accountdao.java~62~

一个JDBC的程序。帮助入门理解JDBC的原理。。

package com.lx.test;

import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.*;
import java.util.List;
import java.util.ArrayList;

public class AccountDao {
    public boolean inserAccount(String name, Integer age, String sex) {
        boolean flag = false;
        Connection conn = null;
        PreparedStatement ps = null;
        try {
            conn = MyConnection.getConnection();
            ps = conn.prepareStatement("insert into student values(?,?,?)");
            ps.setString(1, name);
            ps.setInt(2, age);
            ps.setString(3, sex);
            if (ps.executeUpdate() == 1) {
                flag = true;
            }

        } catch (Exception ex) {
            ex.printStackTrace();
        } finally {
            try {
                ps.close();
                conn.close();
            } catch (Exception ex) {
                ex.printStackTrace();
            }
        }
        return flag;
    }

    public boolean genxin(Integer id, String name, Integer age, String sex) {
        boolean flag = false;
        Connection conn = null;
        conn = MyConnection.getConnection();
        PreparedStatement ps = null;
        try {
            ps = conn.prepareStatement(
                    "update student set name=?,age=?,sex=? where id=?");
            ps.setString(1, name);
            ps.setInt(2, age);
            ps.setString(3, sex);
            ps.setInt(4, id);
            if (ps.executeUpdate() == 1) {
                flag = true;
            }
        } catch (SQLException ex) {
        } finally {
            //关闭数据库连接
        }
        return flag;
    }

    public List selectByName(String name) {
        List list = new ArrayList();
        Connection conn = null;
        PreparedStatement ps = null;
        ResultSet rs = null;
        try {
            conn = MyConnection.getConnection();
            ps = conn.prepareStatement(
                    "select * from student where name like ?");
            ps.setString(1, name);
            rs = ps.executeQuery();
            Student stu=null;
            while(rs.next()){
                stu=new Student();
                stu.setId(rs.getInt("id"));
                stu.setName(rs.getString("name"));
                stu.setAge(rs.getInt("age"));
                stu.setSex(rs.getString("sex"));
                list.add(stu);
            }
        } catch (Exception ex) {
            ex.printStackTrace();
        }
        return list;
    }
}