Spring boot整合JWT实现登入认证
有一项技能可能改变你一生
之前分享了使用shiro实现登入认证，我们也可以使用jwt来实现这一功能
springboot整合jwt
pom.xml添加依赖
<dependencies>
<dependency>
<groupId>com.auth0</groupId>
<artifactId>java-jwt</artifactId>
<version>3.4.0</version>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<dependency>
<groupId>org.mybatis.spring.boot</groupId>
<artifactId>mybatis-spring-boot-starter</artifactId>
<version>2.1.2</version>
</dependency>
<dependency>
<groupId>org.projectlombok</groupId>
<artifactId>lombok</artifactId>
</dependency>
<dependency>
<groupId>com.alibaba</groupId>
<artifactId>druid</artifactId>
<version>1.1.22</version>
</dependency>
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
<exclusions>
<exclusion>
<groupId>org.junit.vintage</groupId>
<artifactId>junit-vintage-engine</artifactId>
</exclusion>
</exclusions>
</dependency>
</dependencies>
创建user表
CREATE TABLE `user` (
`id` int(11) NOT NULL AUTO_INCREMENT,
`name` varchar(30) DEFAULT NULL,
`password` varchar(64) DEFAULT NULL,
PRIMARY KEY (`id`)
) ENGINE=InnoDB AUTO_INCREMENT=3 DEFAULT CHARSET=utf8;
创建user实体类
package com.example.springbootjwt.entity;
/**
* @author kalvin
* @version 1.0
* @Date 2021/2/2 10:15
* @Description
**/
import lombok.Data;
import lombok.experimental.Accessors;
@Data
@Accessors(chain=true)
public class User {
private String id;
private String name;
private String password;
}
创建userDao
package com.example.springbootjwt.dao;
import com.example.springbootjwt.entity.User;
import org.apache.ibatis.annotations.Mapper;
@Mapper
public interface UserDao {
User login(User user);
}
创建userMapper.xml
<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN"
"http://mybatis.org/dtd/mybatis-3-mapper.dtd">
<mapper namespace="com.example.springbootjwt.dao.UserDao">
<select id="login" parameterType="User" resultType="User">
select * from user where name= #{name} and password= #{password}
</select>
</mapper>
创建UserService
package com.example.springbootjwt.service;
import com.example.springbootjwt.entity.User;
public interface UserService {
User login(User user);
}
创建UserServiceImpl
package com.example.springbootjwt.service;
import com.example.springbootjwt.dao.UserDao;
import com.example.springbootjwt.entity.User;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
/**
* @author kalvin
* @version 1.0
* @Date 2021/2/2 10:19
* @Description
**/
@Service
public class UserServiceImpl implements UserService {
@Autowired
private UserDao userDao;
@Override
public User login(User user) {
User user1 = userDao.login(user);
if(user1!=null){
return user1;
}
throw new RuntimeException("认证失败！");
}
}
自定义JWTInterceptor继承HandlerInterceptor
package com.example.springbootjwt.interceptor;
import com.auth0.jwt.exceptions.AlgorithmMismatchException;
import com.auth0.jwt.exceptions.SignatureVerificationException;
import com.auth0.jwt.exceptions.TokenExpiredException;
import com.example.springbootjwt.utils.JWTUtils;
import com.fasterxml.jackson.databind.ObjectMapper;
import org.springframework.web.servlet.HandlerInterceptor;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.util.HashMap;
import java.util.Map;
/**
* @author kalvin
* @version 1.0
* @Date 2021/2/2 10:27
* @Description
**/
public class JWTInterceptor implements HandlerInterceptor {
public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler)
throws Exception {
//获取请求头中的token
String token = request.getHeader("token");
Map<String,Object> map = new HashMap<String, Object>();
try {
JWTUtils.TokenVerify(token);
//放行请求
return true;
} catch (SignatureVerificationException e) {
map.put("msg", "无效签名");
e.printStackTrace();
} catch (TokenExpiredException e) {
map.put("msg", "token已过期");
e.printStackTrace();
} catch (AlgorithmMismatchException e) {
map.put("msg", "算法不一致");
e.printStackTrace();
} catch (Exception e) {
map.put("msg", "token无效");
e.printStackTrace();
}
map.put("state",false);
//使用jackson将map转为json
String json = new ObjectMapper().writeValueAsString(map);
response.setContentType("application/json;charset=UTF-8");
response.getWriter().print(json);
return false;
}
}
编写InterceptorConfig实现WebMvcConfigurer
package com.example.springbootjwt.config;
import com.example.springbootjwt.interceptor.JWTInterceptor;
import org.springframework.context.annotation.Configuration;
import org.springframework.web.servlet.config.annotation.InterceptorRegistry;
import org.springframework.web.servlet.config.annotation.WebMvcConfigurer;
/**
* @author kalvin
* @version 1.0
* @Date 2021/2/2 10:30
* @Description
**/
@Configuration
public class InterceptorConfig implements WebMvcConfigurer {
public void addInterceptors(InterceptorRegistry registry) {
//注册拦截器JWTInterceptor，对用户名密码登入进行权限验证
registry.addInterceptor(new JWTInterceptor())
//指定拦截器注册拦截器JWTInterceptor要拦截的请求(支持*通配符)
.addPathPatterns("/**")
//指定拦截器JWTInterceptor不拦截的请求(支持*通配符)
.excludePathPatterns("/user/login");
}
}
创建jwt工具
package com.example.springbootjwt.utils;
import java.util.Calendar;
import java.util.Map;
import com.auth0.jwt.JWT;
import com.auth0.jwt.JWTCreator;
import com.auth0.jwt.algorithms.Algorithm;
import com.auth0.jwt.interfaces.DecodedJWT;
/**
* @author kalvin
* @version 1.0
* @Date 2021/2/2 10:24
* @Description
**/
public class JWTUtils {
private static final String SIGN= "!@#$%^&*123456789";
/**
* 生成Token
*/
public static String getToken(Map<String,String> map) {
Calendar instance = Calendar.getInstance();
instance.add(Calendar.DATE, 7);
//创建JWTBuilder
JWTCreator.Builder builder = JWT.create();
//设置payload
map.forEach((k,v)->{
builder.withClaim(k, v);
});
//设置过期时间和签名，生成token
String token = builder.withExpiresAt(instance.getTime())
.sign(Algorithm.HMAC256(SIGN));
return token;
}
/**
* 验证token
*/
public static void TokenVerify(String token) {
JWT.require(Algorithm.HMAC256(SIGN)).build().verify(token);
}
/**
* 获取token信息
*/
public static DecodedJWT getTokenInfo(String token) {
DecodedJWT verify = JWT.require(Algorithm.HMAC256(SIGN)).build().verify(token);
return verify;
}
}
最后怎能少了我们的userController
package com.example.springbootjwt.controller;
import com.auth0.jwt.interfaces.DecodedJWT;
import com.example.springbootjwt.entity.User;
import com.example.springbootjwt.service.UserServiceImpl;
import com.example.springbootjwt.utils.JWTUtils;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RestController;
import javax.servlet.http.HttpServletRequest;
import java.util.HashMap;
import java.util.Map;
/**
* @author kalvin
* @version 1.0
* @Date 2021/2/2 10:31
* @Description
**/
@RestController
@Slf4j
public class UserController {
@Autowired
private UserServiceImpl userServiceImpl;
@GetMapping("/user/login")
public Map<String,Object> login(User user){
log.info("用户名：[{}]",user.getName());
log.info("密码：[{}]",user.getPassword());
Map<String,Object> map = new HashMap<String, Object>();
try {
User userDB = userServiceImpl.login(user);
Map<String,String> payload = new HashMap<String, String>();
payload.put("id", userDB.getId());
payload.put("name", userDB.getName());
String token = JWTUtils.getToken(payload);
map.put("state",true);
map.put("msg","认证成功");
map.put("token", token);
} catch (Exception e) {
map.put("state",false);
map.put("msg",e.getMessage());
}
return map;
}
@PostMapping("/user/test")
public Map<String,Object> test(HttpServletRequest request){
String token = request.getHeader("token");
DecodedJWT tokenInfo = JWTUtils.getTokenInfo(token);
log.info("用户id：[{}]",tokenInfo.getClaim("id").asString());
log.info("用户名：[{}]",tokenInfo.getClaim("name").asString());
Map<String,Object> map = new HashMap<String, Object>();
map.put("state", true);
map.put("msg","请求成功");
return map;
}
}
大致的项目结构如下：
image.png
到此运行一下吧，看看你成功了没？相信你都成功了吧！我学习一个新知识比较喜欢先写一个demo跑起来了再去理解会更轻松点，哈哈哈。
image.png
错误演示
image.png
完整项目代码获取途径：微信公众号 幽灵邀请函 回复 jwt
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