JWT是
单点登录(SSO=single sign on)的实现方法之一
直接上代码
首先引入依赖
代码语言:javascript复制<dependencies>
<dependency>
<groupId>io.jsonwebtoken</groupId>
<artifactId>jjwt</artifactId>
</dependency>
</dependencies>
然后便是工具类的编写
JwtUtils.java
代码语言:javascript复制 //常量
public static final long EXPIRE = 1000 * 60 * 60 * 24; //token过期时间
public static final String APP_SECRET = "ukc8BDbRigUDaY6pZFfWus2jZWLPHO"; //秘钥
代码语言:javascript复制//生成token字符串的方法
public static String getJwtToken(String id, String nickname){
String JwtToken = Jwts.builder()
.setHeaderParam("typ", "JWT")
.setHeaderParam("alg", "HS256")
.setSubject("guli-user")
.setIssuedAt(new Date())
.setExpiration(new Date(System.currentTimeMillis() EXPIRE))
.claim("id", id) //设置token主体部分 ,存储用户信息
.claim("nickname", nickname)
.signWith(SignatureAlgorithm.HS256, APP_SECRET)
.compact();
return JwtToken;
}
代码语言:javascript复制/**
* 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;
}
代码语言:javascript复制
/**
* 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;
}
代码语言:javascript复制/**
* 根据token字符串获取会员id
* @param request
* @return
*/
public static String getMemberIdByJwtToken(HttpServletRequest request) {
String jwtToken = request.getHeader("token");
if(StringUtils.isEmpty(jwtToken)) return "";
Jws<Claims> claimsJws = Jwts.parser().setSigningKey(APP_SECRET).parseClaimsJws(jwtToken);
Claims claims = claimsJws.getBody();
return (String)claims.get("id");
}
完整代码:
代码语言:javascript复制package cn.tompro.commonutils;
import io.jsonwebtoken.Claims;
import io.jsonwebtoken.Jws;
import io.jsonwebtoken.Jwts;
import io.jsonwebtoken.SignatureAlgorithm;
import org.springframework.http.server.reactive.ServerHttpRequest;
import org.springframework.util.StringUtils;
import javax.servlet.http.HttpServletRequest;
import java.util.Date;
/**
* @author akaTom
* @since 2022/8/5
*/
public class JwtUtils {
//常量
public static final long EXPIRE = 1000 * 60 * 60 * 24; //token过期时间
public static final String APP_SECRET = "ukc8BDbRigUDaY6pZFfWus2jZWLPHO"; //秘钥
//生成token字符串的方法
public static String getJwtToken(String id, String nickname){
String JwtToken = Jwts.builder()
.setHeaderParam("typ", "JWT")
.setHeaderParam("alg", "HS256")
.setSubject("guli-user")
.setIssuedAt(new Date())
.setExpiration(new Date(System.currentTimeMillis() EXPIRE))
.claim("id", id) //设置token主体部分 ,存储用户信息
.claim("nickname", nickname)
.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字符串获取会员id
* @param request
* @return
*/
public static String getMemberIdByJwtToken(HttpServletRequest request) {
String jwtToken = request.getHeader("token");
if(StringUtils.isEmpty(jwtToken)) return "";
Jws<Claims> claimsJws = Jwts.parser().setSigningKey(APP_SECRET).parseClaimsJws(jwtToken);
Claims claims = claimsJws.getBody();
return (String)claims.get("id");
}
}