FastJson校验json字符串是否合法

JSON.isValid(String str)、JSON.isValidObject(String str)、JSON.isValidArray(String str)均已过时并存在Bug，FastJson 1.2.60新增加一个高性能校验JSON字符串的API，还在验证阶段。支持输入类型是字符串、byte数组、InputStream、Reader。

参考：https://github.com/alibaba/fastjson/wiki/JSONValidator

JSONValidator API

package com.alibaba.fastjson;

public abstract class JSONValidator {
    // 支持输入类型是utf8编码的byte[]、String、InputStream、Reader
    public static JSONValidator fromUtf8(byte[] jsonBytes)
    public static JSONValidator fromUtf8(InputStream is)
    public static JSONValidator from(String str)
    public static JSONValidator from(Reader r)

    public boolean validate();
}

JSON字符串校验

String jsonStr = ...
JSONValidator validator = JSONValidator.from(jsonStr);
boolean valid = validator.validate();

UTF8 byte数组校验

输入参数是byte[]时，只支持UTF8编码

byte[] jsonBytes = ...
JSONValidator validator = JSONValidator.fromUtf8(jsonBytes);
boolean valid = validator.validate();

InputStream校验

输入参数是InputSteam时，只支持UTF8编码

InputStream is = ...
JSONValidator validator = JSONValidator.fromUtf8(is);
boolean valid = validator.validate();

Reader校验

Reader r = ...
JSONValidator validator = JSONValidator.from(r);
boolean valid = validator.validate();