JDBC访问MySQL数据库实现过程

通过Java的JDBC访问MySQL数据库实现过程:

1. 安装mysql-5.0.24-win32:执行Setup.exe
 在安装的过程中有个语言选项,要设置成gbk(简体中文)默认的是拉丁文。
 否者存储的字母和汉子都不能识别而显示成问好“?”。
 如果在安装的时候没有进行手动选择,可以执行
 开始 --> MySQL --> MySQL Server Instance Configuration Wizard
 在Please select the default character set中选择第三项
 Manual Selected Default Character Set/Collation并在其下选择默认语言为gbk(简体中文)
2.安装数据库管理界面:执行MyManagerPro.exe
 在安装完后出现的管理界面(SQL Manager 2005 for MySQL UNREGISTERED)中,
 可以创建数据库。

 

3.将MySQL添加到工程的方法:

将mysql-connector-java-5.1.10-bin.jar复制到src下的某路径,Eclipse工程管理窗口中在mysql-connector-java-5.1.10-bin.jar

上右键 --> Build Path --> added to build path 自动产生默认的libs。


4.创建表(注意数据类型varchar(20))及记录的增加、查找、更新、删除
 程序代码如下:


package testJDBC;

import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;

public class TestSQL {

 public static void main(String[] args) {
  TestSQL testSQL = new TestSQL();
//  testSQL.testSelect();
//  testSQL.testInsert();
//  testSQL.testDelete();
//  testSQL.testUpdate();
//  testSQL.testCreatTable();
 }
 
 //创建表
 private void testCreatTable() {
  Connection cn = null;
  PreparedStatement ps = null;
  try {
   cn = this.getConnection();
   ps = cn.prepareStatement("create table customer1(n_id int,s_name

varchar(20),s_note varchar(20))");
   ps.execute();
  }catch(Exception e){
   e.printStackTrace();
  }finally{
   try {
    ps.close();
    cn.close();
   } catch (SQLException e) {
    e.printStackTrace();
   }
  }
 }
 
 //更新表中记录
 private void testUpdate() {
  Connection cn = null;
  PreparedStatement ps = null;
  try {
   cn = this.getConnection();
   String sName = "老胡";
   ps = cn.prepareStatement("update customer1 set s_name=? where

n_id=?");
   ps.setString(1, sName);
   ps.setInt(2, 5);
   ps.execute();
  }catch(Exception e){
   e.printStackTrace();
  }finally{
   try {
    ps.close();
    cn.close();
   } catch (SQLException e) {
    e.printStackTrace();
   }
  }
 }
 
 //删除记录
 private void testDelete() {
  Connection cn = null;
  PreparedStatement ps = null;
  try {
   cn = this.getConnection();
   ps = cn.prepareStatement("delete from customer1");
   ps.execute();
  }catch(Exception e){
   e.printStackTrace();
  }finally{
   try {
    ps.close();
    cn.close();
   } catch (SQLException e) {
    e.printStackTrace();
   }
  }
 }

 private Connection getConnection(){
  Connection cn = null;
  try {
   Class.forName("com.mysql.jdbc.Driver");
   cn = DriverManager.getConnection

("jdbc:mysql://localhost:3306/test","root","baobeiwanan");
  } catch (ClassNotFoundException e) {
   e.printStackTrace();
  } catch (SQLException e) {
   e.printStackTrace();
  }
  return cn;
 }
 
 //插入记录
 private void testInsert() {
  Connection cn = null;
  PreparedStatement ps = null;
  try{
   cn = this.getConnection();
   ps = cn.prepareStatement("insert into customer1 (s_name,s_note)

values('王','用')");
   ps.execute();
  }catch(Exception e){
   e.printStackTrace();
  } finally{
   try {
    ps.close();
    cn.close();
   } catch (SQLException e) {
    e.printStackTrace();
   }
  }
 }

 //查看表中记录
 public void testSelect(){
  ResultSet rs = null;
  Connection cn = null;
  PreparedStatement ps = null;
  try {
   cn = this.getConnection();
   ps = cn.prepareStatement("select * from customer1");
   rs = ps.executeQuery();
   while(rs.next()){
    String name = rs.getString(2);
    String note = rs.getString("s_note");
    System.out.println("name:"+name+"/tnote:"+note);
   }
  } catch (SQLException e) {
   e.printStackTrace();
  } finally{
   try {
    rs.close();
    ps.close();
    cn.close();
   } catch (SQLException e) {
    e.printStackTrace();
   }
  }
 }
 
}

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