在球衣中创建 rest API 时出现 500 内部错误
500 internal error while creating restAPI in jersey
我在 jersey 项目 API 上执行基本程序时遇到 500 内部错误
Student.java
package com.api.api;
import javax.xml.bind.annotation.XmlRootElement;
@XmlRootElement
public class Student {
private String name;
private String subject;
private String marks;
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public String getSubject() {
return subject;
}
public void setSubject(String subject) {
this.subject = subject;
}
public String getMarks() {
return marks;
}
public void setMarks(String marks) {
this.marks = marks;
}
}
StudentResource.java
package com.api.api;
import javax.ws.rs.GET;
import javax.ws.rs.Path;
import javax.ws.rs.Produces;
import javax.ws.rs.core.MediaType;
@Path("student")
public class StudentResource {
@GET
@Produces(MediaType.APPLICATION_XML)
public Student getStudents()
{
System.out.println("called...");
Student s1=new Student();
s1.setMarks("19");
s1.setName("kart");
s1.setSubject("maths");
System.out.println(s1.getMarks());
return s1;
// return "<?xml version=\"1.0\"?>" + "<hello> Hello Jersey" + "</hello>";
}
}
这是我的 pom.xml 文件
<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/maven-v4_0_0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>com.api</groupId>
<artifactId>api</artifactId>
<packaging>war</packaging>
<version>0.0.1-SNAPSHOT</version>
<name>api</name>
<build>
<finalName>api</finalName>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
<version>3.8.1</version>
<inherited>true</inherited>
<configuration>
<source>1.8</source>
<target>1.8</target>
</configuration>
</plugin>
</plugins>
</build>
<dependencyManagement>
<dependencies>
<dependency>
<groupId>org.glassfish.jersey</groupId>
<artifactId>jersey-bom</artifactId>
<version>${jersey.version}</version>
<type>pom</type>
<scope>import</scope>
</dependency>
</dependencies>
</dependencyManagement>
<dependencies>
<dependency>
<groupId>org.glassfish.jersey.containers</groupId>
<artifactId>jersey-container-servlet-core</artifactId>
<!-- use the following artifactId if you don't need servlet 2.x compatibility -->
<!-- artifactId>jersey-container-servlet</artifactId -->
</dependency>
<dependency>
<groupId>org.glassfish.jersey.inject</groupId>
<artifactId>jersey-hk2</artifactId>
</dependency>
<dependency>
<groupId>javax.xml.bind</groupId>
<artifactId>jaxb-api</artifactId>
<version>2.3.1</version>
</dependency>
<!-- uncomment this to get JSON support
<dependency>
<groupId>org.glassfish.jersey.media</groupId>
<artifactId>jersey-media-json-binding</artifactId>
</dependency>
-->
</dependencies>
<properties>
<jersey.version>2.26-b06</jersey.version>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
</properties>
</project>
我在哪里添加了这个依赖
<dependency>
<groupId>javax.xml.bind</groupId>
<artifactId>jaxb-api</artifactId>
<version>2.3.1</version>
</dependency>
这是我得到的输出
我怀疑 XML 绑定存在一些问题，因为当我 return 将 XML 作为字符串时它工作正常但是当我将对象转换为 XML 我遇到内部错误所以请帮我解决这个问题
这是我在eclipse中的文件结构
而且我看不到任何错误日志
根本原因分析
ClassNotFoundException
可能 ClassNotFoundException 是由 org.glassfish.hk2.osgiresourcelocator.ServiceLoader#lookupProviderClasses 方法抛出的。
ClassNotFoundException异常信息：
java.lang.ClassNotFoundException: com.sun.xml.internal.bind.v2.ContextFactory
ClassNotFoundException 异常堆栈跟踪：
java.lang.ClassNotFoundException: com.sun.xml.internal.bind.v2.ContextFactory
at java.base/jdk.internal.loader.BuiltinClassLoader.loadClass(BuiltinClassLoader.java:636)
at java.base/jdk.internal.loader.ClassLoaders$AppClassLoader.loadClass(ClassLoaders.java:182)
at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:519)
at javax.xml.bind.ServiceLoaderUtil.nullSafeLoadClass(ServiceLoaderUtil.java:122)
at javax.xml.bind.ServiceLoaderUtil.safeLoadClass(ServiceLoaderUtil.java:155)
at javax.xml.bind.ContextFinder.newInstance(ContextFinder.java:276)
at javax.xml.bind.ContextFinder.find(ContextFinder.java:421)
at javax.xml.bind.JAXBContext.newInstance(JAXBContext.java:721)
at javax.xml.bind.JAXBContext.newInstance(JAXBContext.java:662)
at org.glassfish.jersey.jaxb.internal.AbstractJaxbProvider.getStoredJaxbContext(AbstractJaxbProvider.java:311)
<…>
JAXBException
上面提到的 ClassNotFoundException 异常被 javax.xml.bind.ContextFinder#newInstance(java.lang.Class[], java.util.Map, java.lang.String) 方法捕获并作为 JAXBException 重新抛出。
JAXBException异常信息：
javax.xml.bind.JAXBException: Implementation of JAXB-API has not been found on module path or classpath.
- with linked exception:
[java.lang.ClassNotFoundException: com.sun.xml.internal.bind.v2.ContextFactory]
JAXBException 异常堆栈跟踪：
javax.xml.bind.JAXBException: Implementation of JAXB-API has not been found on module path or classpath.
- with linked exception:
[java.lang.ClassNotFoundException: com.sun.xml.internal.bind.v2.ContextFactory]
at javax.xml.bind.ContextFinder.newInstance(ContextFinder.java:278)
at javax.xml.bind.ContextFinder.find(ContextFinder.java:421)
at javax.xml.bind.JAXBContext.newInstance(JAXBContext.java:721)
at javax.xml.bind.JAXBContext.newInstance(JAXBContext.java:662)
at org.glassfish.jersey.jaxb.internal.AbstractJaxbProvider.getStoredJaxbContext(AbstractJaxbProvider.java:311)
at org.glassfish.jersey.jaxb.internal.AbstractJaxbProvider.getJAXBContext(AbstractJaxbProvider.java:296)
at org.glassfish.jersey.jaxb.internal.AbstractJaxbProvider.getMarshaller(AbstractJaxbProvider.java:263)
at org.glassfish.jersey.jaxb.internal.AbstractJaxbProvider.getMarshaller(AbstractJaxbProvider.java:230)
at org.glassfish.jersey.jaxb.internal.AbstractRootElementJaxbProvider.writeTo(AbstractRootElementJaxbProvider.java:174)
at org.glassfish.jersey.message.internal.WriterInterceptorExecutor$TerminalWriterInterceptor.invokeWriteTo(WriterInterceptorExecutor.java:266)
<…>
Caused by: java.lang.ClassNotFoundException: com.sun.xml.internal.bind.v2.ContextFactory
at java.base/jdk.internal.loader.BuiltinClassLoader.loadClass(BuiltinClassLoader.java:636)
at java.base/jdk.internal.loader.ClassLoaders$AppClassLoader.loadClass(ClassLoaders.java:182)
at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:519)
<…>
根本原因
JAXBException 异常消息描述了根本原因：
javax.xml.bind.JAXBException: Implementation of JAXB-API has not been found on module path or classpath.
解决方案
添加 JAXB 实现 Maven 依赖项。
例如，这个似乎适用于提到的 JAXB 版本 API:
<dependency>
<groupId>com.sun.xml.bind</groupId>
<artifactId>jaxb-impl</artifactId>
<version>2.3.6</version>
<scope>runtime</scope>
</dependency>
我在 jersey 项目 API 上执行基本程序时遇到 500 内部错误
Student.java
package com.api.api;
import javax.xml.bind.annotation.XmlRootElement;
@XmlRootElement
public class Student {
private String name;
private String subject;
private String marks;
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public String getSubject() {
return subject;
}
public void setSubject(String subject) {
this.subject = subject;
}
public String getMarks() {
return marks;
}
public void setMarks(String marks) {
this.marks = marks;
}
}
StudentResource.java
package com.api.api;
import javax.ws.rs.GET;
import javax.ws.rs.Path;
import javax.ws.rs.Produces;
import javax.ws.rs.core.MediaType;
@Path("student")
public class StudentResource {
@GET
@Produces(MediaType.APPLICATION_XML)
public Student getStudents()
{
System.out.println("called...");
Student s1=new Student();
s1.setMarks("19");
s1.setName("kart");
s1.setSubject("maths");
System.out.println(s1.getMarks());
return s1;
// return "<?xml version=\"1.0\"?>" + "<hello> Hello Jersey" + "</hello>";
}
}
这是我的 pom.xml 文件
<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/maven-v4_0_0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>com.api</groupId>
<artifactId>api</artifactId>
<packaging>war</packaging>
<version>0.0.1-SNAPSHOT</version>
<name>api</name>
<build>
<finalName>api</finalName>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
<version>3.8.1</version>
<inherited>true</inherited>
<configuration>
<source>1.8</source>
<target>1.8</target>
</configuration>
</plugin>
</plugins>
</build>
<dependencyManagement>
<dependencies>
<dependency>
<groupId>org.glassfish.jersey</groupId>
<artifactId>jersey-bom</artifactId>
<version>${jersey.version}</version>
<type>pom</type>
<scope>import</scope>
</dependency>
</dependencies>
</dependencyManagement>
<dependencies>
<dependency>
<groupId>org.glassfish.jersey.containers</groupId>
<artifactId>jersey-container-servlet-core</artifactId>
<!-- use the following artifactId if you don't need servlet 2.x compatibility -->
<!-- artifactId>jersey-container-servlet</artifactId -->
</dependency>
<dependency>
<groupId>org.glassfish.jersey.inject</groupId>
<artifactId>jersey-hk2</artifactId>
</dependency>
<dependency>
<groupId>javax.xml.bind</groupId>
<artifactId>jaxb-api</artifactId>
<version>2.3.1</version>
</dependency>
<!-- uncomment this to get JSON support
<dependency>
<groupId>org.glassfish.jersey.media</groupId>
<artifactId>jersey-media-json-binding</artifactId>
</dependency>
-->
</dependencies>
<properties>
<jersey.version>2.26-b06</jersey.version>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
</properties>
</project>
我在哪里添加了这个依赖
<dependency>
<groupId>javax.xml.bind</groupId>
<artifactId>jaxb-api</artifactId>
<version>2.3.1</version>
</dependency>
这是我得到的输出
我怀疑 XML 绑定存在一些问题，因为当我 return 将 XML 作为字符串时它工作正常但是当我将对象转换为 XML 我遇到内部错误所以请帮我解决这个问题
这是我在eclipse中的文件结构
而且我看不到任何错误日志
根本原因分析
ClassNotFoundException
可能 ClassNotFoundException 是由 org.glassfish.hk2.osgiresourcelocator.ServiceLoader#lookupProviderClasses 方法抛出的。
ClassNotFoundException异常信息：
java.lang.ClassNotFoundException: com.sun.xml.internal.bind.v2.ContextFactory
ClassNotFoundException 异常堆栈跟踪：
java.lang.ClassNotFoundException: com.sun.xml.internal.bind.v2.ContextFactory
at java.base/jdk.internal.loader.BuiltinClassLoader.loadClass(BuiltinClassLoader.java:636)
at java.base/jdk.internal.loader.ClassLoaders$AppClassLoader.loadClass(ClassLoaders.java:182)
at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:519)
at javax.xml.bind.ServiceLoaderUtil.nullSafeLoadClass(ServiceLoaderUtil.java:122)
at javax.xml.bind.ServiceLoaderUtil.safeLoadClass(ServiceLoaderUtil.java:155)
at javax.xml.bind.ContextFinder.newInstance(ContextFinder.java:276)
at javax.xml.bind.ContextFinder.find(ContextFinder.java:421)
at javax.xml.bind.JAXBContext.newInstance(JAXBContext.java:721)
at javax.xml.bind.JAXBContext.newInstance(JAXBContext.java:662)
at org.glassfish.jersey.jaxb.internal.AbstractJaxbProvider.getStoredJaxbContext(AbstractJaxbProvider.java:311)
<…>
JAXBException
上面提到的 ClassNotFoundException 异常被 javax.xml.bind.ContextFinder#newInstance(java.lang.Class[], java.util.Map, java.lang.String) 方法捕获并作为 JAXBException 重新抛出。
JAXBException异常信息：
javax.xml.bind.JAXBException: Implementation of JAXB-API has not been found on module path or classpath.
- with linked exception: [java.lang.ClassNotFoundException: com.sun.xml.internal.bind.v2.ContextFactory]
JAXBException 异常堆栈跟踪：
javax.xml.bind.JAXBException: Implementation of JAXB-API has not been found on module path or classpath.
- with linked exception:
[java.lang.ClassNotFoundException: com.sun.xml.internal.bind.v2.ContextFactory]
at javax.xml.bind.ContextFinder.newInstance(ContextFinder.java:278)
at javax.xml.bind.ContextFinder.find(ContextFinder.java:421)
at javax.xml.bind.JAXBContext.newInstance(JAXBContext.java:721)
at javax.xml.bind.JAXBContext.newInstance(JAXBContext.java:662)
at org.glassfish.jersey.jaxb.internal.AbstractJaxbProvider.getStoredJaxbContext(AbstractJaxbProvider.java:311)
at org.glassfish.jersey.jaxb.internal.AbstractJaxbProvider.getJAXBContext(AbstractJaxbProvider.java:296)
at org.glassfish.jersey.jaxb.internal.AbstractJaxbProvider.getMarshaller(AbstractJaxbProvider.java:263)
at org.glassfish.jersey.jaxb.internal.AbstractJaxbProvider.getMarshaller(AbstractJaxbProvider.java:230)
at org.glassfish.jersey.jaxb.internal.AbstractRootElementJaxbProvider.writeTo(AbstractRootElementJaxbProvider.java:174)
at org.glassfish.jersey.message.internal.WriterInterceptorExecutor$TerminalWriterInterceptor.invokeWriteTo(WriterInterceptorExecutor.java:266)
<…>
Caused by: java.lang.ClassNotFoundException: com.sun.xml.internal.bind.v2.ContextFactory
at java.base/jdk.internal.loader.BuiltinClassLoader.loadClass(BuiltinClassLoader.java:636)
at java.base/jdk.internal.loader.ClassLoaders$AppClassLoader.loadClass(ClassLoaders.java:182)
at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:519)
<…>
根本原因
JAXBException 异常消息描述了根本原因：
javax.xml.bind.JAXBException: Implementation of JAXB-API has not been found on module path or classpath.
解决方案
添加 JAXB 实现 Maven 依赖项。
例如，这个似乎适用于提到的 JAXB 版本 API:
<dependency>
<groupId>com.sun.xml.bind</groupId>
<artifactId>jaxb-impl</artifactId>
<version>2.3.6</version>
<scope>runtime</scope>
</dependency>