本文介紹使用SSM框架開發web項目Demo.html
1、建立一個web-Poject項目前端
1.導入相關jar文件至lib下。「相關jar文件」 --提取密碼 oraw java
2.修改web.xml文件mysql
<?xml version="1.0" encoding="UTF-8"?> <web-app version="3.0" xmlns="http://java.sun.com/xml/ns/javaee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd"> <display-name></display-name> <welcome-file-list> <welcome-file>index.jsp</welcome-file> </welcome-file-list> <!-- 加載spring容器 --> <listener> <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class> </listener> <context-param> <param-name>contextConfigLocation</param-name> <param-value>classpath:app.xml</param-value> </context-param> <!-- 前端控制器 --> <servlet> <servlet-name>DispatcherServlet</servlet-name> <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class> <init-param> <param-name>contextConfigLocation</param-name> <param-value>classpath:springmvc-servlet.xml</param-value> </init-param> </servlet> <servlet-mapping> <servlet-name>DispatcherServlet</servlet-name> <url-pattern>/</url-pattern> </servlet-mapping> <!-- 解決post方式的亂碼的過濾器 --> <filter> <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> </web-app>
2、建立相關配置文件。web
1.mybatis核心配置文件---mybatis-config.xmlspring
<?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"> <!-- 配置懶加載 --> <configuration> <settings> <setting name="lazyLoadingEnabled" value="false" /> </settings>
<!-- 配置別名 --> <typeAliases> <package name="com.test.pojo"/> </typeAliases> </configuration>
2.建立jdbc.properties文件，用於鏈接數據庫相關配置(案例鏈接mysql數據庫)sql
1 driverClassName=com.mysql.jdbc.Driver 2 url=jdbc\:mysql\://localhost\:端口號/數據庫名?useUnicode\=true&characterEncoding\=UTF-8 3 password=ok 4 uname=root
注意:須要改寫上面文件中的端口號和數據庫名方可以使用，mysql默認端口爲3306；數據庫
3.建立spring核心配置文件，本文案例名稱爲app.xml，可根據本身喜愛起名(特殊字符除外)，可是要和web.xml映射的spring配置文件名一致。express
<?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:aop="http://www.springframework.org/schema/aop" xmlns:tx="http://www.springframework.org/schema/tx" xmlns:context="http://www.springframework.org/schema/context" xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.0.xsd http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx.xsd http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-3.0.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.0.xsd"> <!-- 掃包(service層) --> <context:component-scan base-package="com.test.service" /> <!-- 導入鏈接池配置文件 --> <context:property-placeholder location="classpath:jdbc.properties" /> <!-- 數據源 --> <bean id="dataSource" class="org.apache.commons.dbcp.BasicDataSource" destroy-method="close" scope="singleton"> <property name="driverClassName" value="${driverClassName}"></property> <property name="url" value="${url}"></property> <property name="username" value="${uname}"></property> <property name="password" value="${password}"></property> </bean> <!-- 配置mybatis SqlSessionFactoryBean --> <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean"> <property name="dataSource" ref="dataSource" /> <property name="configLocation" value="classpath:mybatis-config.xml" /> </bean> <!-- Mapper接口所在包名，Spring會自動查找其下的Mapper --> <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer"> <property name="basePackage" value="com.test.mapper" /> </bean> <!-- 事務管理器 --> <bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager"> <property name="dataSource" ref="dataSource"></property> </bean> <!-- 事務管理 --> <tx:advice id="transactionAdvice" transaction-manager="transactionManager"> <tx:attributes> <tx:method name="add*" propagation="REQUIRED" read-only="false" isolation="DEFAULT" /> <tx:method name="del*" propagation="REQUIRED" read-only="false" isolation="DEFAULT" /> <tx:method name="update*" propagation="REQUIRED" read-only="false" isolation="DEFAULT" /> <tx:method name="get*" propagation="NEVER" read-only="true" /> <tx:method name="query*" propagation="NEVER" read-only="true" /> </tx:attributes> </tx:advice> <aop:config> <!-- 定義切點 --> <aop:pointcut expression="execution(* com.test.service..*.*(..))" id="pointCut" /> <aop:advisor advice-ref="transactionAdvice" pointcut-ref="pointCut" /> </aop:config> </beans>
4.建立springmvc核心配置文件，本文案例名稱爲springmvc-servlet.xml，可根據本身喜愛起名(特殊字符除外)，可是要和web.xml中前端控制器映射的配置文件名一致。apache
<?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:tx="http://www.springframework.org/schema/tx" xmlns:mvc="http://www.springframework.org/schema/mvc" xmlns:p="http://www.springframework.org/schema/p" xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-2.5.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-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/mvc http://www.springframework.org/schema/mvc/spring-mvc.xsd"> <context:component-scan base-package="com.test.controller"></context:component-scan> <mvc:annotation-driven> <mvc:message-converters> <bean class="com.alibaba.fastjson.support.spring.FastJsonHttpMessageConverter"> <property name="supportedMediaTypes"> <list> <value>text/html;charset=UTF-8</value> <value>application/json</value> </list> </property> <property name="features"> <list> <value>WriteDateUseDateFormat</value> </list> </property> </bean> <bean class="org.springframework.http.converter.StringHttpMessageConverter"> <property name="supportedMediaTypes"> <list> <value>application/json;charset=UTF-8</value> </list> </property> </bean> </mvc:message-converters> </mvc:annotation-driven> <bean class="org.springframework.web.servlet.view.ContentNegotiatingViewResolver"> <property name="favorParameter" value="true"></property> <property name="mediaTypes"> <map> <entry key="json" value="application/json;charset=UTF-8"></entry> <entry key="html" value="text/html;charset=UTF-8"></entry> </map> </property> <property name="viewResolvers"> <list> <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver"> <property name="prefix" value="/WEB-INF/jsp/"></property> <property name="suffix" value=".jsp"></property> </bean> </list> </property> </bean> </beans>
3、建立須要的包。
先建立一個簡單的數據庫。別忘記修改jdbc.properties文件鏈接數據庫相關配置。
1.實體類、2.控制器 3.數據訪問層 4.業務邏輯層
1.建立實體類----屬性和數據庫字段名最好一致，方便映射。
1 package com.test.pojo; 2 3 public class Person { 4 private int id; 5 private String name; 6 public int getId() { 7 return id; 8 } 9 public void setId(int id) { 10 this.id = id; 11 } 12 public String getName() { 13 return name; 14 } 15 public void setName(String name) { 16 this.name = name; 17 } 18 }
2.建立mapper接口和mapper.xml，注意mapper接口和mapper.xml文件名一致，掃包spring容器管理機制.
（1）mapper接口。(查詢操做)
package com.test.mapper; import java.util.List; import com.test.pojo.Person; public interface PersonMapper { List<Person> getPerson();//查詢全部數據 }
（2）mapper.xml
1 <?xml version="1.0" encoding="UTF-8"?> 2 <!DOCTYPE mapper SYSTEM "http://mybatis.org/dtd/mybatis-3-mapper.dtd" > 3 <mapper namespace="com.test.mapper.PersonMapper"> 4 <select id="getPerson" resultType="Person"> 5 SELECT * FROM person 6 </select> 7 </mapper>
3.建立service層。
（1）service接口
1 package com.test.service; 2 3 import java.util.List; 4 5 import com.test.pojo.Person; 6 7 public interface PersonService { 8 List<Person> getPerson(); 9 }
（2）service實現類
1 package com.test.service; 2 3 import java.util.List; 4 5 import javax.annotation.Resource; 6 7 import org.springframework.beans.factory.annotation.Autowired; 8 import org.springframework.stereotype.Service; 9 10 import com.test.mapper.PersonMapper; 11 import com.test.pojo.Person; 12 13 @Service 14 public class PersonServiceImp implements PersonService { 15 16 //兩種注入方式 任選其一 17 18 // @Resource注入，按名稱注入 名稱爲mapper接口名首字母小寫 19 @Resource(name = "personMapper") 20 private PersonMapper personMapper; 21 22 /* @Autowired注入，按類型注入 23 @Autowired 24 private PersonMapper personMapper;*/ 25 26 27 @Override 28 public List<Person> getPerson() { 29 return personMapper.getPerson(); 30 } 31 32 }
4.建立控制器。
package com.test.controller; import java.util.List; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.stereotype.Controller; import org.springframework.web.bind.annotation.RequestMapping; import org.springframework.web.bind.annotation.ResponseBody; import com.test.pojo.Person; import com.test.service.PersonService; @Controller public class PersonController { @Autowired private PersonService personService;
//返回json格式數據 @RequestMapping("/index") @ResponseBody public Object show(){ List<Person> list = personService.getPerson(); return list; } }
5.部署項目運行。