SpringBoot與JWT整合-有解無憂

SpringBoot與JWT整合

JWT的結構：

Header（頭）：包含令牌的型別與使用的簽名演算法，它會使用Base64進行編碼
{
	"alg": "HS265",
	"typ": "JWT"
}

Payload（有效負載）: 包含宣告（有關用戶物體和其他資料的宣告），使用Base64進行編碼
Base64是一種可逆的編碼，因此不要在負載里存入敏感資料！
{
	"id": "1",
	"name": "BLU",
	"admin": true
}

Signature（簽名）：使用編碼后的header和payload以及一個指定密鑰，然后使用header中指定的演算法（HS265）進行簽名.
簽名的作用是保證JWT沒有被篡改過

JWT的使用測驗：

依賴：

<dependency>
	<groupId>com.auth0</groupId>
	<artifactId>java-jwt</artifactId>
	<version>3.4.0</version>
</dependency>

測驗：

@Test
void getToken() {

	//HashMap<String,Object> map = new HashMap<String, Object>();
	Calendar instance = Calendar.getInstance();
	instance.add(Calendar.SECOND, 60);
	String token = JWT.create()
			//.withHeader(map)
			//設定Payload
			.withClaim("userId", 10)
			.withClaim("username", "BLU")
			//設定token過期時間(60s)
			.withExpiresAt(instance.getTime())
			//設定簽名
			.sign(Algorithm.HMAC256("!@#$%^&*"));
	System.out.println(token);

}

eyJ0eXAiOiJKV1QiLCJhbGciOiJIUzI1NiJ9.eyJleHAiOjE2MDA3NDA2MTUsInVzZXJJZCI6MTAsInVzZXJuYW1lIjoiQkxVIn0.0re-tA4dQm4blGhn1DvpnUl7Lrz_EWXwn8LfRbWQXCU

@Test
void TokenVerify() {
	//創建驗證物件
	JWTVerifier verifier = JWT.require(Algorithm.HMAC256("!@#$%^&*")).build();
	DecodedJWT verify = verifier.verify("eyJ0eXAiOiJKV1QiLCJhbGciOiJIUzI1NiJ9.eyJleHAiOjE2MDA3NDA2MTUsInVzZXJJZCI6MTAsInVzZXJuYW1lIjoiQkxVIn0.0re-tA4dQm4blGhn1DvpnUl7Lrz_EWXwn8LfRbWQXCU");
	System.out.println(verify.getClaim("userId").asInt());
	System.out.println(verify.getClaims().get("username").asString());
	System.out.println("過期時間："+verify.getExpiresAt());	
}

10
BLU
過期時間：Tue Sep 22 10:10:15 CST 2020

SpringBoot與JWT整合：

依賴

<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>

配置

spring.datasource.type=com.alibaba.druid.pool.DruidDataSource
spring.datasource.driver-class-name=com.mysql.cj.jdbc.Driver
spring.datasource.url=jdbc:mysql://localhost:3306/jwt?serverTimezone=UTC&useUnicode=true&characterEncoding=UTF-8
spring.datasource.username=root
spring.datasource.password=123456

mybatis.type-aliases-package=com.blu.entity
mybatis.mapper-locations=classpath:mapper/*.xml

logging.level.com.blu.dao=debug

資料庫user表：
物體類：

package com.blu.entity;

import lombok.Data;
import lombok.experimental.Accessors;

@Data
@Accessors(chain=true)
public class User {
	private String id;
	private String name;
	private String password;
}

UserDao：

package com.blu.dao;

import org.apache.ibatis.annotations.Mapper;
import com.blu.entity.User;

@Mapper
public interface UserDao {
	User login(User user);
}

UserMapper：

<?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.blu.dao.UserDao">
	<select id="login" parameterType="User" resultType="User">
		select * from user where name= #{name} and password= #{password}
	</select>
</mapper>

UserService：

package com.blu.service;

import com.blu.entity.User;

public interface UserService {
	User login(User user);
}

UserServiceImpl：

package com.blu.service.impl;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import com.blu.dao.UserDao;
import com.blu.entity.User;
import com.blu.service.UserService;

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

	@Override
	public User login(User user) {
		User userDB = userDao.login(user);
		if(userDB!=null) {
			return userDB;
		}
		throw new RuntimeException("認證失敗！");
	}
	
}

JWT的工具類封裝：

package com.blu.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;

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);
		//創建JWTBuilder
		JWTCreator.Builder builder = JWT.create();
		//設定payload
		map.forEach((k,v)->{
			builder.withClaim(k, v);
		});
		//設定過期時間和簽名，生成token
		String token = builder.withExpiresAt(instance.getTime())
			.sign(Algorithm.HMAC256(SIGN));
		return token;
	}
	
	/**
	 * 驗證token
	 */
	public static void TokenVerify(String token) {
		JWT.require(Algorithm.HMAC256(SIGN)).build().verify(token);
	}
	
	/**
	 * 獲取token資訊 
	 */
	public static DecodedJWT getTokenInfo(String token) {
		DecodedJWT verify = JWT.require(Algorithm.HMAC256(SIGN)).build().verify(token);
		return verify;
	}

}

JWTInterceptor 攔截器

package com.blu.interceptors;

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

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.springframework.web.servlet.HandlerInterceptor;

import com.auth0.jwt.exceptions.AlgorithmMismatchException;
import com.auth0.jwt.exceptions.SignatureVerificationException;
import com.auth0.jwt.exceptions.TokenExpiredException;
import com.blu.utils.JWTUtils;
import com.fasterxml.jackson.databind.ObjectMapper;

public class JWTInterceptor implements HandlerInterceptor {
	
	@Override
	public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler)
			throws Exception {
		//獲取請求頭中的token
		String token = request.getHeader("token");
		Map<String,Object> map = new HashMap<String, Object>();
		try {
			JWTUtils.TokenVerify(token);
			//放行請求
			return true;
		} catch (SignatureVerificationException e) {
			map.put("msg", "無效簽名");
			e.printStackTrace();
		} catch (TokenExpiredException e) {
			map.put("msg", "token已過期");
			e.printStackTrace();
		} catch (AlgorithmMismatchException e) {
			map.put("msg", "演算法不一致");
			e.printStackTrace();
		} catch (Exception e) {
			map.put("msg", "token無效");
			e.printStackTrace();
		}
		map.put("state",false);
		//使用jackson將map轉為json
		String json = new ObjectMapper().writeValueAsString(map);
		response.setContentType("application/json;charset=UTF-8");
		response.getWriter().print(json);
		return false;
	}

}

InterceptorConfig 配置類

package com.blu.config;

import org.springframework.context.annotation.Configuration;
import org.springframework.web.servlet.config.annotation.InterceptorRegistry;
import org.springframework.web.servlet.config.annotation.WebMvcConfigurer;

import com.blu.interceptors.JWTInterceptor;

@Configuration
public class InterceptorConfig implements WebMvcConfigurer {

	@Override
	public void addInterceptors(InterceptorRegistry registry) {
		registry.addInterceptor(new JWTInterceptor())
				.addPathPatterns("/**")
				.excludePathPatterns("/user/login");
	}
	
}

UserController

package com.blu.controller;

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

import javax.servlet.http.HttpServletRequest;

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 com.auth0.jwt.exceptions.AlgorithmMismatchException;
import com.auth0.jwt.exceptions.SignatureVerificationException;
import com.auth0.jwt.exceptions.TokenExpiredException;
import com.auth0.jwt.interfaces.DecodedJWT;
import com.blu.entity.User;
import com.blu.service.UserService;
import com.blu.utils.JWTUtils;

import lombok.extern.slf4j.Slf4j;

@RestController
@Slf4j
public class UserController {
	
	@Autowired
	private UserService userService;
	
	@GetMapping("/user/login")
	public Map<String,Object> login(User user){
		log.info("用戶名：[{}]",user.getName());
		log.info("密碼：[{}]",user.getPassword());
		Map<String,Object> map = new HashMap<String, Object>();
		try {
			User userDB = userService.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","認證成功");
			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("用戶id：[{}]",tokenInfo.getClaim("id").asString());
		log.info("用戶名：[{}]",tokenInfo.getClaim("name").asString());
		Map<String,Object> map = new HashMap<String, Object>();
		map.put("state", true);
		map.put("msg","請求成功");
		return map;
	}
	
}

測驗

登錄獲取token：
在這里插入圖片描述
測驗錯誤的token：

測驗正確的token：

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