1 项目.xml配置文件
<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://java.sun.com/xml/ns/javaee" xmlns:web="http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd"
id="WebApp_ID" version="2.5">
<servlet>
<servlet-name>hello</servlet-name>
<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>//DispatcherServlet是SpringMvc的控制器。
<init-param>
<param-name>contextConfigLocation</param-name>
<param-value>classpath*:config/hello-servlet.xml</param-value>//去这个文件路径里去读取hello-servlet.xml配置文件的内容
</init-param>
<load-on-startup>1</load-on-startup>//表示容器在应用启动时就加载并初始化各个Servlet
</servlet>
<servlet-mapping>
<servlet-name>hello</servlet-name>
<url-pattern>/</url-pattern>//表示对每个服务器端的请求都会被拦截，但是一些静态文件没有在Controller的话则访问请求不了，需要配置
</servlet-mapping>
<!--SpringMvc提供的编码配置 -->
<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>
</web-app>
2. hello-servlet.xml
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:context="http://www.springframework.org/schema/context"
xmlns:p="http://www.springframework.org/schema/p"
xmlns:mvc="http://www.springframework.org/schema/mvc"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
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.xsd
http://www.springframework.org/schema/mvc
http://www.springframework.org/schema/mvc/spring-mvc-3.2.xsd">
<!-- 注解扫描包 -->
<context:component-scan base-package="com.gaorui.Controller.Annotation"/>
<!-- 开启注解 -->
<mvc:annotation-driven/>
<!-- 静态资源访问配置 -->
<mvc:resources location="/img/" mapping="/img/**"/>
<mvc:resources location="/js/" mapping="/js/**"/>
//SpringMVC视图解析器配置
<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>
<!-- SpringMvc 上传文件配置，暂时不写限制上传大小的参数 -->
<bean id="multipartResolver" class="org.springframework.web.multipart.commons.CommonsMultipartResolver">
<property name="defaultEncoding" value="UTF-8"/>
<!-- 指定所上传文件的总大小不能超过200KB。注意maxUploadSize属性的限制不是针对单个文件，而是所有文件的容量之和 -->
<!-- <property name="maxUploadSize" value="200000"/> -->
</bean>
</beans>
3 upload.jsp 前台的简单界面
<%@ 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>SpringMvc上传文件问候他大爷。</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>
<h>SpringMvc上传文件</h>
<form action="/SpringMvc6/upload/uploadfile2" method="post" enctype="multipart/form-data">//这里的enctype需要改为multipart/form-data，这是默认的上传下载文件默认的编码
<input type="file" name="file" >
<input type="submit" value="Submit">
</form>
</body>
</html>
4.UploadFile.java 后台的控制器为了方便直接进行了业务逻辑的处理，只有一个小例子就没有分层
package com.gaorui.Controller.Annotation;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.util.Iterator;
import javax.servlet.http.HttpServletRequest;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.multipart.MultipartFile;
import org.springframework.web.multipart.MultipartHttpServletRequest;
import org.springframework.web.multipart.commons.CommonsMultipartFile;
import org.springframework.web.multipart.commons.CommonsMultipartResolver;
@Controller
@RequestMapping("/upload")
public class UploadFile {
// 先访问该url 进入到 upload.jsp 页面
@RequestMapping("/toUpload")
public String toUpload(){
return "upload";
}
@RequestMapping("/uploadfile")
public String upload(@RequestParam(value="file") CommonsMultipartFile file){ //@RequestParam接受前台的数据，参数名为“file”
String filename1=file.getOriginalFilename(); //得到文件名
System.out.println(file.getOriginalFilename());
if(!filename1.isEmpty()){//作基本不为空的判断，保证代码的安全性
try {
// FileInputStream in = new FileInputStream("D:/"+new Date().getTime()+filename);
String filename2 = "D:/"+filename1;//设置文件保存路径
FileOutputStream os = new FileOutputStream(filename2); //设置文件输出流
InputStream in = file.getInputStream();//设置文件输入流in得到前台传递过来的流
//下面就是java最基本的数据写入文件了
int a =0;
byte[] b = new byte[1024];
while((a=in.read(b))!=-1){
os.write(b,0,a);
}
os.flush();
os.close();
in.close();
} catch (Exception e) {
e.printStackTrace();
}
}
return "uploadsuccess";
}
/*@RequestMapping("/uploadfile2")
public String uploadfile2(HttpServletRequest request){
CommonsMultipartResolver cmr =new CommonsMultipartResolver(request.getSession().getServletContext());
if(cmr.isMultipart(request)){
MultipartHttpServletRequest mhsr = (MultipartHttpServletRequest) request;
Iterator<String> iter = mhsr.getFileNames();
while(iter.hasNext()){
MultipartFile file = mhsr.getFile((String)iter.next());
String filename = file.getOriginalFilename();
String path ="E:/"+filename;
File file2 = new File(path);
try {
file.transferTo(file2);
} catch (IllegalStateException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
}
}
return "uploadsuccess";
}*/
}
项目路径，只需要看xml文件的位置和jsp文件的位置即可，其他包里的内容可以忽略
下一篇将是SpringMvc上传文件的优化。