我有以下 JSON,我正在尝试使用 Jackson API 对其进行反序列化
"attachments": {
"file1": {
"content": "",
"name": "sample.json",
"type": "application/json"
},
"file2": {
"content": ""
"name": "myspreadsheet.xlsx",
"type": "application/vnd.openxmlformats-officedocument.spreadsheetml.sheet"
}
},
我基本上需要一个 Attachment 类,它有一个 AttachmentFile 对象列表,如下所示:
public static AttachmentFile {
String content;
String name;
String type;
}
如何使用自定义解串器实现此目的?
谢谢!
最佳答案
我使用jackson 1.9.12,序列化和反序列化HashMap没有问题。
附件:
import java.util.Map;
public class Attachments
{
//@JsonDeserialize(as=HashMap.class) // use this if you want a HashMap
public Map<String, AttachmentFile> attachments;
public Attachments() {
}
public Attachments(
final Map<String, AttachmentFile> attachments
) {
this.attachments = attachments;
}
}
附件:
public class AttachmentFile
{
public String content;
public String name;
public String type;
public AttachmentFile() {
}
public AttachmentFile(
final String content,
final String name,
final String type
) {
this.content = content;
this.name = name;
this.type = type;
}
}
测试:
import java.util.HashMap;
import java.util.Map;
import org.codehaus.jackson.map.ObjectMapper;
import org.codehaus.jackson.map.SerializationConfig;
import org.junit.Assert;
import org.junit.Test;
public class AttachmentsTest
{
@Test
public void test()
{
try {
final Map<String, AttachmentFile> attachments = new HashMap<String, AttachmentFile>();
attachments.put(
"file1",
new AttachmentFile(
"",
"sample.json",
"application/json"
)
);
attachments.put(
"file2",
new AttachmentFile(
"",
"myspreadsheet.xlsx",
"application/vnd.openxmlformats-officedocument.spreadsheetml.sheet"
)
);
final Attachments inputData = new Attachments();
inputData.attachments = attachments;
final ObjectMapper jsonMapper = new ObjectMapper();
jsonMapper.configure(SerializationConfig.Feature.INDENT_OUTPUT, true);
final String jsonString = jsonMapper.writeValueAsString(inputData);
//System.out.println(jsonString);
final Attachments outputData = jsonMapper.readValue(jsonString, inputData.getClass());
Assert.assertNotNull(outputData);
Assert.assertEquals(inputData.attachments.size(), outputData.attachments.size());
Assert.assertEquals(inputData.attachments.get("file1").name, outputData.attachments.get("file1").name);
Assert.assertEquals(inputData.attachments.get("file2").name, outputData.attachments.get("file2").name);
} catch (final Exception e) {
Assert.fail(e.getMessage());
}
}
}
关于java - Jackson 反序列化自定义对象列表,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/18140418/