Java操作MySQL数据库示例

准备：

1. NetBeans IDE

2. MySQL

3. NetBeans IDE连接好MySQL服务

4. 在NetBeans IDE中新建一个项目，并在该项目引用的库中添加mysql-connector-java的jar包

5. java项目代码如下：

package mysql_test;

import com.mysql.jdbc.Driver;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;
import java.util.logging.Level;
import java.util.logging.Logger;
import javax.swing.JOptionPane;

/**
*
* @author Administrator
*/
public class MySQL_Test {

/**
* @param args the command line arguments
*/
public static void main(String[] args) {
// TODO code application logic here
Connection conn=null;
String sql;
String url="jdbc:mysql://localhost:3306/users?user=root&password=admin&useUnicode=true&charaterEncoding=UTF8";
try {
Class.forName("com.mysql.jdbc.Driver");
//com.mysql.jdbc.Driver driver = new com.mysql.jdbc.Driver();
//new com.mysql.jdbc.Driver();
conn=DriverManager.getConnection(url);
System.out.println("成功加载MySQL驱动程序");
Statement stmt=conn.createStatement();
//插入新数据
sql="INSERT INTO userinformation (username,password) VALUES ('UFO PERSON','PASSWORD YOU DONT KNOW')";
int result=stmt.executeUpdate(sql);
if(result!=-1){
System.out.println("插入数据成功");
}else{
System.out.println("插入数据不成功");
}
sql="SELECT * FROM userinformation";
ResultSet rs=stmt.executeQuery(sql);
System.out.println("id\tusername\tpassword\tlevel\t\n");
String rsMessage="";
//显示记录数据
while(rs.next()){
rsMessage+=rs.getInt(1)+" \n";
System.out.println(rs.getInt(1)+"\t"+rs.getString(2)+"\t"+rs.getString(3)+"\t"+rs.getInt(4)+"\t");
}
JOptionPane.showMessageDialog(null,rsMessage);
//删除记录数据
sql="DELETE FROM userinformation WHERE id>20";
result=stmt.executeUpdate(sql);
if(result!=-1){
System.out.println("删除成功");
}else{
System.out.println("删除不成功");
}

} catch (SQLException | ClassNotFoundException ex) {
Logger.getLogger(MySQL_Test.class.getName()).log(Level.SEVERE, null, ex);
}

}

}