項目地址:https://github.com/LiuYuanZhe/springmvc-ssm
實習以來,一直在用springmvc,但是從來沒有自己搭建過一個項目,特別是一直在用jpa做簡單的加載,數據庫也一般是在使用es,redis,hbase這些,沒有用到hibernate和mybatis這兩個主流的數據庫映射框架,現在就來自己搭一個idea搭建起來的,坐落在tomcat上的demo。---idea真是好用到飛起,就是有一些配置不太好配,不錯coding事非常好用啊!!!
springmvc加載起來有兩個容器,分別是spring的父容器和springmvc的子容器,要區分好兩個容器的配置。
首先,建立一個maven的webapp項目,在pom中配置相應的依賴,需要spring,springmvc,jdbc,jstl,mybatis,springmybatis等依賴,就不詳細寫了。
這是項目的包結構。
web.xml的配置
<?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_2_5.xsd"
id="WebApp_ID" version="2.5">
<display-name>Archetype Created Web Application</display-name>
<filter><!--解決編碼問題-->
<filter-name>characterEncodingFilter</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>
</filter>
<filter-mapping>
<filter-name>characterEncodingFilter</filter-name>
<url-pattern>/*</url-pattern>
</filter-mapping>
<!--配置dispatcherservlet前端控制器,向後端分發請求-->
<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:spring/springmvc.xml</param-value>
</init-param>
</servlet>
<!--配置springmvc攔截器攔截後綴名爲action的請求-->
<servlet-mapping>
<servlet-name>springmvc</servlet-name>
<url-pattern>*.action</url-pattern>
</servlet-mapping>
<!--監聽器加載spring和springmvc的父子容器配置文件-->
<listener>
<listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
</listener>
<context-param>
<param-name>contextConfigLocation</param-name>
<param-value>classpath:spring/applicationContext-*.xml</param-value>
</context-param>
</web-app>
在裏面配置好攔截器,和加載好配置文件,攔截器等。
sprinmvc.xml文件:
<?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:aop="http://www.springframework.org/schema/aop"
xmlns:mvc="http://www.springframework.org/schema/mvc"
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
http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop.xsd
http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc.xsd">
<mvc:annotation-driven></mvc:annotation-driven>
<!--註解掃包-->
<context:component-scan base-package="com.sdust.ssm.controller"></context:component-scan>
<!--視圖解析器-->
<!--配置前端頁面的後綴以及目錄-->
<bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
<property name="prefix" value="/WEB-INF/jsp/"></property>
<property name="suffix" value=".jsp"></property>
</bean>
<!--處理器適配器-->
<bean class="org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerMapping"></bean>
<bean id="validatorFactoryBean" class="org.springframework.validation.beanvalidation.LocalValidatorFactoryBean">
<!--hibernate校驗器-->
<property name="providerClass" value="org.hibernate.validator.HibernateValidator"></property>
<!--指定校驗使用的資源文件,在文件中配置校驗錯誤信息-->
<!--<property name="validationMessageSource" ref="messageSource"></property>-->
</bean>
<!--錯誤文件信息-->
<!--<bean id="messageSource" class="org.springframework.context.support.ReloadableResourceBundleMessageSource">-->
<!--<!–資源文件名–>-->
<!--<property name="basenames">-->
<!--<list>-->
<!--<value>classpath:ValidationMessage</value>-->
<!--</list>-->
<!--</property>-->
<!--<!–資源文件編碼格式–>-->
<!--<property name="defaultEncoding" value="UTF-8"></property>-->
<!--<!–對資源文件緩存時間–>-->
<!--<property name="cacheSeconds" value="120"></property>-->
<!--</bean>-->
<!--配置多部件類型解析器-->
<bean id="multipartResolver" class="org.springframework.web.multipart.commons.CommonsMultipartResolver">
<!--設置上傳圖片大小-->
<property name="maxUploadSize" value="5242880"></property>
</bean>
<!--<mvc:interceptors>-->
<!--<mvc:interceptor>-->
<!--<mvc:mapping path=""/>-->
<!--<-->
<!--</mvc:interceptor>-->
<!--</mvc:interceptors>-->
</beans>
用不到的暫時註釋掉了,在這裏面配置好註解等還有handler攔截後返回的jsp文件路徑等。
然後事spring的配置:
<?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:aop="http://www.springframework.org/schema/aop"
xmlns:mvc="http://www.springframework.org/schema/mvc"
xmlns:tx="http://www.springframework.org/schema/tx"
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
http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop.xsd
http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc.xsd
http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx.xsd">
<bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
<!--注入數據源對象-->
<property name="dataSource" ref="dataSource"></property>
</bean>
<!--使用註解管理事務-->
<!--<tx:annotation-driven transaction-manager="transactionManager"></tx:annotation-driven>-->
<mvc:annotation-driven></mvc:annotation-driven>
<!--把對象加載到spring容器,加載註解的對象-->
<context:component-scan base-package="com.sdust.ssm"></context:component-scan>
</beans>
<?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:aop="http://www.springframework.org/schema/aop"
xmlns:mvc="http://www.springframework.org/schema/mvc"
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
http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop.xsd
http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc.xsd">
<context:property-placeholder location="classpath:config/db.properties"></context:property-placeholder>
<!--配置數據源dbcp-->
<bean id="dataSource" class="org.apache.commons.dbcp.BasicDataSource" destroy-method="close">
<property name="driverClassName" value="${jdbc.driver}"></property>
<property name="url" value="${jdbc.url}"></property>
<property name="username" value="${jdbc.username}"></property>
<property name="password" value="${jdbc.password}"></property>
<!--最大連接數-->
<property name="maxActive" value="30"></property>
<!--空閒最大連接數-->
<property name="maxIdle" value="5"></property>
</bean>
<bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
<!--注入數據源-->
<property name="dataSource" ref="dataSource"></property>
<!--加載mybatis核心配置文件-->
<property name="configLocation" value="classpath:mybatis/mybatis-config.xml"></property>
<!--加載mapper.xml文件-->
<property name="mapperLocations" value="classpath:mapper/*.xml"></property>
</bean>
<!--配置mapper掃描器-->
<bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
<!--注入sqlSessionFactory對象-->
<property name="sqlSessionFactoryBeanName" value="sqlSessionFactory"></property>
<!--配置掃描的包路徑-->
<property name="basePackage" value="com.sdust.ssm.mapper"></property>
</bean>
</beans>
將註解和mybatis的配置文件配入,配置好數據庫連接池信息,和簡單的jdbc+jsp工程不同,將配置信息都分離,達到最大程度的解耦合,使開發任務更加的清晰。
在配置mybatis的配置:
<?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>
<!--配置別名-->
<typeAliases>
<package name="com.sdust.ssm.po"></package>
</typeAliases>
<!--配置mapper文件-->
<!--<mappers>-->
<!--<package name="classpath:mappers/*.xml"></package>-->
<!--</mappers>-->
</configuration>
由於使用spring mybatis,mappers不在這裏配置,spring自動掃入,但是別名還是要設的。
開始java代碼的編寫,首先是handler的編寫:
/**
* Created by LiuYuanZhe on 17/12/17.
*/
@Controller
@RequestMapping(value = "/student")
public class StudentController {
@Autowired
StudentService studentService;
// 測試springmvc是否鏈接responsebody返回body部分可以直接用postman請求測試
@RequestMapping(value = "/testConnection",method = {RequestMethod.POST,RequestMethod.GET})
@ResponseBody
public String connection(){
System.out.println("連接成功");
return "testConnection";
}
/**
* 返回一個modelview來返回mybatis查取的信息
* @return
*/
@RequestMapping(value = "/getStudent",method = {RequestMethod.POST,RequestMethod.GET})
public ModelAndView getStudent(){
ModelAndView modelAndView = new ModelAndView();
try {
Student student = studentService.getStudentById();
modelAndView.addObject("student",student);
modelAndView.setViewName("student");
System.out.println(student.toString());
}catch (Exception e){
e.printStackTrace();
}
return modelAndView;
}
}
只是一個簡單的demo,所以就使用modelandview來做一個前後端的承載。
這裏是java的包結構,然後事mapper的編寫,demo都很簡單
<?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.sdust.ssm.mapper.StudentMapper">
<!--查詢商品列表-->
<select id="getStudentById" resultType="Student">
SELECT * FROM student WHERE id=1
</select>
<select id="getAllStudent" resultType="Student">
SELECT id,name,sex,age,memo,birthday FROM student
</select>
<insert id="addStudent" parameterType="Student">
INSERT INTO student (name,sex,age,memo,birthday) VALUES (#{name},#{sex},#{age},#{memo},#{birthday})
</insert>
<delete id="deleteStudent" parameterType="int">
DELETE FROM student WHERE id=#{id}
</delete>
<!--<update id="updateStudent" parameterType="Student">-->
<!--UPDATE -->
<!--</update>-->
</mapper>
package com.sdust.ssm.mapper;
import com.sdust.ssm.po.Student;
import java.util.List;
/**
* Created by LiuYuanZhe on 17/12/17.
*/
/*
因爲使用spring-mybatis所以mapper的xml配置文件和class類要放在同一個目錄下.
*/
public interface StudentMapper {
public Student getStudentById() throws Exception;
public List<Student> getAllStudent() throws Exception;
public void addStudent(Student student) throws Exception;
public void deleteStudent(int id) throws Exception;
}
配置文件和接口要同名,還有一個問題就是,因爲spring自動去掃描,所以mapper的類和配置文件要在同一個目錄下!!!一開始這裏卡了半天。。。
這就是簡單的maven管理的使用idea搭建的springmvc-mybatis的初學demo。
搭建好tomcat之後跑起來,使用postman調用接口,訪問成功。
調用接口查到了數據庫的數據,ohYeah!!!
還有一個地方,idea裏面tomcat配置的時候
要勾選這裏或者在depolyment
這裏配置一個別名,,,,
先到這裏吧,過一陣傳到github裏。。。。mac的截圖出來真大啊
截圖貌似都沒有傳上去