使用Vue+JFinal框架搭建前后端分离开发模式

前后端分离作为Web开发的一种方式，现在应用越来越广泛。前端一般比较流行Vue.js框架，后端框架比较多，网上有很多Vue+SpringMVC前后端分离的demo，但是Vue+JFinal框架貌似没有搜到，本文基于Vue.js和JFinal框架，给出了搭建了一个前后端分离项目的简单例子。

第一步：maven搭建后端JFinal部分

1、用maven新建web项目，项目名vue-jfinal

2、添加JFinal框架和jetty容器等依赖

        <dependency>
            <groupId>javax.servlet</groupId>
            <artifactId>javax.servlet-api</artifactId>
            <version>4.0.1</version>
            <scope>provided</scope>
        </dependency>
        <dependency>
            <groupId>com.jfinal</groupId>
            <artifactId>jfinal</artifactId>
            <version>3.3</version>
        </dependency>
        <dependency>
            <groupId>com.jfinal</groupId>
            <artifactId>jetty-server</artifactId>
            <version>8.1.8</version>
            <scope>provided</scope>
        </dependency>

3. Modify 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>
    <display-name>Archetype Created Web Application</display-name>
    <filter>
        <filter-name>jfinal</filter-name>
        <filter-class>com.jfinal.core.JFinalFilter</filter-class>
        <init-param>
            <param-name>configClass</param-name>
            <param-value>common.demoConfig</param-value>
        </init-param>
    </filter>
    <filter-mapping>
        <filter-name>jfinal</filter-name>
        <url-pattern>/*</url-pattern>
    </filter-mapping>
</web-app>

4. Add demoController.java to the Package of the new controller in src/main/java

package controller;

import com.jfinal.core.Controller;

public class demoController extends Controller {
    public void index() {
        //跨域请求设置
        getResponse().addHeader("Access-Control-Allow-Origin", "*");
        renderJson("{\"age\":25,\"name\":\"huiliuyi\"}");
    }
}

5. Create a new common Package in src/main/java and add demoConfig.java

package common;

import com.jfinal.config.Constants;
import com.jfinal.config.Handlers;
import com.jfinal.config.Interceptors;
import com.jfinal.config.JFinalConfig;
import com.jfinal.config.Plugins;
import com.jfinal.config.Routes;
import com.jfinal.core.JFinal;
import com.jfinal.template.Engine;

import controller.demoController;

public class demoConfig extends JFinalConfig {

    @Override
    public void configConstant(Constants arg0) {
        arg0.setDevMode(true);
    }

    @Override
    public void configEngine(Engine arg0) {
        // TODO Auto-generated method stub

    }

    @Override
    public void configHandler(Handlers arg0) {
        // TODO Auto-generated method stub

    }

    @Override
    public void configInterceptor(Interceptors arg0) {
        // TODO Auto-generated method stub

    }

    @Override
    public void configPlugin(Plugins arg0) {
        // TODO Auto-generated method stub

    }

    @Override
    public void configRoute(Routes arg0) {
        arg0.add("/demo", demoController.class);
    }

    public static void main(String[] args) {
        JFinal.start("src/main/webapp", 8081, "/", 5);
    }
}

6. Run the demoConfig.java file, run as Java Applicaiton, as shown in the figure below, the backend is completed

In Eclipse Version: Oxygen.1 Release (4.7.1) the project directory is as follows:

Step 2: Use vue-cli to build the vue.js front-end part

1. Install vue-cli

npm install --global vue-cli

2. Create a project based on the webpack template

vue init webpack vue-jfinal

Next, there will be some yes/no options, set as shown below

3. Enter the project directory and install the vue-resource plugin

cd vue- jfinal 
npm install vue-resource

4. Use webstorm to open vue-jfinal, the project directory is as shown below, and set the Run/Debug Configuration

4. Add a reference to vue-resource in main.js

Original file

// The Vue build version to load with the `import` command
// (runtime-only or standalone) has been set in webpack.base.conf with an alias.
import Vue from 'vue'
import App from './App'
import router from './router'

Vue.config.productionTip = false

/* eslint-disable no-new */
new Vue({
  el: '#app',
  router,
  components: { App },
  template: '<App/>'
})

After adding:

// The Vue build version to load with the `import` command
// (runtime-only or standalone) has been set in webpack.base.conf with an alias.
import Vue from 'vue'
import App from './App'
import router from './router'
import VueResource from 'vue-resource'
Vue.use(VueResource)

Vue.config.productionTip = false

/* eslint-disable no-new */
new Vue({
  el: '#app' ,
  router,
  components: { App },
  template: '<App/>'
})

5. Modify the App.vue file in the vue-jfinal project

Original file

<template>
  <div id="app">
    <img src="./assets/logo.png">
    <router-view/>
  </div>
</template>

<script>
export default {
  name: 'App'
}
</script>

<style>
#app {
  font-family: 'Avenir', Helvetica, Arial, sans-serif;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-align: center;
  color: #2c3e50;
  margin-top: 60px;
}
</style>

After modification:

<template>
  <div id="app">
    <img src="./assets/logo.png">
    <h1>The server data is: {{serverData}}</h1>
    <button v-on:click="getdata()">Get server-side data</button>
    <router-view/>
  </div>
</template>

<script>
export default {
  name: 'App',
  data(){
    return {
      serverData:"页面数据"
    }
  },
  methods:{
    getdata(){
      this.$http.get('http://localhost:8081/demo').then(function(response){
        this.serverData=response.data
      })
    }
  }
}
</script>

<style>
#app {
  font-family: 'Avenir', Helvetica, Arial, sans-serif;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-align: center;
  color: #2c3e50;
  margin-top: 60px;
}
</style>

第三步：测试前后端分离

1、在webstorm中点击run按钮，浏览器中输入http://localhost:8080访问，出现下面界面则前端搭建成功

2、点击 获得后端数据按钮，出现下图则表示获得后端数据成功

 

第四步：将jfinal项目和vue项目放在同一个项目目录下，目录截图

git连接：https://github.com/Feynman61/vue-jfinal.git

总结：

前后端分离的开发模式现在已经非常普遍了，优点也很明了，就是将前后端开发人员的工作分离开，这样前后端开发人员就能专注于自己的工作，提高开发效率。

如果大家在实际操作中有什么问题，欢迎大家留言评论，我会第一时间回复大家。