对于想了解SpringToolSuite-NoClassDefFoundErrorMappingJackson2XmlHttpMessageConverter的读者，本文将提供新的信息，并且为您提供关
对于想了解Spring Tool Suite-NoClassDefFoundError MappingJackson2XmlHttpMessageConverter的读者，本文将提供新的信息，并且为您提供关于Android Spring Jackson Mapping：NoClassDefFoundError、java – Spring REST | MappingJacksonHttpMessageConverter生成无效的JSON、Java-Class-C：org.springframework.http.converter.StringHttpMessageConverter、java.lang.ClassNotFoundException：org.springframework.http.converter.json.MappingJackson2HttpMessageConverter的有价值信息。
本文目录一览：- Spring Tool Suite-NoClassDefFoundError MappingJackson2XmlHttpMessageConverter
- Android Spring Jackson Mapping：NoClassDefFoundError
- java – Spring REST | MappingJacksonHttpMessageConverter生成无效的JSON
- Java-Class-C：org.springframework.http.converter.StringHttpMessageConverter
- java.lang.ClassNotFoundException：org.springframework.http.converter.json.MappingJackson2HttpMessageConverter
Spring Tool Suite-NoClassDefFoundError MappingJackson2XmlHttpMessageConverter
我是Spring的新手，现在开始从他的网站学习它。对我来说，理解Java并不困难，但是我对环境有麻烦。我遵循了使用Spring
Boot来创建新项目的指南，一切进展顺利 https://spring.io/guides/gs/spring-
boot/
现在我想从Spring Tool Suite中运行该项目，但是当我尝试在Pivotal或Tomcat服务器上运行相同的代码时出现此错误。
无法实例化[org.springframework.boot.autoconfigure.web.HttpMessageConverters]：>工厂方法’messageConverters’抛出异常；嵌套的异常是java.lang.NoClassDefFoundError：org
/ springframework / http / converter / xml /
MappingJackson2XmlHttpMessageConverter
Spring开发人员对修复我的工作流程有帮助吗？
答案1
小编典典当您尝试通过服务器运行项目时，请首先使用maven进行构建，以便下载所有依赖项。这也有助于下载MappingJackson2XmlHttpMessageConverter类。构建它之后，将您创建的战争部署到服务器中。
Android Spring Jackson Mapping：NoClassDefFoundError
我试图让我的Android应用程序作为REST客户端.基本上我遵循这个例子：https://github.com/SpringSource/spring-android-samples/tree/master/spring-android-basic-auth/client/src/org/springframework/android/basicauth.
我正在为Android 2.3及更高版本开发.我补充道
spring-android-rest-template-1.0.0.RELEASE.jar
spring-android-auth-1.0.0.RELEASE.jar
spring-android-core-1.0.0.RELEASE.jar and
jackson-mini-1.9.11.jar
到我的构建路径.
无论如何,我总是得到这些错误
11-26 19:01:24.461: E/dalvikvm(15994): Could not find class 'org.codehaus.jackson.map.ObjectMapper', referenced from method org.springframework.http.converter.json.MappingJacksonHttpMessageConverter.<init>
11-26 19:01:24.480: E/AndroidRuntime(15994): java.lang.RuntimeException: An error occured while executing doInBackground()
11-26 19:01:24.480: E/AndroidRuntime(15994): Caused by: java.lang.NoClassDefFoundError: org.codehaus.jackson.map.ObjectMapper
在此代码的第二行：
RestTemplate restTemplate = new RestTemplate();
restTemplate.getMessageConverters().add(new MappingJacksonHttpMessageConverter());
有人可以帮帮我吗？
鸢尾花
解决方法:
如果在运行时期间得到NoClassDefFoundError,那么我怀疑你没有包含.jar文件在运行时工作.您必须选中每个.jar的复选框,如下所示：
java – Spring REST | MappingJacksonHttpMessageConverter生成无效的JSON
我用Spring实现了一个RESTful Web服务.该服务基于Accept标头以XML或JSON响应.这是context.xml映射：
这是我的控制器方法：
@Controller
@RequestMapping(value = "/entityService")
class RestfulEntityService {
@Resource
private EntityService entityService;
@ResponseBody
@RequestMapping(value = "/getAllEntities",method = RequestMethod.GET)
public List
XML响应是有效的,但是,当客户端将Accept标头设置为application / json时,响应是无效的JSON.
这是JSON响应示例：
[{"id":3,"attributes":[{"id":18,"attributeValue":null,"attributeName":"mobile","attributeType":"varchar(40)","entity":{"id":3,"attributes": ..... repeats for a while and then stops..
最佳答案
您使用XStream序列化XML响应,使用Jackson JSON序列化JSON响应.查看您发布的JSON输出,似乎有一个循环引用问题.我猜测实体有一个属性列表,每个属性都指向它们各自的实体. XStream通过使用XPath透明地处理循环引用,这允许在反序列化返回到对象时保留引用.从v1.6开始,Jackson能够处理循环引用,但是你需要通过@JsonManagedReference和@JsonBackReference来注释你的序列化实体来帮助它.我认为杰克逊在允许JSON序列化中的返回引用方面是独一无二的.
请参阅handling bi-directional references using declarative methods的杰克逊文档以供参考.
Java-Class-C：org.springframework.http.converter.StringHttpMessageConverter
| ylbtech-Java-Class-C：org.springframework.http.converter.StringHttpMessageConverter |
1.1、
import org.springframework.http.converter.StringHttpMessageConverter;
1.2、
restTemplate.getMessageConverters ().set (1, new StringHttpMessageConverter (StandardCharsets.UTF_8)); // 防止中文乱码
1.3、
1、
//
// Source code recreated from a .class file by IntelliJ IDEA
// (powered by Fernflower decompiler)
//
package org.springframework.http.converter;
import java.io.IOException;
import java.nio.charset.Charset;
import java.nio.charset.StandardCharsets;
import java.util.ArrayList;
import java.util.List;
import org.springframework.http.HttpHeaders;
import org.springframework.http.HttpInputMessage;
import org.springframework.http.HttpOutputMessage;
import org.springframework.http.MediaType;
import org.springframework.lang.Nullable;
import org.springframework.util.Assert;
import org.springframework.util.StreamUtils;
public class StringHttpMessageConverter extends AbstractHttpMessageConverter<String> {
public static final Charset DEFAULT_CHARSET;
@Nullable
private volatile List<Charset> availableCharsets;
private boolean writeAcceptCharset;
public StringHttpMessageConverter() {
this(DEFAULT_CHARSET);
}
public StringHttpMessageConverter(Charset defaultCharset) {
super(defaultCharset, new MediaType[]{MediaType.TEXT_PLAIN, MediaType.ALL});
this.writeAcceptCharset = true;
}
public void setWriteAcceptCharset(boolean writeAcceptCharset) {
this.writeAcceptCharset = writeAcceptCharset;
}
public boolean supports(Class<?> clazz) {
return String.class == clazz;
}
protected String readInternal(Class<? extends String> clazz, HttpInputMessage inputMessage) throws IOException {
Charset charset = this.getContentTypeCharset(inputMessage.getHeaders().getContentType());
return StreamUtils.copyToString(inputMessage.getBody(), charset);
}
protected Long getContentLength(String str, @Nullable MediaType contentType) {
Charset charset = this.getContentTypeCharset(contentType);
return (long)str.getBytes(charset).length;
}
protected void writeInternal(String str, HttpOutputMessage outputMessage) throws IOException {
HttpHeaders headers = outputMessage.getHeaders();
if (this.writeAcceptCharset && headers.get("Accept-Charset") == null) {
headers.setAcceptCharset(this.getAcceptedCharsets());
}
Charset charset = this.getContentTypeCharset(headers.getContentType());
StreamUtils.copy(str, charset, outputMessage.getBody());
}
protected List<Charset> getAcceptedCharsets() {
List<Charset> charsets = this.availableCharsets;
if (charsets == null) {
charsets = new ArrayList(Charset.availableCharsets().values());
this.availableCharsets = (List)charsets;
}
return (List)charsets;
}
private Charset getContentTypeCharset(@Nullable MediaType contentType) {
if (contentType != null && contentType.getCharset() != null) {
return contentType.getCharset();
} else if (contentType != null && contentType.isCompatibleWith(MediaType.APPLICATION_JSON)) {
return StandardCharsets.UTF_8;
} else {
Charset charset = this.getDefaultCharset();
Assert.state(charset != null, "No default charset");
return charset;
}
}
static {
DEFAULT_CHARSET = StandardCharsets.ISO_8859_1;
}
}
2、
出处：http://ylbtech.cnblogs.com/
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java.lang.ClassNotFoundException：org.springframework.http.converter.json.MappingJackson2HttpMessageConverter
我在项目中使用spring-integration。在码头容器中部署应用程序时，出现以下异常：
org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'integrationRequestMappingHandlerMapping': Initialization of bean failed; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'inboundhttpJobRequestGateway': Instantiation of bean failed; nested exception is org.springframework.beans.BeanInstantiationException: Could not instantiate bean class [org.springframework.integration.http.inbound.HttpRequestHandlingMessagingGateway]: Constructor threw exception; nested exception is java.lang.NoClassDefFoundError: org/springframework/http/converter/json/MappingJackson2HttpMessageConverter
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:527)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:456)
at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:294)
at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:225)
at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:291)
at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:193)
at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:585)
at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:913)
at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:464)
at com.dsths.spring.web.DsthsContextLoaderListener.configureAndRefreshWebApplicationContext(DsthsContextLoaderListener.java:97)
at org.springframework.web.context.ContextLoader.initWebApplicationContext(ContextLoader.java:284)
at org.springframework.web.context.ContextLoaderListener.contextInitialized(ContextLoaderListener.java:111)
at org.eclipse.jetty.server.handler.ContextHandler.callContextInitialized(ContextHandler.java:771)
at org.eclipse.jetty.servlet.ServletContextHandler.callContextInitialized(ServletContextHandler.java:411)
at org.eclipse.jetty.server.handler.ContextHandler.startContext(ContextHandler.java:763)
at org.eclipse.jetty.servlet.ServletContextHandler.startContext(ServletContextHandler.java:247)
at org.eclipse.jetty.webapp.WebAppContext.startContext(WebAppContext.java:1238)
at org.eclipse.jetty.server.handler.ContextHandler.doStart(ContextHandler.java:706)
at org.eclipse.jetty.webapp.WebAppContext.doStart(WebAppContext.java:480)
at org.eclipse.jetty.util.component.AbstractLifeCycle.start(AbstractLifeCycle.java:64)
at com.dsths.common.container.core.deploy.DeploymentManager.deploy(DeploymentManager.java:54)
at com.dsths.common.container.core.deploy.DeploymentManager$$FastClassByCGLIB$$f5bc43eb.invoke(<generated>)
at org.springframework.cglib.proxy.MethodProxy.invoke(MethodProxy.java:204)
at org.springframework.aop.framework.CglibAopProxy$CglibMethodInvocation.invokeJoinpoint(CglibAopProxy.java:698)
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:150)
at org.springframework.aop.interceptor.AsyncExecutionInterceptor$1.call(AsyncExecutionInterceptor.java:95)
at java.util.concurrent.FutureTask.run(FutureTask.java:262)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
at java.lang.Thread.run(Thread.java:724)
Caused by: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'inboundhttpJobRequestGateway': Instantiation of bean failed; nested exception is org.springframework.beans.BeanInstantiationException: Could not instantiate bean class [org.springframework.integration.http.inbound.HttpRequestHandlingMessagingGateway]: Constructor threw exception; nested exception is java.lang.NoClassDefFoundError: org/springframework/http/converter/json/MappingJackson2HttpMessageConverter
at org.springframework.beans.factory.support.ConstructorResolver.autowireConstructor(ConstructorResolver.java:288)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.autowireConstructor(AbstractAutowireCapableBeanFactory.java:1035)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBeanInstance(AbstractAutowireCapableBeanFactory.java:939)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:485)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:456)
at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:294)
at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:225)
at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:291)
at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:193)
at org.springframework.context.support.AbstractApplicationContext.getBean(AbstractApplicationContext.java:1093)
at org.springframework.integration.http.inbound.IntegrationRequestMappingHandlerMapping.detectHandlerMethods(IntegrationRequestMappingHandlerMapping.java:103)
at org.springframework.web.servlet.handler.AbstractHandlerMethodMapping.initHandlerMethods(AbstractHandlerMethodMapping.java:109)
at org.springframework.web.servlet.handler.AbstractHandlerMethodMapping.initApplicationContext(AbstractHandlerMethodMapping.java:89)
at org.springframework.context.support.ApplicationObjectSupport.initApplicationContext(ApplicationObjectSupport.java:119)
at org.springframework.web.context.support.WebApplicationObjectSupport.initApplicationContext(WebApplicationObjectSupport.java:72)
at org.springframework.context.support.ApplicationObjectSupport.setApplicationContext(ApplicationObjectSupport.java:73)
at org.springframework.context.support.ApplicationContextAwareProcessor.invokeAwareInterfaces(ApplicationContextAwareProcessor.java:117)
at org.springframework.context.support.ApplicationContextAwareProcessor.postProcessBeforeInitialization(ApplicationContextAwareProcessor.java:92)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.applyBeanPostProcessorsBeforeInitialization(AbstractAutowireCapableBeanFactory.java:394)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1448)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:519)
... 29 more
Caused by: org.springframework.beans.BeanInstantiationException: Could not instantiate bean class [org.springframework.integration.http.inbound.HttpRequestHandlingMessagingGateway]: Constructor threw exception; nested exception is java.lang.NoClassDefFoundError: org/springframework/http/converter/json/MappingJackson2HttpMessageConverter
at org.springframework.beans.BeanUtils.instantiateClass(BeanUtils.java:162)
at org.springframework.beans.factory.support.SimpleInstantiationStrategy.instantiate(SimpleInstantiationStrategy.java:110)
at org.springframework.beans.factory.support.ConstructorResolver.autowireConstructor(ConstructorResolver.java:280)
... 49 more
Caused by: java.lang.NoClassDefFoundError: org/springframework/http/converter/json/MappingJackson2HttpMessageConverter
at org.springframework.integration.http.inbound.HttpRequestHandlingEndpointSupport.<init>(HttpRequestHandlingEndpointSupport.java:166)
at org.springframework.integration.http.inbound.HttpRequestHandlingMessagingGateway.<init>(HttpRequestHandlingMessagingGateway.java:72)
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:57)
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
at java.lang.reflect.Constructor.newInstance(Constructor.java:526)
at org.springframework.beans.BeanUtils.instantiateClass(BeanUtils.java:147)
... 51 more
Caused by: java.lang.ClassNotFoundException: org.springframework.http.converter.json.MappingJackson2HttpMessageConverter
at java.net.URLClassLoader$1.run(URLClassLoader.java:366)
at java.net.URLClassLoader$1.run(URLClassLoader.java:355)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:354)
at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
at com.dsths.common.container.ContainerClassLoader.loadClass(ContainerClassLoader.java:136)
at org.eclipse.jetty.webapp.WebAppClassLoader.loadClass(WebAppClassLoader.java:429)
at org.eclipse.jetty.webapp.WebAppClassLoader.loadClass(WebAppClassLoader.java:382)
... 58 more
我有两个罐子jackson-core-asl-1.8.3，并jackson-core-2.3.1在类路径中。仍然我得到错误。如何解决问题？
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