2. 程式人生 > >Spring MVC 配置報錯： Error creating bean with name 'userController': Injection of resource dependencies

Spring MVC 配置報錯： Error creating bean with name 'userController': Injection of resource dependencies

阿新 • • 發佈：2019-01-13

今天做了一個簡單的專案，用spring+springMVC實現使用者的CRUD，看似簡單的一個小demo，卻在配置上浪費了不少時間，

首先看一下目錄結構：


專案要求使用jdbcTemplate配置資料來源，下面附上spring的配置檔案和springMVC的配置檔案，分別如下：

applicationContext.xml如下：


spring-MVC.xml配置如下：


web.xml配置如下：

<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
	xmlns="http://java.sun.com/xml/ns/javaee" xmlns:web="http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd"
	xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd"
	version="3.0">
	<display-name></display-name>
	<context-param>
		<param-name>contextConfigLocation</param-name>
		<param-value>classpath:resources/applicationContext.xml</param-value>
	</context-param>
	<!-- 字元編碼配置 -->
	<filter>
		<filter-name>encodingFilter</filter-name>
		<filter-class>org.springframework.web.filter.CharacterEncodingFilter</filter-class>
		<async-supported>true</async-supported>
		<init-param>
			<param-name>encoding</param-name>
			<param-value>UTF-8</param-value>
		</init-param>
	</filter>
	<filter-mapping>
		<filter-name>encodingFilter</filter-name>
		<url-pattern>/*</url-pattern>
	</filter-mapping>
	
 
        <!-- Spring監聽器 -->
	<listener>
		<listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
	</listener>
      <!-- 防止Spring記憶體溢位監聽器 -->
     <listener><listener-class>org.springframework.web.util.IntrospectorCleanupListener</listener-class></listener>
     <!-- Spring MVC servlet -->
     <servlet>
         <servlet-name>SpringMVC</servlet-name>
         <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
         <init-param>
             <param-name>contextConfigLocation</param-name>
             <param-value>classpath:resources/spring-mvc.xml</param-value>
         </init-param>
         <load-on-startup>1</load-on-startup>
         <async-supported>true</async-supported>
      </servlet>
      <servlet-mapping>
          <servlet-name>SpringMVC</servlet-name>
          <url-pattern>*.action</url-pattern>
       </servlet-mapping>
   <welcome-file-list><welcome-file>index.jsp</welcome-file></welcome-file-list></web-app>

 
public interface UserDao {

	/**
	 * 查詢所有使用者
	 * @return
	 */
	public List<User> queryAllUsers();
}

package com.qunar.dao.impl;

import java.sql.ResultSet;
import java.sql.SQLException;
import java.util.ArrayList;
import java.util.List;

import javax.annotation.Resource;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.jdbc.core.JdbcTemplate;
import org.springframework.jdbc.core.RowCallbackHandler;
import org.springframework.stereotype.Repository;

import com.qunar.dao.UserDao;
import com.qunar.model.User;
/**
 * 
 * @author sky
 *
 */
@Repository
public class UserDaoImpl implements UserDao {

	@Resource
	private JdbcTemplate jdbcTemplate;
	
	/**
	 * 查詢所有使用者
	 */
	@Override
	public List<User> queryAllUsers() {
		String sql = "select * from t_user where inUse = false";
		final List<User> list = new ArrayList<User>();
		this.jdbcTemplate.query(sql, new RowCallbackHandler() {
			@Override
			public void processRow(ResultSet rs) throws SQLException {
				User user = new User();
				user.setId(rs.getString("id"));
				user.setName(rs.getString("name"));
				user.setGender(rs.getString("gender"));
				user.setAge(rs.getInt("age"));
				user.setRemarks(rs.getString("remarks"));
				user.setCreate_time(rs.getString("create_time"));
				user.setLast_edit_time(rs.getString("last_edit_time"));
				list.add(user);
			}
		});
		return list;
	}
	
}

 
public interface UserService {
	/**
	 * 查詢所有使用者
	 * @return
	 */
	public List<User> queryAllUsers();
}
@Service
public class UserServiceImpl implements UserService{

	@Resource
	private UserDao userDao;
	
	@Override
	public List<User> queryAllUsers() {
		return userDao.queryAllUsers();
	}
	
}

@Controller
public class UserController {
	
	@Resource
	private UserService userService;

	
	/**
	 * 初始化使用者列表
	 * @return
	 */
	@RequestMapping("initUserList")
	public ModelAndView initUserList(ModelAndView mv){
		List<User> list = this.userService.queryAllUsers();
		System.out.println(list);
		mv.addObject("list", this.userService.queryAllUsers());
		mv.setViewName("index");
		return mv;
	}
	
}
public class User {
	private String id; 				//編號
	private String name;			//姓名
	private String gender;			//性別
	private Integer age;				//年齡
	private String remarks;			//備註
	private boolean inUse;			//是否可用
	private String create_time;		//建立時間
	private String last_edit_time;	//最後編輯時間

        setter/getter省略
}
此時都配置結束了，開始執行，控制檯報如下錯誤：
警告: Exception encountered during context initialization - cancelling refresh attempt
org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'userController': Injection of resource dependencies failed; nested exception is org.springframework.beans.factory.NoSuchBeanDefinitionException: No qualifying bean of type [com.qunar.service.UserService] found for dependency: expected at least 1 bean which qualifies as autowire candidate for this dependency. Dependency annotations: {@javax.annotation.Resource(shareable=true, lookup=, name=, description=, authenticationType=CONTAINER, type=class java.lang.Object, mappedName=)}
	at org.springframework.context.annotation.CommonAnnotationBeanPostProcessor.postProcessPropertyValues(CommonAnnotationBeanPostProcessor.java:308)
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.populateBean(AbstractAutowireCapableBeanFactory.java:1210)
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:537)
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:476)
	at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:303)
	at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:230)
	at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:299)
	at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:194)
	at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:755)
	at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:757)
	at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:480)
	at org.springframework.web.servlet.FrameworkServlet.configureAndRefreshWebApplicationContext(FrameworkServlet.java:663)
	at org.springframework.web.servlet.FrameworkServlet.createWebApplicationContext(FrameworkServlet.java:629)
	at org.springframework.web.servlet.FrameworkServlet.createWebApplicationContext(FrameworkServlet.java:677)
	at org.springframework.web.servlet.FrameworkServlet.initWebApplicationContext(FrameworkServlet.java:548)
	at org.springframework.web.servlet.FrameworkServlet.initServletBean(FrameworkServlet.java:489)
	at org.springframework.web.servlet.HttpServletBean.init(HttpServletBean.java:136)
	at javax.servlet.GenericServlet.init(GenericServlet.java:158)
	at org.apache.catalina.core.StandardWrapper.initServlet(StandardWrapper.java:1236)
	at org.apache.catalina.core.StandardWrapper.loadServlet(StandardWrapper.java:1149)
	at org.apache.catalina.core.StandardWrapper.load(StandardWrapper.java:1041)
	at org.apache.catalina.core.StandardContext.loadOnStartup(StandardContext.java:4910)
	at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5192)
	at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)
	at org.apache.catalina.core.StandardContext.reload(StandardContext.java:3749)
	at org.apache.catalina.startup.HostConfig.reload(HostConfig.java:1365)
	at org.apache.catalina.startup.HostConfig.checkResources(HostConfig.java:1348)
	at org.apache.catalina.startup.HostConfig.check(HostConfig.java:1532)
	at org.apache.catalina.startup.HostConfig.lifecycleEvent(HostConfig.java:280)
	at org.apache.catalina.util.LifecycleSupport.fireLifecycleEvent(LifecycleSupport.java:117)
	at org.apache.catalina.util.LifecycleBase.fireLifecycleEvent(LifecycleBase.java:90)
	at org.apache.catalina.core.ContainerBase.backgroundProcess(ContainerBase.java:1143)
	at org.apache.catalina.core.ContainerBase$ContainerBackgroundProcessor.processChildren(ContainerBase.java:1356)
	at org.apache.catalina.core.ContainerBase$ContainerBackgroundProcessor.processChildren(ContainerBase.java:1360)
	at org.apache.catalina.core.ContainerBase$ContainerBackgroundProcessor.run(ContainerBase.java:1336)
	at java.lang.Thread.run(Thread.java:748)
Caused by: org.springframework.beans.factory.NoSuchBeanDefinitionException: No qualifying bean of type [com.qunar.service.UserService] found for dependency: expected at least 1 bean which qualifies as autowire candidate for this dependency. Dependency annotations: {@javax.annotation.Resource(shareable=true, lookup=, name=, description=, authenticationType=CONTAINER, type=class java.lang.Object, mappedName=)}
	at org.springframework.beans.factory.support.DefaultListableBeanFactory.raiseNoSuchBeanDefinitionException(DefaultListableBeanFactory.java:1301)
	at org.springframework.beans.factory.support.DefaultListableBeanFactory.doResolveDependency(DefaultListableBeanFactory.java:1047)
	at org.springframework.beans.factory.support.DefaultListableBeanFactory.resolveDependency(DefaultListableBeanFactory.java:942)
	at org.springframework.context.annotation.CommonAnnotationBeanPostProcessor.autowireResource(CommonAnnotationBeanPostProcessor.java:457)
	at org.springframework.context.annotation.CommonAnnotationBeanPostProcessor.getResource(CommonAnnotationBeanPostProcessor.java:435)
	at org.springframework.context.annotation.CommonAnnotationBeanPostProcessor$ResourceElement.getResourceToInject(CommonAnnotationBeanPostProcessor.java:559)
	at org.springframework.beans.factory.annotation.InjectionMetadata$InjectedElement.inject(InjectionMetadata.java:169)
	at org.springframework.beans.factory.annotation.InjectionMetadata.inject(InjectionMetadata.java:88)
	at org.springframework.context.annotation.CommonAnnotationBeanPostProcessor.postProcessPropertyValues(CommonAnnotationBeanPostProcessor.java:305)
	... 35 more

經過各方掙扎和上網查資料，最後在web.xml的一個地方進行了修改：
<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
	xmlns="http://java.sun.com/xml/ns/javaee" xmlns:web="http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd"
	xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd"
	version="3.0">
	<display-name></display-name>
	<!-- Spring監聽器 -->
        【此處做的修改！CSDN字型標紅總是顯示失敗】
 <listener>
		<listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>  
	</listener>
	<context-param>
		<param-name>contextConfigLocation</param-name>
		<param-value>classpath:resources/applicationContext.xml</param-value>
	</context-param>
	<!-- 字元編碼配置 -->
	<filter>
		<filter-name>encodingFilter</filter-name>
		<filter-class>org.springframework.web.filter.CharacterEncodingFilter</filter-class>
		<async-supported>true</async-supported>
		<init-param>
			<param-name>encoding</param-name>
			<param-value>UTF-8</param-value>
		</init-param>
	</filter>
	<filter-mapping>
		<filter-name>encodingFilter</filter-name>
		<url-pattern>/*</url-pattern>
	</filter-mapping>
	
	<!-- 防止Spring記憶體溢位監聽器 -->
	<listener>
		<listener-class>org.springframework.web.util.IntrospectorCleanupListener</listener-class>
	</listener>
	<!-- Spring MVC servlet -->
	<servlet>
		<servlet-name>SpringMVC</servlet-name>
		<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
		<init-param>
			<param-name>contextConfigLocation</param-name>
			<param-value>classpath:resources/spring-mvc.xml</param-value>
		</init-param>
		<load-on-startup>1</load-on-startup>
		<async-supported>true</async-supported>
	</servlet>
	<servlet-mapping>
		<servlet-name>SpringMVC</servlet-name>
		<url-pattern>*.action</url-pattern>
		
	</servlet-mapping>
	<welcome-file-list>
		<welcome-file>index.jsp</welcome-file>
	</welcome-file-list>
</web-app>




最後，tomcat正常啟動！

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