标签:not 自动 comm 文件 obj bean 控制器 from tran
Srping Web Mvc和struts2都属于表现层框架,它是spring框架的一部分。
springmvc处理流程如下:
新建一个简单的springmvc程序-idea:https://www.cnblogs.com/wormday/p/8435617.html
1.src下新建文件夹com.david.controller
2.web.xml配置
<?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"> <!--前端控制器 --> <servlet> <servlet-name>dispatcher</servlet-name> <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class> <load-on-startup>1</load-on-startup> <!--如果不配置会默认去找 /WEB-INF/{servlet-name}-servlet.xml --> <init-param> <param-name>contextConfigLocation</param-name> <param-value>classpath:springmvc.xml</param-value> </init-param> </servlet> <servlet-mapping> <servlet-name>dispatcher</servlet-name> <!-- 1. /* 拦截所有 jsp js png css 2. *.action *.do 拦截以action do结尾的请求 3. / 拦截所有(不包含jsp) 包含js png css --> <url-pattern>/</url-pattern> </servlet-mapping> </web-app>
3.springmvc核心配置文件- dispatcher-servlet.xml (没有用init-param指定)
<?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"> <!--扫描controller --> <context:component-scan base-package="com.david.controller"></context:component-scan> </beans>
4.在controller目录下新增ProductController类 --这里注意不要印错ModelAndView 是servlet下的 自动引入会引入portlet下的导致无法访问
package com.david.controller; import org.springframework.stereotype.Controller; import org.springframework.web.bind.annotation.RequestMapping; import org.springframework.web.servlet.ModelAndView; @Controller @RequestMapping("/product") //一级路径 public class ProductController { @RequestMapping("/list") //二级路径 也可写成/product/list public ModelAndView list(){ ModelAndView mav = new ModelAndView(); mav.setViewName("/WEB-INF/views/list.jsp"); return mav; } }
5.去目录新建该文件 输入/product/list访问测试
springmvc架构
1.用户发送请求到前端控制器DispatcherServlet
2.DispatcherServlet收到请求调用HandlerMapping处理器映射器
3.处理器映射器根据请求url找到具体的处理器,生成处理器对象及处理器拦截器一并返回给DispatcherServlet
4.DispatcherServlet通过HandlerAdapter处理器适配器调用处理器
5.执行处理器Controller
6.Controller执行完成返回ModelAndView
7.HandlerAdapter将controller执行结果ModelAndView返回给DispatcherServlet
8.HandlerAdapter将controller执行结果ModelAndView返回给DispatcherServlet
9.DispatcherServlet将ModelAndView传给ViewReslover视图解析器
10.DispatcherServlet对view进行渲染试图
11.DispatcherServlet响应给用户
配置三大组件
配置处理器映射
spring3.1开始废除了DefaultAnnotationHandlerMapping的使用,默认还是这个,推荐使用RequestMappingHandlerMapping完成注解式处理器映射。
在Dispatcher-servlet.xml中配置如下
<!-- 配置处理器映射器 --> <bean class="org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerMapping" />
配置处理器适配器
从spring3.1版本开始,废除了AnnotationMethodHandlerAdapter的使用,推荐使用RequestMappingHandlerAdapter完成注解式处理器适配。
<bean class="org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter" />
注解驱动
直接配置以上两个比较麻烦,可以直接使用注解驱动来加载。
SpringMVC使用<mvc:annotation-driven>自动加载RequestMappingHandlerMapping和RequestMappingHandlerAdapter
<mvc:annotation-driven />
视图解析器
<!-- 配置视图解析器 --> <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver"> <!-- 配置逻辑视图的前缀 --> <property name="prefix" value="/WEB-INF/views/" /> <!-- 配置逻辑视图的后缀 --> <property name="suffix" value=".jsp" /> </bean>
在controller中就可以直接写文件名了
mav.setViewName("list");///WEB-INF/views/list.jsp
springmvc与mybatis整合
spring(包含springmvc)、mybatis、mybatis-spring整合包、数据库驱动、第三方连接池。
编辑db.properties
jdbc.driver=com.mysql.jdbc.Driver jdbc.url=jdbc:mysql://localhost:3306/david2018_db?characterEncoding=utf-8 jdbc.username=root jdbc.password=1234
编辑applicationContet.xml
<?xml version="1.0" encoding="UTF-8"?> <beans xmlns="http://www.springframework.org/schema/beans" xmlns:context="http://www.springframework.org/schema/context" 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:xsi="http://www.w3.org/2001/XMLSchema-instance" 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/aop http://www.springframework.org/schema/aop/spring-aop-4.0.xsd http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-4.0.xsd http://www.springframework.org/schema/util http://www.springframework.org/schema/util/spring-util-4.0.xsd"> <!-- 加载配置文件 --> <context:property-placeholder location="classpath:db.properties" /> <!-- 数据库连接池 --> <bean id="dataSource" class="org.apache.commons.dbcp.BasicDataSource" destroy-method="close"> <property name="driverClassName" value="${jdbc.driver}" /> <property name="url" value="${jdbc.url}" /> <property name="username" value="${jdbc.username}" /> <property name="password" value="${jdbc.password}" /> <property name="maxActive" value="10" /> <property name="maxIdle" value="5" /> </bean> <!-- 配置SqlSessionFactory --> <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean"> <!-- 配置mybatis核心配置文件 --> <property name="configLocation" value="classpath:SqlMapConfig.xml" /> <!-- 配置数据源 --> <property name="dataSource" ref="dataSource" /> </bean> <!-- Mapper代理的方式扫描包 --> <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer"> <!-- 配置Mapper接口 --> <property name="basePackage" value="com.david.mapper" /> </bean> <!--注解事务 --> <bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager"> <property name="dataSource" ref="dataSource"></property> </bean> <!--开启注解 --> <tx:annotation-driven transaction-manager="transactionManager"></tx:annotation-driven> </beans>
编辑SqlMapConfig.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> <!-- 设置别名 --> <typeAliases> <package name="com.david.pojo"/> </typeAliases> </configuration>
编辑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"> <!--spring监听器 --> <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> <!--springmvc前端控制器 --> <servlet> <servlet-name>dispatcher</servlet-name> <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class> <load-on-startup>1</load-on-startup> </servlet> <servlet-mapping> <servlet-name>dispatcher</servlet-name> <url-pattern>/</url-pattern> </servlet-mapping> </web-app>
编辑dispatcher-servlet.xml springmvc配置文件
<?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: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/mvc http://www.springframework.org/schema/mvc/spring-mvc.xsd"> <!--扫描controller --> <context:component-scan base-package="com.david.controller"></context:component-scan> <!--注解驱动 --> <mvc:annotation-driven /> <!-- 配置视图解析器 --> <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver"> <!-- 配置逻辑视图的前缀 --> <property name="prefix" value="/WEB-INF/views/" /> <!-- 配置逻辑视图的后缀 --> <property name="suffix" value=".jsp" /> </bean> </beans>
编写pojo类
package com.david.pojo;
public class Product {
private Integer id;
private String name;
private String price;
private Integer categoryId;
public Integer getId() {
return id;
}
public void setId(Integer id) {
this.id = id;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public String getPrice() {
return price;
}
public void setPrice(String price) {
this.price = price;
}
public Integer getCategoryId() {
return categoryId;
}
public void setCategoryId(Integer categoryId) {
this.categoryId = categoryId;
}
}
编写mapper接口和xml文件
package com.david.mapper; import com.david.pojo.Product; import com.sun.tools.javac.util.List; public interface ProductMapper { List<Product> GetProductList(); }
<?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.david.mapper.ProductMapper"> <select id="GetProductList" resultType="Product"> select * from Product </select> </mapper>
编辑ProductController
@Controller @RequestMapping("/product") public class ProductController { @RequestMapping("/list") public ModelAndView list(){ ModelAndView mav = new ModelAndView(); mav.setViewName("list"); ApplicationContext ac = new ClassPathXmlApplicationContext("applicationContext.xml"); ProductMapper mapper = ac.getBean(ProductMapper.class); List<Product> list = mapper.GetProductList(); mav.addObject("list",list); return mav; } }
list.jsp
<html> <head> <title>Title</title> </head> <body> ${list.size()} </body> </html>
标签:not 自动 comm 文件 obj bean 控制器 from tran
原文地址:https://www.cnblogs.com/baidawei/p/9095663.html