数据的获取与显示
（一）功能
1.对用户输入的数据进行获取
2.将获取的数据显示到页面
3.使用了SpringMVC技术的注解方式
4.使用了过滤器，处理中文乱码问题
5.在web.xml中设置了访问静态资源，保证页面样式的显现
（二）代码实现
1.pom.xml
<dependencies> <dependency> <groupId>junit</groupId> <artifactId>junit</artifactId> <version>4.11</version> </dependency> <!-- https://mvnrepository.com/artifact/org.springframework/spring-webmvc --> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-webmvc</artifactId> <version>5.1.3.RELEASE</version> </dependency> <dependency> <groupId>javax.servlet</groupId> <artifactId>javax.servlet-api</artifactId> <version>3.1.0</version> </dependency> </dependencies>
2.web.xml
<web-app> <display-name>Archetype Created Web Application</display-name> <!--过滤器,处理中文乱码--> <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> <!--设置访问静态资源--> <servlet-mapping> <servlet-name>default</servlet-name> <url-pattern>*.css</url-pattern> </servlet-mapping> <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:springmvc.xml</param-value> </init-param> </servlet> <servlet-mapping> <servlet-name>SpringMVC</servlet-name> <url-pattern>/</url-pattern> </servlet-mapping> </web-app>
3.springmvc.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" 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"> <!--将AnnotationHandler自动扫描到IOC容器中--> <context:component-scan base-package="handle"></context:component-scan> <!--配置视图解析器--><!--将逻辑视图解析成物理视图--> <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver"> <!--配置前缀--> <property name="prefix" value="/"></property> <!--配置后缀--> <property name="suffix" value=".jsp"></property> </bean> </beans>
4.User.java
package entity; public class User { private String name; private String password; public String getName() { return name; } public void setName(String name) { this.name = name; } public String getPassword() { return password; } public void setPassword(String password) { this.password = password; } }
5.UsreHandler.java
package handle; import entity.User; import org.springframework.stereotype.Controller; import org.springframework.ui.Model; import org.springframework.web.bind.annotation.RequestMapping; import org.springframework.web.servlet.ModelAndView; @Controller public class UserHandler { @RequestMapping("/add") public ModelAndView add(User user){ ModelAndView modelAndView=new ModelAndView(); modelAndView.addObject("user",user); modelAndView.setViewName("test"); return modelAndView; } }
6.index.jsp
<%@ page contentType="text/html;charset=UTF-8" language="java" %> <%@page isELIgnored="false" %> <html> <head> <title>Title</title> </head> <body> <form action="add" method="post"> 账户名：<input type="text" name="name"> 密码：<input type="text" name="password"> <input type="submit" value="登录"> </form> </body> </html>
7.test.jsp
<%@ page contentType="text/html;charset=UTF-8" language="java" %> <%@page isELIgnored="false" %> <html> <head> <title>Title</title> </head> <body> 用户名：${user.name} 密码：${user.password} </body> </html>