FastJson解析为实体类示例

字符串

{"msg":"success","code":0,"data":{"token":"xxx"},"httpStatus":200,"timestamp":1623828871643}      

实体类

public class ResultData {

    public String msg;
    public int code;
    public Token data;
    int httpStatus;
    long timestamp;

    public static class Token {
       public String token;
    }

}      

ResultData data = JSON.parseObject(str, ResultData.class);