SpringMVC基础-05-使用对象接受表单参数

 

pom.xml

<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.monkey1024</groupId>
  <artifactId>02mvc</artifactId>
  <version>0.0.1-SNAPSHOT</version>
  <packaging>war</packaging>
  <dependencies>
        <dependency>
            <groupId>junit</groupId>
            <artifactId>junit</artifactId>
            <version>3.8.1</version>
            <scope>test</scope>
        </dependency>
        <dependency>
            <groupId>javax.servlet</groupId>
            <artifactId>javax.servlet-api</artifactId>
            <version>3.1.0</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-webmvc</artifactId>
            <version>5.0.4.RELEASE</version>
        </dependency>

    </dependencies>
    <build>
    	<!-- 与工程名一致 -->
        <finalName>02mvc</finalName>
        <plugins>
            <!-- 编译插件，指定编译用的的jdk版本 -->
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-compiler-plugin</artifactId>
                <configuration>
                    <!-- jdk的版本号 -->
                    <source>1.8</source>
                    <target>1.8</target>
                    <encoding>UTF-8</encoding>
                </configuration>
            </plugin>
        </plugins>
    </build>
</project>

web.xml

<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
	xmlns="http://xmlns.jcp.org/xml/ns/javaee"
	xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_3_1.xsd"
	id="WebApp_ID" version="3.1">
	 <!--方式一：解决静态资源404的问题，将这些静态资源的请求交给DefaultServlet
	    <servlet-mapping>
	        <servlet-name>default</servlet-name>
	        <url-pattern>*.jpg</url-pattern>
	    </servlet-mapping>
	    <servlet-mapping>
	        <servlet-name>default</servlet-name>
	        <url-pattern>*.png</url-pattern>
	    </servlet-mapping>
	    <servlet-mapping>
	        <servlet-name>default</servlet-name>
	        <url-pattern>*.js</url-pattern>
	    </servlet-mapping>
	    <servlet-mapping>
	        <servlet-name>default</servlet-name>
	        <url-pattern>*.css</url-pattern>
	    </servlet-mapping>
	-->
	<!-- 字符编码过滤器 -->
	<!-- 最好配置在其他过滤器之前，因为过滤器的执行顺序是根据web.xml中的顺序一致 -->
	<filter>
		<filter-name>characterEncodingFilter</filter-name>
		<filter-class>org.springframework.web.filter.CharacterEncodingFilter</filter-class>
		<!-- 手动指定字符编码 -->
		<init-param>
			<!-- 因为当前filter中的成员变量叫做encoding，所以此处必须也写成encoding -->
			<param-name>encoding</param-name>
			<param-value>utf-8</param-value>
		</init-param>
		
		<!-- 强制指定字符编码，即使在request或者response中设置了字符编码，那么也会为其强制使用当前设置的字符编码 -->
		<init-param>
			<param-name>forceEncoding</param-name>
			<param-value>true</param-value>
		</init-param>
		
	</filter>
	<filter-mapping>
		<filter-name>characterEncodingFilter</filter-name>
		<url-pattern>/*</url-pattern>
	</filter-mapping>
	<!-- 注册spring MVC中央控制器 -->
	<servlet>
		<servlet-name>springMVC</servlet-name>
		<!-- spring MVC中的核心控制器 -->
		<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>
		<load-on-startup>1</load-on-startup>
	</servlet>
	<servlet-mapping>
		<servlet-name>springMVC</servlet-name>
		<url-pattern>/</url-pattern>
	</servlet-mapping>
</web-app>

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:p="http://www.springframework.org/schema/p"
       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">
        
	<!-- 如果配置了组件扫描器，并且有静态资源相关配置,需加这个并且，如果没有静态资源相关配置，可以不加 -->
	<!-- 注解驱动 -->
	<mvc:annotation-driven/>
	
	<!-- 注册组件扫描器 -->
	<context:component-scan base-package="com.monkey1024.*"/>
	
	<!-- 方式三：解决静态资源无法访问的问题，添加下面标签即可-->
    <!--
        mapping:表示对该资源的请求，注意后面是两个*
        location：静态资源所在的目录
    -->
	<mvc:resources mapping="/images/**" location="/images/"/>
	<mvc:resources mapping="/css/**" location="/css/"/>
	
	
	<!-- 视图解释类 需要放在controller上面-->
	<bean
		class="org.springframework.web.servlet.view.InternalResourceViewResolver">
		<property name="prefix" value="/jsp/" />
		<property name="suffix" value=".jsp" />
	</bean>
	
	<!-- 注册controller,
	<bean id="/hello.do" class="com.monkey1024.controller.HelloSpringMVC" />
	使用注解之后，就不用这个了 -->

</beans> 

Javabean School.java

package com.monkey1024.bean;

/*
 * 学校
 */
public class School {
	public String getSchoolName() {
		return schoolName;
	}
	public void setSchoolName(String schoolName) {
		this.schoolName = schoolName;
	}
	public String getAddress() {
		return address;
	}
	public void setAddress(String address) {
		this.address = address;
	}
	private String schoolName;
	private String address;
	
}

Javabean Student.java

package com.monkey1024.bean;

public class Student {
	private String name;
	private int age;
	//将school对象作为student中的一个属性，这是一个对象属性
	private School school;
	public School getSchool(){
		return school;
	}
	public void setSchool(School school){
		this.school = school;
	}
	
	
	public String getName(){
		return name;
	}
	public void setName(String name){
		this.name = name;
	}
	public int getAge(){
		return age;
	}
	public void setAge(int age){
		this.age = age;
	}
}

StudentController.java

package com.monkey1024.controller;

import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.servlet.ModelAndView;

import com.monkey1024.bean.Student;

/*
 * 学生Controller
 */
@Controller

@RequestMapping("/student")
public class StudentController {
	@RequestMapping("/add1")
	public ModelAndView add1(Student student) throws Exception {
		ModelAndView mv = new ModelAndView();
		mv.addObject("name", student.getName());
		mv.addObject("age", student.getAge());
		mv.setViewName("studentInfo");
		return mv;
	}
	@RequestMapping("/add2")
	public ModelAndView add2(Student student) throws Exception {
		ModelAndView mv = new ModelAndView();
		mv.addObject("name", student.getName());
		mv.addObject("age", student.getAge());
		mv.addObject("schoolName",student.getSchool().getSchoolName());
		mv.addObject("address",student.getSchool().getAddress());
		mv.setViewName("studentInfo");
		return mv;
	}
}

addStudent.jsp

<%@ page language="java" contentType="text/html; charset=utf-8"
    pageEncoding="utf-8"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<title>Insert title here</title>
</head>
<body>
	<form method="post" action="/student/add2.do">
		姓名:<input type="text" name="name">
		<br>
		年龄:<input type="text" name="age">
		<br>
		<!-- 要写成对象属性.属性的方式 -->
		学校名称:<input type="text" name="school.schoolName">
		<br>
		学校地址:<input type="text" name="school.address">
		<br>
		<input type="submit" value="提交">
	</form>
</body>
</html> 

studentinfo.jsp

<%@ page language="java" contentType="text/html; charset=utf-8"
    pageEncoding="utf-8"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<title>Insert title here</title>
</head>
<body>
姓名：${name }
<br>
年龄:${age }
<br>
学校名称:${schoolName }
<br>
学校地址:${address }
</body>
</html>