Java知识总结---整合SpringMVC+Mybatis+Spring（二）
2024-08-30 11:32:59
在如今的Java Web开发过程中，各种各样框架层出不穷。在工作中，框架的使用也越来越频繁。
今天介绍一下如今比較流行的SpringMVC、Mybatis和Spring框架。学习一下怎样在项目中使用它们。本次项目的创建使用maven来完毕。
1、使用maven创建web项目。选择Maven Project，catalogs选择webapps，输入groupId,artifactId,完毕就可以。
2、在pom.xml中引入相关的依赖：
<properties>
<spring.version>3.2.12.RELEASE</spring.version>
</properties>
<dependencies>
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>4.10</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>javax.servlet</groupId>
<artifactId>servlet-api</artifactId>
<version>2.4</version>
</dependency> <!-- spring依赖 -->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-core</artifactId>
<version>${spring.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-beans</artifactId>
<version>${spring.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-tx</artifactId>
<version>${spring.version}</version>
</dependency> <dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-aop</artifactId>
<version>${spring.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-aspects</artifactId>
<version>${spring.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-context</artifactId>
<version>${spring.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-context-support</artifactId>
<version>${spring.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-jdbc</artifactId>
<version>${spring.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-webmvc</artifactId>
<version>${spring.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-test</artifactId>
<version>${spring.version}</version>
</dependency> <!-- mybatis依赖 -->
<dependency>
<groupId>org.mybatis</groupId>
<artifactId>mybatis</artifactId>
<version>3.2.7</version>
</dependency>
<dependency>
<groupId>org.mybatis</groupId>
<artifactId>mybatis-spring</artifactId>
<version>1.2.2</version>
</dependency> <!-- mysql驱动 -->
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<version>5.1.5</version>
</dependency> <!-- jsp相关依赖 -->
<dependency>
<groupId>jstl</groupId>
<artifactId>jstl</artifactId>
<version>1.2</version>
</dependency>
<dependency>
<groupId>taglibs</groupId>
<artifactId>standard</artifactId>
<version>1.1.2</version>
</dependency>
<dependency>
<groupId>javax.servlet</groupId>
<artifactId>jsp-api</artifactId>
<version>2.0</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>javax.servlet</groupId>
<artifactId>servlet-api</artifactId>
<version>2.5</version>
<scope>test</scope>
</dependency> </dependencies>
2、创建spring配置文件
在src下创建applicationContext.xml，内容临时为空。
3、在web.xml中引入spring
在web.xml中加入例如以下内容：
<context-param>
<param-name>contextConfigLocation</param-name>
<param-value>classpath:applicationContext.xml</param-value>
</context-param> <listener>
<listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
</listener>
4、添加spring-mvc配置
在WEB-INF下添加spring-servlet.xml文件，内容例如以下。
<?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:aop="http://www.springframework.org/schema/aop"
xmlns:tx="http://www.springframework.org/schema/tx" xmlns:p="http://www.springframework.org/schema/p"
xmlns:context="http://www.springframework.org/schema/context"
xsi:schemaLocation="
http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-2.5.xsd
http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-2.5.xsd
http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-2.5.xsd
http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-2.5.xsd"> <context:component-scan base-package="com.demo.controller" />
<bean class="org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter" /> <bean id="viewResolver"
class="org.springframework.web.servlet.view.InternalResourceViewResolver">
<property name="viewClass"
value="org.springframework.web.servlet.view.JstlView" />
<property name="prefix" value="/WEB-INF/page/" />
<property name="suffix" value=".jsp" />
</bean> </beans>
在web.xml中引入例如以下内容：
<servlet>
<servlet-name>spring</servlet-name>
<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
<load-on-startup>1</load-on-startup>
</servlet> <servlet-mapping>
<servlet-name>spring</servlet-name>
<url-pattern>*.do</url-pattern>
</servlet-mapping>
在此处要特别注意：servlet-name假设是spring。则springmvc的配置文件就必须是spring-servlet.xml
5、mybatis配置
在src下创建mybatis的配置文件mybatis-config.xml，内容例如以下：
<?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>
<settings>
<setting name="cacheEnabled" value="true" />
<setting name="lazyLoadingEnabled" value="false" />
<setting name="defaultStatementTimeout" value="30" />
</settings> <mappers>
<mapper resource="mybatis/UserMapper.xml" />
</mappers>
</configuration>
在applicationContext.xml文件里配置mybatis：
<?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:context="http://www.springframework.org/schema/context"
xsi:schemaLocation="http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context.xsd"> <context:property-placeholder location="classpath:jdbc.properties"/>
<context:component-scan base-package="com.demo" /> <bean id="dataSource" class="org.springframework.jdbc.datasource.DriverManagerDataSource">
<property name="driverClassName" value="${jdbc.driverClassName}" />
<property name="url" value="${jdbc.url}" />
<property name="username" value="${jdbc.username}"></property>
<property name="password" value="${jdbc.password}"></property>
</bean> <bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
<property name="dataSource" ref="dataSource" />
</bean> <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
<property name="configLocation" value="classpath:mybatis-config.xml" />
<property name="dataSource" ref="dataSource" />
</bean>
当中jdbc.properties文件也在src下：
jdbc.driverClassName=com.mysql.jdbc.Driver
jdbc.url=jdbc:mysql://localhost/test
jdbc.username=root
jdbc.password=root
6、创建model、dao、service
UserModel：
package com.demo.model;
public class UserModel {
private int id;
private String name;
private int age;
private String address;
//get set方法
}
UserDaoImpl:
package com.demo.dao.impl; import java.util.List; import org.mybatis.spring.support.SqlSessionDaoSupport; import com.demo.dao.UserDao;
import com.demo.model.UserModel; public class UserDaoImpl extends SqlSessionDaoSupport implements UserDao { public boolean insert(UserModel user) {
int count = getSqlSession().insert("insertUser", user);
if(count > 0) {
return true;
}
return false;
} public boolean update(UserModel user) {
return true;
} public boolean delete(String userid) {
return true;
} public UserModel getUser(int userid) {
List<UserModel> list = getSqlSession().selectList("selectUserById", userid);
return list != null && list.size() > 0 ? list.get(0) : null;
} public List<UserModel> getAllUser() {
// TODO Auto-generated method stub
return null;
} }
UserServiceImpl:
package com.demo.service.impl; import org.springframework.beans.factory.annotation.Autowired; import com.demo.dao.UserDao;
import com.demo.model.UserModel;
import com.demo.service.UserService; public class UserServiceImpl implements UserService { @Autowired
private UserDao userDao; public boolean insertUser(UserModel user) {
return userDao.insert(user);
} }
UserController:
package com.demo.controller; import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.servlet.ModelAndView; import com.demo.model.UserModel;
import com.demo.service.UserService; @Controller
@RequestMapping("/user/")
public class UserController {
@Autowired
private UserService userService; @RequestMapping("addUser.do")
public String addUser() {
return "addUser";
} @RequestMapping("saveUser.do")
public ModelAndView saveUser(UserModel userModel) {
ModelAndView mv = new ModelAndView();
boolean b = userService.insertUser(userModel);
if(b) {
mv.setViewName("addUserSuccess");
} else {
mv.setViewName("addUserFail");
}
return mv;
}
}
在applicationContext.xml中配置UserDao和UserService:
<bean id="userDao" class="com.demo.dao.impl.UserDaoImpl">
<property name="sqlSessionFactory" ref="sqlSessionFactory"></property>
</bean>
<bean id="userService" class="com.demo.service.impl.UserServiceImpl" />
在src/mybatis下创建User相关的数据库操作：
<? 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">
<mapper namespace="user"> <resultMap type="com.demo.model.UserModel" id="UserModel">
<result column="id" property="id" jdbcType="INTEGER"/>
<result column="name" property="name" jdbcType="VARCHAR"/>
<result column="age" property="age" jdbcType="INTEGER"/>
<result column="address" property="address" jdbcType="VARCHAR"/> </resultMap> <insert id="insertUser" parameterType="com.demo.model.UserModel">
insert into t_user(`name`,`age`,`address`) values(
#{name,jdbcType=VARCHAR},
#{age,jdbcType=INTEGER},
#{address,jdbcType=VARCHAR}
);
</insert> <select id="selectUserById" parameterType="INTEGER" resultMap="UserModel">
select `id`,`name`,`age`,`address` from t_user
where `id` = #{userid,jdbcType=INTEGER};
</select> <select id="selectAllUser" resultType="com.demo.model.UserModel">
select `id`,`name`,`age`,`address` from t_user
</select>
</mapper>
7、前台页面：
在WEB-INF/page下创建页面。该路径在sprng-servlet.xml中。
addUser.jsp内容例如以下：
<form action="${pageContext.request.contextPath }/user/saveUser.do">
<table>
<tr>
<td>姓名</td>
<td><input type="text" name="name" /></td>
</tr>
<tr>
<td>年龄</td>
<td><input type="text" name="age" /></td>
</tr>
<tr>
<td>地址</td>
<td><input type="text" name="address" /></td>
</tr>
<tr>
<td colspan="2">
<input type="submit" value="提交" />
</td>
</tr>
</table>
8、启动项目后，通过index.jsp訪问user/addUser.do进入addUser.jsp。输入信息点击提交。将信息插入到数据库，成功后。跳转至addSuccess.jsp
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