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<>一、前言
我们在开发中难免和JSON打交道，这不小编最近遇到了。需要把一些信息转成JSON字符串，然后保存到数据库中。想到两种方式，一是新建实体类，然后转化为JSON，小编比较懒，直接Map多香呀！我们直接只有阿里巴巴的fastjson来进行转化即可，很方便！
<>二、理想转化展示
{"gender":"男","name":"小明","age":"18"} // 为空显示 {}
<>三、导入maven依赖
<dependency> <groupId>com.alibaba</groupId> <artifactId>fastjson</artifactId> <
version>1.2.69</version> </dependency>
<>四、Map转化JSON字符串
private static String mapToJson() { Map<String,String> map = new HashMap<>();
map.put("age","18"); map.put("name","小明"); map.put("gender","男"); String string
= JSON.toJSONString(map); System.out.println(string); map.clear(); String
stringNull= JSON.toJSONString(map); System.out.println(stringNull); return
string; }
<>五、对象转JSON字符串
1. Pojo类
import lombok.Data; @Data public class UserPojo { private String name; private
String gender; private String age; }
2. 方法
private static String pojoToJson() { UserPojo userPojo = new UserPojo();
String stringNull= JSON.toJSONString(userPojo); System.out.println(stringNull);
userPojo.setAge("19"); userPojo.setGender("女"); userPojo.setName("小红"); String
string= JSON.toJSONString(userPojo); System.out.println(string); return string;
}
<>六、总结
这样就实现了哦，总体来说fastjson还是挺好用的，不过都说fastjson不安全，没有jackson安全。但是小编还是觉得fastjson用的比较多，也习惯了里面的方法了哈！！对你有帮助，点个赞呗！！
