jsp數據庫連接大全和數據庫操作封裝到Javabean

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.對於insert, update, delete語句
int count = DbWrapper.executeUpdate(sql);
// 2.對於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());}}

jsp數據庫連接大全和數據庫操作封裝到Javabean

一、jsp連接Oracle8/8i/9i數據庫（用thin模式）

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