL_SENSITIVE, ResultSet.CONCUR_UPDATABLE);
????ResultSet? rs?? = stmt.executeQuery(sql);

????rs.close();
????stmt.close();
????conn.close();
%>

五、jsp連接Sybase數據庫
testSybase.jsp如下：

<%@ page contentType="text/html;charset=gb2312"%>
<%@ page import="java.sql.*"%>
<%
????String sql = "select * from test";

????// 連接字符串，格式： "jdbc:公司名稱:數據庫驅動名稱:數據庫服務器ip:端口號/數據庫名稱"
????String url = "jdbc:sybase:Tds:localhost:5007/tsdata";

Properties prop = System.getProperties();
prop.put("user", "userid"); // 用戶名
prop.put("password",?"user_password"); // 密碼

????Class.forName("com.sybase.jdbc.SybDriver").newInstance();

????Connection conn = DriverManager.getConnection(url, prop);?
????Statement??stmt = conn.createStatement(ResultSet.TYPE_SCROLL_SENSITIVE, ResultSet.CONCUR_UPDATABLE);
????ResultSet? rs?? = stmt.executeQuery(sql);

????rs.close();
????stmt.close();
????conn.close();
%>

六、jsp連接MySQL數據庫
testMySQL.jsp如下：

<%@ page contentType="text/html;charset=gb2312"%>
<%@ page import="java.sql.*"%>
<%
????String sql = "select * from test";

????// 連接字符串，格式： "jdbc:數據庫驅動名稱://數據庫服務器ip/數據庫名稱?user=用戶名&password=密碼&使用Unicode=布爾值&字符編碼=編碼"
????String url = "jdbc:mysql://localhost/softforum?user=soft&password=soft1234&useUnicode=true&characterEncoding=8859_1";
????String username = "scott";
????String password = "tiger";

????Class.forName("org.gjt.mm.mysql.Driver").newInstance();

????Connection conn = DriverManager.getConnection(url, username, password);?
????Statement??stmt = conn.createStatement(ResultSet.TYPE_SCROLL_SENSITIVE, ResultSet.CONCUR_UPDATABLE);
????ResultSet? rs?? = stmt.executeQuery(sql);

????rs.close();
????stmt.close();
????conn.close();
%>

七、jsp連接PostgreSQL數據庫
testPostgreSQL.jsp如下：

<%@ page contentType="text/html;charset=gb2312"%>
<%@ page import="java.sql.*"%>
<%
????String sql = "select * from test";

????// 連接字符串，格式： "jdbc:數據庫驅動名稱://數據庫服務器ip/數據庫名稱"
????String url = "jdbc:postgresql://localhost/soft";
????String username = "scott";
????String password = "tiger";

????Class.forName(""org.postgresql.Driver").newInstance();

????Connection conn = DriverManager.getConnection(url, username, password);?
????Statement??stmt = conn.createStatement(ResultSet.TYPE_SCROLL_SENSITIVE, ResultSet.CONCUR_UPDATABLE);
????ResultSet? rs?? = stmt.executeQuery(sql);

????rs.close();
????stmt.close();
????conn.close();
%>

下面是簡單的數據庫操作Javabean的代碼:

DbWrapper.java

import java.sql.*;import java.util.*;publicclass DbWrapper
{// 定義連接池對象為靜態變量，將一直存在，直到工作目錄關閉。privatestatic DataSource ds =null;
// 1.用連接池的方式獲得連接// 如果不是做多數據庫程序，推薦使用此方法// 相關內容：在tomcat管理界面配置連接池publicstatic Connection openConnection()throws Exception
    {// 只需要初始化1次if( ds ==null){
            Context initContext =newInitialContext();
            Context envContext =(Context) initContext.lookup("java:/comp/env");
            DataSource ds =(DataSource) envContext.lookup("jdbc/MyDataSource");}return ds.getConnection();}// 2.用jdbc驅動獲得連接// 相關內容：JSP數據庫連接大全publicstatic Connection openConnection(
        String driver, 
        String url, 
        String username, 
        String password)throws Exception
    {
        Class.forName(driver).newInstance();return DriverManager.getConnection(url, username, password);}publicstaticvoidcloseConnection(Connection conn)throws Exception
    {if( conn !=null){
            conn.close();}}
publicstaticintexecuteUpdate(String sql)throws Exception
    {int count =0;
        
        Connection conn =null;
        Statement  stmt =null;try{
            conn =openConnection();
            stmt = conn.createStatement();
        
            count = stmt.executeUpdate(sql);}catch( Exception e ){throw e;}finally{closeConnection(conn);}return count;}publicstatic List executeQuery(String sql)throws Exception
    {
        List list =newArrayList();
        
        Connection conn =null;
        Statement  stmt =null;
        ResultSet  rs   =null;try{
            conn =openConnection();
            stmt = conn.createStatement();
            rs   = stmt.executeQuery(sql);
            
            ResultSetMetaData rsmd = rs.getMetaData();while( rs.next()){
                Map map =newHashMap();for(int i =1; i <= rsmd.getColumnCount(); i++){
                    map.put(rsmd.getColumnName(i), rs.getObject(i));}
                
                list.add(map);}
}catch( Exception e ){
            e.printStackTrace();}finally{if( rs !=null) rs.close();closeConnection(conn);}return list;
}}

// 1.對于insert, update, delete語句
int count = DbWrapper.executeUpdate(sql);
// 2.對于selete語句
java.util.List list = DbWrapper.executeQuery(sql);
// 方法一:按名字取值，注意大小寫是嚴格區分的for(int i =0; i < list.size(); i++){
    java.util.Map map =(java.util.Map)list.get(i);
    out.println(mag.get("column_name").toString());}
// 方法二：遍歷取值for(int i =0; i < list.size(); i++){
    java.util.Map map =(java.util.Map)list.get(i);
for(java.util.Iterator it = map.keySet().iterator(); it.hasNext();){
        String column_name = it.next().toString());

// 取值時注意null判斷
        out.println(column_name +" = "+ map.get(column_name) ==null?"": map.get(column_name).toString());}}

來源： http://blog.csdn.net/cm4ever/

posted on 2006-04-26 22:26 record java and net 閱讀(3025) 評論(0) 編輯收藏所屬分類: 轉載的文章

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