06 my-shop项目

创建项目

1.创建文件夹 my-shop，用idea打开

2.创建pom.xml(添加依赖Junit  spring sevlet log4j),用idea托管

pom.xml

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0"
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>

    <groupId>com.example</groupId>
    <artifactId>my-shop</artifactId>
    <version>1.0.0-SNAPSHOT</version>
    <packaging>war</packaging>

    <dependencies>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-context</artifactId>
            <version>4.3.17.RELEASE</version>
        </dependency>
        <dependency>
            <groupId>org.slf4j</groupId>
            <artifactId>slf4j-log4j12</artifactId>
            <version>1.7.25</version>
        </dependency>
        <dependency>
            <groupId>junit</groupId>
            <artifactId>junit</artifactId>
            <version>4.13-beta-3</version>
            <scope>test</scope>
        </dependency>
        <dependency>
            <groupId>javax.servlet</groupId>
            <artifactId>javax.servlet-api</artifactId>
            <version>4.0.1</version>
        </dependency>
    </dependencies>
</project>

idea托管

3.完善maven目录结构

目录结构

web.xml

<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns="http://xmlns.jcp.org/xml/ns/javaee"
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_4_0.xsd"
         version="4.0">
    
    <display-name>my-shop</display-name>

</web-app>

4.完善架构目录（三层架构+MVC）

5.配置spring 与 log4j

在src/main/resources下创建spring-context.xml    log4j.properties

spring-context.xml

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
       xsi:schemaLocation="
       http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">

   
</beans>

log4j.properties

#根日志，配置了日志级别为INFO,预定义了console,file两种附加器
log4j.rootLogger=INFO, console, file
#console附加器，日志输出在控制台，采用匹配器布局模式，日志输出格式
log4j.appender.console=org.apache.log4j.ConsoleAppender
log4j.appender.console.layout=org.apache.log4j.PatternLayout
log4j.appender.console.layout.ConversionPattern=%d %p [%c] - %m%n
#file附加器，每天产生一个日志文件，输出在logs/log.log,采用匹配器布局模式，日志文件最大值，最多纪录文件数，日志格式
log4j.appender.file=org.apache.log4j.DailyRollingFileAppender
log4j.appender.file.File=logs/log.log
log4j.appender.file.layout=org.apache.log4j.PatternLayout
log4j.appender.A3.MaxFileSize=1024KB
log4j.appender.A3.MaxBackupIndex=10
log4j.appender.file.layout.ConversionPattern=%d %p [%c] - %m%n

6.创建index.jsp

7.配置jdk与tomcat

8.运行项目

Bootstrap后台管理模板

   下载AdminLTE https://github.com/ColorlibHQ/AdminLTE

   把需要的东西放到我们的项目的assets中去（css img js 是在list文件夹中）

      

注：我把brower_components复制进来之后API.md页面标红，修改这个就好了

登录界面

index.jsp 把登录界面一点一点复制过来（先熟悉一下，修改相应地方）

登录后台实现

写实体类User

package com.example.my.shop.entity;

public class User {
    private String email;
    private String password;

    public String getEmail() {
        return email;
    }

    public void setEmail(String email) {
        this.email = email;
    }

    public String getPassword() {
        return password;
    }

    public void setPassword(String password) {
        this.password = password;
    }

    @Override
    public String toString() {
        return "User{" +
                "email='" + email + '\'' +
                ", password='" + password + '\'' +
                '}';
    }
}

写UserDao

package com.example.my.shop.dao;

import com.example.my.shop.entity.User;

public interface UserDao {
    public User getUser(String email, String password);
}

写UserDaoImpl(没有连接数据库)

package com.example.my.shop.dao.impl;

import com.example.my.shop.dao.UserDao;
import com.example.my.shop.entity.User;

public class UserDaoImpl implements UserDao {
    public User getUser(String email, String password) {
        User user=null;
        if("[email protected]".equals(email)){
            if("admin".equals(password))
                user=new User();
                user.setEmail(email);
                user.setPassword(password);
        }
        return user;
    }
}

写UserService

package com.example.my.shop.service;

import com.example.my.shop.entity.User;

public interface UserService {
    public User login(String email,String password);
}

写UserServiceImpl（注入service）spring的配置获取不到bean，没找到原因，奇了怪

package com.example.my.shop.service.impl;

import com.example.my.shop.commons.context.SpringContext;
import com.example.my.shop.dao.UserDao;
import com.example.my.shop.dao.impl.UserDaoImpl;
import com.example.my.shop.entity.User;
import com.example.my.shop.service.UserService;
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;

public class UserServiceImpl implements UserService {
   /* SpringContext context=new SpringContext();
    UserDao userDao=(UserDao) context.getBean("userDao");*/
     // ApplicationContext context = new ClassPathXmlApplicationContext("spring-context.xml");
     // UserDao userDao=(UserDao) context.getBean("userDao");
    UserDao userDao=new UserDaoImpl();
    public User login(String email, String password) {
        return userDao.getUser(email,password);
    }
}

spring-context.xml定义bean

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
       xsi:schemaLocation="
       http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">

    <bean id="userDao" class="com.example.my.shop.dao.impl.UserDaoImpl" />
    <bean id="userService" class="com.example.my.shop.service.impl.UserServiceImpl"/>

</beans>

写LoginController(其实是sevlet)    spring的配置获取不到bean，没找到原因，奇了怪

package com.example.my.shop.Controller;

import com.example.my.shop.commons.context.SpringContext;
import com.example.my.shop.entity.User;
import com.example.my.shop.service.UserService;
import com.example.my.shop.service.impl.UserServiceImpl;
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;

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 java.io.IOException;


@WebServlet(name = "LoginController", urlPatterns = "/login")
public class LoginController extends HttpServlet {


    protected void doGet(HttpServletRequest req, HttpServletResponse resq) throws ServletException, IOException {

    }

    protected void doPost(HttpServletRequest req, HttpServletResponse resq) throws ServletException, IOException{

      //  ApplicationContext context = new ClassPathXmlApplicationContext("spring-context.xml");
       /* SpringContext context=new SpringContext();
        UserService userService=(UserService) context.getBean("userService");*/
        UserService userService=new UserServiceImpl();
        String email=req.getParameter("email");
        String password = req.getParameter("password");
        User user=userService.login(email,password);
        //登录失败的处理
        if(user==null){
            req.setAttribute("message","用户名或密码错误");
            req.getRequestDispatcher("/index.jsp").forward(req,resq);
        }

        //登录成功的处理
        else{
            resq.sendRedirect("/main.jsp");
        }

    }

}

就可以运行了，但是存在一个问题就是获取不到bean，找不到原因，现在是new的对象

接下来spring配置完web之后可以获取bean,奇怪