1月13日 家庭小账本（改） 开发记录

1、阅读构建之法 现代软件工程（第三版）

2、观看JSP+Servlet+MySql+Tomcat+JDBC项目详细讲解

3、更新信息代码修改如下

package com.edu.servlet;

import java.io.IOException;
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.Date;

import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import com.edu.dao.Userdao;
import com.edu.entity.User;

@WebServlet("/UpdateDoservlet")
public class UpdateDoservlet extends HttpServlet {
private static final long serialVersionUID = 1L;

protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
request.setCharacterEncoding("utf-8");
response.setCharacterEncoding("utf-8");
String ids = request.getParameter("id");
int id = Integer.parseInt(ids);
String username = request.getParameter("username");
String userused = request.getParameter("userused");
String usermoney = request.getParameter("usermoney");
String usedate = request.getParameter("usedate");
String used = request.getParameter("used");
Date date = new Date();
SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
try {
date=sdf.parse(usedate);
} catch (ParseException e) {
// TODO 自动生成的 catc
e.printStackTrace();
}
java.sql.Date sDate = new java.sql.Date(date.getTime());
User user = new User(id,username,userused,usermoney,sDate,used);
Userdao dao = new Userdao();
if(dao.UpdateId(user))
{
System.out.println("修改成功！！！");
}
else {
System.out.println("修改失败！！！");
}
request.getRequestDispatcher("/Showall.jsp").forward(request, response);
}

protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
// TODO Auto-generated method stub
doGet(request, response);
}

}

package com.edu.servlet;

import java.io.IOException;
import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import com.edu.dao.Userdao;
import com.edu.entity.User;

@WebServlet("/Updateservlet")
public class Updateservlet extends HttpServlet {
private static final long serialVersionUID = 1L;

protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
request.setCharacterEncoding("utf-8");
Userdao dao = new Userdao();
User user = new User();
String ids = request.getParameter("id");
int id = Integer.parseInt(ids);
user = dao.ResearchId(id);
request.setAttribute("user", user);
/*if(dao.UpdateId(user))
{
System.out.println("修改成功！！！");
}
else {
System.out.println("修改失败！！！");
}*/
request.getRequestDispatcher("/Updateused.jsp").forward(request, response);
}
protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
// TODO Auto-generated method stub
doGet(request, response);
}

}