Java JDBC数据库 之 PreparedStatement

http://www.verejava.com/?id=16998433130739

下载 Oracle 或者 Mysql Jar 驱动 

mysql-connector-java-3.0.10-stable-bin.jar 
ojdbc14.jar 

package com.prepared.jdbc.test;

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

public class TestAdd
{
    public static void main(String[] args)
    {
        Connection conn=null;
        try
        {
            Class.forName("oracle.jdbc.driver.OracleDriver");
            conn=DriverManager.getConnection("jdbc:oracle:thin:@localhost:1521:orcl", "myspace", "myspace123");
            //创建一个执行 邦定 sql 语句的对象
            String sql="INSERT INTO dept(id,name)VALUES(?,?)";
            PreparedStatement pstmt=conn.prepareStatement(sql);
            //设置 ? 的参数的值
            pstmt.setInt(1, 1);
            pstmt.setString(2, "IT");
            //执行 绑定的sql 语句
            if(pstmt.executeUpdate()>0)
            {
                System.out.println("执行成功");
            }
            else
            {
                System.out.println("执行失败");
            }
        } catch (ClassNotFoundException e)
        {
            e.printStackTrace();
        } catch (SQLException e)
        {
            e.printStackTrace();
        }
        finally
        {
            try
            {
                conn.close();
            } catch (SQLException e)
            {
                e.printStackTrace();
            }
        }
    }
}





package com.prepared.jdbc.test;

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

public class TestDelete
{
    public static void main(String[] args)
    {
        Connection conn=null;
        try
        {
            Class.forName("oracle.jdbc.driver.OracleDriver");
            conn=DriverManager.getConnection("jdbc:oracle:thin:@localhost:1521:orcl", "myspace", "myspace123");
            //创建一个执行 邦定 sql 语句的对象
            String sql="DELETE FROM dept WHERE id=?";
            PreparedStatement pstmt=conn.prepareStatement(sql);
            //设置 ? 的参数的值
            pstmt.setInt(1, 1);
            //执行 绑定的sql 语句
            if(pstmt.executeUpdate()>0)
            {
                System.out.println("执行成功");
            }
            else
            {
                System.out.println("执行失败");
            }
        } catch (ClassNotFoundException e)
        {
            e.printStackTrace();
        } catch (SQLException e)
        {
            e.printStackTrace();
        }
        finally
        {
            try
            {
                conn.close();
            } catch (SQLException e)
            {
                e.printStackTrace();
            }
        }
    }
}





package com.prepared.jdbc.test;

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

public class TestUpdate
{
    public static void main(String[] args)
    {
        Connection conn=null;
        try
        {
            Class.forName("oracle.jdbc.driver.OracleDriver");
            conn=DriverManager.getConnection("jdbc:oracle:thin:@localhost:1521:orcl", "myspace", "myspace123");
            //创建一个执行 邦定 sql 语句的对象
            String sql="UPDATE dept SET name=? WHERE id=?";
            PreparedStatement pstmt=conn.prepareStatement(sql);
            //设置 ? 的参数的值
            pstmt.setString(1, "行政部");
            pstmt.setInt(2, 1);
            //执行 绑定的sql 语句
            if(pstmt.executeUpdate()>0)
            {
                System.out.println("执行成功");
            }
            else
            {
                System.out.println("执行失败");
            }
        } catch (ClassNotFoundException e)
        {
            e.printStackTrace();
        } catch (SQLException e)
        {
            e.printStackTrace();
        }
        finally
        {
            try
            {
                conn.close();
            } catch (SQLException e)
            {
                e.printStackTrace();
            }
        }
    }
}





package com.prepared.jdbc.test;

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

public class TestFind
{
    public static void main(String[] args)
    {
        Connection conn=null;
        try
        {
            Class.forName("oracle.jdbc.driver.OracleDriver");
            conn=DriverManager.getConnection("jdbc:oracle:thin:@localhost:1521:orcl", "myspace", "myspace123");
            //创建一个执行 邦定 sql 语句的对象
            String sql="SELECT * FROM dept";
            PreparedStatement pstmt=conn.prepareStatement(sql);
            
            //执行 绑定的sql 语句
            ResultSet rs=pstmt.executeQuery();
            while(rs.next())
            {
                int id=rs.getInt("id");
                String name=rs.getString("name");
                System.out.println(id+","+name);
            }
        } catch (ClassNotFoundException e)
        {
            e.printStackTrace();
        } catch (SQLException e)
        {
            e.printStackTrace();
        }
        finally
        {
            try
            {
                conn.close();
            } catch (SQLException e)
            {
                e.printStackTrace();
            }
        }
    }
}

http://www.verejava.com/?id=16998433130739