在Resteasy中找不到媒体类型为: java.util.ArrayList的响应对象的文本
在Resteasy中找不到媒体类型为: java.util.ArrayList的响应对象的文本
提问于 2016-03-31 02:36:15
我正在开发RESTEasy示例。在这个例子中，我使用了所有最新的依赖项，并部署了om tomcat8.x版本。我可以成功地部署应用程序，但是当我启动url：http://localhost:8080/RESTfulExample/rest/restwebservice/list时，我看到以下错误即将到来。请指导一下这里出了什么问题。
org.jboss.resteasy.core.NoMessageBodyWriterFoundFailure: Could not find MessageBodyWriter for response object of type: java.util.ArrayList of media type: text/html
at org.jboss.resteasy.core.ServerResponseWriter.writeNomapResponse(ServerResponseWriter.java:66)
at org.jboss.resteasy.core.SynchronousDispatcher.writeResponse(SynchronousDispatcher.java:466)
at org.jboss.resteasy.core.SynchronousDispatcher.invoke(SynchronousDispatcher.java:415)
at org.jboss.resteasy.core.SynchronousDispatcher.invoke(SynchronousDispatcher.java:202)
at org.jboss.resteasy.plugins.server.servlet.ServletContainerDispatcher.service(ServletContainerDispatcher.java:221)
at org.jboss.resteasy.plugins.server.servlet.HttpServletDispatcher.service(HttpServletDispatcher.java:56)
at org.jboss.resteasy.plugins.server.servlet.HttpServletDispatcher.service(HttpServletDispatcher.java:51)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:729)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:291)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:239)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:212)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:106)
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:502)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:141)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:79)
at org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:616)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:88)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:521)
at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1096)
at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:674)
at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1500)
at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.run(NioEndpoint.java:1456)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
at java.lang.Thread.run(Thread.java:745)我到目前为止开发的代码供参考: pom.xml
<repositories>
<repository>
<id>JBoss repository</id>
<url>https://repository.jboss.org/nexus/content/groups/public-jboss/</url>
</repository>
</repositories>
<properties>
<java.version>1.8</java.version>
<resteasy-jaxrs-version>3.0.16.Final</resteasy-jaxrs-version>
<junit.version>4.12</junit.version>
</properties>
<dependencies>
<dependency>
<groupId>org.jboss.resteasy</groupId>
<artifactId>resteasy-jaxrs</artifactId>
<version>${resteasy-jaxrs-version}</version>
</dependency>
<dependency>
<groupId>org.jboss.resteasy</groupId>
<artifactId>resteasy-servlet-initializer</artifactId>
<version>${resteasy-jaxrs-version}</version>
</dependency>
<dependency>
<groupId>com.sun.xml.bind</groupId>
<artifactId>jaxb-impl</artifactId>
<version>2.2.11</version>
</dependency>
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>${junit.version}</version>
<scope>test</scope>
</dependency>
</dependencies>
<!-- Project Build -->
<build>
<finalName>RESTfulExample</finalName>
<plugins>
<plugin>
<artifactId>maven-compiler-plugin</artifactId>
<configuration>
<source>${java.version}</source>
<target>${java.version}</target>
</configuration>
</plugin>
</plugins>
</build>Student.java
@XmlRootElement
public class Student {
private int student_id;
private String student_name;
private String student_rollnumber;
// setters and getters
}RESTEasyService.java
@ApplicationPath("/rest")
public class RESTEasyService extends Application{
}RESTWebServiceJavaExample.java
@Path("/restwebservice")
public class RESTWebServiceJavaExample {
private TreeMap<Integer, Student> webserviceMap= new TreeMap<>();
public RESTWebServiceJavaExample(){
Student student = new Student();
student.setStudent_name("Ricky");
student.setStudent_rollnumber("AOHP451");
addStudent(student);
student = new Student();
student.setStudent_name("Mayer");
student.setStudent_rollnumber("DKLP987");
addStudent(student);
}
@GET
@Path("list")
public List<Student> getStudents() {
List<Student> students = new ArrayList<Student>();
students.addAll(webserviceMap.values());
return students;
}
@POST
@Path("add")
@Produces("text/plain")
@Consumes("application/xml")
public void addStudent(Student student_param) {
int id = webserviceMap.size();
student_param.setStudent_id(id);
webserviceMap.put(id, student_param);
}
}web.xml：
<web-app id="WebApp_ID" version="2.4"
xmlns="http://java.sun.com/xml/ns/j2ee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee
http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd">
<display-name>Restful Web Application</display-name>
</web-app>回答 7
Stack Overflow用户
回答已采纳
发布于 2016-03-31 03:03:52
现在我可以解决这个问题了。我需要在pom.xml中添加以下依赖项
<dependency>
<groupId>org.jboss.resteasy</groupId>
<artifactId>resteasy-jaxb-provider</artifactId>
<version>3.0.16.Final</version>
</dependency>和1)我应该在方法签名上使用@Produces(MediaType.APPLICATION_XML)来获得以下响应。
<collection>
<student>
<student_id>0</student_id>
<student_name>Ricky</student_name>
<student_rollnumber>AOHP451</student_rollnumber>
</student>
<student>
<student_id>1</student_id>
<student_name>Mayer</student_name>
<student_rollnumber>DKLP987</student_rollnumber>
</student>
</collection>，
- ，如果你想使用
@Produces(MediaType.TEXT_PLAIN)，那么代码会给出以下输出，这看起来没有什么用处。
com.mkyong.rest.Student@7715574d，com.mkyong.rest.Student@4d5fd75e
所以使用1)解决方案。
Stack Overflow用户
发布于 2019-06-19 04:50:24
(对于那些发现问题的人，请使用quarkus)
使用此设置例程：
mvn io.quarkus:quarkus-maven-plugin:0.16.1:create -DprojectGroupId=com.sample -DprojectArtifactId=hello-quarkus -DclassName="com.sample.DemoEndpoint" -Dpath="/persons"为了解决这里描述的问题，我必须添加这个依赖项。
<dependency>
<groupId>io.quarkus</groupId>
<artifactId>quarkus-resteasy-jsonb</artifactId>
</dependency>这是我添加上述依赖项后的完整pom.xml。同样，下面99%的pom.xml来自上面的mvn命令。
<?xml version="1.0"?>
<project xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd" xmlns="http://maven.apache.org/POM/4.0.0"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
<modelVersion>4.0.0</modelVersion>
<groupId>com.sample</groupId>
<artifactId>hello-quarkus</artifactId>
<version>1.0-SNAPSHOT</version>
<properties>
<project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
<surefire-plugin.version>2.22.0</surefire-plugin.version>
<quarkus.version>0.16.1</quarkus.version>
<maven.compiler.source>1.8</maven.compiler.source>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<maven.compiler.target>1.8</maven.compiler.target>
</properties>
<dependencyManagement>
<dependencies>
<dependency>
<groupId>io.quarkus</groupId>
<artifactId>quarkus-bom</artifactId>
<version>${quarkus.version}</version>
<type>pom</type>
<scope>import</scope>
</dependency>
</dependencies>
</dependencyManagement>
<dependencies>
<dependency>
<groupId>io.quarkus</groupId>
<artifactId>quarkus-resteasy</artifactId>
</dependency>
<!-- ADDED MAGIC HERE -->
<dependency>
<groupId>io.quarkus</groupId>
<artifactId>quarkus-resteasy-jsonb</artifactId>
</dependency>
<dependency>
<groupId>io.quarkus</groupId>
<artifactId>quarkus-junit5</artifactId>
<scope>test</scope>
</dependency>
<dependency>
<groupId>io.rest-assured</groupId>
<artifactId>rest-assured</artifactId>
<scope>test</scope>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>io.quarkus</groupId>
<artifactId>quarkus-maven-plugin</artifactId>
<version>${quarkus.version}</version>
<executions>
<execution>
<goals>
<goal>build</goal>
</goals>
</execution>
</executions>
</plugin>
<plugin>
<artifactId>maven-surefire-plugin</artifactId>
<version>${surefire-plugin.version}</version>
<configuration>
<systemProperties>
<java.util.logging.manager>org.jboss.logmanager.LogManager</java.util.logging.manager>
</systemProperties>
</configuration>
</plugin>
</plugins>
</build>
<profiles>
<profile>
<id>native</id>
<activation>
<property>
<name>native</name>
</property>
</activation>
<build>
<plugins>
<plugin>
<groupId>io.quarkus</groupId>
<artifactId>quarkus-maven-plugin</artifactId>
<version>${quarkus.version}</version>
<executions>
<execution>
<goals>
<goal>native-image</goal>
</goals>
<configuration>
<enableHttpUrlHandler>true</enableHttpUrlHandler>
</configuration>
</execution>
</executions>
</plugin>
<plugin>
<artifactId>maven-failsafe-plugin</artifactId>
<version>${surefire-plugin.version}</version>
<executions>
<execution>
<goals>
<goal>integration-test</goal>
<goal>verify</goal>
</goals>
<configuration>
<systemProperties>
<native.image.path>${project.build.directory}/${project.build.finalName}-runner</native.image.path>
</systemProperties>
</configuration>
</execution>
</executions>
</plugin>
</plugins>
</build>
</profile>
</profiles>
</project>Stack Overflow用户
发布于 2016-10-25 02:52:44
尝试添加特定版本的序列化程序
<dependency>
<groupId>org.jboss.resteasy</groupId>
<artifactId>resteasy-jackson-provider</artifactId>
<version>${resteasy.version}</version>
</dependency>页面原文内容由Stack Overflow提供。腾讯云小微IT领域专用引擎提供翻译支持
原文链接：
https://stackoverflow.com/questions/36317022
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