Spring MVC接收前台信息,并在页面返回
目录
题目:
1、pom.xml中配置依赖:
2、在resources根目录下创建springmvc-config.xml核心配置文件
3、设置webapp目录结构:
4、在web.xml中配置:
5、创建login.jsp页面,要在webapp下才可以直接访问
6、创建Signon实体
7、编写控制层SignonController.java
8、编写自定义类型转换器:
9、在springmvc-config.xml中配置自定义类型转换器:
10、在指定路径下创建welcome.jsp:
11、配置Tomcat,运行项目:
12、提交后,会跳转到welcome.jsp页面,此时中文字符出现乱码问题
13、为解决乱码问题,在web.xml中配置字符过滤器:
14、此时再次运行项目:能够正常显示中文字符
题目:
已知前台界面和程序如下:
<form action="login6" method="post">
用户信息(用户信息包括用户名和密码):<br/>
录入时用户名和密码之间以英文逗号隔开<br/><input type="text" name="signon" size="30"/><br/>
<br/>
<input type="submit" value="提交"/><input type="reset" value="重置"/>
</form>
另外已知用户信息类Signon的代码如下:
public class Signon {
String uname;
String pwd;
//缺省set/get方法
}
请利用Spring MVC框架完成如下操作:
1) 编写Controller,接收前台发送的用户信息,要求处理函数的参数类型为Signon类,并将接收到的用户信息在欢迎界面welcome.jsp中进行显示(5分)。
2)编写自定义类型转换器,实现前台用户信息和后台处理函数参数之间的数据绑定(7分)。
3) 配置Spring MVC的核心配置文件springmvc-config.xml,重点配置注解扫描包和视图解析器(5分)。
4)编写welcome.jsp页面,实现用户信息的显示(3分)。
1、pom.xml中配置依赖:
<?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.haust</groupId>
<artifactId>test34_1</artifactId>
<version>1.0-SNAPSHOT</version>
<packaging>war</packaging>
<dependencies>
<!-- mybatis-->
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<version>8.0.28</version>
</dependency>
<dependency>
<groupId>org.mybatis</groupId>
<artifactId>mybatis</artifactId>
<version>3.5.11</version>
</dependency>
<!-- 数据源-->
<dependency>
<groupId>com.alibaba</groupId>
<artifactId>druid</artifactId>
<version>1.1.20</version>
</dependency>
<!-- spring-->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-context</artifactId>
<version>5.2.8.RELEASE</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-aspects</artifactId>
<version>5.2.8.RELEASE</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-jdbc</artifactId>
<version>5.2.8.RELEASE</version>
</dependency>
<!-- springmvc-->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-webmvc</artifactId>
<version>5.2.8.RELEASE</version>
</dependency>
<dependency>
<groupId>javax.servlet</groupId>
<artifactId>javax.servlet-api</artifactId>
<version>4.0.1</version>
<scope>provided</scope>
</dependency>
<dependency>
<groupId>javax.servlet.jsp</groupId>
<artifactId>jsp-api</artifactId>
<version>2.2</version>
<scope>provided</scope>
</dependency>
<dependency>
<groupId>com.fasterxml.jackson.core</groupId>
<artifactId>jackson-databind</artifactId>
<version>2.9.2</version>
</dependency>
<!-- spring和mybatis整合-->
<dependency>
<groupId>org.mybatis</groupId>
<artifactId>mybatis-spring</artifactId>
<version>2.0.7</version>
</dependency>
<!-- 单元测试-->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-test</artifactId>
<version>5.2.8.RELEASE</version>
</dependency>
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>4.12</version>
<scope>test</scope>
</dependency>
<!-- jstl-->
<dependency>
<groupId>jstl</groupId>
<artifactId>jstl</artifactId>
<version>1.2</version>
</dependency>
<dependency>
<groupId>taglibs</groupId>
<artifactId>standard</artifactId>
<version>1.1.2</version>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.apache.tomcat.maven</groupId>
<artifactId>tomcat7-maven-plugin</artifactId>
<version>2.2</version>
<configuration>
<port>8080</port>
<path>/chapter34_1</path>
<uriEncoding>utf-8</uriEncoding>
</configuration>
</plugin>
</plugins>
</build>
</project>
2、在resources根目录下创建springmvc-config.xml核心配置文件
<?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:tx="http://www.springframework.org/schema/tx"
xmlns:aop="http://www.springframework.org/schema/aop"
xmlns:mvc="http://www.springframework.org/schema/mvc"
xsi:schemaLocation="http://www.springframework.org/schema/beans
https://www.springframework.org/schema/beans/spring-beans.xsd
http://www.springframework.org/schema/context https://www.springframework.org/schema/context/spring-context.xsd
http://www.springframework.org/schema/tx https://www.springframework.org/schema/tx/spring-tx.xsd http://www.springframework.org/schema/aop https://www.springframework.org/schema/aop/spring-aop.xsd
http://www.springframework.org/schema/mvc https://www.springframework.org/schema/mvc/spring-mvc.xsd">
<context:component-scan base-package="com.haust.controller"/>
<bean id="InternalResourceViewResolver"
class="org.springframework.web.servlet.view.InternalResourceViewResolver">
<property name="prefix" value="/WEB-INF/pages/"/>
<property name="suffix" value=".jsp"/>
</bean>
</beans>
3、设置webapp目录结构:
4、在web.xml中配置:
<?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_4_0.xsd"
version="4.0">
<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-config.xml</param-value>
</init-param>
<load-on-startup>1</load-on-startup>
</servlet>
<servlet-mapping>
<servlet-name>DispatcherServlet</servlet-name>
<url-pattern>/</url-pattern>
</servlet-mapping>
</web-app>
5、创建login.jsp页面,要在webapp下才可以直接访问
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
<title>Title</title>
</head>
<body>
<form action="login6" method="post">
用户信息(用户信息包括用户名和密码):<br/>
录入时用户名和密码之间以英文逗号隔开<br/>
<input type="text" name="signon" size="30"/><br/>
<br/>
<input type="submit" value="提交"/>
<input type="reset" value="重置"/>
</form>
</body>
</html>
6、创建Signon实体
package com.haust.pojo;
public class Signon {
private String uname;
private String pwd;
public String getUname() {
return uname;
}
public void setUname(String uname) {
this.uname = uname;
}
public String getPwd() {
return pwd;
}
public void setPwd(String pwd) {
this.pwd = pwd;
}
}
7、编写控制层SignonController.java
package com.haust.controller;
import com.haust.pojo.Signon;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.ModelAttribute;
import org.springframework.web.bind.annotation.PostMapping;
@Controller
public class SignonController {
@PostMapping("/login6")
public String sendRequest(@ModelAttribute("signon") Signon signon, Model model){
model.addAttribute("username",signon.getUname());
model.addAttribute("password",signon.getPwd());
return "welcome";
}
}
8、编写自定义类型转换器:
package com.haust.converter;
import com.haust.pojo.Signon;
import org.springframework.core.convert.converter.Converter;
import org.springframework.stereotype.Component;
@Component
public class SignonConverter implements Converter<String, Signon> {
public Signon convert(String s) {
String[] split = s.split(",");
Signon signon = new Signon();
signon.setUname(split[0]);
signon.setPwd(split[1]);
return signon;
}
}
9、在springmvc-config.xml中配置自定义类型转换器:
<?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"
xmlns:aop="http://www.springframework.org/schema/aop"
xmlns:mvc="http://www.springframework.org/schema/mvc"
xsi:schemaLocation="http://www.springframework.org/schema/beans
https://www.springframework.org/schema/beans/spring-beans.xsd
http://www.springframework.org/schema/context https://www.springframework.org/schema/context/spring-context.xsd
http://www.springframework.org/schema/tx https://www.springframework.org/schema/tx/spring-tx.xsd http://www.springframework.org/schema/aop https://www.springframework.org/schema/aop/spring-aop.xsd
http://www.springframework.org/schema/mvc https://www.springframework.org/schema/mvc/spring-mvc.xsd">
<context:component-scan base-package="com.haust.controller"/>
<bean id="InternalResourceViewResolver"
class="org.springframework.web.servlet.view.InternalResourceViewResolver">
<property name="prefix" value="/WEB-INF/pages/"/>
<property name="suffix" value=".jsp"/>
</bean>
<bean id="conversionService2" class="org.springframework.context.support.ConversionServiceFactoryBean">
<property name="converters">
<bean class="com.haust.converter.SignonConverter"/>
</property>
</bean>
<mvc:annotation-driven conversion-service="conversionService2"/>
</beans>
10、在指定路径下创建welcome.jsp:
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
<title>Title</title>
</head>
<body>
<h1>welcome.jsp页面</h1>
<h1>用户名:${username}</h1>
<h1>密码:${password}</h1>
</body>
</html>
11、配置Tomcat,运行项目:
12、提交后,会跳转到welcome.jsp页面,此时中文字符出现乱码问题
13、为解决乱码问题,在web.xml中配置字符过滤器:
<?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_4_0.xsd"
version="4.0">
<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-config.xml</param-value>
</init-param>
<load-on-startup>1</load-on-startup>
</servlet>
<servlet-mapping>
<servlet-name>DispatcherServlet</servlet-name>
<url-pattern>/</url-pattern>
</servlet-mapping>
<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>