mybean.java

来自「一个简单的JUNIT的测试程序 应该有用的」· Java 代码 · 共 46 行

package com.junit;

import java.sql.*;
import java.io.*;

public class MyBean{
  
  Statement stmt=null;
  ResultSet rs=null;
  Connection conn=null;
  String result=null;
  
  public String con(){                                                  //初始化数据库                      
    try{  
      Class.forName("com.mysql.jdbc.Driver").newInstance(); 
      String url ="jdbc:mysql://localhost:3306/buy";
      conn= DriverManager.getConnection(url,"root","1111");
      return "Connection Success!";
    }
    catch(Exception e){
      System.out.println(e);
      return "Connection Error!";
    }
  }
  
  public String gogo(int lmdm){                                       //查询数据库
    try{   
      stmt=conn.createStatement(); 
      String sql="select * from consume where CONSUMEID='"+lmdm+"'";
      rs=stmt.executeQuery(sql);                                         //执行查询
      while (rs.next()){
        result=rs.getString("PRICE");
      }
    }
    catch(Exception e){
      result=e.toString();
    }
    finally {                                                            //关闭JDBC资源 
      if(rs != null) try { rs.close(); } catch(SQLException ex) { ex.printStackTrace(); }
      if(conn != null) try { conn.close(); } catch(SQLException ex) { ex.printStackTrace(); }
    }
    return result;
  }
}