【JDBC】java PreparedStatement操作oracle数据库

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****原文：blog.csdn.net/clark_xu  徐长亮的专栏

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import java.sql.Connection;

import java.sql.ResultSet;

import java.sql.SQLException;

//import java.sql.Statement;

import java.sql.PreparedStatement;

public class lx02{

public static void main(String[] args) throws SQLException, ClassNotFoundException{

  // 载入驱动

  Class.forName("oracle.jdbc.driver.OracleDriver");

  java.sql.DriverManager.registerDriver(new oracle.jdbc.driver.OracleDriver());

  

  //建立连接

  String url = "jdbc:oracle:thin:@100.100.100.20:1521:dbsid2";

  String user="scott";

  String password="tiger";

  Connection con=java.sql.DriverManager.getConnection(url, user, password);

  

  //运行语句

/*  String sql1="select * from user_tables";

  Statement smt=con.createStatement();

        ResultSet rs1=smt.executeQuery(sql1);

*/     

     //preparestatemetn语句: 输入

 /*    String sql2="insert into a(deptno,dname,loc) values(?

,?,?)";

  PreparedStatement ps=con.prepareStatement(sql2);

     ps.setString(1,"50");

     ps.setString(2, "pmo");

     ps.setString(3,"beijing");

     int rs2=ps.executeUpdate();

*/      

        //查询

  String sql="select dname from a where dname like ?

";

  PreparedStatement ps=con.prepareStatement(sql);

     ps.setString(1, "pmo");

     ResultSet rs=ps.executeQuery();

 

  

  //删除字节

/*  String sql="delete from a where deptno=50";

  PreparedStatement ps=con.prepareStatement(sql);

  ps.executeUpdate();

*/

  

  //显示结果

        while(rs.next()){

         System.out.println(rs.getString(1)); 

//      System.out.println(rs.getString(1) + "  " + rs.getString(2)+"   "+ rs.getString(3));

    }

//释放

       rs.close();

       ps.close();

       con.close();

  

 }

}

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