package jdbc;

 import java.sql.Connection;

 import java.sql.DriverManager;

 import java.sql.ResultSet;

 import java.sql.SQLException;

 import java.sql.Statement;

 import org.junit.Test;

 import com.mysql.jdbc.Driver;

 public class JDBCUtil {

 public void ExecuteQuery() {

 Connection conn = null;

 Statement stmt = null;

 ResultSet rs = null;

 String url = null;

 String user = null;

 String password = null;

 String sql = null;

 try {

 Class.forName("com.mysql.jdbc.Driver"); //加载mysq驱动

 } catch (ClassNotFoundException e) {

 System.out.println("驱动加载错误");

 e.printStackTrace();//打印出错详细信息

 }

 try {

 url =

 "jdbc:mysql://WIN-7ERP:3306/msk_dev?user=root&password=Root123&useUnicode=true&&characterEncoding=gb2312&autoReconnect = true";//简单写法：url = "jdbc:myqsl://WIN-7ERP:3306/msk_dev? user=root(用户)&password=Root123(密码)";

 user = "root";

 password = "Root123";

 conn = DriverManager.getConnection(url,user,password);

 } catch (SQLException e) {

 System.out.println("数据库链接错误");

 e.printStackTrace();

 }

 try {

 stmt = conn.createStatement();

 sql = "select*from wq_customer";

 rs = stmt.executeQuery(sql);//执行sql语句

 while(rs.next()) {

 System.out.print(rs.getString(1) + " ");

 System.out.print(rs.getString(2) + " ");

 System.out.println(rs.getString(3) + " ");

 }

 } catch (SQLException e) {

 System.out.println("数据操作错误");

 e.printStackTrace();

 }

 //关闭数据库

 try {

 if(rs != null) {

 rs.close();

 rs = null;

 }

 if(stmt != null) {

 stmt.close();

 stmt = null;

 }

 if(conn != null) {

 conn.close();

 conn = null;

 }

 } catch(Exception e) {

 System.out.println("数据库关闭错误");

 e.printStackTrace();

 }

 }

 }