Jersey：JSON对象列表

时间：2011-10-04 13:40:22

标签： json rest jersey

我正在尝试在我的Jersey实现资源类中检索这样的对象集合：

@POST
@Path("/send")
@Consumes({ MediaType.APPLICATION_JSON })
@Produces({ MediaType.APPLICATION_JSON })
public String sendEmails(ArrayList<AnyEmail> email) {
    //emailManager.sendEmail(email);
    return "success";
}

我有@XmlRootElement以上的'AnyEmail。

但是，当我使用REST客户端工具发布这样的内容时：

 emails : [
       {"body": "Testing the web service", "header": "Hi", "footer": "<br/>test"},
       {"body": "Testing the web service", "header": "Hi", "footer": "<br/>test"}
      ]

我明白了：

<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
现在我试过了：

 "emails" : [
           {"body": "Testing the web service", "header": "Hi", "footer": "<br/>test"},
           {"body": "Testing the web service", "header": "Hi", "footer": "<br/>test"}
          ]

我得到了：

    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)

6 个答案:

答案 0 :(得分：7)

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"}
]

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";
}

应该这样做......

答案 1 :(得分：4)

这应该是有用的：

{
"anyEmail" : [
       {"body": "Testing the web service", "header": "Hi", "footer": "<br/>test"},
       {"body": "Testing the web service", "header": "Hi", "footer": "<br/>test"}
       ]
}

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

基于JAXB的JSON支持在一些边缘情况下存在各种问题，因为XML（JAXB设计用于）和JSON之间没有1：1的映射。

答案 2 :(得分：1)

我既不是泽西也不是Json专家，但你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"}
      ]
}

（添加大括号和电子邮件的引号）。

答案 3 :(得分：0)

我遇到了同样的问题。你必须包装AnyEmail类。

这可以帮助您：https://blogs.oracle.com/japod/entry/missing_brackets_at_json_one

答案 4 :(得分：0)

//客户端

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 

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 

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, "pruebas@pruebas.com", "es"));
    clientList.add(new Client(2L, "pruebas@pruebas.com", "es"));
    clientList.add(new Client(3L, "pruebas@pruebas.com", "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的

<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>

答案 5 :(得分：0)

我正在使用Jersey 1.17并且可以接收带有以下签名的JSON对象列表，并使用Google的gson库将它们转换为我的POJO对象列表，没有任何问题。使用包装器来包装POJO对象列表，肯定是不自然的，也不是有利的。

   @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());
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