Gradle study notes-split JavaEE project

Ready to work

create

First create the parent project normally,

and then create the sub-modules: right-click the parent project->new->module

I created three sub-modules as a demonstration here

Configuration

Common configuration of all modules

allprojects {
    plugins {
        id 'java'
    }

    group 'org.example'
    version '1.0-SNAPSHOT'

    repositories {
        mavenLocal()
        mavenCentral()
    }
    dependencies {
        testCompile group: 'junit', name: 'junit', version: '4.12'
        compile group: 'org.springframework', name: 'spring-context', version: '5.0.2.RELEASE'
        compile group: 'org.springframework', name: 'spring-web', version: '5.0.2.RELEASE'
        compile group: 'org.springframework', name: 'spring-webmvc', version: '5.0.2.RELEASE'
        providedCompile group: 'javax.servlet', name: 'javax.servlet-api', version: '3.0.1'
        providedCompile group: 'javax.servlet', name: 'jsp-api', version: '2.0'
    }
}

gradle_dao

1. Since I don’t use a database, it’s just a simple demonstration and no other configuration is needed.
   

2. The code has only one interface and one implementation class

• interface

package org.example.dao;
public interface UserDao {
    public String save();
}

• Implementation class

package org.example.dao.impl;

import org.example.dao.UserDao;
import org.springframework.stereotype.Repository;

@Repository
public class UserDaoImpl implements UserDao {
    @Override
    public String save() {
        return "save success";
    }
}

gradle_service

1. Rely on dao to provide services, need to be added in build.gradle

dependencies {
    compile project(":gradle_dao")
}

2. The code only wrote the interface and implementation class

• interface

package org.example.service;

public interface UserService {
    public String save();
}

• Implementation class

package org.example.service.impl;

import org.example.dao.UserDao;
import org.example.service.UserService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

@Service
public class UserServiceImpl implements UserService {
    @Autowired
    private UserDao userDao;

    @Override
    public String save() {
        return userDao.save();
    }
}

gradle_view

1. War package plug-in is required, and there are some more jsp dependencies

The dependency of providedCompile will take effect after enabling the war package plugin

apply plugin: 'war'


dependencies {
    compile project(":gradle_service")
    providedCompile group: 'javax.servlet', name: 'javax.servlet-api', version: '3.0.1'
    providedCompile group: 'javax.servlet', name: 'jsp-api', version: '2.0'
}

2. The code only writes a controller

package org.example.controller;

import org.example.service.UserService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.RequestMapping;

@Controller
@RequestMapping("/user")
public class UserController {
    @Autowired
    private UserService userService;
    @RequestMapping("/save")
    public String save(Model model){
        String save = userService.save();
        model.addAttribute("save", save);
        return "list";
    }
}

3. Add springmvc.xml under resources

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

    <!--配置组件扫描-->
    <context:component-scan base-package="org.example"/>
    <!--处理器映射器，处理器解析器-->
    <mvc:annotation-driven/>
    <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
        <!-- 配置逻辑视图的前缀 -->
        <property name="prefix" value="/WEB-INF/pages/" />
        <!-- 配置逻辑视图的后缀 -->
        <property name="suffix" value=".jsp" />
    </bean>
    <!--释放静态资源-->
    <mvc:default-servlet-handler/>
</beans>

4. There are WEB-INF/web.xml, index.jsp, WEB-INF/pages/ in webapp

• web.xml

<!DOCTYPE web-app PUBLIC
        "-//Sun Microsystems, Inc.//DTD Web Application 2.3//EN"
        "http://java.sun.com/dtd/web-app_2_3.dtd" >

<web-app xmlns="http://java.sun.com/xml/ns/javaee"
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://java.sun.com/xml/ns/javaee
          http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd"
         version="3.0">
<servlet>
    <servlet-name>springmvc</servlet-name>
    <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
    <init-param>
        <param-name>contextConfigLocation</param-name>
        <param-value>classpath:springmvc.xml</param-value>
    </init-param>
</servlet>
<servlet-mapping>
    <servlet-name>springmvc</servlet-name>
    <url-pattern>/</url-pattern>
</servlet-mapping>
</web-app>

• index.jsp

<%--
  Created by IntelliJ IDEA.
  User: jiajunbernoulli
  Date: 2020/11/20
  Time: 10:13
  To change this template use File | Settings | File Templates.
--%>
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
    <title>Title</title>
</head>
<body>
    <jsp:forward page="user/save"/>
</body>
</html>

• pages
  only wrote a list.jsp file

<%--
  Created by IntelliJ IDEA.
  User: jiajunbernoulli
  Date: 2020/11/20
  Time: 10:16
  To change this template use File | Settings | File Templates.
--%>
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
    <title>Title</title>
</head>
<body>
    ${save} 跳转到列表页面
</body>
</html>

Post a visit

Finally, set tomcat,

don’t forget to select the war package

and visit after startup