框架集成——SpringMVC与MyBatis集成(超详细)
SpringMVC与MyBatis是我们现在最流行的开发框架组合之一,这里我来整理一下框架的集成搭建过程
前言
使用IDE:IntelliJ IDEA
JDK:1.8
打开IDEA,新建maven工程
第一步:打开IDEA,点击Create New Project
第二步:
选择新建一个Maven项目,然后从Maven项目模板工具包中选择常用的[maven-archetype-webapp]模板
在这个项目里,有WEB-INF目录,并且有web.xml和一个index.jsp ,选中之后,点击next下一步
第三步:
输入maven的GroupId和ArtifactId,完成之后选择next
GroupID是项目组织唯一的标识符,实际对应JAVA的包的结构,是main目录里java的目录结构。
ArtifactID是项目的唯一的标识符,实际对应项目的名称,就是项目根目录的名称。
第四步:
查看maven相关配置(一般如果没什么问题,可直接跳过,进行下一步)
第五步:
设置项目的名称和存放目录,输入完成后,点击Finish完成
第六步:
完成之后,打开项目,初始化结构如图所示,(maven的pom.xml结构改变时,记得点击右下角出现的:Import Changes)
完善项目目录结构
我们看到,通过maven模板建立的项目结构并不是我们常用的,此时,我们需要进行一些添加
如果你新建的文件夹(比如java目录),没有被idea识别,你可以手动设置改变文件夹属性,操作如下
编辑maven的pom.xml文件,设置项目建造和引入相关依赖
我的pom.xml文件如下,具体写在注释里了
<?xml version="1.0" encoding="UTF-8"?>
<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/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>com.sample.ssm</groupId>
<artifactId>sample-web</artifactId>
<version>1.0-SNAPSHOT</version>
<packaging>war</packaging>
<properties>
<maven.compiler.source>1.8</maven.compiler.source>
<maven.compiler.target>1.8</maven.compiler.target>
<spring-version>4.2.3.RELEASE</spring-version>
</properties>
<dependencies>
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>4.11</version>
<scope>test</scope>
</dependency>
<!-- java日志: slf4j,log4j,logback,common-looging slf4j是规范/接口 使用:slf4j,logback start-->
<dependency>
<groupId>org.slf4j</groupId>
<artifactId>slf4j-api</artifactId>
<version>1.7.7</version>
</dependency>
<dependency>
<groupId>ch.qos.logback</groupId>
<artifactId>logback-core</artifactId>
<version>1.1.7</version>
</dependency>
<!-- 实现slf4j接口并整合 -->
<dependency>
<groupId>ch.qos.logback</groupId>
<artifactId>logback-classic</artifactId>
<version>1.1.7</version>
</dependency>
<!-- java日志: slf4j,log4j,logback,common-looging slf4j是规范/接口 使用:slf4j,logback end-->
<!--Servlet相关 start-->
<dependency>
<groupId>javax.servlet</groupId>
<artifactId>javax.servlet-api</artifactId>
<version>3.1.0</version>
</dependency>
<dependency>
<groupId>javax.servlet.jsp</groupId>
<artifactId>jsp-api</artifactId>
<version>2.2</version>
</dependency>
<dependency>
<groupId>taglibs</groupId>
<artifactId>standard</artifactId>
<version>1.1.2</version>
</dependency>
<dependency>
<groupId>jstl</groupId>
<artifactId>jstl</artifactId>
<version>1.2</version>
</dependency>
<!--Servlet相关 end-->
<!-- Json 相关 start-->
<dependency>
<groupId>com.alibaba</groupId>
<artifactId>fastjson</artifactId>
<version>1.2.38</version>
</dependency>
<!-- Json 相关 end-->
<!--Spring相关 start-->
<!-- Sping核心依赖 start-->
<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-context</artifactId>
<version>${spring-version}</version>
</dependency>
<!-- Sping核心依赖 end-->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-web</artifactId>
<version>${spring-version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-webmvc</artifactId>
<version>${spring-version}</version>
</dependency>
<!-- Sping Test相关依赖 -->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-test</artifactId>
<version>${spring-version}</version>
</dependency>
<!--Spring相关 end-->
<dependency>
<groupId>org.hibernate</groupId>
<artifactId>hibernate-validator</artifactId>
<version>5.4.1.Final</version>
</dependency>
<!-- 数据库相关的依赖 start-->
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<version>5.1.6</version>
</dependency>
<dependency>
<groupId>com.alibaba</groupId>
<artifactId>druid</artifactId>
<version>1.0.15</version>
</dependency>
<!-- DAO框架:MyBatis依赖 -->
<dependency>
<groupId>org.mybatis</groupId>
<artifactId>mybatis</artifactId>
<version>3.3.0</version>
</dependency>
<dependency>
<groupId>com.github.pagehelper</groupId>
<artifactId>pagehelper</artifactId>
<version>4.0.1</version>
</dependency>
<!-- Mybatis自身实现的Spring整合依赖 -->
<dependency>
<groupId>org.mybatis</groupId>
<artifactId>mybatis-spring</artifactId>
<version>1.2.3</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-tx</artifactId>
<version>${spring-version}</version>
</dependency>
<!-- https://mvnrepository.com/artifact/cglib/cglib -->
<dependency>
<groupId>cglib</groupId>
<artifactId>cglib</artifactId>
<version>3.2.4</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-jdbc</artifactId>
<version>${spring-version}</version>
</dependency>
<!-- 数据库相关的依赖 end-->
<!--mybatis自动化mapper插件tk.mybatis start-->
<dependency>
<groupId>tk.mybatis</groupId>
<artifactId>mapper</artifactId>
<version>3.3.9</version>
</dependency>
<!--mybatis自动化mapper插件tk.mybatis end-->
<!--mybatis.generator start-->
<dependency>
<groupId>org.mybatis.generator</groupId>
<artifactId>mybatis-generator-core</artifactId>
<version>1.3.3</version>
</dependency>
<!--mybatis.generator end-->
</dependencies>
<build>
<finalName>sample-admin</finalName>
<resources>
<resource>
<directory>src/main/java</directory>
<includes>
<include>**/*.properties</include>
<include>**/*.xml</include>
</includes>
<filtering>false</filtering>
</resource>
<resource>
<directory>src/main/resources</directory>
<excludes>
<exclude>generator*.*</exclude>
</excludes>
</resource>
</resources>
<plugins>
<!--mybatis自动生成实体代码的插件-->
<plugin>
<groupId>org.mybatis.generator</groupId>
<artifactId>mybatis-generator-maven-plugin</artifactId>
<version>1.3.3</version>
<configuration>
<configurationFile>src/main/resources/generatorConfig.xml</configurationFile>
<verbose>true</verbose>
<overwrite>true</overwrite>
</configuration>
<dependencies>
<dependency>
<groupId>org.mybatis.generator</groupId>
<artifactId>mybatis-generator-core</artifactId>
<version>1.3.3</version>
</dependency>
<dependency>
<groupId>tk.mybatis</groupId>
<artifactId>mapper</artifactId>
<version>3.3.9</version>
</dependency>
</dependencies>
</plugin>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-surefire-plugin</artifactId>
<version>2.19</version>
<configuration>
<!-- 跳过maven的Test -->
<skip>true</skip>
<argLine>-Dfile.encoding=UTF-8</argLine>
</configuration>
</plugin>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
<version>3.1</version>
<configuration>
<source>1.8</source>
<target>1.8</target>
<encoding>utf8</encoding>
</configuration>
</plugin>
</plugins>
</build>
</project>
配置Spring,并且集成MyBatis
我们需要集成SpringMVC与MyBatis,所以,我们从ORM框架开始集成,最后在组建Spring MVC,一步一步来,不容易出错。Spring相关的文件这里统一放在resources的spring文件夹下。集成MyBatis的文件为spring-dao.xml,其中需要配置文件:mybatis-config.xml和单独提出数据库连接信息存放文件:jdbc.properties(记得修改自己的数据库连接信息)
spring-dao.xml
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns="http://www.springframework.org/schema/beans"
xsi:schemaLocation="http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans-4.0.xsd ">
<!-- 配置整合Mybatis过程 -->
<!-- 配置数据库相关参数 properties的属性:${url} -->
<!--<context:property-placeholder location="classpath:jdbc.properties"/>-->
<bean id="propertyPlaceholderConfigurer" class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer">
<property name="locations">
<list>
<!-- dataSourse连接池相关属性 -->
<value>classpath:jdbc.properties</value>
</list>
</property>
</bean>
<!--2.配置连接池属性 -->
<!-- 数据源配置, 使用 Druid 数据库连接池 -->
<bean id="dataSource" class="com.alibaba.druid.pool.DruidDataSource"
init-method="init" destroy-method="close">
<!-- 数据源驱动类可不写,Druid默认会自动根据URL识别DriverClass -->
<property name="driverClassName" value="${jdbc.driver}"/>
<!-- 基本属性 url、user、password -->
<property name="url" value="${jdbc.url}"/>
<property name="username" value="${jdbc.username}"/>
<property name="password" value="${jdbc.password}"/>
<!-- 配置初始化大小、最小、最大 -->
<property name="initialSize" value="${jdbc.pool.init}"/>
<property name="minIdle" value="${jdbc.pool.minIdle}"/>
<property name="maxActive" value="${jdbc.pool.maxActive}"/>
<!-- 配置获取连接等待超时的时间 -->
<property name="maxWait" value="60000"/>
<!-- 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="validationQuery" value="${jdbc.testSql}"/>
<property name="testWhileIdle" value="true"/>
<property name="testOnBorrow" value="false"/>
<property name="testOnReturn" value="false"/>
<!-- 打开PSCache,并且指定每个连接上PSCache的大小(Oracle使用) -->
<!-- <property name="poolPreparedStatements"
value="true"/>
<property name="maxPoolPreparedStatementPerConnectionSize"
value="20"/>-->
<!-- 配置监控统计拦截的filters -->
<property name="filters" value="stat"/>
</bean>
<!--3.配置SqlSessionFactory对象 -->
<bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
<!--注入数据库连接池 -->
<property name="dataSource" ref="dataSource"/>
<!--配置mybatis全局配置文件:mybatis-config.xml -->
<property name="configLocation" value="classpath:mybatis-config.xml"/>
<!--扫描entity包,使用别名,多个用;隔开 -->
<property name="typeAliasesPackage" value="entity"/>
<!--扫描sql配置文件:mapper需要的xml文件 -->
<property name="mapperLocations" value="classpath:mapper/*.xml"/>
<property name="plugins">
<array>
<bean class="com.github.pagehelper.PageHelper">
<property name="properties">
<value>
dialect=mysql
</value>
</property>
</bean>
</array>
</property>
</bean>
<bean class="tk.mybatis.spring.mapper.MapperScannerConfigurer">
<property name="basePackage" value="com.sample.ssm.mapper"/>
<property name="properties">
<value>
mappers=tk.mybatis.mapper.common.Mapper
</value>
</property>
</bean>
</beans>
jdbc.properties
#jdbc settings
jdbc.driver=com.mysql.jdbc.Driver
jdbc.url=jdbc:mysql://127.0.0.1/sample-web?useUnicode=true&characterEncoding=utf-8
jdbc.username=root
jdbc.password=12345
#pool settings
jdbc.pool.init=1
jdbc.pool.minIdle=3
jdbc.pool.maxActive=20
#jdbc.testSql=SELECT 'x'
jdbc.testSql=SELECT 'x' FROM DUAL
mybatis-config.xml
<?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>
<!--配置全局属性-->
<settings>
<!--使用jdbc的getGeneratekeys获取自增主键值-->
<setting name="useGeneratedKeys" value="true"/>
<!--使用列别名替换别名 默认true
select name as title form table;
-->
<setting name="useColumnLabel" value="true"/>
<!--开启驼峰命名转换-->
<setting name="mapUnderscoreToCamelCase" value="true"/>
<!--打印sql日志-->
<setting name="logImpl" value="STDOUT_LOGGING" />
</settings>
</configuration>
构建数据结构
我们需要一个简单的数据进行测试,这里我就建立一张user_info表吧,
/*
Navicat MySQL Data Transfer
Source Server : 本地
Source Server Version : 50557
Source Host : 127.0.0.1:3306
Source Database : sample-web
Target Server Type : MYSQL
Target Server Version : 50557
File Encoding : 65001
Date: 2018-08-24 09:31:45
*/
SET FOREIGN_KEY_CHECKS=0;
-- ----------------------------
-- Table structure for user_info
-- ----------------------------
DROP TABLE IF EXISTS `user_info`;
CREATE TABLE `user_info` (
`user_id` int(11) NOT NULL AUTO_INCREMENT,
`user_name` varchar(255) NOT NULL,
PRIMARY KEY (`user_id`,`user_name`)
) ENGINE=InnoDB AUTO_INCREMENT=3 DEFAULT CHARSET=utf8;
-- ----------------------------
-- Records of user_info
-- ----------------------------
INSERT INTO `user_info` VALUES ('1', '用户1');
INSERT INTO `user_info` VALUES ('2', '用户2');
MyBatis集成完成后,进行调试
在框架的集成过程中,我们得一步一步来,保证每一步都不会出错才能顺利得进行下去。现在,我们对user_info这个字段进行操作,主要是:建立实体类UserInfo.java,建立Mapper类,UserInfoMapper.java,建立映射文件UserInfoMapper.xml,具体分别如下:
UserInfo.java
package com.sample.ssm.model;
/**
* @author yuyufeng
* @date 2018/8/24.
*/
public class UserInfo {
private Integer userId;
private String userName;
public Integer getUserId() {
return userId;
}
public void setUserId(Integer userId) {
this.userId = userId;
}
public String getUserName() {
return userName;
}
public void setUserName(String userName) {
this.userName = userName;
}
@Override
public String toString() {
return "UserInfo{" +
"userId=" + userId +
", userName='" + userName + '\'' +
'}';
}
}
UserInfoMapper.java
package com.sample.ssm.mapper;
import com.sample.ssm.model.UserInfo;
import org.apache.ibatis.annotations.Param;
/**
* @author yuyufeng
* @date 2018/8/24.
*/
public interface UserInfoMapper {
/**
* 根据ID获取单个对象
* @param userId
* @return
*/
UserInfo selectOne(@Param("userId") Integer userId);
}
UserInfoMapper.xml
<?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="com.sample.ssm.mapper.UserInfoMapper">
<resultMap id="BaseResultMap" type="com.sample.ssm.model.UserInfo">
<id column="user_id" jdbcType="INTEGER" property="userId" />
<result column="user_name" jdbcType="VARCHAR" property="userName" />
</resultMap>
<sql id="Base_Column_List">
<!--
WARNING - @mbg.generated
-->
user_id, user_name
</sql>
<select id="selectOne" resultType="com.sample.ssm.model.UserInfo">
SELECT user_id, user_name FROM user_info WHERE user_id = #{userId,jdbcType=INTEGER}
</select>
</mapper>
目前项目的结构如上图所示。
接着,我们需要使用Junit结合Spring进行调试:
在test目录下建立UserInfoMapperTest.java
package com.sample.ssm.mapper;
import com.sample.ssm.model.UserInfo;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.test.context.ContextConfiguration;
import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;
/**
* @author yuyufeng
* @date 2018/8/24.
*/
@RunWith(SpringJUnit4ClassRunner.class)
@ContextConfiguration({"classpath:spring/spring-dao.xml"})
public class UserInfoMapperTest {
@Autowired
private UserInfoMapper userInfoMapper;
@Test
public void testSelectOne(){
UserInfo userInfo = userInfoMapper.selectOne(1);
System.out.println(userInfo);
}
}
执行调试debug:
返回结果如下图所示:
到这里,我们已经成功集成Spring+MyBatis了
集成Spring MVC
首先,我们还是在xml进行一些Spring MVC的基础配置,具体内容写在注释里
spring-web.xml
<?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:mvc="http://www.springframework.org/schema/mvc"
xmlns:context="http://www.springframework.org/schema/context"
xsi:schemaLocation="http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans-4.0.xsd http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd">
<context:component-scan base-package="com.sample.ssm.action"></context:component-scan>
<!--配置springmvc -->
<!--1:开始SpringMVC注解模式 -->
<!--简化配置: -->
<!--1)自动注册DefaultAnnotationHandlerMapping,AnnotationMethodHandlerAdapter -->
<!--2)提供一些列:数据绑定,数字和日期的format @NumberFormat @DataTimeFormart,xml,json 默认读写支持。 -->
<!-- 类型转化 -->
<bean id="conversionService"
class="org.springframework.format.support.FormattingConversionServiceFactoryBean">
</bean>
<!-- 校验器 -->
<bean id="validator"
class="org.springframework.validation.beanvalidation.LocalValidatorFactoryBean">
<!-- hibernate校验器 -->
<property name="providerClass" value="org.hibernate.validator.HibernateValidator"/>
<!-- 指定校验使用的资源文件,在文件中配置校验错误信息,如果不指定则默认使用classpath下的ValidationMessages.properties -->
<property name="validationMessageSource" ref="messageSource" />
</bean>
<bean id="messageSource" class="org.springframework.context.support.ReloadableResourceBundleMessageSource">
<property name="useCodeAsDefaultMessage" value="false"/>
<property name="defaultEncoding" value="UTF-8"/>
</bean>
<!-- Enables the Spring MVC @Controller programming model -->
<mvc:annotation-driven conversion-service="conversionService"
validator="validator">
<mvc:message-converters register-defaults="true">
<!-- 将Jackson2HttpMessageConverter的默认格式化输出为true -->
<!-- 配置Fastjson支持 -->
<bean class="com.alibaba.fastjson.support.spring.FastJsonHttpMessageConverter">
<property name="supportedMediaTypes">
<list>
<value>application/json</value>
<value>text/html;charset=UTF-8</value>
</list>
</property>
<property name="features">
<list>
<!--<value>WriteMapNullValue</value>-->
<value>QuoteFieldNames</value>
</list>
</property>
</bean>
</mvc:message-converters>
</mvc:annotation-driven>
<context:component-scan base-package="com.sample.ssm.action"/>
<!--2.静态资源默认servlet配置 -->
<!-- 1).加入对静态资源处理:js,gif,png 2).允许使用 "/" 做整体映射 -->
<mvc:default-servlet-handler/>
<mvc:resources location="/static/" mapping="/static/**"/>
<!--3:配置JSP 显示ViewResolver -->
<bean
class="org.springframework.web.servlet.view.InternalResourceViewResolver">
<property name="viewClass"
value="org.springframework.web.servlet.view.JstlView"/>
<property name="prefix" value="/WEB-INF/jsp/"/>
<property name="suffix" value=".jsp"/>
</bean>
<!--拦截器 -->
<!-- <mvc:interceptors>
<mvc:interceptor>
<mvc:mapping path="/**"/>
<bean class="com.sample.ssm.interceptor.RootInterceptor"></bean>
</mvc:interceptor>
</mvc:interceptors>-->
<bean class="org.springframework.web.servlet.handler.SimpleMappingExceptionResolver">
<!-- 定义默认的异常处理页面,当该异常类型的注册时使用 -->
<property name="defaultErrorView" value="success"></property>
<!-- 定义异常处理页面用来获取异常信息的变量名,默认名为exception -->
<property name="exceptionAttribute" value="message"></property>
</bean>
</beans>
接着,我们需要在web项目启动的时候去加载这些Spring配置文件,打开web.xml,常用配置如下
web.xml
<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns="http://xmlns.jcp.org/xml/ns/javaee"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee
http://xmlns.jcp.org/xml/ns/javaee/web-app_3_1.xsd"
version="3.1"
metadata-complete="false">
<display-name>sample-web</display-name>
<!-- post乱码过虑器 start-->
<filter>
<filter-name>encodingFilter</filter-name>
<filter-class>org.springframework.web.filter.CharacterEncodingFilter</filter-class>
<init-param>
<param-name>encoding</param-name>
<param-value>UTF-8</param-value>
</init-param>
<init-param>
<param-name>forceEncoding</param-name>
<param-value>true</param-value>
</init-param>
</filter>
<filter-mapping>
<filter-name>encodingFilter</filter-name>
<url-pattern>/*</url-pattern>
</filter-mapping>
<!-- post乱码过虑器 end-->
<!--配置DispatcherServlet -->
<servlet>
<servlet-name>spring-mvc</servlet-name>
<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
<!-- 配置SpringMVC 需要配置的文件-->
<init-param>
<param-name>contextConfigLocation</param-name>
<param-value>classpath:spring/spring-*.xml</param-value>
</init-param>
</servlet>
<servlet-mapping>
<servlet-name>spring-mvc</servlet-name>
<!--默认匹配所有请求 -->
<url-pattern>/</url-pattern>
</servlet-mapping>
</web-app>
建立Controller和jsp
UserController.class
package com.sample.ssm.action;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
/**
* @author yuyufeng
* @date 2018/8/24.
*/
@Controller
public class UserController {
@RequestMapping("/user")
private String toUser(){
return "user";
}
}
WEB-INF/jsp/user.jsp
<%--
Created by IntelliJ IDEA.
User: yuyufeng
Date: 2018/8/24
Time: 10:01
To change this template use File | Settings | File Templates.
--%>
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
<title>用户信息</title>
</head>
<body>
<h1>Hello 你好</h1>
</body>
</html>
配置Tomcat
第一步:选择编辑配置
第二步:选择使用过Tomcat
第三步:配置Tomcat信息
第四步:部署war包到Tomcat下
选择exploded版本可以在运行过程中进行编译
设置及时更新class文件,为了调试时编译
第五步:点击debug启动tomcat
启动成功后,打开浏览器,输入http://127.0.0.1:8080/user,打开网页,访问到如下图,
此时此刻,Spring MVC已经部署完毕;
SpringMVC 与 MyBatis的使用
接下来,我们就要在Controller中使用Spring中已经集成的MyBatis了,在此,我们可以构建常用的目录,加入Service层
在service中,我们经常使用Spring集成的事务,此时,我们增加一个Spring配置
spring-service.xml
<?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"
xmlns:tx="http://www.springframework.org/schema/tx"
xsi:schemaLocation="
http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans-4.0.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context-4.0.xsd
http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-4.0.xsd">
<context:component-scan base-package="com.sample.ssm.service.impl"></context:component-scan>
<!--配置事务管理器(mybatis采用的是JDBC的事务管理器)-->
<bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
<property name="dataSource" ref="dataSource"></property>
</bean>
<!--配置基于注解的声明式事务,默认使用注解来管理事务行为-->
<tx:annotation-driven transaction-manager="transactionManager"/>
</beans>
此时的目录结构:
现在,我们建立Service类,IUserService.java,UserServiceImpl.java
IUserService.java
package com.sample.ssm.service;
import com.sample.ssm.model.UserInfo;
/**
* @author yuyufeng
* @date 2018/8/24.
*/
public interface IUserService {
/**
* 根据userId获取用户
* @param userId
* @return
*/
UserInfo getUserInfoByUserId(Integer userId);
}
UserServiceImpl.java
package com.sample.ssm.service.impl;
import com.sample.ssm.mapper.UserInfoMapper;
import com.sample.ssm.model.UserInfo;
import com.sample.ssm.service.IUserService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
/**
* @author yuyufeng
* @date 2018/8/24.
*/
@Service
public class UserServiceImpl implements IUserService{
@Autowired
private UserInfoMapper userInfoMapper;
@Override
public UserInfo getUserInfoByUserId(Integer userId) {
return userInfoMapper.selectOne(userId);
}
}
接着,在Controller中引用,
package com.sample.ssm.action;
import com.sample.ssm.model.UserInfo;
import com.sample.ssm.service.IUserService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.RequestMapping;
/**
* @author yuyufeng
* @date 2018/8/24.
*/
@Controller
public class UserController {
@Autowired
private IUserService userService;
@RequestMapping("/user")
private String toUser(Model model,Integer userId){
UserInfo userInfo = userService.getUserInfoByUserId(userId);
model.addAttribute("user", userInfo);
return "user";
}
}
在jsp中,使用EL表达式接收:
<%--
Created by IntelliJ IDEA.
User: yuyufeng
Date: 2018/8/24
Time: 10:01
To change this template use File | Settings | File Templates.
--%>
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
<title>用户信息</title>
</head>
<body>
<h1>Hello 你好</h1>
<p>用户ID:${user.userId}</p>
<p>用户NAME:${user.userName}</p>
</body>
</html>
编辑完成后,重启Tomcat,打开地址http://127.0.0.1:8080/user?userId=1,效果如下
到这里,SpringMVC与MyBatis集成基础已经完成,已经可以进行基本的开发了。至于更细的操作,比如使用generator生成Java代码,使用TKMybatis减少MyBatis开发过程中的代码编写,JSP项目的页面便于开发的结构等,都将集成在此项目的版本中,请待今后的文章更新吧。
代码地址:https://github.com/yuyufeng1994/sample-web-ssm/tree/v1