• SpringMVC注解开发

    注解：

    注解就是类似于添加注释，但是又不跟注释完全一样，注解可以理解为将类或者方法与特定的信息进行关联。

    一.使用@Controller

    @Controller继承@Component注解方法，将其以单例形成放置spring容器中，然后spring会通过配置文件中的<context:component-scan>的配置，进行如下操作

    1.扫描class文件，并将包含@Component及元注解为@Component的注解@Controller、@Service、@Repository或者其他自定义的的bean注册到beanFactory中。

    2.然后spring在注册处理器

    3.实例化处理器，然后将其放到beanPostFactory中，然后我们就可以在类中进行使用了。

    4.创建bean时，会自动调用相应的处理器进行处理。

    举个具体使用@Controller的实例与@RequestMapping的例子，

    UseController.java

    package com.zk.Controller;

import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;

@Controller//<bean id="UserController" class="UserController路径">
public class UserController {
	//@RequestMapping("hello")
	//访问路径注意更改
	//请求映射value="/hello.do",
	//@RequestMapping("hello")
	//@RequestMapping("/hello.do")
	//@RequestMapping(value="/hello.do")
	@RequestMapping(value="/hello.do",method=RequestMethod.GET)
	//@RequestMapping(value="/hello.do",method={RequestMethod.GET,RequestMethod.POST})
	public String myHello(){
		return "hello";
	}
}

    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"
    xsi:schemaLocation="http://www.springframework.org/schema/beans
    http://www.springframework.org/schema/beans/spring-beans-3.0.xsd
    http://www.springframework.org/schema/context
    http://www.springframework.org/schema/context/spring-context-3.0.xsd
    http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-3.0.xsd
    http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-3.0.xsd">
        
         <context:component-scan base-package="com.zk.Controller"></context:component-scan>
		
		<!-- 配置注解处理器映射器 
			功能：寻找执行类Controller
		-->
		<bean class="org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerMapping"></bean>
		
		<!-- 配置注解处理器适配器 
			功能：调用controller方法，执行controller
		-->
		<bean class="org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter"></bean>
         <bean id="viewResolver" class="org.springframework.web.servlet.view.InternalResourceViewResolver">
         <property name="prefix" value="/WEB-INF/jsp/"></property>
         <property name="suffix" value=".jsp"></property>
         </bean>
         
</beans>

    hello.jsp

    <%@ page language="java" import="java.util.*" pageEncoding="ISO-8859-1"%>
<%
String path = request.getContextPath();
String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
%>

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
  <head>
    <base href="<%=basePath%>">
    
    <title>My JSP 'Hello.jsp' starting page</title>
    
	<meta http-equiv="pragma" content="no-cache">
	<meta http-equiv="cache-control" content="no-cache">
	<meta http-equiv="expires" content="0">    
	<meta http-equiv="keywords" content="keyword1,keyword2,keyword3">
	<meta http-equiv="description" content="This is my page">
	<!--
	<link rel="stylesheet" type="text/css" href="styles.css">
	-->

  </head>
  
  <body>
    Hello,UserController <br>
  </body>
</html>

    web.xml

    <?xml version="1.0" encoding="UTF-8"?>
<web-app version="2.5" 
	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_2_5.xsd">
  <display-name>Spring_005</display-name>
  <servlet>
  <servlet-name>springmvc</servlet-name>
  <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
  <!-- 
  Spring 默认加载SpringMVC的配置文件，这个需要满足一下规则：
  命名规则：Servlet-name-servlet.xml========>SpringMVC-servlet.xml
  路径规范SpringMVC-serlvet.xml必须放在WEB-INF下
   -->
   <init-param>
   <param-name>contextConfigLocation</param-name>
   <param-value>/WEB-INF/config/springmvc.xml</param-value>   
   </init-param>
  </servlet>	
  <servlet-mapping>
  <servlet-name>springmvc</servlet-name>
  <url-pattern>*.do</url-pattern>
  </servlet-mapping>
  <welcome-file-list>
    <welcome-file>index.jsp</welcome-file>
  </welcome-file-list>
</web-app>

    　　运行结果如下：

    二.向后台传递参数

    1.传递string类型参数

    可以使用@RequestMapping向后台传递参数

    UserController.java

    package com.zk.Controller;


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

import com.zk.data.User;
import com.zk.data.UserCustom;


@Controller//<bean id="UserController" class="UserController路径">
@RequestMapping("/user")
public class UserController {
	@RequestMapping(value="/hello.do",method={RequestMethod.GET,RequestMethod.POST})
	public String myHello(){
		return "hello";
	}
	@RequestMapping("/receiveInt")
	public String receiveInt(String id){
		try {
			System.out.println(id);
		} catch (Exception e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
		return "success";
	}
}

    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"
    xsi:schemaLocation="http://www.springframework.org/schema/beans
    http://www.springframework.org/schema/beans/spring-beans-3.0.xsd
    http://www.springframework.org/schema/context
    http://www.springframework.org/schema/context/spring-context-3.0.xsd
    http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-3.0.xsd
    http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-3.0.xsd">
        
         <context:component-scan base-package="com.zk.Controller"></context:component-scan>
		
		<!-- 配置注解处理器映射器 
			功能：寻找执行类Controller
		-->
		<bean class="org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerMapping"></bean>
		
		<!-- 配置注解处理器适配器 
			功能：调用controller方法，执行controller
		-->
		<bean class="org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter"></bean>
        
         <bean id="viewResolver" class="org.springframework.web.servlet.view.InternalResourceViewResolver">
         <property name="prefix" value="/WEB-INF/jsp/"></property>
         <property name="suffix" value=".jsp"></property>
         </bean>
         
</beans>

    　hello.jsp

    <%@ page language="java" import="java.util.*" pageEncoding="utf-8"%>
<%
String path = request.getContextPath();
String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
%>

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
  <head>
    <base href="<%=basePath%>">
    
    <title>My JSP 'Hello.jsp' starting page</title>
	<meta http-equiv="pragma" content="no-cache">
	<meta http-equiv="cache-control" content="no-cache">
	<meta http-equiv="expires" content="0">    
	<meta http-equiv="keywords" content="keyword1,keyword2,keyword3">
	<meta http-equiv="description" content="This is my page">
	<!--
	<link rel="stylesheet" type="text/css" href="styles.css">
	-->

  </head>
  
  <body>
    Hello,UserController <br>

    <form action="${pageContext.request.contextPath}/user/receiveInt.do" method="post">
    <input type="text" id="id" name="id" value="id"/>
    <input type="submit" value="提交"/>
  
    </form>
  </body>
</html>

      web.xml

    <?xml version="1.0" encoding="UTF-8"?>
<web-app version="2.5" 
	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_2_5.xsd">
  <display-name>Spring_007</display-name>
  <servlet>
  <servlet-name>springmvc</servlet-name>
  <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
  <!-- 
  Spring 默认加载SpringMVC的配置文件，这个需要满足一下规则：
  命名规则：Servlet-name-servlet.xml========>SpringMVC-servlet.xml
  路径规范SpringMVC-serlvet.xml必须放在WEB-INF下
   -->
   <init-param>
   <param-name>contextConfigLocation</param-name>
   <param-value>/WEB-INF/config/springmvc.xml</param-value>   
   </init-param>
  </servlet>	
  <servlet-mapping>
  <servlet-name>springmvc</servlet-name>
  <url-pattern>*.do</url-pattern>
  </servlet-mapping>
</web-app>

    　　运行结果：

     

     2.传递对象类型参数

    UserController.java

    package com.zk.Controller;


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

import com.zk.data.User;
import com.zk.data.UserCustom;


@Controller//<bean id="UserController" class="UserController路径">
public class UserController {
	//访问路径注意更改
	//请求映射value="/hello.do",
	//@RequestMapping("hello")
	//@RequestMapping("/hello.do")
	//@RequestMapping(value="/hello.do")
	//@RequestMapping(value="/hello.do",method=RequestMethod.GET)
	
	@RequestMapping(value="/hello.do",method={RequestMethod.GET,RequestMethod.POST})
	public String myHello(){
		return "hello";
	}
	@RequestMapping("receive")
	public String receiveUser(UserCustom user){
		System.out.println(user);
		//model.addAttribute("user", user);
		return "success";
	}
}

    　User.java

    package com.zk.data;

public class User {
	public String Sname;
	public String Sno;
	public String Sid;
	public String getSname() {
		return Sname;
	}
	public void setSname(String sname) {
		Sname = sname;
	}
	public String getSno() {
		return Sno;
	}
	public void setSno(String sno) {
		Sno = sno;
	}
	public String getSid() {
		return Sid;
	}
	public void setSid(String sid) {
		Sid = sid;
	}
	@Override
	public String toString() {
		return "User [Sname=" + Sname + ", Sno=" + Sno + ", Sid=" + Sid + "]";
	}

}

    UserCustom.java

    package com.zk.data;

public class UserCustom {
	private User user;

	public User getUser() {
		return user;
	}

	public void setUser(User user) {
		this.user = user;
	}

	@Override
	public String toString() {
		return "UserCustom [user=" + user + "]";
	}
	
}

    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"
    xsi:schemaLocation="http://www.springframework.org/schema/beans
    http://www.springframework.org/schema/beans/spring-beans-3.0.xsd
    http://www.springframework.org/schema/context
    http://www.springframework.org/schema/context/spring-context-3.0.xsd
    http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-3.0.xsd
    http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-3.0.xsd">
        
         <context:component-scan base-package="com.zk.Controller"></context:component-scan>
		
		<!-- 配置注解处理器映射器 
			功能：寻找执行类Controller
		-->
		<bean class="org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerMapping"></bean>
		
		<!-- 配置注解处理器适配器 
			功能：调用controller方法，执行controller
		-->
		<bean class="org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter"></bean>
        
         <bean id="viewResolver" class="org.springframework.web.servlet.view.InternalResourceViewResolver">
         <property name="prefix" value="/WEB-INF/jsp/"></property>
         <property name="suffix" value=".jsp"></property>
         </bean>
         
</beans>

    　　hello.jsp

    <%@ page language="java" import="java.util.*" pageEncoding="utf-8"%>
<%
String path = request.getContextPath();
String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
%>

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
  <head>
    <base href="<%=basePath%>">
    
    <title>My JSP 'Hello.jsp' starting page</title>
	<meta http-equiv="pragma" content="no-cache">
	<meta http-equiv="cache-control" content="no-cache">
	<meta http-equiv="expires" content="0">    
	<meta http-equiv="keywords" content="keyword1,keyword2,keyword3">
	<meta http-equiv="description" content="This is my page">
	<!--
	<link rel="stylesheet" type="text/css" href="styles.css">
	-->

  </head>
  
  <body>
 <!--  ID:<input type="text" name="id" id="id" />-->
    Hello,UserController <br>
     
    <form action="${pageContext.request.contextPath}/receive.do" method="post">
    Sname:<input type="text" name="user.Sname" id="Sname"/>
    Sid:<input type="text" name="user.Sid" id="Sid"/>
    Sage:<input type="text" name="user.Sno" id="Sno"/>
    <input type="submit" value="提交"/>
    </form>
  </body>
</html>

    运行结果如下：

     3.传递数组类型参数

    hello2.jsp

    <%@ page language="java" import="java.util.*" pageEncoding="utf-8"%>
<%
String path = request.getContextPath();
String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
%>

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
  <head>
    <base href="<%=basePath%>">
    
    <title>My JSP 'Hello.jsp' starting page</title>
	<meta http-equiv="pragma" content="no-cache">
	<meta http-equiv="cache-control" content="no-cache">
	<meta http-equiv="expires" content="0">    
	<meta http-equiv="keywords" content="keyword1,keyword2,keyword3">
	<meta http-equiv="description" content="This is my page">
	<!--
	<link rel="stylesheet" type="text/css" href="styles.css">
	-->

  </head>
  
  <body>
  
    <form action="${pageContext.request.contextPath}/receiveIds.do" method="post">
    <!--  ID:<input type="text" name="id" id="id" />-->
    <input type="submit" value="提交"/>
    Id1:<input type="text" name="ids" id="ids" value="1"/>
    Id1:<input type="text" name="ids" id="ids" value="2"/>    
    Id1:<input type="text" name="ids" id="ids" value="3"/>    
    </form>
  </body>
</html>

    UserController.java

    package com.zk.Controller;

import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.servlet.ModelAndView;
import com.zk.data.User;
import com.zk.data.UserCustom;

@Controller//<bean id="UserController" class="UserController路径">
public class UserController {
	@RequestMapping(value="/hello2.do",method={RequestMethod.GET,RequestMethod.POST})
	public String myHello2(){
		return "hello2";
	}
	//接受数组类型参数
	@RequestMapping("receiveIds")
	public String receiveIds(Integer[] ids){
		for(int id:ids){
		System.out.println(id);
		}
		return "success";
	}
}

    　运行结果如下：

     4.传递List类型参数

    UserController.java

    package com.zk.Controller;


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

import com.zk.data.User;
import com.zk.data.UserCustom;

@Controller//<bean id="UserController" class="UserController路径">
public class UserController {
	//访问路径注意更改
	//请求映射value="/hello.do",
	//@RequestMapping("hello")
	//@RequestMapping("/hello.do")
	//@RequestMapping(value="/hello.do")
	//@RequestMapping(value="/hello.do",method=RequestMethod.GET)
	@RequestMapping(value="/hello.do",method={RequestMethod.GET,RequestMethod.POST})
	public String myHello(){
		return "hello";
	}
	
	@RequestMapping(value="/hello2.do",method={RequestMethod.GET,RequestMethod.POST})
	public String myHello2(){
		return "hello2";
	}
	
	@RequestMapping("receiveList")
	public String receiveUserList(UserCustom user){
		for(int count=0;count<user.getUserList().size();count++){
		System.out.println(user.getUserList().get(count));
		}
		//model.addAttribute("user", user);
		return "success";
	}	
}

    User.java

    package com.zk.data;

public class User {
	public String Sname;
	public String Sno;
	public String Sid;
	public String getSname() {
		return Sname;
	}
	public void setSname(String sname) {
		Sname = sname;
	}
	public String getSno() {
		return Sno;
	}
	public void setSno(String sno) {
		Sno = sno;
	}
	public String getSid() {
		return Sid;
	}
	public void setSid(String sid) {
		Sid = sid;
	}
	@Override
	public String toString() {
		return "User [Sname=" + Sname + ", Sno=" + Sno + ", Sid=" + Sid + "]";
	}

}

    　UserCustom.java

    package com.zk.data;

import java.util.List;

public class UserCustom {
	private User user;

	private List<User> userList;
	public User getUser() {
		return user;
	}

	public void setUser(User user) {
		this.user = user;
	}

	public List<User> getUserList() {
		return userList;
	}

	public void setUserList(List<User> userList) {
		this.userList = userList;
	}

	@Override
	public String toString() {
		return "UserCustom [user=" + user + "]";
	}
	
}

    　success.jsp

    <%@ page language="java" import="java.util.*" pageEncoding="utf-8"%>
<%
String path = request.getContextPath();
String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
%>

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
  <head>
    <base href="<%=basePath%>">
    
    <title>My JSP 'index.jsp' starting page</title>
	<meta http-equiv="pragma" content="no-cache">
	<meta http-equiv="cache-control" content="no-cache">
	<meta http-equiv="expires" content="0">    
	<meta http-equiv="keywords" content="keyword1,keyword2,keyword3">
	<meta http-equiv="description" content="This is my page">
	<!--
	<link rel="stylesheet" type="text/css" href="styles.css">
	-->
  </head>
  
  <body>
    <form>
    <!--  ID:<input type="text" name="id" id="id" />-->
    
  success
    </form>
  </body>
</html>

    　hello.jsp

    <%@ page language="java" import="java.util.*" pageEncoding="utf-8"%>
<%
String path = request.getContextPath();
String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
%>

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
  <head>
    <base href="<%=basePath%>">
    
    <title>My JSP 'Hello.jsp' starting page</title>
	<meta http-equiv="pragma" content="no-cache">
	<meta http-equiv="cache-control" content="no-cache">
	<meta http-equiv="expires" content="0">    
	<meta http-equiv="keywords" content="keyword1,keyword2,keyword3">
	<meta http-equiv="description" content="This is my page">
	<!--
	<link rel="stylesheet" type="text/css" href="styles.css">
	-->

  </head>
  
  <body>
 <!--  ID:<input type="text" name="id" id="id" />-->
    Hello,UserController <br>
    
    <form action="${pageContext.request.contextPath}/receiveList.do" method="post">
    Sname:<input type="text" name="userList[0].Sname" id="Sname" value='Sname0'/>
    Sid:<input type="text" name="userList[0].Sid" id="Sid" value='Sid0'/>
    Sage:<input type="text" name="userList[0].Sno" id="Sno" value='Sno0'/><br>
    Sname:<input type="text" name="userList[1].Sname" id="Sname" value='Sname1'/>
    Sid:<input type="text" name="userList[1].Sid" id="Sid" value='Sid1'/>
    Sage:<input type="text" name="userList[1].Sno" id="Sno" value='Sno1'/>
    <input type="submit" value="提交"/>

    </form>
  </body>
</html>

    　运行截图：

      5.传递Map类型参数

    UserController.java

    package com.zk.Controller;


import java.util.HashMap;
import java.util.Map;
import java.util.Map.Entry;

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

import com.zk.data.User;
import com.zk.data.UserCustom;


@Controller//<bean id="UserController" class="UserController路径">
public class UserController {
	//访问路径注意更改
	//请求映射value="/hello.do",
	//@RequestMapping("hello")
	//@RequestMapping("/hello.do")
	//@RequestMapping(value="/hello.do")
	//@RequestMapping(value="/hello.do",method=RequestMethod.GET)
	
	@RequestMapping(value="/hello.do",method={RequestMethod.GET,RequestMethod.POST})
	public String myHello(){
		return "hello";
	}
	
	@RequestMapping(value="/hello2.do",method={RequestMethod.GET,RequestMethod.POST})
	public String myHello2(){
		return "hello2";
	}
	
	@RequestMapping("receiveMap")
	public String receiveUserMap(UserCustom user){
		System.out.println(user.getUsermap().size());
		Map<String,Object> usermap=user.getUsermap();
		for(Entry<String, Object> MapObject : usermap.entrySet()){
			System.out.println(MapObject.getKey()+":"+MapObject.getValue());
		}
		//model.addAttribute("user", user);
		return "success";
	}
}

    　hello.jsp

    <%@ page language="java" import="java.util.*" pageEncoding="utf-8"%>
<%
String path = request.getContextPath();
String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
%>

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
  <head>
    <base href="<%=basePath%>">
    
    <title>My JSP 'Hello.jsp' starting page</title>
	<meta http-equiv="pragma" content="no-cache">
	<meta http-equiv="cache-control" content="no-cache">
	<meta http-equiv="expires" content="0">    
	<meta http-equiv="keywords" content="keyword1,keyword2,keyword3">
	<meta http-equiv="description" content="This is my page">
	<!--
	<link rel="stylesheet" type="text/css" href="styles.css">
	-->

  </head>
  
  <body>
    Hello,UserController <br>
     
    <form action="${pageContext.request.contextPath}/receiveMap.do" method="post">
    Sname:<input type="text" name="usermap['Sname']" id="Sname" value='Sname0'/>
    Sid:<input type="text" name="usermap['Sid']" id="Sid" value='Sid0'/>
    Sage:<input type="text" name="usermap['Sno']" id="Sno" value='Sno0'/><br>
    <input type="submit" value="提交"/>
    </form>
  </body>
</html>

    　　运行后结果为：
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  • 原文地址：https://www.cnblogs.com/longlyseul/p/12284337.html
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