轉載：Spring整合JSON報錯：java.lang.ClassNotFoundException: org.codehaus.jackson.JsonProcessingException

假裝鎮定發表於2018-09-06
SpringJSONJavaException

轉載：https://blog.csdn.net/jiaotuwoaini/article/details/52366057

先看異常資訊：

  1. SEVERE: StandardWrapper.Throwable
  2. java.lang.NoClassDefFoundError: org/codehaus/jackson/JsonProcessingException
  3. 	at java.lang.Class.getDeclaredConstructors0(Native Method)
  4. 	at java.lang.Class.privateGetDeclaredConstructors(Class.java:2493)
  5. 	at java.lang.Class.getDeclaredConstructors(Class.java:1901)
  6. 	at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor.determineCandidateConstructors(AutowiredAnnotationBeanPostProcessor.java:234)
  7. 	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.determineConstructorsFromBeanPostProcessors(AbstractAutowireCapableBeanFactory.java:1040)
  8. 	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBeanInstance(AbstractAutowireCapableBeanFactory.java:1013)
  9. 	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:504)
  10. 	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:475)
  11. 	at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:304)
  12. 	at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:228)
  13. 	at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:300)
  14. 	at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:195)
  15. 	at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:700)
  16. 	at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:760)
  17. 	at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:482)
  18. 	at org.springframework.web.servlet.FrameworkServlet.configureAndRefreshWebApplicationContext(FrameworkServlet.java:658)
  19. 	at org.springframework.web.servlet.FrameworkServlet.createWebApplicationContext(FrameworkServlet.java:624)
  20. 	at org.springframework.web.servlet.FrameworkServlet.createWebApplicationContext(FrameworkServlet.java:672)
  21. 	at org.springframework.web.servlet.FrameworkServlet.initWebApplicationContext(FrameworkServlet.java:543)
  22. 	at org.springframework.web.servlet.FrameworkServlet.initServletBean(FrameworkServlet.java:484)
  23. 	at org.springframework.web.servlet.HttpServletBean.init(HttpServletBean.java:136)
  24. 	at javax.servlet.GenericServlet.init(GenericServlet.java:158)
  25. 	at org.apache.catalina.core.StandardWrapper.initServlet(StandardWrapper.java:1231)
  26. 	at org.apache.catalina.core.StandardWrapper.loadServlet(StandardWrapper.java:1144)
  27. 	at org.apache.catalina.core.StandardWrapper.load(StandardWrapper.java:1031)
  28. 	at org.apache.catalina.core.StandardContext.loadOnStartup(StandardContext.java:4909)
  29. 	at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5196)
  30. 	at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)
  31. 	at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:725)
  32. 	at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:701)
  33. 	at org.apache.catalina.core.StandardHost.addChild(StandardHost.java:717)
  34. 	at org.apache.catalina.startup.HostConfig.deployDirectory(HostConfig.java:1069)
  35. 	at org.apache.catalina.startup.HostConfig$DeployDirectory.run(HostConfig.java:1719)
  36. 	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:471)
  37. 	at java.util.concurrent.FutureTask.run(FutureTask.java:262)
  38. 	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
  39. 	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
  40. 	at java.lang.Thread.run(Thread.java:744)
  41. Caused by: java.lang.ClassNotFoundException: org.codehaus.jackson.JsonProcessingException
  42. 	at org.apache.catalina.loader.WebappClassLoaderBase.loadClass(WebappClassLoaderBase.java:1305)
  43. 	at org.apache.catalina.loader.WebappClassLoaderBase.loadClass(WebappClassLoaderBase.java:1157)
  44. 	... 38 more

看我們的pom.xml配置： 

  1. <properties>
  2. 		<!-- spring版本號 -->
  3. 		<spring.version>4.0.2.RELEASE</spring.version>
  4. 		<!-- mybatis版本號 -->
  5. 		<mybatis.version>3.2.6</mybatis.version>
  6. 		<!-- log4j日誌檔案管理包版本 -->
  7. 		<slf4j.version>1.7.7</slf4j.version>
  8. 		<log4j.version>1.2.17</log4j.version>
  9. 		<jackson.version>2.8.1</jackson.version>
  10. 	</properties>
  11.  
  12. 	<dependencies>
  13. 		<dependency>
  14. 			<groupId>junit</groupId>
  15. 			<artifactId>junit</artifactId>
  16. 			<version>4.11</version>
  17. 			<!-- 表示開發的時候引入，釋出的時候不會載入此包 -->
  18. 			<scope>test</scope>
  19. 		</dependency>
  20. 		<!-- spring核心包 -->
  21. 		<dependency>
  22. 			<groupId>org.springframework</groupId>
  23. 			<artifactId>spring-core</artifactId>
  24. 			<version>${spring.version}</version>
  25. 		</dependency>
  26.  
  27. 		<dependency>
  28. 			<groupId>org.springframework</groupId>
  29. 			<artifactId>spring-web</artifactId>
  30. 			<version>${spring.version}</version>
  31. 		</dependency>
  32. 		<dependency>
  33. 			<groupId>org.springframework</groupId>
  34. 			<artifactId>spring-oxm</artifactId>
  35. 			<version>${spring.version}</version>
  36. 		</dependency>
  37. 		<dependency>
  38. 			<groupId>org.springframework</groupId>
  39. 			<artifactId>spring-tx</artifactId>
  40. 			<version>${spring.version}</version>
  41. 		</dependency>
  42.  
  43. 		<dependency>
  44. 			<groupId>org.springframework</groupId>
  45. 			<artifactId>spring-jdbc</artifactId>
  46. 			<version>${spring.version}</version>
  47. 		</dependency>
  48.  
  49. 		<dependency>
  50. 			<groupId>org.springframework</groupId>
  51. 			<artifactId>spring-webmvc</artifactId>
  52. 			<version>${spring.version}</version>
  53. 		</dependency>
  54. 		<dependency>
  55. 			<groupId>org.springframework</groupId>
  56. 			<artifactId>spring-aop</artifactId>
  57. 			<version>${spring.version}</version>
  58. 		</dependency>
  59.  
  60. 		<dependency>
  61. 			<groupId>org.springframework</groupId>
  62. 			<artifactId>spring-context-support</artifactId>
  63. 			<version>${spring.version}</version>
  64. 		</dependency>
  65.  
  66. 		<dependency>
  67. 			<groupId>org.springframework</groupId>
  68. 			<artifactId>spring-test</artifactId>
  69. 			<version>${spring.version}</version>
  70. 		</dependency>
  71. 		<!-- mybatis核心包 -->
  72. 		<dependency>
  73. 			<groupId>org.mybatis</groupId>
  74. 			<artifactId>mybatis</artifactId>
  75. 			<version>${mybatis.version}</version>
  76. 		</dependency>
  77. 		<!-- mybatis/spring包 -->
  78. 		<dependency>
  79. 			<groupId>org.mybatis</groupId>
  80. 			<artifactId>mybatis-spring</artifactId>
  81. 			<version>1.2.2</version>
  82. 		</dependency>
  83. 		<!-- 匯入java ee jar 包 -->
  84. 		<dependency>
  85. 			<groupId>javax</groupId>
  86. 			<artifactId>javaee-api</artifactId>
  87. 			<version>7.0</version>
  88. 		</dependency>
  89. 		<!-- 匯入Mysql資料庫連結jar包 -->
  90. 		<dependency>
  91. 			<groupId>mysql</groupId>
  92. 			<artifactId>mysql-connector-java</artifactId>
  93. 			<version>5.1.30</version>
  94. 		</dependency>
  95. 		<!-- 匯入dbcp的jar包，用來在applicationContext.xml中配置資料庫 -->
  96. 		<dependency>
  97. 			<groupId>commons-dbcp</groupId>
  98. 			<artifactId>commons-dbcp</artifactId>
  99. 			<version>1.2.2</version>
  100. 		</dependency>
  101. 		<!-- JSTL標籤類 -->
  102. 		<dependency>
  103. 			<groupId>jstl</groupId>
  104. 			<artifactId>jstl</artifactId>
  105. 			<version>1.2</version>
  106. 		</dependency>
  107. 		<!-- 日誌檔案管理包 -->
  108. 		<!-- log start -->
  109. 		<dependency>
  110. 			<groupId>log4j</groupId>
  111. 			<artifactId>log4j</artifactId>
  112. 			<version>${log4j.version}</version>
  113. 		</dependency>
  114.  
  115.  
  116. 		<!-- 格式化物件，方便輸出日誌 -->
  117. 		<dependency>
  118. 			<groupId>com.alibaba</groupId>
  119. 			<artifactId>fastjson</artifactId>
  120. 			<version>1.1.41</version>
  121. 		</dependency>
  122.  
  123. 		<dependency>
  124. 			<groupId>org.slf4j</groupId>
  125. 			<artifactId>slf4j-api</artifactId>
  126. 			<version>${slf4j.version}</version>
  127. 		</dependency>
  128.  
  129. 		<dependency>
  130. 			<groupId>org.slf4j</groupId>
  131. 			<artifactId>slf4j-log4j12</artifactId>
  132. 			<version>${slf4j.version}</version>
  133. 		</dependency>
  134. 		<!-- log end -->
  135. 		<!-- 映入JSON -->
  136. 	<span style="color:#ff0000;">	<dependency>
  137. 			<groupId>com.fasterxml.jackson.core</groupId>
  138. 			<artifactId>jackson-databind</artifactId>
  139. 			<version>${jackson.version}</version>
  140. 		</dependency>
  141. 		<dependency>
  142. 			<groupId>com.fasterxml.jackson.core</groupId>
  143. 			<artifactId>jackson-annotations</artifactId>
  144. 			<version>${jackson.version}</version>
  145. 		</dependency>
  146. 		<dependency>
  147. 			<groupId>com.fasterxml.jackson.core</groupId>
  148. 			<artifactId>jackson-core</artifactId>
  149. 			<version>${jackson.version}</version>
  150. 		</dependency></span>
  151. 		<!-- 上傳元件包 -->
  152. 		<dependency>
  153. 			<groupId>commons-fileupload</groupId>
  154. 			<artifactId>commons-fileupload</artifactId>
  155. 			<version>1.3.1</version>
  156. 		</dependency>
  157. 		<dependency>
  158. 			<groupId>commons-io</groupId>
  159. 			<artifactId>commons-io</artifactId>
  160. 			<version>2.4</version>
  161. 		</dependency>
  162. 		<dependency>
  163. 			<groupId>commons-codec</groupId>
  164. 			<artifactId>commons-codec</artifactId>
  165. 			<version>1.9</version>
  166. 		</dependency>
  167. 		<dependency>
  168. 			<groupId>org.apache.httpcomponents</groupId>
  169. 			<artifactId>httpclient</artifactId>
  170. 			<version>4.5.2</version>
  171. 		</dependency>
  172.  
  173. 	</dependencies>

可以看到紅色的jackson已經被配置進去了，為什麼還報錯？

經過排查發現Spring的配置是從網上拷貝的，版本比較老，其中關於json的配置是：

  1.  <!--避免IE執行AJAX時，返回JSON出現下載檔案 -->  
  2.     <bean id="mappingJacksonHttpMessageConverter"  
  3.         class="org.springframework.http.converter.json.MappingJacksonHttpMessageConverter">  
  4.         <property name="supportedMediaTypes">  
  5.             <list>  
  6.                 <value>text/html;charset=UTF-8</value>  
  7.             </list>  
  8.         </property>  
  9.     </bean>
如果將Spring的版本提高到最新的版本(4.3.2.RELEASE)，這裡其實是會報錯的。

原來是實現類變化了，現在更改為：

  1.         class="org.springframework.http.converter.json.MappingJackson2HttpMessageConverter">  
  2.         <property name="supportedMediaTypes">  
  3.             <list>  
  4.                 <value>text/html;charset=UTF-8</value>  
  5.             </list>  
  6.         </property>  
  7.     </bean>
注意中間的 2 。



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