重写toString方法 打印对象为json

1 需要引入alibaba的jar包:

<dependency>
<groupId>com.alibabagroupId>
<artifactId>fastjsonartifactId>
<version>1.2.4version>
dependency>

2 代码示例
注意：写在对应的pojo类中

import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.serializer.SerializerFeature;

@Override
    public String toString() {
        return JSON.toJSONString(this, new SerializerFeature[]{SerializerFeature.WriteMapNullValue, SerializerFeature.WriteNullListAsEmpty,
                SerializerFeature.WriteNullStringAsEmpty, SerializerFeature.WriteNullNumberAsZero, SerializerFeature.WriteNullBooleanAsFalse,
                SerializerFeature.UseISO8601DateFormat });
    }

3 使用
直接使用被重写过的pojo类 即可得到json字符串

参考内容