插入数据

import java.sql.*;/**

* @version 2012-02-22

* @author*/

public classInsertDemo {public static voidmain(String[] args) throws SQLException {

Connection conn= null;

Statement stmt= null;

String JDriver="com.microsoft.sqlserver.jdbc.SQLServerDriver";//SQL鏁版嵁搴撳紩鎿�

String connectDB="jdbc:sqlserver://localhost:1433;DatabaseName=JDBCTest";//鏁版嵁婧惵�

String user="sa";

String pwd="sql";try{//动态导入数据库的驱动

Class.forName(JDriver);//获取数据库链接

conn =DriverManager.getConnection(connectDB,user,pwd);//创造SQL语句

String sql = "INSERT INTO JDBCTestTable ( user_name, user_password ) VALUES ( 'balabala', '123456' )";//执行SQL语句

stmt =conn.createStatement();

stmt.executeUpdate(sql);

System.out.println("插入数据成功");

}catch(Exception e) {

e.printStackTrace();

stmt.close();

conn.close();

}

}

}

修改数据

import java.sql.Connection;

import java.sql.DriverManager;

import java.sql.SQLException;

import java.sql.Statement;public classUpdateDemo {public static voidmain(String[] args) throws SQLException {

Connection conn= null;

Statement stmt= null;try{//动态导入数据库的驱动

Class.forName("com.microsoft.sqlserver.jdbc.SQLServerDriver");//获取数据库链接

conn =DriverManager.getConnection("jdbc:sqlserver://localhost:1433;DatabaseName=JDBCTest","sa", "sql");//创造SQL语句

String sql = "UPDATE JDBCTestTable SET user_password = '456' WHERE user_name = 'Eric'";//执行SQL语句

stmt =conn.createStatement();

stmt.executeUpdate(sql);

System.out.println("更新数据成功");

}catch(Exception e) {

e.printStackTrace();

stmt.close();

conn.close();

}

}

}

删除数据

import java.sql.Connection;

import java.sql.DriverManager;

import java.sql.Statement;public classDeleteDemo {public static voidmain(String[] args){

String JDriver="com.microsoft.sqlserver.jdbc.SQLServerDriver";

String url="jdbc:sqlserver://127.0.0.1:1433;DatabaseName=JDBCTest";

String user="sa";

String password="sql";try{

Class.forName(JDriver);//动态导入数据库的驱动

Connection conn=DriverManager.getConnection(url, user, password);//获取数据库链接

String query="DELETE FROM JDBCTestTable WHERE user_name='Eric'";//创造SQL语句

Statement stmt=conn.createStatement();//执行SQL语句

stmt.executeUpdate(query);

System.out.println("删除数据成功");

stmt.close();

conn.close();

}catch(Exception e){

e.printStackTrace();

}

}

}

查询数据

import java.sql.Connection;

import java.sql.DriverManager;

import java.sql.ResultSet;

import java.sql.Statement;public classQueryDemo {public static voidmain(String[] args){

String JDriver="com.microsoft.sqlserver.jdbc.SQLServerDriver";

String url="jdbc:sqlserver://127.0.0.1:1433;DatabaseName=JDBCTest";

String user="sa";

String password="sql";try{

Class.forName(JDriver);//动态导入数据库的驱动

Connection conn=DriverManager.getConnection(url, user, password);//获取数据库链接

String query="SELECT * FROM JDBCTestTable";//创造SQL语句

Statement stmt=conn.createStatement();//执行SQL语句

ResultSet rs=stmt.executeQuery(query);while(rs.next()){

System.out.println(rs.getString("user_name")+":"+rs.getString(2));//密码字段的编号从1开始，密码排第二位

}

System.out.println("查询数据成功");

rs.close();

stmt.close();

conn.close();

}catch(Exception e){

e.printStackTrace();

}

}

}