barni的博客

注意：使用的包（ValidateCode.jar）例子：package com.qf.emp.controller;import cn.dsna.util.images.ValidateCode;import javax.servlet.ServletException;import javax.servlet.annotation.WebServlet;import javax.servlet.http.HttpServlet;import javax.servlet.http.H

注意事项：1、注解：@WebFilter(value = "/manager/safe/*")注解配置的是拦截访问对象的地址2、事项Filter接口例子：package com.qf.emp.Filter;import com.qf.emp.entity.EmpManager;import javax.servlet.*;import javax.servlet.annotation.WebFilter;import javax.servlet.http.*;impor

用于显示页面的HTML例子：package com.qf.emp.jsp;import com.qf.emp.entity.Emp;import javax.servlet.ServletException;import javax.servlet.annotation.WebServlet;import javax.servlet.http.HttpServlet;import javax.servlet.http.HttpServletRequest;import javax.

主要：接受页面传过来的数据，然后调用其他层数据操作。返回内容。例子：显示管理表所有内容package com.qf.emp.controller;import com.qf.emp.entity.Emp;import com.qf.emp.service.Empservice;import com.qf.emp.service.impl.EmpserviceImpl;import javax.servlet.ServletException;import javax.servlet.

接口层：package com.qf.emp.service;import com.qf.emp.entity.Emp;import java.util.List;public interface Empservice { public List<Emp> showAllEmp(); public int removeEmp(int id); public int modify(Emp emp); public Emp showEmp(in

接口类package com.qf.emp.dao;import com.qf.emp.entity.EmpManager;public interface EmpManagerDao { public EmpManager select(String username);}实现类package com.qf.emp.dao.impl;import com.qf.emp.dao.EmpManagerDao;import com.qf.emp.entity.Emp

//放置属性和属性的操作方法public class Emp { private int id; private String name; private double salary; private int age; public Emp(int id, String name, double salary, int age) { this.id = id; this.name = name; this.sal.

配置文件：database.properties内容：driver = com.mysql.jdbc.Driverurl=jdbc:mysql://localhost:3306/emp?useUnicode=true&characterEncoding=UTF-8 username=rootpassword=123456initialSize=10 maxActive=20 minIdle=5 maxWait=3000网络操作方法文件（DbUtils）//配置数据源