测试json字符和java对象属性不一样在多个json框架下转换的表现

  • Z时代
  • 2024-01-10
  • 分类：综合

java

package com.longge.mytest;
import java.io.IOException;
import org.junit.Test;
import com.alibaba.fastjson.JSONObject;
import com.fasterxml.jackson.core.JsonParseException;
import com.fasterxml.jackson.databind.JsonMappingException;
import com.fasterxml.jackson.databind.ObjectMapper;
import com.google.gson.Gson;
public class TestJson {
    @Test
    public void test() throws JsonParseException, JsonMappingException, IOException {
        String str = "{\"id\": 1,\"updateBy\": \"zhufen_朱芬\"}";
        // 使用fastjson，代码正常
        TestDto dto = JSONObject.parseObject(str, TestDto.class);
        System.out.println(dto.getId());
        // 使用jackson，会抛出异常，因为updateBy在java对象里没这个属性
        ObjectMapper mapper = new ObjectMapper();
        try {
            dto = mapper.readValue(str, TestDto.class);
            System.out.println(dto.getId());
        } catch (Exception e) {
            System.out.println(e.getMessage());
        }
        // 使用谷歌的gson，代码正常
        Gson gson = new Gson();
        try {
            dto = gson.fromJson(str, TestDto.class);
            System.out.println(dto.getId());
        } catch (Exception e) {
            System.out.println(e.getMessage());
        }
    }
    static class TestDto {
        private Integer id;
        private String test;
        public Integer getId() {
            return id;
        }
        public void setId(Integer id) {
            this.id = id;
        }
        public String getTest() {
            return test;
        }
        public void setTest(String test) {
            this.test = test;
        }
    }
}

运行结果：

1
Unrecognized field "updateBy" (class com.longge.mytest.TestJson$TestDto), not marked as ignorable (2 known properties: "test", "id"])
 at [Source: {"id": 1,"updateBy": "zhufen_朱芬"}; line: 1, column: 23] (through reference chain: com.longge.mytest.TestJson$TestDto["updateBy"])
1

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