src/com/demo/dao/impl/UserDAOImpl.java

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package com.demo.dao.impl;

import com.demo.util.Util;
import com.demo.dao.UserDAO;
import com.demo.vo.User;

import java.io.Serializable;
import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.Statement;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

/**
 * 用户模块的DAO层（数据层）的具体实现类，对UserDAO接口中定义的增删改查等抽象方法作出具体的功能实现
 */
public class UserDAOImpl implements UserDAO {

    //@Override
    public void add(User vo) {
        String sql = "insert into `t_user` (`username`,`password`,`real_name`,`user_sex`,`user_phone`,`user_text`,`user_type`) values(?,?,?,?,?,?,?)";
        try {
            Connection c = Util.getConnection();
            PreparedStatement ps = c.prepareStatement(sql);
            
            ps.setString(1, vo.getUsername());
            ps.setString(2, vo.getPassword());
            ps.setString(3, vo.getRealName());
            ps.setString(4, vo.getUserSex());
            ps.setString(5, vo.getUserPhone());
            ps.setString(6, vo.getUserText());
            ps.setString(7, vo.getUserType());
            ps.execute();
            ps.close();
            c.close();
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

    //@Override
    public void update(User vo) {
        String sql = "update `t_user` set `username` = ? ,`password` = ? ,`real_name` = ? ,`user_sex` = ? ,`user_phone` = ? ,`user_text` = ? ,`user_type` = ?  where `id` = ?";
        try {
            Connection c = Util.getConnection();
            PreparedStatement ps = c.prepareStatement(sql);
            
            ps.setString(1, vo.getUsername());
            ps.setString(2, vo.getPassword());
            ps.setString(3, vo.getRealName());
            ps.setString(4, vo.getUserSex());
            ps.setString(5, vo.getUserPhone());
            ps.setString(6, vo.getUserText());
            ps.setString(7, vo.getUserType());
            ps.setLong(8, vo.getId());
            ps.execute();
            ps.close();