jwt 加密解密 需要一个 signkey ，这个是个 Base64 加密的任意字符串：
根据 https://stackoverflow.com/questions/33960565/how-to-generate-a-hs512-secret-key-to-use-with-jwt
使用下面命令生成即可：
dd if=/dev/random bs=129 count=1 status=none | base64
顺便附上 使用 io.jsonwebtoken 解析的代码：
生成 token
依赖：
<dependency>
<groupId>io.jsonwebtoken</groupId>
<artifactId>jjwt</artifactId>
<version>0.9.1</version>
</dependency>
java代码：
private static final long TOKEN_DURATION = 7 * 24 * 60 * 60 * 1000;
@Value("${app.security.jwt.signingKey}")
String signingKey;
public String generateJWToken(Long uid) {
SignatureAlgorithm signatureAlgorithm = SignatureAlgorithm.HS512;
//生成JWT的时间
long nowMillis = System.currentTimeMillis();
Date now = new Date(nowMillis);
Map<String, Object> claims = new HashMap<String, Object>();
claims.put("said", uid);
List<String> authorities = new ArrayList<>();
authorities.add("ROLE_USER");
claims.put("said", uid);
claims.put("authorities", authorities);
JwtBuilder builder = Jwts.builder()
.setClaims(claims)
.setIssuedAt(now)
.setSubject(String.valueOf(uid))
.signWith(signatureAlgorithm, signingKey);
if (TOKEN_DURATION >= 0) {
long expMillis = nowMillis + TOKEN_DURATION;
Date exp = new Date(expMillis);
builder.setExpiration(exp);
}
return builder.compact();
}
解析token
claims = Jwts.parser()
.setSigningKey(signingKey)
.parseClaimsJws(s)
.getBody();
