javax.ws.rs.ProcessingException:找不到内容类型应用程序/json的编写器 [英] javax.ws.rs.ProcessingException: could not find writer for content-type application/json
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问题描述
我是REST Web服务的新手.我正在尝试如下的@post和@consumes注释
I am new to REST web services. Am trying @post and @consumes annotation as below
@POST
@Path("/post")
@Consumes("application/json")
public Response createProductInJSON(Product product) {
String result = "Product created : " + product;
return Response.status(201).entity(result).build();
}
修改 产品类别
public class Product {
String name;
int qty;
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public int getQty() {
return qty;
}
public void setQty(int qty) {
this.qty = qty;
}
}
现在我想测试一下，所以我正在使用下面的代码进行测试.
Now I want to test this, so am using the below code to test.
Product product=new Product();
product.setName("windows_phone");
product.setQty(4);
ResteasyClient client = new ResteasyClientBuilder().build();
ResteasyWebTarget target = client.target("http://localhost:8080/Rest_Services/practice/service/post");
Response response = target.request().post(Entity.entity(product, "application/json"));
if (response.getStatus() != 200) {
throw new RuntimeException("Failed : HTTP error code : "+ response.getStatus());
}
System.out.println("Server response : \n");
System.out.println(response.readEntity(String.class));
response.close();
执行时出现以下错误.
Am getting the below error when executed.
log4j:WARN No appenders could be found for logger (org.jboss.resteasy.plugins.providers.DocumentProvider).
log4j:WARN Please initialize the log4j system properly.
Exception in thread "main" javax.ws.rs.ProcessingException: Unable to invoke request
at org.jboss.resteasy.client.jaxrs.engines.ApacheHttpClient4Engine.invoke(ApacheHttpClient4Engine.java:287)
Caused by: javax.ws.rs.ProcessingException: could not find writer for content-type application/json type: com.model.Product
at org.jboss.resteasy.core.interception.ClientWriterInterceptorContext.throwWriterNotFoundException(ClientWriterInterceptorContext.java:40)
at org.jboss.resteasy.core.interception.AbstractWriterInterceptorContext.getWriter(AbstractWriterInterceptorContext.java:138)
下面是Jars正在使用的
Below are the Jars am using.
编辑3 POM.XML
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>rest_maven</groupId>
<artifactId>rest_maven</artifactId>
<version>0.0.1-SNAPSHOT</version>
<packaging>war</packaging>
<build>
<sourceDirectory>src</sourceDirectory>
<plugins>
<plugin>
<artifactId>maven-compiler-plugin</artifactId>
<version>3.0</version>
<configuration>
<source>1.7</source>
<target>1.7</target>
</configuration>
</plugin>
<plugin>
<artifactId>maven-war-plugin</artifactId>
<version>2.3</version>
<configuration>
<warSourceDirectory>WebContent</warSourceDirectory>
<failOnMissingWebXml>false</failOnMissingWebXml>
</configuration>
</plugin>
</plugins>
</build>
<dependencies>
<dependency>
<groupId>org.glassfish.jersey.core</groupId>
<artifactId>jersey-server</artifactId>
<version>2.6</version>
</dependency>
<dependency>
<groupId>org.glassfish.jersey.containers</groupId>
<artifactId>jersey-container-servlet-core</artifactId>
<version>2.6</version>
</dependency>
<dependency>
<groupId>org.slf4j</groupId>
<artifactId>slf4j-log4j12</artifactId>
<version>1.5.6</version>
</dependency>
<dependency>
<groupId>com.google.code.gson</groupId>
<artifactId>gson</artifactId>
<version>2.3.1</version>
</dependency>
<dependency>
<groupId>commons-logging</groupId>
<artifactId>commons-logging</artifactId>
<version>1.1.3</version>
</dependency>
<dependency>
<groupId>commons-io</groupId>
<artifactId>commons-io</artifactId>
<version>2.2</version>
</dependency>
<dependency>
<groupId>commons-codec</groupId>
<artifactId>commons-codec</artifactId>
<version>1.9</version>
</dependency>
<dependency>
<groupId>javax.activation</groupId>
<artifactId>activation</artifactId>
<version>1.1.1</version>
</dependency>
<dependency>
<groupId>org.apache.httpcomponents</groupId>
<artifactId>httpclient</artifactId>
<version>4.3.6</version>
</dependency>
<dependency>
<groupId>org.apache.httpcomponents</groupId>
<artifactId>httpcore</artifactId>
<version>4.3.3</version>
</dependency>
<dependency>
<groupId>org.jboss.spec.javax.annotation</groupId>
<artifactId>jboss-annotations-api_1.1_spec</artifactId>
<version>1.0.1.Final</version>
</dependency>
<dependency>
<groupId>net.jcip</groupId>
<artifactId>jcip-annotations</artifactId>
<version>1.0</version>
</dependency>
<dependency>
<groupId>log4j</groupId>
<artifactId>log4j</artifactId>
<version>1.2.14</version>
</dependency>
<dependency>
<groupId>org.glassfish.jersey.media</groupId>
<artifactId>jersey-media-moxy</artifactId>
<version>2.6</version>
</dependency>
<dependency>
<groupId>org.jboss.resteasy</groupId>
<artifactId>resteasy-client</artifactId>
<version>3.0.12.Final</version>
</dependency>
<dependency>
<groupId>org.jboss.resteasy</groupId>
<artifactId>resteasy-jaxrs</artifactId>
<version>3.0.12.Final</version>
</dependency>
<dependency>
<groupId>org.jboss.resteasy</groupId>
<artifactId>jaxrs-api</artifactId>
<version>3.0.12.Final</version>
</dependency>
<dependency>
<groupId>org.jboss.resteasy</groupId>
<artifactId>resteasy-jaxb-provider</artifactId>
<version>3.0.12.Final</version>
</dependency>
<dependency>
<groupId>org.jboss.resteasy</groupId>
<artifactId>resteasy-jackson2-provider</artifactId>
<version>3.0.12.Final</version>
</dependency>
</dependencies>
</project>
settings.xml
<settings>
<localRepository>Z:\PROD_Deploy\mvn\repository</localRepository>
<proxies>
<proxy>
<active>true</active>
<protocol>http</protocol>
<username>xxx</username>
<password>xxx</password>
<host>xxx</host>
<port>80</port>
<nonProxyHosts>local.net|some.host.com</nonProxyHosts>
</proxy>
请帮助我解决此错误. 预先感谢.
Please help me get through this error. Thanks in advance.
推荐答案
因此，在查找JBoss文档之后，我认为我已经找到了您的问题:
So, after looking up on JBoss docs I think I've found your issue:
您正在使用resteasy-client-3.0.4.Final，它取决于resteasy-jaxrs-3.0.4.Final，如
You're using resteasy-client-3.0.4.Final which depends on resteasy-jaxrs-3.0.4.Final, as stated here.
现在问题是，在resteasy-jaxrs-3.0.4.Final上，类CaseInsensitiveMap<V>具有
Now the thing is, on resteasy-jaxrs-3.0.4.Final the class CaseInsensitiveMap<V> has a different hierarchy than the one of resteasy-jaxrs-3.0.12.Final.
我的建议是将resteasy-client升级为版本 3.0.12 .
My suggestion is for you to upgrade your resteasy-client for the version 3.0.12.
编辑
您的pom.xml应包括这些依赖项.验证您没有拥有的那些并更新您的Maven项目:
Your pom.xml should include these dependencies. Validate which ones you don't have and update your Maven project:
<dependency>
<groupId>org.jboss.resteasy</groupId>
<artifactId>resteasy-jaxrs</artifactId>
<version>3.0.12.Final</version>
</dependency>
<dependency>
<groupId>org.jboss.resteasy</groupId>
<artifactId>jaxrs-api</artifactId>
<version>3.0.12.Final</version>
</dependency>
<dependency>
<groupId>org.jboss.resteasy</groupId>
<artifactId>resteasy-jaxb-provider</artifactId>
<version>3.0.12.Final</version>
</dependency>
<dependency>
<groupId>org.jboss.resteasy</groupId>
<artifactId>resteasy-jackson2-provider</artifactId>
<version>3.0.12.Final</version>
</dependency>
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