Jersey：JSON 对象列表
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Jersey: list of JSON objects
提问by Dejell
I am trying to retrieve in my Jersey implementation resource class post collection of objects like this:
我试图在我的 Jersey 实现资源类中检索像这样的对象集合：
@POST
@Path("/send")
@Consumes({ MediaType.APPLICATION_JSON })
@Produces({ MediaType.APPLICATION_JSON })
public String sendEmails(ArrayList<AnyEmail> email) {
//emailManager.sendEmail(email);
return "success";
}
I have the @XmlRootElementabove `AnyEmail.
我有@XmlRootElement上面的`AnyEmail。
However when I post like this with REST client tool:
但是，当我使用 REST 客户端工具发布这样的帖子时：
emails : [
{"body": "Testing the web service", "header": "Hi", "footer": "<br/>test"},
{"body": "Testing the web service", "header": "Hi", "footer": "<br/>test"}
]
I get:
我得到：
<html><head><title>Apache Tomcat/7.0.22 - Error report</title><style><!--H1 {font-family:Tahoma,Arial,sans-serif;color:white;background-color:#525D76;font-size:22px;} H2 {font-family:Tahoma,Arial,sans-serif;color:white;background-color:#525D76;font-size:16px;} H3 {font-family:Tahoma,Arial,sans-serif;color:white;background-color:#525D76;font-size:14px;} BODY {font-family:Tahoma,Arial,sans-serif;color:black;background-color:white;} B {font-family:Tahoma,Arial,sans-serif;color:white;background-color:#525D76;} P {font-family:Tahoma,Arial,sans-serif;background:white;color:black;font-size:12px;}A {color : black;}A.name {color : black;}HR {color : #525D76;}--></style> </head><body><h1>HTTP Status 500 - </h1><HR size="1" noshade="noshade"><p><b>type</b> Exception report</p><p><b>message</b> <u></u></p><p><b>description</b> <u>The server encountered an internal error () that prevented it from fulfilling this request.</u></p><p><b>exception</b> <pre>javax.servlet.ServletException: Servlet execution threw an exception
</pre></p><p><b>root cause</b> <pre>java.lang.Error: Error: could not match input
com.sun.jersey.json.impl.reader.JsonLexer.zzScanError(JsonLexer.java:491)
com.sun.jersey.json.impl.reader.JsonLexer.yylex(JsonLexer.java:736)
EDITED
Now I tried:
编辑
现在我试过：
"emails" : [
{"body": "Testing the web service", "header": "Hi", "footer": "<br/>test"},
{"body": "Testing the web service", "header": "Hi", "footer": "<br/>test"}
]
and I get:
我得到：
SEVERE: Servlet.service() for servlet [Jersey Web Application] in context with path [/API] threw exception
java.lang.ArrayIndexOutOfBoundsException: -1
at java.util.ArrayList.get(ArrayList.java:324)
at com.sun.jersey.json.impl.reader.JsonXmlStreamReader.valueRead(JsonXmlStreamReader.java:165)
at com.sun.jersey.json.impl.reader.JsonXmlStreamReader.readNext(JsonXmlStreamReader.java:330)
采纳答案by Martin Matula
This is what should work:
这是应该的工作：
{
"anyEmail" : [
{"body": "Testing the web service", "header": "Hi", "footer": "<br/>test"},
{"body": "Testing the web service", "header": "Hi", "footer": "<br/>test"}
]
}
Also, you may want to use the POJO approach, which is the preferred one for JSON - see here: https://jersey.java.net/documentation/1.18/json.html
此外，您可能希望使用 POJO 方法，这是 JSON 的首选方法 - 请参阅此处：https: //jersey.java.net/documentation/1.18/json.html
The JSON support based on JAXB has various issues with some edge cases, since there isn't a 1:1 mapping between XML (JAXB as designed for) and JSON.
基于 JAXB 的 JSON 支持在某些边缘情况下存在各种问题，因为 XML（专为 JAXB 设计）和 JSON 之间没有 1:1 的映射。
回答by Martin
Why you don't use a simple Java array???
为什么不使用简单的 Java 数组？？？
[
{"body": "Testing the web service", "header": "Hi", "footer": "<br/>test"},
{"body": "Testing the web service", "header": "Hi", "footer": "<br/>test"}
]
And then the following method:
然后是以下方法：
@POST
@Path("/send")
@Consumes({ MediaType.APPLICATION_JSON })
@Produces({ MediaType.APPLICATION_JSON })
public String sendEmails(AnyEmail[] emails) {
//emailManager.sendEmail(emails);
return "success";
}
That should do the trick...
这应该够了吧...
回答by SCO
I'm neither a Jersey nor Json expert, but did you try using a full JSON object, ie :
我既不是 Jersey 也不是 Json 专家，但是您是否尝试使用完整的 JSON 对象，即：
{
"emails" : [
{"body": "Testing the web service", "header": "Hi", "footer": "<br/>test"},
{"body": "Testing the web service", "header": "Hi", "footer": "<br/>test"}
]
}
(added braces, and quotes to emails).
（在电子邮件中添加了大括号和引号）。
回答by Bagbyte
I had the same problem. You have to wrap the AnyEmail class.
我有同样的问题。您必须包装 AnyEmail 类。
This can help you: https://blogs.oracle.com/japod/entry/missing_brackets_at_json_one
这可以帮助您：https: //blogs.oracle.com/japod/entry/missing_brackets_at_json_one
回答by borchvm
// Client
// 客户
package com.project.rest.model;
import java.util.HashSet;
import java.util.Set;
public class Client {
private Long id;
private String email;
private String lang;
public Client() {
}
public Client(Long id) {
this.id = id;
}
public Client(Long id, String email, String lang) {
this.id = id;
this.email = email;
this.lang = lang;
}
public Long getId() {
return id;
}
public void setId(Long id) {
this.id = id;
}
public String getEmail() {
return email;
}
public void setEmail(String email) {
this.email = email;
}
public String getLang() {
return lang;
}
public void setLang(String lang) {
this.lang = lang;
}
@Override
public String toString() {
return "Client [id=" + id + ", email=" + email + ", lang=" + lang + "]";
}
}
//ClientService
//客户服务
package com.project.rest;
import java.util.List;
import javax.ws.rs.Consumes;
import javax.ws.rs.GET;
import javax.ws.rs.POST;
import javax.ws.rs.Path;
import javax.ws.rs.PathParam;
import javax.ws.rs.Produces;
import javax.ws.rs.core.MediaType;
import javax.ws.rs.core.Response;
import com.project.rest.model.Client;
@Path("/client")
public class ClientService {
@POST
@Path("/sendList")
@Consumes(MediaType.APPLICATION_JSON)
@Produces(MediaType.APPLICATION_JSON)
public Response consumeJSONList(List<Client> clientList) {
String output = "consumeJSONList Client : " + clientList.toString() + "\n\n";
return Response.status(200).entity(output).build();
}
}
//JerseyClient
//球衣客户端
package com.project.rest;
import java.util.ArrayList;
import java.util.List;
import javax.ws.rs.core.MediaType;
import com.project.rest.model.Client;
import com.project.rest.model.Device;
import com.sun.jersey.api.client.ClientResponse;
import com.sun.jersey.api.client.WebResource;
import com.sun.jersey.api.client.config.ClientConfig;
import com.sun.jersey.api.client.config.DefaultClientConfig;
import com.sun.jersey.api.json.JSONConfiguration;
public class JerseyClient {
public static void main(String[] args) {
try {
List<Client> clientList = new ArrayList<Client>();
clientList.add(new Client(1L, "[email protected]", "es"));
clientList.add(new Client(2L, "[email protected]", "es"));
clientList.add(new Client(3L, "[email protected]", "es"));
ClientConfig clientConfig = new DefaultClientConfig();
clientConfig.getFeatures().put(JSONConfiguration.FEATURE_POJO_MAPPING, Boolean.TRUE);
com.sun.jersey.api.client.Client c = com.sun.jersey.api.client.Client.create(clientConfig);
WebResource webResource = c.resource("http://localhost:8080/project_rest/rest/client/sendList");
ClientResponse response = webResource.accept("application/json").type("application/json").post(ClientResponse.class, clientList);
if (response.getStatus() != 200) {
throw new RuntimeException("Failed sendClientList: HTTP error code : " + response.getStatus());
}
String output = response.getEntity(String.class);
System.out.println("sendClientList... Server response .... \n");
System.out.println(output);
} catch (Exception e) {
e.printStackTrace();
}
}
}
//POM.xml
//POM.xml
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>4.8.2</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>com.sun.jersey</groupId>
<artifactId>jersey-bundle</artifactId>
<version>1.10-b01</version>
</dependency>
<dependency>
<groupId>com.sun.jersey</groupId>
<artifactId>jersey-server</artifactId>
<version>1.17.1</version>
</dependency>
<dependency>
<groupId>com.sun.jersey</groupId>
<artifactId>jersey-core</artifactId>
<version>1.17.1</version>
</dependency>
<dependency>
<groupId>com.sun.jersey</groupId>
<artifactId>jersey-servlet</artifactId>
<version>1.17.1</version>
</dependency>
<dependency>
<groupId>com.sun.jersey</groupId>
<artifactId>jersey-json</artifactId>
<version>1.18.1</version>
</dependency>
<dependency>
<groupId>com.owlike</groupId>
<artifactId>genson</artifactId>
<version>0.99</version>
</dependency>
回答by Pratap Singh
I am using Jersey 1.17 and can receive list of JSON objects with the following signature and cast them into list of my POJO Objects with Google's gson library, without any issue. Using wrapper to wrap list of POJO objects, is certainly un-natural and not favourable.
我正在使用 Jersey 1.17，可以接收具有以下签名的 JSON 对象列表，并使用 Google 的 gson 库将它们投射到我的 POJO 对象列表中，没有任何问题。使用 wrapper 来包装 POJO 对象列表，当然是不自然的，也不利于。
@POST
@Consumes(MediaType.APPLICATION_JSON)
@Produces({"application/x-javascript", MediaType.APPLICATION_JSON})
public Response doSomething(@Context HttpServletRequest httpServletRequest, JSONArray listOfJSONObjects) {
Gson gson = new GsonBuilder().create();
List < MYPOJOClass > myPojoObjectList = gson.fromJson(listOfJSONObjects.toString(), new TypeToken < List < MYPOJOClass >> () {}.getType());
