springmvc spring mybatis jar包下载

转载

mob64ca140eb362 2024-09-24 08:20:57

文章标签 spring User xml 文章分类 架构后端开发

整合ssm实现简单的增删改查。。。

整合ssm一般不笼统的将三个框架一块整合，首先将Spring+mybatis整合。

第一步：新建maven项目，导入jar包依赖

springmvc spring mybatis jar包下载_User

第二步：需要pojo实体类，dao层接口，dao层映射文件，控制层，业务层，以及业务层的实现类

springmvc spring mybatis jar包下载_xml_02

资源文件，需要有mybatisConfig.xml、applicationContext-mybatis.xml，applicationContext-user.xml，springmvc.xml。

第三步：创建User：

package pers.llj.model;

public class User {
	private int id;
	private String username;
	private String age;
	public User() {
		super();
		// TODO Auto-generated constructor stub
	}
	public User(int id, String username, String age) {
		super();
		this.id = id;
		this.username = username;
		this.age = age;
	}
	public int getId() {
		return id;
	}
	public void setId(int id) {
		this.id = id;
	}
	public String getUsername() {
		return username;
	}
	public void setUsername(String username) {
		this.username = username;
	}
	public String getAge() {
		return age;
	}
	public void setAge(String age) {
		this.age = age;
	}
	@Override
	public String toString() {
		return "User [id=" + id + ", username=" + username + ", age=" + age + "]";
	}
	
}

第四步：创建UserMapper.java

package pers.llj.mapper;

import java.util.List;

import pers.llj.model.User;

/**
 * 作为dao接口
 * @author lenovo
 *
 */
public interface UserMapper {
	void insert(User user);
	boolean update(User user);
	boolean delete(int id);
	User findById(int id);
	List<User> findAll();
}

第五步：实现UserMapper

即UserMapper.xml（补充说明，以下的namespace必须与对应的接口名一致，UserMapper.java，id要与UserMapper中的方法同名）

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN"     
"http://mybatis.org/dtd/mybatis-3-mapper.dtd"> 
<!-- namespace: 必须与对应的接口类名一致，UserMapper.java
id 必须与对应接口的某个对应的方法名一致，必须要和UserMapper.java中的	方法同名
 -->
 <mapper namespace="pers.llj.mapper.UserMapper">
 	<!-- 增加用户 -->
 	<insert id="insert" parameterType="User">
 		insert into t_user(user_name,user_age) values(#{username},#{age})
 	</insert>
 	<!-- 删除用户 -->
 	<delete id="delete" parameterType="int">
 		delete from t_user where user_id=#{id}
 	</delete>
 	<!-- 修改用户 -->
 	<update id="update" parameterType="User">
 		update t_user set user_name=#{username},user_age=#{age} where user_id=#{id}
 	</update>
 	<!-- 根据id查用户 -->
 	<select id="findById" parameterType="int" resultType="User">
 		select user_id id,user_name username,user_age age from t_user where user_id=#{id}
 	</select>
 	<!-- 查询全部 -->
 	<select id="findAll" resultType="User">
 		select user_id id,user_name username,user_age age from t_user 
 	</select>
 </mapper>

第六步：然后对mybatis和spring进行整合

首先新建appliactionContext-mybatis.xml文件，此文件中需要创建数据源，配置数据库连接基本信息，配置数据库连接池相关信息，创建sqlSession，配置事务管理器，在事务管理器中注入数据源，使用声明式事务，启用注解实现事务管理，扫描dao层接口

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
	xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:p="http://www.springframework.org/schema/p"
	xmlns:context="http://www.springframework.org/schema/context"
	xmlns:aop="http://www.springframework.org/schema/aop" xmlns:tx="http://www.springframework.org/schema/tx"
	xsi:schemaLocation="http://www.springframework.org/schema/beans
    http://www.springframework.org/schema/beans/spring-beans-4.3.xsd
    http://www.springframework.org/schema/context
    http://www.springframework.org/schema/context/spring-context-4.3.xsd
    http://www.springframework.org/schema/aop
    http://www.springframework.org/schema/aop/spring-aop-4.3.xsd
    http://www.springframework.org/schema/tx
    http://www.springframework.org/schema/tx/spring-tx-4.3.xsd">
	<!-- mybatis和spring整合 -->
	<!-- 第一步：加载数据库配置文件 -->
	<!-- <context:property-placeholder location="db.properties" /> -->
	<!-- 第2步：创建数据源 -->
	<bean id="dataSource" class="com.alibaba.druid.pool.DruidDataSource"
		init-method="init" destroy-method="close">
		<!-- 配置数据库连接基本信息 -->
		<property name="driverClassName" value="com.mysql.cj.jdbc.Driver"></property>
		<property name="url" value="jdbc:mysql://localhost:3306/ssm?serverTimezone=Asia/Shanghai"></property>
		<property name="username" value="root"></property>
		<property name="password" value="123456"></property>
		<!-- 配置数据库连接池相关信息 -->
		<!-- 配置初始化大小、最小、最大 -->
		<property name="initialSize" value="5" />
		<property name="minIdle" value="2" />
		<property name="maxActive" value="10" />
		<!-- 配置获取连接等待超时的时间 -->
		<property name="maxWait" value="10000" />
		<!-- 配置间隔多久才进行一次检测，检测需要关闭的空闲连接，单位是毫秒 -->
		<property name="timeBetweenEvictionRunsMillis" value="60000" />
		<!-- 配置一个连接在池中最小生存的时间，单位是毫秒 -->
		<property name="minEvictableIdleTimeMillis" value="300000" />
		<property name="testWhileIdle" value="true" />
		<!-- 这里建议配置为TRUE，防止取到的连接不可用 -->
		<property name="testOnBorrow" value="true" />
		<property name="testOnReturn" value="false" />
		<!-- 打开PSCache，并且指定每个连接上PSCache的大小 -->
		<property name="poolPreparedStatements" value="true" />
		<property name="maxPoolPreparedStatementPerConnectionSize"
			value="20" />
		<!-- 这里配置提交方式，默认就是TRUE，可以不用配置 -->
		<property name="defaultAutoCommit" value="true" />
		<!-- 验证连接有效与否的SQL，不同的数据配置不同 -->
		<property name="validationQuery" value="select 1" />
	</bean>

	<!-- 第三步创建sqlSession -->
	<bean id="sqlSessionFactoryBean" class="org.mybatis.spring.SqlSessionFactoryBean">
		<property name="dataSource" ref="dataSource"></property>
		<property name="configLocation" value="classpath:mybatisConfig.xml"></property>
		<property name="mapperLocations" value="classpath:pers/llj/mapper/*.xml"></property>
	</bean>

	<!-- 第四步：配置事务管理器 -->
	<bean id="transactionManager"
		class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
		<!-- 注入数据源 -->
		<property name="dataSource" ref="dataSource"></property>
	</bean>

	<!-- 第五步：使用声明式事务 ,启用注解实现事务管理 -->
	<!-- 定义事务通知 -->
	<tx:advice id="userAdvice" transaction-manager="transactionManager">
		<!-- 定义方法对应的事务属性 -->
		<tx:attributes>
			<tx:method name="insert*" propagation="REQUIRED" isolation="READ_COMMITTED"
				read-only="false" timeout="-1" rollback-for="Exception" />
			<tx:method name="delete*" propagation="REQUIRED" isolation="READ_COMMITTED"
				read-only="false" timeout="-1" rollback-for="Exception" />
			<tx:method name="update*" propagation="REQUIRED" isolation="READ_COMMITTED"
				read-only="false" timeout="-1" rollback-for="Exception" />
			<tx:method name="find*" propagation="SUPPORTS" read-only="false"
				rollback-for="Exception" />
			<tx:method name="*" propagation="REQUIRED" isolation="READ_COMMITTED"
				read-only="false" timeout="-1" rollback-for="Exception" />
			<tx:method name="" />
		</tx:attributes>
	</tx:advice>
	<!-- 扫描dao层接口 -->
	<bean id="mapperScannerConfigurer" class="org.mybatis.spring.mapper.MapperScannerConfigurer">
		<property name="basePackage" value="pers.llj.mapper"></property>
		<property name="sqlSessionFactoryBeanName" value="sqlSessionFactoryBean"></property>
	</bean>

	
</beans>

第七步：创建service接口以及实现类，将service注入

package pers.llj.service;

import java.util.List;

import pers.llj.model.User;

public interface UserService {
	void insert(User user);
	boolean update(User user);
	boolean delete(int id);
	User findById(int id);
	List<User> findAll();
}

import java.util.List;

import javax.annotation.Resource;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import pers.llj.mapper.UserMapper;
import pers.llj.model.User;
import pers.llj.service.UserService;
@Service
@Transactional
public class UserServiceImpl implements UserService{
	@Resource
	private UserMapper userMapper;
	

	public UserMapper getUserMapper() {
		return userMapper;
	}

	public void setUserMapper(UserMapper userMapper) {
		this.userMapper = userMapper;
	}

	@Override
	public void insert(User user) {
		userMapper.insert(user);
	}

	@Override
	public boolean update(User user) {
		return userMapper.update(user);
	}

	@Override
	public boolean delete(int id) {
		return userMapper.delete(id);
	}

	@Override
	public User findById(int id) {
		return userMapper.findById(id);
	}

	@Override
	public List<User> findAll() {
		List<User> findAllList = userMapper.findAll();
		return findAllList;
	}

}

新建applicationContext-user.xml将service注入

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
	xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:p="http://www.springframework.org/schema/p"
	xmlns:context="http://www.springframework.org/schema/context"
	xmlns:aop="http://www.springframework.org/schema/aop" xmlns:tx="http://www.springframework.org/schema/tx"
	xsi:schemaLocation="http://www.springframework.org/schema/beans
    http://www.springframework.org/schema/beans/spring-beans-4.3.xsd
    http://www.springframework.org/schema/context
    http://www.springframework.org/schema/context/spring-context-4.3.xsd
    http://www.springframework.org/schema/aop
    http://www.springframework.org/schema/aop/spring-aop-4.3.xsd
    http://www.springframework.org/schema/tx
    http://www.springframework.org/schema/tx/spring-tx-4.3.xsd">
    
    <!-- service -->
    <bean id="userServiceImpl" class="pers.llj.service.impl.UserServiceImpl">
    	<!-- 将dao注入进来 -->
    	<property name="userMapper" ref="userMapper"></property>
    </bean>
</beans>

第八步：配置mybatis的配置文件起别名

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE configuration PUBLIC "-//mybatis.org//DTD Config 3.0//EN"   
"http://mybatis.org/dtd/mybatis-3-config.dtd"> 
<configuration>
	<!-- 设置别名 -->
	<typeAliases>
		<typeAlias type="pers.llj.model.User" alias="User"/>
	</typeAliases>
	
</configuration>

此时，可以进行，mybatis和spring整合完的测试，看能否通过

新建测试的包，编写测试类

package pers.llj.test;

import java.util.List;

import org.junit.Test;
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;

import pers.llj.model.User;
import pers.llj.service.UserService;

public class SpringMybatisTest {
	@Test
	public void Demo1(){
		ApplicationContext context=new ClassPathXmlApplicationContext(new String[]{"applicationContext-mybatis.xml","applicationContext-user.xml"});
		UserService userService = (UserService) context.getBean("userServiceImpl");
		List<User> list = userService.findAll();
		for (User user : list) {
			System.out.println(user);
		}
		
	}
	@Test
	public void Demo2(){
		ApplicationContext context=new ClassPathXmlApplicationContext(new String[]{"applicationContext-mybatis.xml","applicationContext-user.xml"});
		UserService userService = (UserService) context.getBean("userServiceImpl");
		User user=new User();
		user.setUsername("llj");
		user.setAge("21");
		user.setId(10);
		boolean b = userService.update(user);
		System.out.println(b);
	}
	@Test
	public void Demo3(){
		ApplicationContext context=new ClassPathXmlApplicationContext(new String[]{"applicationContext-mybatis.xml","applicationContext-user.xml"});
		UserService userService = (UserService) context.getBean("userServiceImpl");
		boolean b = userService.delete(10);
		System.out.println(b);
	}
}

增删改查，全部通过说明没有问题，至此，spring 和 mybatis整合完成。进行下一步：和springmvc进行整合。

第九步：新建springmvc.xml，放到resources路径下

配置注解扫描，以及视图解析器

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
	xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:p="http://www.springframework.org/schema/p"
	xmlns:context="http://www.springframework.org/schema/context"
	xmlns:aop="http://www.springframework.org/schema/aop" xmlns:tx="http://www.springframework.org/schema/tx"
	xsi:schemaLocation="http://www.springframework.org/schema/beans
    http://www.springframework.org/schema/beans/spring-beans-4.3.xsd
    http://www.springframework.org/schema/context
    http://www.springframework.org/schema/context/spring-context-4.3.xsd
    http://www.springframework.org/schema/aop
    http://www.springframework.org/schema/aop/spring-aop-4.3.xsd
    http://www.springframework.org/schema/tx
    http://www.springframework.org/schema/tx/spring-tx-4.3.xsd">
    <!-- 注解扫描包 -->
    <context:component-scan base-package="pers.llj.controller"></context:component-scan>
    <!-- <context:component-scan base-package="pers.llj.service"></context:component-scan> -->
    <!-- 视图解析器 ViewResolver -->
	<bean
		class="org.springframework.web.servlet.view.InternalResourceViewResolver">
		<property name="prefix" value="/" />
		<property name="suffix" value=".jsp" />
	</bean>
    
    
</beans>

第十步：配置web.xml文件（此处的contextConfigLocation是必须配置的，否则无法加载到ioc容器中）

<?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"
	xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd"
	version="2.5">
	<display-name>SSM01</display-name>
	<welcome-file-list>
		<welcome-file>index.html</welcome-file>
		<welcome-file>index.htm</welcome-file>
		<welcome-file>index.jsp</welcome-file>
		<welcome-file>default.html</welcome-file>
		<welcome-file>default.htm</welcome-file>
		<welcome-file>default.jsp</welcome-file>
	</welcome-file-list>
	<!-- 配置监听器 -->
	<!-- 在servlet上下文中配置ioc容器文件 -->
	<context-param>
		<param-name>contextConfigLocation</param-name>
		<param-value>classpath:applicationContext-*.xml</param-value>
		
	</context-param>
	<!-- 通过监听器加载ioc容器 -->
	<listener>
		<listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
	</listener>
	<!-- 配置过滤器 -->
	<filter>
		<filter-name>hiddenHttpMethodFilter</filter-name>
		<filter-class>org.springframework.web.filter.HiddenHttpMethodFilter</filter-class>
	</filter>
	<filter-mapping>
		<filter-name>hiddenHttpMethodFilter</filter-name>
		<url-pattern>/*</url-pattern>
	</filter-mapping>

	<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:springmvc.xml</param-value>
		</init-param>
		<load-on-startup>1</load-on-startup>
	</servlet>
 
	<servlet-mapping>
		<servlet-name>springmvc</servlet-name>
		<url-pattern>/</url-pattern>
	</servlet-mapping>
</web-app>

第十一步：编写控制层，并启用注解

package pers.llj.controller;

import java.io.IOException;
import java.io.PrintWriter;
import java.util.List;

import javax.annotation.Resource;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.RequestMapping;

import pers.llj.model.User;
import pers.llj.service.UserService;

@Controller
@RequestMapping("/user")
public class UserController {
	@Resource
	private UserService userService;
	

	public UserService getUserService() {
		return userService;
	}

	public void setUserService(UserService userService) {
		this.userService = userService;
	}

	/**
	 * 获取所有的用户列表
	 * 
	 * @param request
	 * @param model
	 * @return
	 */
	@RequestMapping("/getAllUser")
	public String getAllUser(HttpServletRequest request, Model model) {
		List<User> user = userService.findAll();
		model.addAttribute("userList", user);
		request.setAttribute("userList", user);
		return "allUser";
	}

	/**
	 * 跳转到添加用户界面
	 * 
	 * @param request
	 * @return
	 */
	@RequestMapping("/toAddUser")
	public String toAddUser() {
		return "addUser";
	}

	/**
	 * 添加用户并重定向
	 * 
	 * @param user
	 * @param request
	 * @return
	 */
	@RequestMapping("/addUser")
	public String addUser(User user, Model model) {
		userService.insert(user);
		return "redirect:/user/getAllUser";
	}

	/**
	 * 编辑用户
	 * 
	 * @param user
	 * @param request
	 * @return
	 */
	@RequestMapping("/updateUser")
	public String updateUser(User user, HttpServletRequest request, Model model) {
		if (userService.update(user)) {
			user = userService.findById(user.getId());
			request.setAttribute("user", user);
			model.addAttribute("user", user);
			return "redirect:/user/getAllUser";
		} else {
			return "error";
		}
	}

	/**
	 * 根据id查询单个用户
	 * 
	 * @param id
	 * @param request
	 * @return
	 */
	@RequestMapping("/getUser")
	public String getUser(int id, HttpServletRequest request, Model model) {
		request.setAttribute("user", userService.findById(id));
		model.addAttribute("user", userService.findById(id));
		return "editUser";
	}

	/**
	 * 删除用户
	 * 
	 * @param id
	 * @param request
	 * @param response
	 */
	@RequestMapping("/delUser")
	public String delUser(int id) {
		userService.delete(id);
		return "redirect:/user/getAllUser";
	}
}

至此，springmvc基本整合完成，此时编写前端页面

第十一步：前端首页的编写

<%@ page language="java" contentType="text/html; charset=UTF-8"
	pageEncoding="UTF-8"%>
<%
	String path = request.getContextPath();
	String basePath = request.getScheme() + "://" + request.getServerName() + ":" + request.getServerPort()
			+ path + "/";
%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<base href="<%=basePath%>">
<title>首页</title>
</head>
<body>
	<h5>
		<a href="<%=basePath%>user/getAllUser">进入用户管理页</a>
	</h5>
</body>
</html>

第十二步：前端用户列表页面编写

<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
<%
	String path = request.getContextPath();
	String basePath = request.getScheme() + "://" + request.getServerName() + ":" + request.getServerPort()
			+ path + "/";
%>
<%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c"%>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<base href="<%=basePath%>">
<script type="text/javascript" src="js/jquery-3.2.1.js"></script>
<title>用户列表</title>

</head>

<body>
	<h6>
		<a href="<%=basePath%>user/toAddUser">添加用户</a>
	</h6>
	<table border="1">
		<tbody>
			<tr>
				<th>姓名</th>
				<th>年龄</th>
				<th>操作</th>
			</tr>
			<c:if test="${!empty userList }">
				<c:forEach items="${userList}" var="user">
					<tr>
						<td>${user.username }</td>
						<td>${user.age }</td>
						<td><a href="<%=basePath%>user/getUser?id=${user.id}">编辑</a>
							<%-- <a href="javascript:del('${user.id }')">删除</a></td> --%>
							<a href="<%=basePath%>user/delUser?id=${user.id}">删除</a></td>
					</tr>
				</c:forEach>
			</c:if>
		</tbody>
	</table>
</body>
</html>

第十三步：前端页面修改页面编写：

<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
<%
	String path = request.getContextPath();
	String basePath = request.getScheme() + "://" + request.getServerName() + ":" + request.getServerPort()
			+ path + "/";
%>
<%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c"%>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<base href="<%=basePath%>">

<title>编辑用户</title>

<script type="text/javascript">  
    function updateUser(){  
        var form = document.forms[0];  
        form.action = "<%=basePath%>user/updateUser";
		form.method = "post";
		form.submit();
	}
</script>

</head>

<body>
	<h1>编辑用户</h1>
	<form action="" name="userForm">
		<input type="hidden" name="id" value="${user.id }" /> 姓名：<input
			type="text" name="username" value="${user.username }" /> 年龄：<input
			type="text" name="age" value="${user.age }" /> <input type="button"
			value="编辑" onclick="updateUser()" />
	</form>
</body>

</html>

至此：整合完成，注意如果使用到jquery的话，一定要引入库。

数据库的话，sql语句自行添加，此处将数据表粘上来。

springmvc spring mybatis jar包下载_xml_03

最后，还有一些，我整合过程中遇到的问题

在测试完mybatis和spring整合结果后，没有问题，但是添加springmvc之后会出现如下错误：

严重: Exception sending context initialized event to listener instance of class org.springframework.web.context.ContextLoaderListener org.springframework.beans.factory.BeanDefinitionStoreException: IOException parsing XML document from ServletContext resource [/WEB-INF/applicationContext.xml]; nested exception is java.io.FileNotFoundException: Could not open ServletContext resource [/WEB-INF/applicationContext.xml] at org.springframework.beans.factory.xml.XmlBeanDefinitionReader.loadBeanDefinitions(XmlBeanDefinitionReader.java:344) at org.springframework.beans.factory.xml.XmlBeanDefinitionReader.loadBeanDefinitions(XmlBeanDefinitionReader.java:304) at org.springframework.beans.factory.support.AbstractBeanDefinitionReader.loadBeanDefinitions(AbstractBeanDefinitionReader.java:181) at org.springframework.beans.factory.support.AbstractBeanDefinitionReader.loadBeanDefinitions(AbstractBeanDefinitionReader.java:217) at org.springframework.beans.factory.support.AbstractBeanDefinitionReader.loadBeanDefinitions(AbstractBeanDefinitionReader.java:188) at org.springframework.web.context.support.XmlWebApplicationContext.loadBeanDefinitions(XmlWebApplicationContext.java:125) at org.springframework.web.context.support.XmlWebApplicationContext.loadBeanDefinitions(XmlWebApplicationContext.java:94) at org.springframework.context.support.AbstractRefreshableApplicationContext.refreshBeanFactory(AbstractRefreshableApplicationContext.java:129) at org.springframework.context.support.AbstractApplicationContext.obtainFreshBeanFactory(AbstractApplicationContext.java:537) at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:452) at org.springframework.web.context.ContextLoader.configureAndRefreshWebApplicationContext(ContextLoader.java:403) at org.springframework.web.context.ContextLoader.initWebApplicationContext(ContextLoader.java:306) at org.springframework.web.context.ContextLoaderListener.contextInitialized(ContextLoaderListener.java:106) at org.apache.catalina.core.StandardContext.listenerStart(StandardContext.java:4727) at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5189) at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150) at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1403) at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1393) at java.util.concurrent.FutureTask.run(Unknown Source) at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source) at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source) at java.lang.Thread.run(Unknown Source) Caused by: java.io.FileNotFoundException: Could not open ServletContext resource [/WEB-INF/applicationContext.xml] at org.springframework.web.context.support.ServletContextResource.getInputStream(ServletContextResource.java:141) at org.springframework.beans.factory.xml.XmlBeanDefinitionReader.loadBeanDefinitions(XmlBeanDefinitionReader.java:330) ... 21 more 严重: Exception sending context destroyed event to listener instance of class org.springframework.web.context.ContextLoaderListener java.lang.IllegalStateException: BeanFactory not initialized or already closed - call 'refresh' before accessing beans via the ApplicationContext at org.springframework.context.support.AbstractRefreshableApplicationContext.getBeanFactory(AbstractRefreshableApplicationContext.java:170) at org.springframework.context.support.AbstractApplicationContext.destroyBeans(AbstractApplicationContext.java:908) at org.springframework.context.support.AbstractApplicationContext.doClose(AbstractApplicationContext.java:884) at org.springframework.context.support.AbstractApplicationContext.close(AbstractApplicationContext.java:836) at org.springframework.web.context.ContextLoader.closeWebApplicationContext(ContextLoader.java:579) at org.springframework.web.context.ContextLoaderListener.contextDestroyed(ContextLoaderListener.java:115) at org.apache.catalina.core.StandardContext.listenerStop(StandardContext.java:4774) at org.apache.catalina.core.StandardContext.stopInternal(StandardContext.java:5411) at org.apache.catalina.util.LifecycleBase.stop(LifecycleBase.java:226) at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:154) at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1403) at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1393) at java.util.concurrent.FutureTask.run(Unknown Source) at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source) at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source) at java.lang.Thread.run(Unknown Source)

类似于这种问题，或者说无法加载你的db.properties的问题，此时，请进行以下三步：

第一：请查看你的web.xml中是否在servlet上下文中配置ioc容器文件，即如下四行

<context-param>
		<param-name>contextConfigLocation</param-name>
		<param-value>classpath:applicationContext-*.xml</param-value>
	</context-param>

此文件在配置的时候要写到配置文件的上面。

第二：查看你UserMapper上的@Autowired或者@Resource是否有加，如下图：

springmvc spring mybatis jar包下载_User_04

第三：将你的db.properties换成传统的土方法直接配置到applicationContext-mybatis.xml中。

如果以上三个方法均不行，那么请检查代码，不能加载配置文件的问题，本人还未彻底摸清，有结果了会第一时间更贴，此贴写给迷茫的初学者。

以下配本工程的页面截图：

springmvc spring mybatis jar包下载_User_05

springmvc spring mybatis jar包下载_User_06

springmvc spring mybatis jar包下载_spring_07

springmvc spring mybatis jar包下载_User_08

以上！！

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