JWTUtil的parseToken增加空值异常抛出

hutool-jwt/src/main/java/cn/hutool/jwt/JWT.java

@@ -92,6 +92,7 @@ public class JWT implements RegisteredPayload<JWT> {
 	 * @return this
 	 */
 	public JWT parse(String token) {
+		Assert.notBlank(token, "Token String must be not blank!");
 		final List<String> tokens = splitToken(token);
 		this.tokens = tokens;
 		this.header.parse(tokens.get(0), this.charset);

hutool-jwt/src/test/java/cn/hutool/jwt/JWTUtilTest.java

@@ -43,6 +43,12 @@ public class JWTUtilTest {
 		Assert.assertEquals(true, jwt.getPayload("admin"));
 	}
 
+	@Test(expected = IllegalArgumentException.class)
+	public void parseNullTest(){
+		// https://gitee.com/dromara/hutool/issues/I5OCQB
+		JWTUtil.parseToken(null);
+	}
+
 	@Test
 	public void verifyTest(){
 		String token = "eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9." +