请教一个 fastjson 1 版本完全可以正常解析为对象，但是 fastjson 2 只能解析一个字段的值，其他字段都没有解析， list 也没解析
OpenYanxi · 6 天前 · 329 次点击JDK 版本使用的 17 ， 使用 JDK 11 ， 也是一样的结果。
使用的 fast json：
1.x 版本使用的：
<dependency>
<groupId>com.alibaba</groupId>
<artifactId>fastjson</artifactId>
<version>1.2.83</version>
</dependency>
2.x 版本使用的：
<dependency>
<groupId>com.alibaba.fastjson2</groupId>
<artifactId>fastjson2</artifactId>
<version>2.0.53</version>
</dependency>
原始的 json 字符串如下， （用 bejson 校验过，是对的）
{
"ListBucketResult":{
"xmlns":"http://s3.amazonaws.com/doc/2006-03-01/",
"Name":"a_name",
"Prefix":"",
"Marker":"",
"MaxKeys":1000,
"IsTruncated":false,
"Contents":[
{
"Key":"E.jpg",
"LastModified":"2024-11-01T13:09:17.000Z",
"ETag":"\"tag-1\"",
"Size":26579,
"Owner":{
"ID":"xx1",
"DisplayName":"c_name"
},
"StorageClass":"STANDARD"
},
{
"Key":"地球.jpg",
"LastModified":"2024-11-07T13:56:43.000Z",
"ETag":"\"tag-2\"",
"Size":26579,
"Owner":{
"ID":"xx2",
"DisplayName":"c_name"
},
"StorageClass":"STANDARD"
}
]
}
}
准备接收的实体如下：
package com.code.domain;
import lombok.AllArgsConstructor;
import lombok.Data;
import lombok.NoArgsConstructor;
import java.io.Serializable;
import java.util.List;
@Data
@NoArgsConstructor
@AllArgsConstructor
public class ListBucketResult implements Serializable {
/**
* 包装体
*/
private ListBucketResultContent ListBucketResult;
@Data
@NoArgsConstructor
@AllArgsConstructor
public static class ListBucketResultContent implements Serializable {
private String xmlns;
private String name;
private String prefix;
private String marker;
private int maxKeys;
private boolean isTruncated;
private List<Contents> contents;
}
@Data
@NoArgsConstructor
@AllArgsConstructor
public static class Contents implements Serializable {
private String key;
private String lastModified;
private String eTag;
private int size;
private Owner owner;
private String storageClass;
@Data
@NoArgsConstructor
@AllArgsConstructor
public static class Owner {
private String id;
private String displayName;
}
}
}
对 fastjson 1 测试类：
package com.code;
import com.alibaba.fastjson.JSON;
import com.code.s3xmlgateway.domain.ListBucketResult;
import org.junit.jupiter.api.Test;
public class Fast1Test {
@Test
public void testFast1()
{
String rawJsonStr = "{\n" +
"\t\"ListBucketResult\":{\n" +
"\t\t\"xmlns\":\"http://s3.amazonaws.com/doc/2006-03-01/\",\n" +
"\t\t\"Name\":\"a_name\",\n" +
"\t\t\"Prefix\":\"\",\n" +
"\t\t\"Marker\":\"\",\n" +
"\t\t\"MaxKeys\":1000,\n" +
"\t\t\"IsTruncated\":false,\n" +
"\t\t\"Contents\":[\n" +
"\t\t\t{\n" +
"\t\t\t\t\"Key\":\"E.jpg\",\n" +
"\t\t\t\t\"LastModified\":\"2024-11-01T13:09:17.000Z\",\n" +
"\t\t\t\t\"ETag\":\"\\\"tag-1\\\"\",\n" +
"\t\t\t\t\"Size\":26579,\n" +
"\t\t\t\t\"Owner\":{\n" +
"\t\t\t\t\t\"ID\":\"xx1\",\n" +
"\t\t\t\t\t\"DisplayName\":\"c_name\"\n" +
"\t\t\t\t},\n" +
"\t\t\t\t\"StorageClass\":\"STANDARD\"\n" +
"\t\t\t},\n" +
"\t\t\t{\n" +
"\t\t\t\t\"Key\":\"地球.jpg\",\n" +
"\t\t\t\t\"LastModified\":\"2024-11-07T13:56:43.000Z\",\n" +
"\t\t\t\t\"ETag\":\"\\\"tag-2\\\"\",\n" +
"\t\t\t\t\"Size\":26579,\n" +
"\t\t\t\t\"Owner\":{\n" +
"\t\t\t\t\t\"ID\":\"xx2\",\n" +
"\t\t\t\t\t\"DisplayName\":\"c_name\"\n" +
"\t\t\t\t},\n" +
"\t\t\t\t\"StorageClass\":\"STANDARD\"\n" +
"\t\t\t}\n" +
"\t\t]\n" +
"\t}\n" +
"}";
ListBucketResult listBucketResult = JSON.parseObject(rawJsonStr, ListBucketResult.class);
System.out.println(listBucketResult);
}
}
运行结果：
ListBucketResult(ListBucketResult=ListBucketResult.ListBucketResultContent(xmlns=http://s3.amazonaws.com/doc/2006-03-01/, name=a_name, prefix=, marker=, maxKeys=1000, isTruncated=false, contents=[ListBucketResult.Contents(key=E.jpg, lastModified=2024-11-01T13:09:17.000Z, eTag="tag-1", size=26579, owner=com.code.s3xmlgateway.domain.ListBucketResult$Contents$Owner@188715b5, storageClass=STANDARD), ListBucketResult.Contents(key=地球.jpg, lastModified=2024-11-07T13:56:43.000Z, eTag="tag-2", size=26579, owner=com.code.s3xmlgateway.domain.ListBucketResult$Contents$Owner@1ea9f6af, storageClass=STANDARD)]))
如上可以看出，运行结果一切正常，可以正常解析为对象的值
针对 fastjson 2 的测试类：
package com.code;
import com.alibaba.fastjson2.JSON;
import com.code.s3xmlgateway.domain.ListBucketResult;
import org.junit.jupiter.api.Test;
public class Fast2Test {
@Test
public void testFast2()
{
String rawJsonStr = "{\n" +
"\t\"ListBucketResult\":{\n" +
"\t\t\"xmlns\":\"http://s3.amazonaws.com/doc/2006-03-01/\",\n" +
"\t\t\"Name\":\"a_name\",\n" +
"\t\t\"Prefix\":\"\",\n" +
"\t\t\"Marker\":\"\",\n" +
"\t\t\"MaxKeys\":1000,\n" +
"\t\t\"IsTruncated\":false,\n" +
"\t\t\"Contents\":[\n" +
"\t\t\t{\n" +
"\t\t\t\t\"Key\":\"E.jpg\",\n" +
"\t\t\t\t\"LastModified\":\"2024-11-01T13:09:17.000Z\",\n" +
"\t\t\t\t\"ETag\":\"\\\"tag-1\\\"\",\n" +
"\t\t\t\t\"Size\":26579,\n" +
"\t\t\t\t\"Owner\":{\n" +
"\t\t\t\t\t\"ID\":\"xx1\",\n" +
"\t\t\t\t\t\"DisplayName\":\"c_name\"\n" +
"\t\t\t\t},\n" +
"\t\t\t\t\"StorageClass\":\"STANDARD\"\n" +
"\t\t\t},\n" +
"\t\t\t{\n" +
"\t\t\t\t\"Key\":\"地球.jpg\",\n" +
"\t\t\t\t\"LastModified\":\"2024-11-07T13:56:43.000Z\",\n" +
"\t\t\t\t\"ETag\":\"\\\"tag-2\\\"\",\n" +
"\t\t\t\t\"Size\":26579,\n" +
"\t\t\t\t\"Owner\":{\n" +
"\t\t\t\t\t\"ID\":\"xx2\",\n" +
"\t\t\t\t\t\"DisplayName\":\"c_name\"\n" +
"\t\t\t\t},\n" +
"\t\t\t\t\"StorageClass\":\"STANDARD\"\n" +
"\t\t\t}\n" +
"\t\t]\n" +
"\t}\n" +
"}";
ListBucketResult listBucketResult = JSON.parseObject(rawJsonStr, ListBucketResult.class);
System.out.println(listBucketResult);
}
}
运行结果：
ListBucketResult(ListBucketResult=ListBucketResult.ListBucketResultContent(xmlns=http://s3.amazonaws.com/doc/2006-03-01/, name=null, prefix=null, marker=null, maxKeys=0, isTruncated=false, contents=null))
使用 fastjson2 可以看到，只解析了 xmlns 这个字段的值； 我尝试在原始的 json 删掉这个 xmlns 字段，结果会是其他字段一样不能解析，list 也无法解析。
自己查阅了 fastjson 的文档 和 升级文档，没找到类似的说明
因此请教下社区的各位大神， 看这是什么情况？ 谢谢
2 条回复 • 2024-11-09 14:22:13 +08:00
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1
kokutou 6 天前 via Android  2
你就说快不快吧
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