zeromemos
最好的学习方法就是输出所学的知识JWT(JSON Web Token)工具类的使用
加入依赖
<!--JDK1.8 jwt依赖-->
<dependency>
<groupId>io.jsonwebtoken</groupId>
<artifactId>jjwt</artifactId>
<version>0.9.0</version>
</dependency>
工具类
package com.zeromemos.utils;
import io.jsonwebtoken.Claims;
import io.jsonwebtoken.Jws;
import io.jsonwebtoken.Jwts;
import io.jsonwebtoken.SignatureAlgorithm;
import org.springframework.util.StringUtils;
import javax.servlet.http.HttpServletRequest;
import java.util.Date;
public class JwtUtils {
//有效时长1天
public static final long EXPIRE = 1000 * 60 * 60 * 24;
//加密密钥
public static final String APP_SECRET = "ukc8BDbRigUDaY6pZFfWus2jZWLPHOukc8BDbRigUDaY6pZFfWus2jZWLPHO";
public static String getJwtToken(String id, String nickname){
String JwtToken = Jwts.builder()
.setHeaderParam("typ", "JWT")
.setHeaderParam("alg", "HS256")
//设置主题,可自定义
.setSubject("user_info")
//有效时间
.setIssuedAt(new Date())
.setExpiration(new Date(System.currentTimeMillis() + EXPIRE))
//设置想要的信息
.claim("id", id)
.claim("nickname", nickname)
//加密
.signWith(SignatureAlgorithm.HS256, APP_SECRET)
.compact();
return JwtToken;
}
/**
* 判断token是否存在与有效
* @param jwtToken
* @return
*/
public static boolean checkToken(String jwtToken) {
if(StringUtils.isEmpty(jwtToken)) return false;
try {
Jwts.parser().setSigningKey(APP_SECRET).parseClaimsJws(jwtToken);
} catch (Exception e) {
e.printStackTrace();
return false;
}
return true;
}
/**
* 判断token是否存在与有效
* @param request
* @return
*/
public static boolean checkToken(HttpServletRequest request) {
try {
String jwtToken = request.getHeader("token");
if(StringUtils.isEmpty(jwtToken)) return false;
Jwts.parser().setSigningKey(APP_SECRET).parseClaimsJws(jwtToken);
} catch (Exception e) {
e.printStackTrace();
return false;
}
return true;
}
/**
* 根据token获取会员信息
* @param jwtToken
* @return Claims
*/
public static Claims getMemberByJwtToken(String jwtToken) {
//解析token
Jws<Claims> claimsJws = Jwts.parser().setSigningKey(APP_SECRET).parseClaimsJws(jwtToken);
//取出内容
return claimsJws.getBody();
}
}
直接在测试目录下进行测试
package code;
import com.zeromemos.utils.JwtUtils;
import org.junit.Test;
public class JwtTest {
@Test
public void run1(){
String zero = JwtUtils.getJwtToken("1", "zero");
System.out.println(zero);
}
@Test
public void run2(){
System.out.println(JwtUtils.checkToken(""));
}
}
run1方法进行生成
run2方法进行检查是否有效,如过期
修改run2方法
@Test
public void run2(){
Claims memberByJwtToken = JwtUtils.getMemberByJwtToken("eyJ0eXAiOiJKV1QiLCJhbGciOiJIUzI1NiJ9.eyJzdWIiOiJ1c2VyX2luZm8iLCJpYXQiOjE2NzUyNjAwMzQsImV4cCI6MTY3NTM0NjQzNCwiaWQiOiIxIiwibmlja25hbWUiOiJ6ZXJvIn0.6D-Zm5MxrucIgroQbtzOPajKyWo8F6PUMN-xOxbKCx0");
String nickname = (String)memberByJwtToken.get("nickname");
System.out.println(memberByJwtToken);
System.out.println(nickname);
}
读取存放的信息
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