框架整合——SpringMVC與MyBatis整合(超詳細)
SpringMVC與MyBatis是我們現在最流行的開發框架組合之一,這裡我來整理一下框架的整合搭建過程
前言
使用IDE:IntelliJ IDEA
JDK:1.8
開啟IDEA,新建maven工程
第一步:開啟IDEA,點選Create New Project
第二步:
選擇新建一個Maven專案,然後從Maven專案模板工具包中選擇常用的[maven-archetype-webapp]模板
在這個專案裡,有WEB-INF目錄,並且有web.xml和一個index.jsp ,選中之後,點選next下一步
第三步:
輸入maven的GroupId和ArtifactId,完成之後選擇next
GroupID是專案組織唯一的識別符號,實際對應JAVA的包的結構,是main目錄裡java的目錄結構。
ArtifactID是專案的唯一的識別符號,實際對應專案的名稱,就是專案根目錄的名稱。
第四步:
檢視maven相關配置(一般如果沒什麼問題,可直接跳過,進行下一步)
第五步:
設定專案的名稱和存放目錄,輸入完成後,點選Finish完成
第六步:
完成之後,開啟專案,初始化結構如圖所示,(maven的pom.xml結構改變時,記得點選右下角出現的:Import Changes)
完善專案目錄結構
我們看到,通過maven模板建立的專案結構並不是我們常用的,此時,我們需要進行一些新增
如果你新建的資料夾(比如java目錄),沒有被idea識別,你可以手動設定改變資料夾屬性,操作如下
編輯maven的pom.xml檔案,設定專案建造和引入相關依賴
我的pom.xml檔案如下,具體寫在註釋裡了
<?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日誌: slf4j,log4j,logback,common-looging slf4j是規範/介面 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> <!-- 實現slf4j介面並整合 --> <dependency> <groupId>ch.qos.logback</groupId> <artifactId>logback-classic</artifactId> <version>1.1.7</version> </dependency> <!-- java日誌: slf4j,log4j,logback,common-looging slf4j是規範/介面 使用:slf4j,logback end--> <!--Servlet相關 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相關 end--> <!-- Json 相關 start--> <dependency> <groupId>com.alibaba</groupId> <artifactId>fastjson</artifactId> <version>1.2.38</version> </dependency> <!-- Json 相關 end--> <!--Spring相關 start--> <!-- Sping核心依賴 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>${spring-version}</version> </dependency> <!-- Sping核心依賴 end--> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-web</artifactId> <version>${spring-version}</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-webmvc</artifactId> <version>${spring-version}</version> </dependency> <!-- Sping Test相關依賴 --> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-test</artifactId> <version>${spring-version}</version> </dependency> <!--Spring相關 end--> <dependency> <groupId>org.hibernate</groupId> <artifactId>hibernate-validator</artifactId> <version>5.4.1.Final</version> </dependency> <!-- 資料庫相關的依賴 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依賴 --> <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自身實現的Spring整合依賴 --> <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> <!-- 資料庫相關的依賴 end--> <!--mybatis自動化mapper外掛tk.mybatis start--> <dependency> <groupId>tk.mybatis</groupId> <artifactId>mapper</artifactId> <version>3.3.9</version> </dependency> <!--mybatis自動化mapper外掛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自動生成實體程式碼的外掛--> <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> <!-- 跳過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,並且整合MyBatis
我們需要整合SpringMVC與MyBatis,所以,我們從ORM框架開始整合,最後在組建Spring MVC,一步一步來,不容易出錯。Spring相關的檔案這裡統一放在resources的spring資料夾下。整合MyBatis的檔案為spring-dao.xml,其中需要配置檔案:mybatis-config.xml和單獨提出資料庫連線資訊存放檔案:jdbc.properties(記得修改自己的資料庫連線資訊)
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過程 -->
<!-- 配置資料庫相關引數 properties的屬性:${url} -->
<!--<context:property-placeholder location="classpath:jdbc.properties"/>-->
<bean id="propertyPlaceholderConfigurer" class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer">
<property name="locations">
<list>
<!-- dataSourse連線池相關屬性 -->
<value>classpath:jdbc.properties</value>
</list>
</property>
</bean>
<!--2.配置連線池屬性 -->
<!-- 資料來源配置, 使用 Druid 資料庫連線池 -->
<bean id="dataSource" class="com.alibaba.druid.pool.DruidDataSource"
init-method="init" destroy-method="close">
<!-- 資料來源驅動類可不寫,Druid預設會自動根據URL識別DriverClass -->
<property name="driverClassName" value="${jdbc.driver}"/>
<!-- 基本屬性 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}"/>
<!-- 配置獲取連線等待超時的時間 -->
<property name="maxWait" value="60000"/>
<!-- 配置間隔多久才進行一次檢測,檢測需要關閉的空閒連線,單位是毫秒 -->
<property name="timeBetweenEvictionRunsMillis" value="60000"/>
<!-- 配置一個連線在池中最小生存的時間,單位是毫秒 -->
<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"/>
<!-- 開啟PSCache,並且指定每個連線上PSCache的大小(Oracle使用) -->
<!-- <property name="poolPreparedStatements"
value="true"/>
<property name="maxPoolPreparedStatementPerConnectionSize"
value="20"/>-->
<!-- 配置監控統計攔截的filters -->
<property name="filters" value="stat"/>
</bean>
<!--3.配置SqlSessionFactory物件 -->
<bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
<!--注入資料庫連線池 -->
<property name="dataSource" ref="dataSource"/>
<!--配置mybatis全域性配置檔案:mybatis-config.xml -->
<property name="configLocation" value="classpath:mybatis-config.xml"/>
<!--掃描entity包,使用別名,多個用;隔開 -->
<property name="typeAliasesPackage" value="entity"/>
<!--掃描sql配置檔案:mapper需要的xml檔案 -->
<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>
<!--配置全域性屬性-->
<settings>
<!--使用jdbc的getGeneratekeys獲取自增主鍵值-->
<setting name="useGeneratedKeys" value="true"/>
<!--使用列別名替換別名 預設true
select name as title form table;
-->
<setting name="useColumnLabel" value="true"/>
<!--開啟駝峰命名轉換-->
<setting name="mapUnderscoreToCamelCase" value="true"/>
<!--列印sql日誌-->
<setting name="logImpl" value="STDOUT_LOGGING" />
</settings>
</configuration>
構建資料結構
我們需要一個簡單的資料進行測試,這裡我就建立一張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', '使用者1');
INSERT INTO `user_info` VALUES ('2', '使用者2');
MyBatis整合完成後,進行除錯
在框架的整合過程中,我們得一步一步來,保證每一步都不會出錯才能順利得進行下去。現在,我們對user_info這個欄位進行操作,主要是:建立實體類UserInfo.java,建立Mapper類,UserInfoMapper.java,建立對映檔案UserInfoMapper.xml,具體分別如下:
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 {
/**
* 根據ID獲取單個物件
* @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>
目前專案的結構如上圖所示。
接著,我們需要使用Junit結合Spring進行除錯:
在test目錄下建立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);
}
}
執行除錯debug:
返回結果如下圖所示:
到這裡,我們已經成功整合Spring+MyBatis了
整合Spring MVC
首先,我們還是在xml進行一些Spring MVC的基礎配置,具體內容寫在註釋裡
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:開始SpringMVC註解模式 -->
<!--簡化配置: -->
<!--1)自動註冊DefaultAnnotationHandlerMapping,AnnotationMethodHandlerAdapter -->
<!--2)提供一些列:資料繫結,數字和日期的format @NumberFormat @DataTimeFormart,xml,json 預設讀寫支援。 -->
<!-- 型別轉化 -->
<bean id="conversionService"
class="org.springframework.format.support.FormattingConversionServiceFactoryBean">
</bean>
<!-- 校驗器 -->
<bean id="validator"
class="org.springframework.validation.beanvalidation.LocalValidatorFactoryBean">
<!-- hibernate校驗器 -->
<property name="providerClass" value="org.hibernate.validator.HibernateValidator"/>
<!-- 指定校驗使用的資原始檔,在檔案中配置校驗錯誤資訊,如果不指定則預設使用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">
<!-- 將Jackson2HttpMessageConverter的預設格式化輸出為true -->
<!-- 配置Fastjson支援 -->
<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.靜態資源預設servlet配置 -->
<!-- 1).加入對靜態資源處理:js,gif,png 2).允許使用 "/" 做整體對映 -->
<mvc:default-servlet-handler/>
<mvc:resources location="/static/" mapping="/static/**"/>
<!--3:配置JSP 顯示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>
<!--攔截器 -->
<!-- <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">
<!-- 定義預設的異常處理頁面,當該異常型別的註冊時使用 -->
<property name="defaultErrorView" value="success"></property>
<!-- 定義異常處理頁面用來獲取異常資訊的變數名,預設名為exception -->
<property name="exceptionAttribute" value="message"></property>
</bean>
</beans>
接著,我們需要在web專案啟動的時候去載入這些Spring配置檔案,開啟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亂碼過慮器 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亂碼過慮器 end-->
<!--配置DispatcherServlet -->
<servlet>
<servlet-name>spring-mvc</servlet-name>
<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
<!-- 配置SpringMVC 需要配置的檔案-->
<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>
<!--預設匹配所有請求 -->
<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>使用者資訊</title>
</head>
<body>
<h1>Hello 你好</h1>
</body>
</html>
配置Tomcat
第一步:選擇編輯配置
第二步:選擇使用過Tomcat
第三步:配置Tomcat資訊
第四步:部署war包到Tomcat下
選擇exploded版本可以在執行過程中進行編譯
設定及時更新class檔案,為了除錯時編譯
第五步:點選debug啟動tomcat
啟動成功後,開啟瀏覽器,輸入http://127.0.0.1:8080/user,開啟網頁,訪問到如下圖,
此時此刻,Spring MVC已經部署完畢;
SpringMVC 與 MyBatis的使用
接下來,我們就要在Controller中使用Spring中已經整合的MyBatis了,在此,我們可以構建常用的目錄,加入Service層
在service中,我們經常使用Spring整合的事務,此時,我們增加一個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>
<!--配置事務管理器(mybatis採用的是JDBC的事務管理器)-->
<bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
<property name="dataSource" ref="dataSource"></property>
</bean>
<!--配置基於註解的宣告式事務,預設使用註解來管理事務行為-->
<tx:annotation-driven transaction-manager="transactionManager"/>
</beans>
此時的目錄結構:
現在,我們建立Service類,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 {
/**
* 根據userId獲取使用者
* @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);
}
}
接著,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表示式接收:
<%--
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>使用者資訊</title>
</head>
<body>
<h1>Hello 你好</h1>
<p>使用者ID:${user.userId}</p>
<p>使用者NAME:${user.userName}</p>
</body>
</html>
編輯完成後,重啟Tomcat,開啟地址http://127.0.0.1:8080/user?userId=1,效果如下
到這裡,SpringMVC與MyBatis整合基礎已經完成,已經可以進行基本的開發了。至於更細的操作,比如使用generator生成Java程式碼,使用TKMybatis減少MyBatis開發過程中的程式碼編寫,JSP專案的頁面便於開發的結構等,都將整合在此專案的版本中,請待今後的文章更新吧。
程式碼地址:https://github.com/yuyufeng1994/sample-web-ssm/tree/v1