在前端解决跨域

news2024/9/22 22:59:45

1、环境依赖
C:\Users\cyberzhaohyvm>node -v
v14.17.3

C:\Users\cyberzhaohyvm>vue -V
@vue/cli 5.0.4

2、在项目所在目录，安装axios

进入项目所在目录：
D:\01sourcecode\10Tutorial\08Vue\17-2022-12-28-v2\elementui-demo
npm install axios

3、vue.config.js添加配置

module.exports = {

devServer: {

proxy: {

'/api': {

target: 'http://localhost:3000',

changeOrigin: true,

pathRewrite: {

'^/api': ''

}

4、App.vue调用

import axios from 'axios'

getToken(){

axios.post('api/user/login',{

username: 'zhangsan'

}).then(function(response){

console.log(response)

}).catch(function(error){

console.log(error)

});

}

5、springboot开发的一个服务端

@RestController

@RequestMapping("/user")

public class UserController {

    @PostMapping("/login")

    public Result login(@RequestBody User user){

        String token = JwtUtils.generateToken(user.getUsername());

        return Result.ok().data("token",token);



    }

package com.xdy.springboot4vue.utils;

import io.jsonwebtoken.Claims;
import io.jsonwebtoken.Jwts;
import io.jsonwebtoken.SignatureAlgorithm;

import java.security.Signature;
import java.util.Date;

public class JwtUtils {
    private static Integer expire = 604800;
    private static String secret = "abcdefghiabcdefghiabcdefghiabcdefghi";
    public static String generateToken(String username){
        Date now = new Date();
        Date expiration = new Date(now.getTime() + 1000 * expire);
        return Jwts.builder().setHeaderParam("type","JWT").setSubject(username).setIssuedAt(now).setExpiration(expiration).signWith(SignatureAlgorithm.HS256,secret).compact();
    }
    public static Claims getClaimsByToken(String token){
         return Jwts.parser().setSigningKey(secret).parseClaimsJws(token).getBody();

    }
}

package com.xdy.springboot4vue.utils;

import java.util.HashMap;
import java.util.Map;

public class Result {
    private Boolean success;
    private Integer code;
    private String message;
    private Map<String,Object> data = new HashMap<String,Object>();

    public Boolean getSuccess() {
        return success;
    }

    public void setSuccess(Boolean success) {
        this.success = success;
    }

    public Integer getCode() {
        return code;
    }

    public void setCode(Integer code) {
        this.code = code;
    }

    public String getMessage() {
        return message;
    }

    public void setMessage(String message) {
        this.message = message;
    }

    public Map<String, Object> getData() {
        return data;
    }

    public void setData(Map<String, Object> data) {
        this.data = data;
    }
    private Result(){

    }
    public static Result ok(){
        Result r = new Result();
        r.setSuccess(true);
        r.setCode(ResultCode.SUCCESS);
        r.setMessage("成功");
        return r;
    }
    public static Result error(){
        Result r = new Result();
        r.setSuccess(false);
        r.setCode(ResultCode.ERROR);
        r.setMessage("失败");
        return r;
    }
    public Result success(Boolean success){
        this.setSuccess(success);
        return this;
    }
    public Result message(String message){
        this.setMessage(message);
        return this;
    }
    public Result data(String key, Object value){
        this.data.put(key,value);
        return this;
    }
    public Result data(Map<String,Object> map){
        this.setData(map);
        return this;
    }
}

pom.xml配置文件

<?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 https://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>
    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.7.5</version>
        <relativePath/> <!-- lookup parent from repository -->
    </parent>
    <groupId>com.xdy.springboot4vue</groupId>
    <artifactId>springboot4vue</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <name>springboot4vue</name>
    <description>Demo project for Spring Boot</description>
    <properties>
        <java.version>1.8</java.version>
    </properties>
    <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
        </dependency>
        <dependency>
            <groupId>net.minidev</groupId>
            <artifactId>json-smart</artifactId>
            <version>2.3.1</version>
            <scope>compile</scope>
        </dependency>
        <dependency>
            <groupId>com.alibaba</groupId>
            <artifactId>fastjson</artifactId>
            <version>1.2.40</version>
        </dependency>
        <dependency>
            <groupId>com.baomidou</groupId>
            <artifactId>mybatis-plus-boot-starter</artifactId>
            <version>3.4.2</version>
        </dependency>
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <version>5.1.47</version>
        </dependency>
        <dependency>
            <groupId>com.alibaba</groupId>
            <artifactId>druid-spring-boot-starter</artifactId>
            <version>1.1.20</version>
        </dependency>
        <dependency>
            <groupId>io.jsonwebtoken</groupId>
            <artifactId>jjwt</artifactId>
            <version>0.9.0</version>
        </dependency>
    </dependencies>

    <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
            </plugin>
        </plugins>
    </build>

</project>

6、效果图：

http://localhost:8080/