SpringMVC学习二

使用POJO作为参数

web.xml

<?xml version="1.0" encoding="UTF-8"?>
<web-app version="3.0" 
    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_3_0.xsd">
  <display-name></display-name>    
  
  
  <!-- 
          配置org.springframework.web.filer.HiddenHttpMethodFilter:可以把POST请求转为DELETE或POST请求
   -->
   <filter>
             <filter-name>HiddenHttpMethodFilter</filter-name>
               <filter-class>org.springframework.web.filter.HiddenHttpMethodFilter</filter-class>
   
   </filter>
   <filter-mapping>
               <filter-name>HiddenHttpMethodFilter</filter-name>
               <!-- 过滤所有请求 -->
               <url-pattern>/*</url-pattern>
   </filter-mapping>
   <!-- 配置DispatcherServlet -->
  
          <servlet>
              <servlet-name>springDispatcherServlet</servlet-name>
              <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
              <!-- 配置 DispatcherServlet的一个初始化参数:配置SpringMvc 配置文件的位置和名称-->
                   <init-param>
                      <param-name>contextConfigLocation</param-name>
                      <param-value>classpath:springmvc.xml</param-value>
              </init-param>
              <!-- 也可以不通过contextConfigLocation 来配置SpringMvc的配置文件，而使用默认的
                      默认的配置文件为：/WEB-INF/<servlet-name>-servlet.xml
                          /WEB-INF/springDispatcherServlet-servlet.xml
              -->
                  
          <!-- 设置启动 -->
          <load-on-startup>1</load-on-startup>
          </servlet>
          
          <servlet-mapping>
          <!-- 请求处理 -->
              <servlet-name>springDispatcherServlet</servlet-name>
              <!-- /:应答所有请求 -->
              <url-pattern>/</url-pattern>
          </servlet-mapping>
  <welcome-file-list>
    <welcome-file>index.jsp</welcome-file>
  </welcome-file-list>
</web-app>

springmvc.xml

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
 
         xmlns:aop="http://www.springframework.org/schema/aop"
 
       xmlns:mvc="http://www.springframework.org/schema/mvc"
 
       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
 
       xmlns:context="http://www.springframework.org/schema/context" 
 
       xmlns:p="http://www.springframework.org/schema/p"
 
  xsi:schemaLocation="
 
              http://www.springframework.org/schema/beans    
 
                 http://www.springframework.org/schema/beans/spring-beans-4.0.xsd
     
              http://www.springframework.org/schema/mvc      
 
              http://www.springframework.org/schema/tx/spring-mvc-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">
             
             <!-- 配置自定义扫描包 -->
             <context:component-scan base-package="como.springmvc.handlers"></context:component-scan>
           <!-- 配置视图解析器：如何把handler方法返回值解析为实际的物理视图 -->
           
           <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
                       <!-- 前缀 -->
                       <property name="prefix" value="/WEB-INF/views/"></property>
                       <!-- 后缀 -->
                       <property name="suffix" value=".jsp"></property>
           </bean>
           </beans>
 

实体类代码：

User.java

package com.springmvc.entity;

public class User {

    
                private String username;
                private String password;
                private String email;
                private int age;
                private Address address;
                
                public String getUsername() {
                    return username;
                }
                public void setUsername(String username) {
                    this.username = username;
                }
                public String getPassword() {
                    return password;
                }
                public void setPassword(String password) {
                    this.password = password;
                }
                public String getEmail() {
                    return email;
                }
                public void setEmail(String email) {
                    this.email = email;
                }
                public int getAge() {
                    return age;
                }
                public void setAge(int age) {
                    this.age = age;
                }
                public Address getAddress() {
                    return address;
                }
                public void setAddress(Address address) {
                    this.address = address;
                }
                @Override
                public String toString() {
                    return "User [username=" + username + ", password="
                            + password + ", email=" + email + ", age=" + age
                            + ", address=" + address + "]";
                }
                
                
                
                
}

Address.java

package com.springmvc.entity;

public class Address {
        
    private String province;
    private String city;
    public String getProvince() {
        return province;
    }
    public void setProvince(String province) {
        this.province = province;
    }
    public String getCity() {
        return city;
    }
    public void setCity(String city) {
        this.city = city;
    }
    @Override
    public String toString() {
        return "Address [province=" + province + ", city=" + city + "]";
    }
    
}

Pojo.java

package como.springmvc.handlers;

import java.io.IOException;
import java.io.Writer;

import javax.servlet.http.*;

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

import com.springmvc.entity.User;

@Controller
@RequestMapping("/Pojo")
public class Pojo {
    
    /*
     * SpringMVC会按请求参数名和POJO属性名进行自动匹配
     * 自动为该对象填充属性，支持级联属性
     * 如：dept.deptId、dept.address.tel
     
     * */
            
    @RequestMapping("/testPojo")
            public String testPojo(User user){
                    System.out.println("testPojo"+user);
                
                return "success";
                
            }
    
    /*
     * 可以使用Servlet原生的API作为目标方法的参数，具体支持一下类型
     * HttpServletRequest
     * HttpServletResponse
     * HttpSession
     * java.security.Principal
     * Locale InputStream
     * OutputStream
     * Reader
     * Writer
     
     * */
    
    @RequestMapping("/testServletAPI")
            public void testServletAPI(HttpServletRequest request,
                    HttpServletResponse response,Writer out) throws IOException{
                        System.out.println("testServletAPI,"+request+","+response);
                        out.write("hello");
                //return "success";
                
            }
}

pojo.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 'pojo.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">
    
  </head>
  
  <body>
  <form action="Pojo/testPojo"  method="post"><br>
          username:<input type="text"  name="username" /><br>
          password:<input type="password"  name="password" /><br>
          email:<input type="text"  name="email" /><br>
          age:<input type="text"  name="age" /><br>
          <!-- 级联属性 ：属性的属性 -->
          city:<input type="text"  name="address.city" /><br>
          province:<input type="text"  name="address.province" /><br>
          <input type="submit" value="Value" />
  
  </form>
    
    
    <a href="Pojo/testServletAPI">Test ServletAPI</a>
  </body>
</html>

success.jsp

<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"  isErrorPage="true"%>
<%
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 'success.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>
   success page. <br>
  </body>
</html>