ServletVueEnv

介绍

Servlet + Vue 环境搭建

后端使用Servlet
前端使用Vue，使用vue-admin-template构建 vue-admin-template

后端构建

项目骨架

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使用maven项目，添加Servlet相关依赖

<?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>servlet-vue-init</groupId>
    <artifactId>backend</artifactId>
    <version>1.0</version>

    <properties>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
        <maven.compiler.source>1.8</maven.compiler.source>
        <maven.compiler.target>1.8</maven.compiler.target>

        <!-- Artifacts 依赖版本 -->
        <javax.servlet-api.version>3.1.0</javax.servlet-api.version>
        <jstl.version>1.2</jstl.version>
        <slf4j.version>1.7.32</slf4j.version>
    </properties>

    <dependencies>
        <!-- Servlet 3.1 API -->
        <dependency>
            <groupId>javax.servlet</groupId>
            <artifactId>javax.servlet-api</artifactId>
            <version>${javax.servlet-api.version}</version>
            <scope>provided</scope>
        </dependency>

        <!-- JSTL -->
        <dependency>
            <groupId>javax.servlet</groupId>
            <artifactId>jstl</artifactId>
            <version>${jstl.version}</version>
        </dependency>
        <dependency>
            <groupId>taglibs</groupId>
            <artifactId>standard</artifactId>
            <version>1.1.2</version>
        </dependency>

        <!-- lombok -->
        <!-- https://mvnrepository.com/artifact/org.projectlombok/lombok -->
        <dependency>
            <groupId>org.projectlombok</groupId>
            <artifactId>lombok</artifactId>
            <version>1.18.22</version>
            <scope>provided</scope>
        </dependency>

        <!-- fastjson -->
        <dependency>
            <groupId>com.alibaba</groupId>
            <artifactId>fastjson</artifactId>
            <version>1.2.80</version>
        </dependency>
    </dependencies>

    <build>
        <plugins>
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-compiler-plugin</artifactId>
                <version>3.10.0</version>
                <configuration>
                    <source>${maven.compiler.source}</source>
                    <target>${maven.compiler.target}</target>
                </configuration>
            </plugin>
            <!-- maven tomcat7插件 -->
            <plugin>
                <!-- https://mvnrepository.com/artifact/org.apache.tomcat.maven/tomcat7-maven-plugin -->
                <groupId>org.apache.tomcat.maven</groupId>
                <artifactId>tomcat7-maven-plugin</artifactId>
                <version>2.2</version>
                <configuration>
                    <port>8888</port>
                    <path>/</path>
                </configuration>
            </plugin>
        </plugins>
    </build>

</project>

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">

    <servlet>
        <servlet-name>LoginServlet</servlet-name>
        <servlet-class>servlet.LoginServlet</servlet-class>
    </servlet>

    <servlet-mapping>
        <servlet-name>LoginServlet</servlet-name>
        <url-pattern>/login</url-pattern>
    </servlet-mapping>

</web-app>

LoginServlet

package servlet;

import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.JSONObject;

import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.BufferedReader;
import java.io.IOException;
import java.util.Collections;
import java.util.HashMap;
import java.util.Map;

/**
 * login.
 *
 * @date 2022-05-04
 */
public class LoginServlet extends HttpServlet {

    @Override
    protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
        doPost(req, resp);
    }

    @Override
    protected void doPost(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
        req.setCharacterEncoding("UTF-8");
        resp.setCharacterEncoding("UTF-8");
        resp.setContentType("application/json");

        Map<String, Object> map = new HashMap<>();
        try {
            // 获取请求中的json串，解析成对象
            BufferedReader reader = req.getReader();
            StringBuilder builder = new StringBuilder();
            String line = reader.readLine();
            while (line != null) {
                builder.append(line);
                line = reader.readLine();
            }
            User user = JSON.parseObject(builder.toString(), User.class);

            if ("admin".equals(user.getUsername()) && "111111".equals(user.getPassword())) {
                map.put("code", 20000);
                map.put("data", Collections.singletonMap("token", "admin-token"));
                map.put("message", "登录成功");
            } else {
                map.put("code", 50008);
                map.put("message", "用户名密码错误");
            }
        } catch (Exception e) {
            e.printStackTrace();
            map.put("code", 50008);
            map.put("message", "系统异常");
        }

        resp.getWriter().write(JSONObject.toJSONString(map));
    }
}

添加到tomcat容器中启动

新建war包，确保class文件和lib包是对的

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添加tomcat server
发布 war包，并设置访问项目path 为 /

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配置本地tomcat地址以及自定义端口号
运行启动

前端构建

初始化

npm install
npm run dev

访问后端代理配置

vue.config.js
- 因为只测试login，只配置了login的代理

devServer: {
    port: port,
    open: true,
    overlay: {
      warnings: false,
      errors: true
    },
    before: require('./mock/mock-server.js'),
    proxy: {
      '/api/login': {
        target: 'http://localhost:8080/',
        ws: true,
        changeOrigin: true,
        pathRewrite: {
          '^/api': ''
        }
      }
    }
  },