验证controller时出现:HTTP Status 500

验证controller时出现:HTTP Status 500 – Internal Server Error

来源：2-10 验证Controller

慕仰8442947

2019-04-24

AreaController.java

package com.web.admin;

import com.entity.Area;
import com.service.AreaService;

import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.ResponseBody;

@Controller
@RequestMapping("/admin") 
public class AreaController { 
	@Autowired
	private AreaService areaService;
	@RequestMapping(value = "/listarea", method = RequestMethod.GET)
	@ResponseBody
	private Map<String, Object> listArea() {
		Map<String, Object> modelMap = new HashMap<String, Object>();
		List<Area> list = new ArrayList<Area>();
		try {
			list = areaService.getAreaList();
			modelMap.put("rows", list);
			modelMap.put("total", list.size());
		} catch (Exception e) {
			e.printStackTrace();
			modelMap.put("success", false);
			modelMap.put("errMsg", e.toString());
		}
		return modelMap;
	}

}

spring-web.xml

<?xml version="1.0" encoding="UTF-8"?>

<mvc:annotation-driven />

<!-- 2.静态资源默认servlet配置 (1)加入对静态资源的处理：js,gif,png (2)允许使用"/"做整体映射 -->
<mvc:resources mapping="/resources/**" location="/resources/" />
<mvc:default-servlet-handler />

<!-- 3.定义视图解析器 -->
<bean id="viewResolver"
	class="org.springframework.web.servlet.view.InternalResourceViewResolver">
	<property name="prefix" value="/WEB-INF/jsp/"></property>
	<property name="suffix" value=".jsp"></property>
</bean>
<!-- 文件上传解析器 -->
<bean id="multipartResolver"
	class="org.springframework.web.multipart.commons.CommonsMultipartResolver">
	<property name="defaultEncoding" value="utf-8"></property>
	<!-- 1024 * 1024 * 20 = 20M -->
	<property name="maxUploadSize" value="20971520"></property>
	<property name="maxInMemorySize" value="20971520"></property>
</bean>

<!-- 4.扫描web相关的bean -->
<context:component-scan base-package="com.web" />

pom.xml

<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/4.0.0http://maven.apache.org/xsd/maven-4.0.0.xsd">
	<modelVersion>4.0.0</modelVersion>
	<groupId>Fledgling</groupId>
	<artifactId>My_gp</artifactId>
	<packaging>war</packaging>
	<version>0.0.1-SNAPSHOT</version>
	<name>My_gp Maven Webapp</name>
	<url>http://maven.apache.org</url>
	<properties>
		<spring.version>5.1.6.RELEASE</spring.version>
	</properties>
	<dependencies>
		<dependency>
			<groupId>junit</groupId>
			<artifactId>junit</artifactId>
			<version>4.12</version>
		</dependency>
		<!-- https://mvnrepository.com/artifact/ch.qos.logback/logback-classic -->
		<dependency>
			<groupId>ch.qos.logback</groupId>
			<artifactId>logback-classic</artifactId>
			<version>1.3.0-alpha4</version>
		</dependency>
		<!-- Spring -->
		<!-- 1)包含Spring 框架基本的核心工具类。Spring 其它组件要都要使用到这个包里的类，是其它组件的基本核心 -->
		<dependency>
			<groupId>org.springframework</groupId>
			<artifactId>spring-core</artifactId>
			<version>${spring.version}</version>
		</dependency>
		<!-- 2)这个jar 文件是所有应用都要用到的，它包含访问配置文件、创建和管理bean 以及进行Inversion of Control 
			/ Dependency Injection（IoC/DI）操作相关的所有类。如果应用只需基本的IoC/DI 支持，引入spring-core.jar 
			及spring-beans.jar 文件就可以了。 -->
		<dependency>
			<groupId>org.springframework</groupId>
			<artifactId>spring-beans</artifactId>
			<version>${spring.version}</version>
		</dependency>
		<!-- 3)这个jar 文件为Spring 核心提供了大量扩展。可以找到使用Spring ApplicationContext特性时所需的全部类，JDNI 
			所需的全部类，instrumentation组件以及校验Validation 方面的相关类。 -->
		<dependency>
			<groupId>org.springframework</groupId>
			<artifactId>spring-context</artifactId>
			<version>${spring.version}</version>
		</dependency>
		<!-- 4) 这个jar 文件包含对Spring 对JDBC 数据访问进行封装的所有类。 -->
		<dependency>
			<groupId>org.springframework</groupId>
			<artifactId>spring-jdbc</artifactId>
			<version>${spring.version}</version>
		</dependency>
		<!-- 5) 为JDBC、Hibernate、JDO、JPA等提供的一致的声明式和编程式事务管理。 -->
		<dependency>
			<groupId>org.springframework</groupId>
			<artifactId>spring-tx</artifactId>
			<version>${spring.version}</version>
		</dependency>
		<!-- 6)Spring web 包含Web应用开发时，用到Spring框架时所需的核心类，包括自动载入WebApplicationContext特性的类、Struts与JSF集成类、文件上传的支持类、Filter类和大量工具辅助类。 -->
		<dependency>
			<groupId>org.springframework</groupId>
			<artifactId>spring-web</artifactId>
			<version>${spring.version}</version>
		</dependency>
		<!-- 7)包含SpringMVC框架相关的所有类。 -->
		<dependency>
			<groupId>org.springframework</groupId>
			<artifactId>spring-webmvc</artifactId>
			<version>${spring.version}</version>
		</dependency>
		<!-- 8)Spring test 对JUNIT等测试框架的简单封装 -->
		<dependency>
			<groupId>org.springframework</groupId>
			<artifactId>spring-test</artifactId>
			<version>${spring.version}</version>
		</dependency>
		<!-- Servlet web -->
		<dependency>
			<groupId>javax.servlet</groupId>
			<artifactId>javax.servlet-api</artifactId>
			<version>3.1.0</version>
		</dependency>
		<dependency>
			<groupId>javax.servlet.jsp.jstl</groupId>
			<artifactId>jstl-api</artifactId>
			<version>1.2</version>
		</dependency>
		<dependency>
			<groupId>taglibs</groupId>
			<artifactId>standard</artifactId>
			<version>1.1.2</version>
		</dependency>


		<!-- json解析 -->
		<dependency>
			<groupId>com.fasterxml.jackson.core</groupId>
			<artifactId>jackson-databind</artifactId>
			<version>2.8.7</version>
		</dependency>
		<!-- Map工具类 对标准java Collection的扩展 spring-core.jar需commons-collections.jar -->
		<dependency>
			<groupId>commons-collections</groupId>
			<artifactId>commons-collections</artifactId>
			<version>3.2</version>
		</dependency>
		<dependency>
			<groupId>commons-fileupload</groupId>
			<artifactId>commons-fileupload</artifactId>
			<version>1.3.2</version>
		</dependency>
		<!-- DAO: MyBatis -->
		<dependency>
			<groupId>org.mybatis</groupId>
			<artifactId>mybatis</artifactId>
			<version>3.5.1</version>
		</dependency>
		<dependency>
			<groupId>org.mybatis</groupId>
			<artifactId>mybatis-spring</artifactId>
			<version>2.0.1</version>
		</dependency>
		<!-- 数据库 -->
		<dependency>
			<groupId>mysql</groupId>
			<artifactId>mysql-connector-java</artifactId>
			<version>8.0.15</version>
		</dependency>
		<dependency>
			<groupId>com.mchange</groupId>
			<artifactId>c3p0</artifactId>
			<version>0.9.5.2</version>
			<dependency>
				<groupId>com.mchange</groupId>
				<artifactId>c3p0</artifactId>
				<version>0.9.5.4</version>
			</dependency>
		</dependency>
		<!-- 图片处理 -->
		<!-- https://mvnrepository.com/artifact/net.coobird/thumbnailator -->
		<dependency>
			<groupId>net.coobird</groupId>
			<artifactId>thumbnailator</artifactId>
			<version>0.4.8</version>
		</dependency>
		<!-- https://mvnrepository.com/artifact/com.github.penggle/kaptcha -->
		<dependency>
			<groupId>com.github.penggle</groupId>
			<artifactId>kaptcha</artifactId>
			<version>2.3.2</version>
		</dependency>
		
		<dependency>
			<groupId>com.semanticcms</groupId>
			<artifactId>semanticcms-core-taglib</artifactId>
			<version>1.9.0</version>
		</dependency>
		<!-- redis客户端:Jedis -->
		<dependency>
			<groupId>redis.clients</groupId>
			<artifactId>jedis</artifactId>
			<version>2.9.0</version>
		</dependency>

		<dependency>
			<groupId>org.aspectj</groupId>
			<artifactId>aspectjweaver</artifactId>
			<version>1.9.3</version>
		</dependency>
		<dependency>
			<groupId>com.github.pagehelper</groupId>
			<artifactId>pagehelper</artifactId>
			<version>5.1.8</version>
		</dependency>

		<!-- java版本过高 -->
		<dependency>
			<groupId>javax.xml.bind</groupId>
			<artifactId>jaxb-api</artifactId>
			<version>2.3.0</version>
		</dependency>
		<dependency>
			<groupId>com.sun.xml.bind</groupId>
			<artifactId>jaxb-impl</artifactId>
			<version>2.3.0</version>
		</dependency>
		<dependency>
			<groupId>com.sun.xml.bind</groupId>
			<artifactId>jaxb-core</artifactId>
			<version>2.3.0</version>
		</dependency>
		<dependency>
			<groupId>javax.activation</groupId>
			<artifactId>activation</artifactId>
			<version>1.1.1</version>
		</dependency>



	</dependencies>
	<build>
		<finalName>My_gp</finalName>
	</build>
</project>

写回答

3回答

翔仔

2019-04-26

<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.imooc</groupId>
	<artifactId>o2o</artifactId>
	<packaging>war</packaging>
	<version>0.0.1-SNAPSHOT</version>
	<name>bsp Maven Webapp</name>
	<url>http://maven.apache.org</url>
	<properties>
		<spring.version>4.3.7.RELEASE</spring.version>
	</properties>
	<dependencies>
		<dependency>
			<groupId>junit</groupId>
			<artifactId>junit</artifactId>
			<version>4.12</version>
			<scope>test</scope>
		</dependency>
		<!-- https://mvnrepository.com/artifact/ch.qos.logback/logback-classic -->
		<dependency>
			<groupId>ch.qos.logback</groupId>
			<artifactId>logback-classic</artifactId>
			<version>1.2.3</version>
		</dependency>
		<!-- Spring -->
		<!-- 1)包含Spring 框架基本的核心工具类。Spring 其它组件要都要使用到这个包里的类，是其它组件的基本核心 -->
		<dependency>
			<groupId>org.springframework</groupId>
			<artifactId>spring-core</artifactId>
			<version>${spring.version}</version>
		</dependency>
		<!-- 2)这个jar 文件是所有应用都要用到的，它包含访问配置文件、创建和管理bean 以及进行Inversion of Control 
			/ Dependency Injection（IoC/DI）操作相关的所有类。如果应用只需基本的IoC/DI 支持，引入spring-core.jar 
			及spring-beans.jar 文件就可以了。 -->
		<dependency>
			<groupId>org.springframework</groupId>
			<artifactId>spring-beans</artifactId>
			<version>${spring.version}</version>
		</dependency>
		<!-- 3)这个jar 文件为Spring 核心提供了大量扩展。可以找到使用Spring ApplicationContext特性时所需的全部类，JDNI 
			所需的全部类，instrumentation组件以及校验Validation 方面的相关类。 -->
		<dependency>
			<groupId>org.springframework</groupId>
			<artifactId>spring-context</artifactId>
			<version>${spring.version}</version>
		</dependency>
		<!-- 4) 这个jar 文件包含对Spring 对JDBC 数据访问进行封装的所有类。 -->
		<dependency>
			<groupId>org.springframework</groupId>
			<artifactId>spring-jdbc</artifactId>
			<version>${spring.version}</version>
		</dependency>
		<!-- 5) 为JDBC、Hibernate、JDO、JPA等提供的一致的声明式和编程式事务管理。 -->
		<dependency>
			<groupId>org.springframework</groupId>
			<artifactId>spring-tx</artifactId>
			<version>${spring.version}</version>
		</dependency>
		<!-- 6)Spring web 包含Web应用开发时，用到Spring框架时所需的核心类，包括自动载入WebApplicationContext特性的类、Struts与JSF集成类、文件上传的支持类、Filter类和大量工具辅助类。 -->
		<dependency>
			<groupId>org.springframework</groupId>
			<artifactId>spring-web</artifactId>
			<version>${spring.version}</version>
		</dependency>
		<!-- 7)包含SpringMVC框架相关的所有类。 -->
		<dependency>
			<groupId>org.springframework</groupId>
			<artifactId>spring-webmvc</artifactId>
			<version>${spring.version}</version>
		</dependency>
		<!-- 8)Spring test 对JUNIT等测试框架的简单封装 -->
		<dependency>
			<groupId>org.springframework</groupId>
			<artifactId>spring-test</artifactId>
			<version>${spring.version}</version>
			<scope>test</scope>
		</dependency>
		<!-- Servlet web -->
		<dependency>
			<groupId>javax.servlet</groupId>
			<artifactId>javax.servlet-api</artifactId>
			<version>3.1.0</version>
		</dependency>
		<!-- json解析 -->
		<dependency>
			<groupId>com.fasterxml.jackson.core</groupId>
			<artifactId>jackson-databind</artifactId>
			<version>2.8.7</version>
		</dependency>
		<!-- Map工具类 对标准java Collection的扩展 spring-core.jar需commons-collections.jar -->
		<dependency>
			<groupId>commons-collections</groupId>
			<artifactId>commons-collections</artifactId>
			<version>3.2</version>
		</dependency>
		<!-- DAO: MyBatis -->
		<dependency>
			<groupId>org.mybatis</groupId>
			<artifactId>mybatis</artifactId>
			<version>3.4.2</version>
		</dependency>
		<dependency>
			<groupId>org.mybatis</groupId>
			<artifactId>mybatis-spring</artifactId>
			<version>1.3.1</version>
		</dependency>
		<!-- 数据库 -->
		<dependency>
			<groupId>mysql</groupId>
			<artifactId>mysql-connector-java</artifactId>
			<version>5.1.37</version>
		</dependency>
		<dependency>
			<groupId>c3p0</groupId>
			<artifactId>c3p0</artifactId>
			<version>0.9.1.2</version>
		</dependency>
		<!-- 图片处理 -->
		<!-- https://mvnrepository.com/artifact/net.coobird/thumbnailator -->
		<dependency>
			<groupId>net.coobird</groupId>
			<artifactId>thumbnailator</artifactId>
			<version>0.4.8</version>
		</dependency>
		<!-- https://mvnrepository.com/artifact/com.github.penggle/kaptcha -->
		<dependency>
			<groupId>com.github.penggle</groupId>
			<artifactId>kaptcha</artifactId>
			<version>2.3.2</version>
		</dependency>
		<dependency>
			<groupId>commons-fileupload</groupId>
			<artifactId>commons-fileupload</artifactId>
			<version>1.3.2</version>
		</dependency>
		<!-- redis客户端:Jedis -->
		<dependency>
			<groupId>redis.clients</groupId>
			<artifactId>jedis</artifactId>
			<version>2.9.0</version>
		</dependency>
	</dependencies>
	<build>
		<finalName>bsp</finalName>
		<plugins>
			<plugin>
				<groupId>org.apache.maven.plugins</groupId>
				<artifactId>maven-compiler-plugin</artifactId>
				<version>3.6.1</version>
				<configuration>
					<source>1.8</source>
					<target>1.8</target>
					<encoding>UTF8</encoding>
				</configuration>
			</plugin>
		</plugins>
	</build>
</project>

复制粘贴到自己的pom.xml之后，记得update maven project 然后clean tomcat试试

慕仰8442947

提问者

2019-04-25

网上有找过,试过几种方法还是不知道如何解决

这个引入课程不相关的包是在网上找问题有些说是使用Java版本过高原因,因为还没学习您这个课程我先安装了jdk\tomcat\mysql等都是比较新的版本

我现在测试一下引入课程不相关的包删掉也不会报错,就把引入的删了

出错的

org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter': Instantiation of bean failed; nested exception is org.springframework.beans.BeanInstantiationException: Failed to instantiate [org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter]: Constructor threw exception; nested exception is java.lang.NoClassDefFoundError: com/fasterxml/jackson/databind/exc/InvalidDefinitionException

第一个caused by

Caused by: org.springframework.beans.BeanInstantiationException: Failed to instantiate [org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter]: Constructor threw exception; nested exception is java.lang.NoClassDefFoundError: com/fasterxml/jackson/databind/exc/InvalidDefinitionException

所有的报错:

org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter': Instantiation of bean failed; nested exception is org.springframework.beans.BeanInstantiationException: Failed to instantiate [org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter]: Constructor threw exception; nested exception is java.lang.NoClassDefFoundError: com/fasterxml/jackson/databind/exc/InvalidDefinitionException

Caused by: org.springframework.beans.BeanInstantiationException: Failed to instantiate [org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter]: Constructor threw exception; nested exception is java.lang.NoClassDefFoundError: com/fasterxml/jackson/databind/exc/InvalidDefinitionException

Caused by: java.lang.ClassNotFoundException: com.fasterxml.jackson.databind.exc.InvalidDefinitionException

Caused by: org.springframework.beans.BeanInstantiationException: Failed to instantiate [org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter]: Constructor threw exception; nested exception is java.lang.NoClassDefFoundError: com/fasterxml/jackson/databind/exc/InvalidDefinitionException

4月 25, 2019 8:03:01 上午 org.apache.catalina.core.StandardWrapperValve invoke
严重: Allocate exception for servlet [spring-dispatcher]
java.lang.ClassNotFoundException: com.fasterxml.jackson.databind.exc.InvalidDefinitionException

翔仔

目前这个错是jar包缺失的原因导致的，同学直接复制粘贴我的pom.xml试试，然后你的mysql如果是8的话，还得修改c3p0还有jdbc相关jar到最新才可以，否则还是会报错，但是建议同学在没有解决问题的能力之前，先装回市面依然主流的mysql5.x版本

2019-04-26

共1条回复

翔仔

2019-04-24

同学好，不用着急贴源码，请问除了这个错还有什么别的错，这个错应该会有更详细的描述才对，光凭这个不好定位原因。最好把访问url的时候，Eclipse控制台报的错误全部贴出来，或者把cause 附近的语句直接贴百度，往往就会找到答案，提前锻炼下解决问题的能力。同时，我看同学jar包里面为什么引入了几个跟课程不相关的javax.xml.bind

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