转载：SpringMVC:上传与下载

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转载：SpringMVC:上传与下载

2024-07-27 05:52:20 221人阅读

1 springmvc.xml必须配置:

Java代码

<bean id="multipartResolver"
class="org.springframework.web.multipart.commons.CommonsMultipartResolver" p:defaultEncoding="utf-8"/>

Java代码

<bean id="multipartResolver"
class="org.springframework.web.multipart.commons.CommonsMultipartResolver" p:defaultEncoding="utf-8"/>

2 WEB-INF/lib下必加入:commons-fileupload.jar与commons-io-1.4.jar二个文件
3 表单属性为: enctype="multipart/form-data"
工程项目图片如下:

具体代码如下:
FileUploadBean.java

Java代码

public class FileUploadBean {
private byte[] file;
public void setFile(byte[] file) {
this.file = file;
}
public byte[] getFile() {
return file;
}
}

Java代码

public class FileUploadBean {
private byte[] file;
public void setFile(byte[] file) {
this.file = file;
}
public byte[] getFile() {
return file;
}
}

Java代码

package net.liuzd.web;
import java.io.BufferedInputStream;
import java.io.BufferedOutputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.net.BindException;
import java.util.ArrayList;
import java.util.List;
import java.util.Map;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.springframework.stereotype.Controller;
import org.springframework.util.FileCopyUtils;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
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.servlet.ModelAndView;
/**
* Title: Description: Copyright: Copyright (c) 2011
* Company:http://liuzidong.iteye.com/ Makedate:2011-5-27 下午01:52:17
*
* @author liuzidong
* @version 1.0
* @since 1.0
*
*/
@Controller
public class FileUploadController {
@RequestMapping(value = "/upload", method = RequestMethod.POST)
public ModelAndView onSubmit(HttpServletRequest request,
HttpServletResponse response, BindException errors)
throws Exception {
MultipartHttpServletRequest multipartRequest = (MultipartHttpServletRequest) request;
CommonsMultipartFile file = (CommonsMultipartFile) multipartRequest
.getFile("file");
String name = multipartRequest.getParameter("name");
System.out.println("name: " + name);
// 获得文件名：
String realFileName = file.getOriginalFilename();
System.out.println("获得文件名：" + realFileName);
// 获取路径
String ctxPath = request.getSession().getServletContext().getRealPath(
"/")
+ "images/";
// 创建文件
File dirPath = new File(ctxPath);
if (!dirPath.exists()) {
dirPath.mkdir();
}
File uploadFile = new File(ctxPath + realFileName);
FileCopyUtils.copy(file.getBytes(), uploadFile);
request.setAttribute("files", loadFiles(request));
return new ModelAndView("success");
}
@RequestMapping(value = "/upload2", method = RequestMethod.POST)
public ModelAndView onSubmit2(HttpServletRequest request,
HttpServletResponse response, BindException errors)
throws Exception {
// 转型为MultipartHttpRequest
MultipartHttpServletRequest multipartRequest = (MultipartHttpServletRequest) request;
// 根据前台的name名称得到上传的文件
MultipartFile file = multipartRequest.getFile("file");
// 获得文件名：
String realFileName = file.getOriginalFilename();
// 获取路径
String ctxPath = request.getSession().getServletContext().getRealPath(
"/")
+ "\\" + "images\\";
// 创建文件
File dirPath = new File(ctxPath);
if (!dirPath.exists()) {
dirPath.mkdir();
}
File uploadFile = new File(ctxPath + realFileName);
FileCopyUtils.copy(file.getBytes(), uploadFile);
request.setAttribute("files", loadFiles(request));
return new ModelAndView("success");
}
@RequestMapping(value = "/upload3", method = RequestMethod.POST)
public String upload(@RequestParam("file")
MultipartFile image, HttpServletRequest request) throws IOException {
String ctxPath = request.getSession().getServletContext().getRealPath(
"/")
+ "\\" + "images\\";
System.out.println("路径：" + ctxPath);
File file = new File(ctxPath + "/" + image.getOriginalFilename());
// FileCopyUtils.copy(image.getBytes(),new
// File(ctxPath+"/"+image.getOriginalFilename()));
try {
image.transferTo(file); // 保存上传的文件
} catch (IllegalStateException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
request.setAttribute("files", loadFiles(request));
return "success";
}
// 多文件上传
@RequestMapping(value = "/upload4", method = RequestMethod.POST)
public ModelAndView fileUpload(HttpServletRequest request,
HttpServletResponse response, BindException errors)
throws Exception {
MultipartHttpServletRequest multipartRequest = (MultipartHttpServletRequest) request;
Map<String, MultipartFile> fileMap = multipartRequest.getFileMap();
String ctxPath = request.getSession().getServletContext().getRealPath(
"/")
+ "\\" + "images\\";
File file = new File(ctxPath);
if (!file.exists()) {
file.mkdir();
}
String fileName = null;
for (Map.Entry<String, MultipartFile> entity : fileMap.entrySet()) {
// 上传文件名
// System.out.println("key: " + entity.getKey());
MultipartFile mf = entity.getValue();
fileName = mf.getOriginalFilename();
File uploadFile = new File(ctxPath + fileName);
FileCopyUtils.copy(mf.getBytes(), uploadFile);
}
request.setAttribute("files", loadFiles(request));
return new ModelAndView("success");
}
// @ModelAttribute("files")//此属性用于初始类时调用,但上传文件后不能时时反应上传文件个数,不适合动态数据
public List<String> loadFiles(HttpServletRequest request) {
List<String> files = new ArrayList<String>();
String ctxPath = request.getSession().getServletContext().getRealPath(
"/")
+ "\\" + "images\\";
File file = new File(ctxPath);
if (file.exists()) {
File[] fs = file.listFiles();
String fname = null;
for (File f : fs) {
fname = f.getName();
if (f.isFile()) {
files.add(fname);
}
}
}
return files;
}
@RequestMapping("/download/{fileName}")
public ModelAndView download(@PathVariable("fileName")
String fileName, HttpServletRequest request, HttpServletResponse response)
throws Exception {
response.setContentType("text/html;charset=utf-8");
request.setCharacterEncoding("UTF-8");
java.io.BufferedInputStream bis = null;
java.io.BufferedOutputStream bos = null;
String ctxPath = request.getSession().getServletContext().getRealPath(
"/")
+ "\\" + "images\\";
String downLoadPath = ctxPath + fileName;
System.out.println(downLoadPath);
try {
long fileLength = new File(downLoadPath).length();
response.setContentType("application/x-msdownload;");
response.setHeader("Content-disposition", "attachment; filename="
+ new String(fileName.getBytes("utf-8"), "ISO8859-1"));
response.setHeader("Content-Length", String.valueOf(fileLength));
bis = new BufferedInputStream(new FileInputStream(downLoadPath));
bos = new BufferedOutputStream(response.getOutputStream());
byte[] buff = new byte[2048];
int bytesRead;
while (-1 != (bytesRead = bis.read(buff, 0, buff.length))) {
bos.write(buff, 0, bytesRead);
}
} catch (Exception e) {
e.printStackTrace();
} finally {
if (bis != null)
bis.close();
if (bos != null)
bos.close();
}
return null;
}
}

Java代码

package net.liuzd.web;
import java.io.BufferedInputStream;
import java.io.BufferedOutputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.net.BindException;
import java.util.ArrayList;
import java.util.List;
import java.util.Map;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.springframework.stereotype.Controller;
import org.springframework.util.FileCopyUtils;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
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.servlet.ModelAndView;
/**
* Title: Description: Copyright: Copyright (c) 2011
* Company:http://liuzidong.iteye.com/ Makedate:2011-5-27 下午01:52:17
*
* @author liuzidong
* @version 1.0
* @since 1.0
*
*/
@Controller
public class FileUploadController {
@RequestMapping(value = "/upload", method = RequestMethod.POST)
public ModelAndView onSubmit(HttpServletRequest request,
HttpServletResponse response, BindException errors)
throws Exception {
MultipartHttpServletRequest multipartRequest = (MultipartHttpServletRequest) request;
CommonsMultipartFile file = (CommonsMultipartFile) multipartRequest
.getFile("file");
String name = multipartRequest.getParameter("name");
System.out.println("name: " + name);
// 获得文件名：
String realFileName = file.getOriginalFilename();
System.out.println("获得文件名：" + realFileName);
// 获取路径
String ctxPath = request.getSession().getServletContext().getRealPath(
"/")
+ "images/";
// 创建文件
File dirPath = new File(ctxPath);
if (!dirPath.exists()) {
dirPath.mkdir();
}
File uploadFile = new File(ctxPath + realFileName);
FileCopyUtils.copy(file.getBytes(), uploadFile);
request.setAttribute("files", loadFiles(request));
return new ModelAndView("success");
}
@RequestMapping(value = "/upload2", method = RequestMethod.POST)
public ModelAndView onSubmit2(HttpServletRequest request,
HttpServletResponse response, BindException errors)
throws Exception {
// 转型为MultipartHttpRequest
MultipartHttpServletRequest multipartRequest = (MultipartHttpServletRequest) request;
// 根据前台的name名称得到上传的文件
MultipartFile file = multipartRequest.getFile("file");
// 获得文件名：
String realFileName = file.getOriginalFilename();
// 获取路径
String ctxPath = request.getSession().getServletContext().getRealPath(
"/")
+ "\\" + "images\\";
// 创建文件
File dirPath = new File(ctxPath);
if (!dirPath.exists()) {
dirPath.mkdir();
}
File uploadFile = new File(ctxPath + realFileName);
FileCopyUtils.copy(file.getBytes(), uploadFile);
request.setAttribute("files", loadFiles(request));
return new ModelAndView("success");
}
@RequestMapping(value = "/upload3", method = RequestMethod.POST)
public String upload(@RequestParam("file")
MultipartFile image, HttpServletRequest request) throws IOException {
String ctxPath = request.getSession().getServletContext().getRealPath(
"/")
+ "\\" + "images\\";
System.out.println("路径：" + ctxPath);
File file = new File(ctxPath + "/" + image.getOriginalFilename());
// FileCopyUtils.copy(image.getBytes(),new
// File(ctxPath+"/"+image.getOriginalFilename()));
try {
image.transferTo(file); // 保存上传的文件
} catch (IllegalStateException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
request.setAttribute("files", loadFiles(request));
return "success";
}
// 多文件上传
@RequestMapping(value = "/upload4", method = RequestMethod.POST)
public ModelAndView fileUpload(HttpServletRequest request,
HttpServletResponse response, BindException errors)
throws Exception {
MultipartHttpServletRequest multipartRequest = (MultipartHttpServletRequest) request;
Map<String, MultipartFile> fileMap = multipartRequest.getFileMap();
String ctxPath = request.getSession().getServletContext().getRealPath(
"/")
+ "\\" + "images\\";
File file = new File(ctxPath);
if (!file.exists()) {
file.mkdir();
}
String fileName = null;
for (Map.Entry<String, MultipartFile> entity : fileMap.entrySet()) {
// 上传文件名
// System.out.println("key: " + entity.getKey());
MultipartFile mf = entity.getValue();
fileName = mf.getOriginalFilename();
File uploadFile = new File(ctxPath + fileName);
FileCopyUtils.copy(mf.getBytes(), uploadFile);
}
request.setAttribute("files", loadFiles(request));
return new ModelAndView("success");
}
// @ModelAttribute("files")//此属性用于初始类时调用,但上传文件后不能时时反应上传文件个数,不适合动态数据
public List<String> loadFiles(HttpServletRequest request) {
List<String> files = new ArrayList<String>();
String ctxPath = request.getSession().getServletContext().getRealPath(
"/")
+ "\\" + "images\\";
File file = new File(ctxPath);
if (file.exists()) {
File[] fs = file.listFiles();
String fname = null;
for (File f : fs) {
fname = f.getName();
if (f.isFile()) {
files.add(fname);
}
}
}
return files;
}
@RequestMapping("/download/{fileName}")
public ModelAndView download(@PathVariable("fileName")
String fileName, HttpServletRequest request, HttpServletResponse response)
throws Exception {
response.setContentType("text/html;charset=utf-8");
request.setCharacterEncoding("UTF-8");
java.io.BufferedInputStream bis = null;
java.io.BufferedOutputStream bos = null;
String ctxPath = request.getSession().getServletContext().getRealPath(
"/")
+ "\\" + "images\\";
String downLoadPath = ctxPath + fileName;
System.out.println(downLoadPath);
try {
long fileLength = new File(downLoadPath).length();
response.setContentType("application/x-msdownload;");
response.setHeader("Content-disposition", "attachment; filename="
+ new String(fileName.getBytes("utf-8"), "ISO8859-1"));
response.setHeader("Content-Length", String.valueOf(fileLength));
bis = new BufferedInputStream(new FileInputStream(downLoadPath));
bos = new BufferedOutputStream(response.getOutputStream());
byte[] buff = new byte[2048];
int bytesRead;
while (-1 != (bytesRead = bis.read(buff, 0, buff.length))) {
bos.write(buff, 0, bytesRead);
}
} catch (Exception e) {
e.printStackTrace();
} finally {
if (bis != null)
bis.close();
if (bos != null)
bos.close();
}
return null;
}
}

spring.xml

Java代码

<?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">
<!--
自动搜索@Controller标注的类
用于指明系统从哪个路径下寻找controller，然后提前初始化这些对象。
-->
<context:component-scan base-package="net.liuzd.web" />
<bean
class="org.springframework.web.servlet.view.InternalResourceViewResolver"
p:prefix="/WEB-INF/jsp/" p:suffix=".jsp" />
<bean id="multipartResolver"
class="org.springframework.web.multipart.commons.CommonsMultipartResolver" p:defaultEncoding="utf-8">
<property name="maxUploadSize">
<value>104857600</value>
</property>
<property name="maxInMemorySize">
<value>4096</value>
</property>
</bean>
</beans>

Java代码

<?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">
<!--
自动搜索@Controller标注的类
用于指明系统从哪个路径下寻找controller，然后提前初始化这些对象。
-->
<context:component-scan base-package="net.liuzd.web" />
<bean
class="org.springframework.web.servlet.view.InternalResourceViewResolver"
p:prefix="/WEB-INF/jsp/" p:suffix=".jsp" />
<bean id="multipartResolver"
class="org.springframework.web.multipart.commons.CommonsMultipartResolver" p:defaultEncoding="utf-8">
<property name="maxUploadSize">
<value>104857600</value>
</property>
<property name="maxInMemorySize">
<value>4096</value>
</property>
</bean>
</beans>

success.jsp

Java代码

<%@ taglib prefix="c" uri="/WEB-INF/c.tld"%>
<h1>Upload Successful</h1>
<c:forEach var="month" items="${files}">
<li><a href=http://www.mamicode.com/"${pageContext.request.contextPath}/download/${month}.do">${month}</a></li>
</c:forEach>
<hr><br>
<a href=http://www.mamicode.com/"${pageContext.request.contextPath}/index.jsp">返回</a>

Java代码

<%@ taglib prefix="c" uri="/WEB-INF/c.tld"%>
<h1>Upload Successful</h1>
<c:forEach var="month" items="${files}">
<li><a href=http://www.mamicode.com/"${pageContext.request.contextPath}/download/${month}.do">${month}</a></li>
</c:forEach>
<hr><br>
<a href=http://www.mamicode.com/"${pageContext.request.contextPath}/index.jsp">返回</a>

web.xml

Java代码

<?xml version="1.0" encoding="UTF-8"?>
<web-app version="2.4" xmlns="http://java.sun.com/xml/ns/j2ee"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee
http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd">
<context-param>
<param-name>log4jConfigLocation</param-name>
<param-value>/WEB-INF/classes/log4j.properties</param-value>
</context-param>
<context-param>
<param-name>log4jRefreshInterval</param-name>
<param-value>60000</param-value>
</context-param>
<context-param>
<param-name>log4jExposeWebAppRoot</param-name>
<param-value>false</param-value>
</context-param>
<listener>
<listener-class>
org.springframework.web.util.Log4jConfigListener
</listener-class>
</listener>
<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>false</param-value>
</init-param>
</filter>
<filter-mapping>
<filter-name>encodingFilter</filter-name>
<url-pattern>*.do</url-pattern>
</filter-mapping>
<filter-mapping>
<filter-name>encodingFilter</filter-name>
<url-pattern>*.jsp</url-pattern>
</filter-mapping>
<servlet>
<servlet-name>springmvc</servlet-name>
<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>*.do</url-pattern>
</servlet-mapping>
<welcome-file-list>
<welcome-file>index.jsp</welcome-file>
</welcome-file-list>
</web-app>

参考:http://a52071453.iteye.com/blog/1559005

转载：SpringMVC:上传与下载

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转载：SpringMVC:上传与下载

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