Java ClassNotFoundException: org.springframework.http.converter.json.MappingJacksonHttpMessageConverter
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ClassNotFoundException: org.springframework.http.converter.json.MappingHymansonHttpMessageConverter
提问by Viktor
I am completely a beginner at Spring (you can see that in my code :) ). I just wanted to test the class RestTemplate but I got a ClassNotFoundException.
So the code is:
我完全是 Spring 的初学者（您可以在我的代码中看到这一点:)）。我只是想测试 RestTemplate 类，但我得到了一个ClassNotFoundException.
所以代码是：
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;
import org.springframework.web.client.RestTemplate;
public class RestClient {
private RestTemplate restTemplate;
public String getJiraIssueAsJson(){
Object o = restTemplate.getForObject(..., Object.class);
System.out.println("..."+o.getClass());
return null;
}
public void setRestTemplate(RestTemplate restTemplate) {
this.restTemplate = restTemplate;
}
public static void main(String[] args) {
ApplicationContext context = new ClassPathXmlApplicationContext("rest-client-context.xml");
RestClient restClient = context.getBean("restClient", RestClient.class);
restClient.getJiraIssueAsJson();
}
}
context.xml
上下文.xml
<beans ...>
<bean id="restTemplate" class="org.springframework.web.client.RestTemplate">
<property name="messageConverters">
<list>
<bean class="org.springframework.http.converter.json.MappingHymansonHttpMessageConverte????r"/>
</list>
</property>
</bean>
<bean id="restClient" class="org.googlecode.happymarvin.jiraexplorer.RestClient">
<property name="restTemplate" ref="restTemplate"/>
</bean>
</beans>
pom.xml
pom.xml
<project ...>
<modelVersion>4.0.0</modelVersion>
<parent>
<groupId>com.googlecode.happymarvin</groupId>
<artifactId>parent</artifactId>
<version>1.0-SNAPSHOT</version>
</parent>
<artifactId>jiraminer</artifactId>
<name>Happy Marvin JIRA Miner</name>
<packaging>jar</packaging>
<url>http://maven.apache.org</url>
<properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<Hymanson-version>1.9.13</Hymanson-version>
</properties>
</project>
parent pom.xml
父 pom.xml
<project ...>
<modelVersion>4.0.0</modelVersion>
<groupId>com.googlecode.happymarvin</groupId>
<artifactId>parent</artifactId>
<version>1.0-SNAPSHOT</version>
<packaging>pom</packaging>
<name>Happy Marvin parent project</name>
<url>http://maven.apache.org</url>
<properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<org.springframework.version>4.0.0.RELEASE</org.springframework.version>
</properties>
<dependencies>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-core</artifactId>
<version>${org.springframework.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-web</artifactId>
<version>${org.springframework.version}</version>
</dependency>
</dependencies>
</project>
Exception
例外
Jan 07, 2014 10:18:24 AM org.springframework.context.support.AbstractApplicationContext prepareRefresh
INFO: Refreshing org.springframework.context.support.ClassPathXmlApplicationContext@730eb2f0: startup date [Tue Jan 07 10:18:24 GMT 2014]; root of context hierarchy
Jan 07, 2014 10:18:24 AM org.springframework.beans.factory.xml.XmlBeanDefinitionReader loadBeanDefinitions
INFO: Loading XML bean definitions from class path resource [rest-client-context.xml]
Exception in thread "main" org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'restTemplate' defined in class path resource [rest-client-context.xml]: Cannot create inner bean 'org.springframework.http.converter.json.MappingHymansonHttpMessageConverte????r#77624896' of type [org.springframework.http.converter.json.MappingHymansonHttpMessageConverte????r] while setting bean property 'messageConverters' with key [0]; nested exception is org.springframework.beans.factory.CannotLoadBeanClassException: Cannot find class [org.springframework.http.converter.json.MappingHymansonHttpMessageConverte????r] for bean with name 'org.springframework.http.converter.json.MappingHymansonHttpMessageConverte????r#77624896' defined in class path resource [rest-client-context.xml]; nested exception is java.lang.ClassNotFoundException: org.springframework.http.converter.json.MappingHymansonHttpMessageConverte????r
...
Caused by: java.lang.ClassNotFoundException: org.springframework.http.converter.json.MappingHymansonHttpMessageConverte????r
I have this exception when I try to run the main method from eclipse.
I can think of something like the spring jars cannot be seen but I don't know why...
Can you please help me?
当我尝试从 eclipse 运行 main 方法时，出现此异常。
我可以想到无法看到弹簧罐之类的东西，但我不知道为什么......你能帮我吗？
采纳答案by mzzzzb
i tried to copy paste your spring beans to a project but something strange is wrong with
我试图将你的 spring beans 复制粘贴到一个项目中，但出现了一些奇怪的问题
<bean class="org.springframework.http.converter.json.MappingHymansonHttpMessageConverte????r"/>
<bean class="org.springframework.http.converter.json.MappingHymansonHttpMessageConverte????r"/>
this line, specifically there seems to be some invisible characters before the last rin Convertertry typing that classname again manually.
这一行，特别是r在Converter尝试再次手动输入该类名时，在最后一行之前似乎有一些不可见的字符。
if this is the case then its the craziest thing i have seen for sometime :D
如果是这种情况，那么它是我一段时间以来见过的最疯狂的事情：D
Also MappingHymansonHttpMessageConverteris deprecated in 4.0.0 there is something newer. And you will need to add dependencies for Hymanson as well to get things working. Thisshould be helpful.
MappingHymansonHttpMessageConverter在 4.0.0 中也已弃用，还有一些更新。并且您还需要为 Hymanson 添加依赖项以使其正常工作。这应该会有所帮助。
回答by Wins
You need to add the following to your pom.xml (not parent pom.xml)
您需要将以下内容添加到您的 pom.xml（不是父 pom.xml）
<dependencies>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-web</artifactId>
</dependency>
</dependencies>
回答by James McShane
The first major version of Hymanson is no longer supported in Spring 4. The class you want to use is now
org.springframework.http.converter.json.MappingHymanson2HttpMessageConverter. Make sure that you have com.fasterxml.Hymanson.core/Hymanson-core/2.x.x on your classpath.
Spring 4 不再支持 Hymanson 的第一个主要版本。您要使用的类现在是
org.springframework.http.converter.json.MappingHymanson2HttpMessageConverter. 确保您的类路径上有 com.fasterxml.Hymanson.core/Hymanson-core/2.xx。
回答by Picrochole
Programmaticaly you can do your configuration like this:
以编程方式，您可以像这样进行配置：
public class AppConfiguration {
...
@Bean
public HttpMessageConverters customConverters() {
HttpMessageConverter<?> HymansonMessageConverter = new MappingHymanson2HttpMessageConverter();
// HttpMessageConverter<?> another = ...
return new HttpMessageConverters(HymansonMessageConverter);
}
}
回答by Susobhan Das
I faced same issue. Fixed using org.springframework.http.converter.json.MappingHymanson2HttpMessageConverterinstead of org.springframework.http.converter.json.MappingHymansonHttpMessageConverte?r
我遇到了同样的问题。固定使用org.springframework.http.converter.json.MappingHymanson2HttpMessageConverter代替org.springframework.http.converter.json.MappingHymansonHttpMessageConverte?r
回答by Obi Wan - PallavJha
I had the issue, got it fixed by adding following dependencies in pom.xml
我遇到了这个问题，通过在 pom.xml 中添加以下依赖项来解决它
<dependency>
<groupId>com.fasterxml.Hymanson.core</groupId>
<artifactId>Hymanson-core</artifactId>
<version>2.6.3</version>
</dependency>
<dependency>
<groupId>com.fasterxml.Hymanson.core</groupId>
<artifactId>Hymanson-databind</artifactId>
<version>2.6.3</version>
</dependency>
Found it here!
回答by zhenwodefengcai
<dependency>
<groupId>com.fasterxml.Hymanson.core</groupId>
<artifactId>Hymanson-core</artifactId>
<version>2.6.3</version>
</dependency>
<dependency>
<groupId>com.fasterxml.Hymanson.core</groupId>
<artifactId>Hymanson-databind</artifactId>
<version>2.6.3</version>
</dependency>
it's worked for me
它对我有用
