apache commons fileupload 组件上传文件
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2022-04-20 21:04:51
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package com.sf.novatar.plf.controller;
import java.io.File;
import java.io.IOException;
import java.io.PrintWriter;
import java.util.Iterator;
import java.util.List;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;
import org.apache.commons.fileupload.FileItem;
import org.apache.commons.fileupload.FileUploadException;
import org.apache.commons.fileupload.FileUploadBase.SizeLimitExceededException;
import org.apache.commons.fileupload.disk.DiskFileItemFactory;
import org.apache.commons.fileupload.servlet.ServletFileUpload;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
/**
* 上传
* @author sfit1512
*
*/
@Controller
@RequestMapping("/upload")
public class UploadController {
@RequestMapping(value = "/upload", method = RequestMethod.POST)
public void upload(HttpServletRequest request,HttpServletResponse response,HttpSession session){
//String transactionImportTemp = (String) request.getSession().getServletContext().getAttribute(Constants.TRANSACTION_IMPORT_TEMP);
//String transactionImportTemp =request.getServletContext().getContextPath();
String transactionImportTemp = request.getSession().getServletContext().getRealPath("/pc-rs/novatar.frameimpl/scripts/static/upload");
//String transactionImportTemp ="E:\\upload";
// 设置上传文件最大为 3M
final long MAX_SIZE = 5 * 1024 * 1024;
// 允许上传的文件格式的列表 final
String[] allowedExt = new String[] { "xlsx" };
response.setContentType("text/html"); // 设置字符编码为UTF-8, 这样支持汉字显示
response.setCharacterEncoding("UTF-8");
// 实例化一个硬盘文件工厂,用来配置上传组件
DiskFileItemFactory dfif = new DiskFileItemFactory();
// 设置上传文件时用于临时存放文件的内存大小,这里是4K.多于的部分将临时存在硬盘
dfif.setSizeThreshold(4096); // 设置存放临时文件的目录,web根目录下的ImagesUploadTemp目录
File tmpFile = new File(transactionImportTemp);
if (!tmpFile.exists()) {
tmpFile.mkdirs();
}
dfif.setRepository(tmpFile);
// 用以上工厂实例化上传组件
ServletFileUpload sfu = new ServletFileUpload(dfif);
// 设置最大上传尺寸
sfu.setSizeMax(MAX_SIZE);
PrintWriter out=null;
try {
out = response.getWriter();
} catch (IOException e1) {
// TODO Auto-generated catch block
e1.printStackTrace();
}
// 从request得到 所有 上传域的列表
List fileList = null;
try {
fileList = sfu.parseRequest(request);
} catch (FileUploadException e) {
// 处理文件尺寸过大异常
e.printStackTrace();
if (e instanceof SizeLimitExceededException) {
out.println("文件尺寸超过规定大小:" + MAX_SIZE + "字节<p />");
out.println("<a href=\"upload.html\" target=\"_top\">返回</a>"); //
e.printStackTrace();
return;
}
}
// 没有文件上传
if (fileList == null || fileList.size() == 0) {
out.println("请选择上传文件<p />");
out.println("<a href=\"upload.html\" target=\"_top\">返回</a>"); //
return;
}
// 得到所有上传的文件
Iterator fileItr = fileList.iterator(); // 循环处理所有文件
while (fileItr.hasNext()) {
FileItem fileItem = null;
String path = null;
long size = 0;
// 得到当前文件
fileItem = (FileItem) fileItr.next();
// 忽略简单form字段而不是上传域的文件域(<input type="text" />等)
if (fileItem == null || fileItem.isFormField()) {
continue; // 得到文件的完整路径
}
path = fileItem.getName();
// 得到文件的大小
size = fileItem.getSize();
if ("".equals(path) || size == 0) {
out.println("请选择上传文件<p />");
out.println("<a href=\"upload.html\" target=\"_top\">返回</a>"); // return;
}
// 得到去除路径的文件名
String t_name = path.substring(path.lastIndexOf("\\") + 1);
// 得到文件的扩展名(无扩展名时将得到全名)
String t_ext = t_name.substring(t_name.lastIndexOf(".") + 1);
// 拒绝接受规定文件格式之外的文件类型
int allowFlag = 0;
int allowedExtCount = allowedExt.length;
for (; allowFlag < allowedExtCount; allowFlag++) {
if (allowedExt[allowFlag].equals(t_ext)) {
break;
}
}
if (allowFlag == allowedExtCount) {
out.println("请上传以下类型的文件<p />");
for (allowFlag = 0; allowFlag < allowedExtCount; allowFlag++) {
out.println("*." + allowedExt[allowFlag]
+ " ");
out
.println("<p /><a href=\"upload.html\" target=\"_top\">返回</a>"); // return;
}
}
// long now = System.currentTimeMillis();
// 根据系统时间生成上传后保存的文件名
// String prefix = String.valueOf(now);
// 保存的最终文件完整路径,保存在web根目录下的ImagesUploaded目录下
// String u_name = transactionImportTemp + prefix + "." + t_ext;
try { // 保存文件
fileItem.write(new File(t_name));
out.println("文件上传成功。已保存为:" + t_name + "。");
} catch (Exception e) {
e.printStackTrace();
}
}
}
}
import java.io.File;
import java.io.IOException;
import java.io.PrintWriter;
import java.util.Iterator;
import java.util.List;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;
import org.apache.commons.fileupload.FileItem;
import org.apache.commons.fileupload.FileUploadException;
import org.apache.commons.fileupload.FileUploadBase.SizeLimitExceededException;
import org.apache.commons.fileupload.disk.DiskFileItemFactory;
import org.apache.commons.fileupload.servlet.ServletFileUpload;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
/**
* 上传
* @author sfit1512
*
*/
@Controller
@RequestMapping("/upload")
public class UploadController {
@RequestMapping(value = "/upload", method = RequestMethod.POST)
public void upload(HttpServletRequest request,HttpServletResponse response,HttpSession session){
//String transactionImportTemp = (String) request.getSession().getServletContext().getAttribute(Constants.TRANSACTION_IMPORT_TEMP);
//String transactionImportTemp =request.getServletContext().getContextPath();
String transactionImportTemp = request.getSession().getServletContext().getRealPath("/pc-rs/novatar.frameimpl/scripts/static/upload");
//String transactionImportTemp ="E:\\upload";
// 设置上传文件最大为 3M
final long MAX_SIZE = 5 * 1024 * 1024;
// 允许上传的文件格式的列表 final
String[] allowedExt = new String[] { "xlsx" };
response.setContentType("text/html"); // 设置字符编码为UTF-8, 这样支持汉字显示
response.setCharacterEncoding("UTF-8");
// 实例化一个硬盘文件工厂,用来配置上传组件
DiskFileItemFactory dfif = new DiskFileItemFactory();
// 设置上传文件时用于临时存放文件的内存大小,这里是4K.多于的部分将临时存在硬盘
dfif.setSizeThreshold(4096); // 设置存放临时文件的目录,web根目录下的ImagesUploadTemp目录
File tmpFile = new File(transactionImportTemp);
if (!tmpFile.exists()) {
tmpFile.mkdirs();
}
dfif.setRepository(tmpFile);
// 用以上工厂实例化上传组件
ServletFileUpload sfu = new ServletFileUpload(dfif);
// 设置最大上传尺寸
sfu.setSizeMax(MAX_SIZE);
PrintWriter out=null;
try {
out = response.getWriter();
} catch (IOException e1) {
// TODO Auto-generated catch block
e1.printStackTrace();
}
// 从request得到 所有 上传域的列表
List fileList = null;
try {
fileList = sfu.parseRequest(request);
} catch (FileUploadException e) {
// 处理文件尺寸过大异常
e.printStackTrace();
if (e instanceof SizeLimitExceededException) {
out.println("文件尺寸超过规定大小:" + MAX_SIZE + "字节<p />");
out.println("<a href=\"upload.html\" target=\"_top\">返回</a>"); //
e.printStackTrace();
return;
}
}
// 没有文件上传
if (fileList == null || fileList.size() == 0) {
out.println("请选择上传文件<p />");
out.println("<a href=\"upload.html\" target=\"_top\">返回</a>"); //
return;
}
// 得到所有上传的文件
Iterator fileItr = fileList.iterator(); // 循环处理所有文件
while (fileItr.hasNext()) {
FileItem fileItem = null;
String path = null;
long size = 0;
// 得到当前文件
fileItem = (FileItem) fileItr.next();
// 忽略简单form字段而不是上传域的文件域(<input type="text" />等)
if (fileItem == null || fileItem.isFormField()) {
continue; // 得到文件的完整路径
}
path = fileItem.getName();
// 得到文件的大小
size = fileItem.getSize();
if ("".equals(path) || size == 0) {
out.println("请选择上传文件<p />");
out.println("<a href=\"upload.html\" target=\"_top\">返回</a>"); // return;
}
// 得到去除路径的文件名
String t_name = path.substring(path.lastIndexOf("\\") + 1);
// 得到文件的扩展名(无扩展名时将得到全名)
String t_ext = t_name.substring(t_name.lastIndexOf(".") + 1);
// 拒绝接受规定文件格式之外的文件类型
int allowFlag = 0;
int allowedExtCount = allowedExt.length;
for (; allowFlag < allowedExtCount; allowFlag++) {
if (allowedExt[allowFlag].equals(t_ext)) {
break;
}
}
if (allowFlag == allowedExtCount) {
out.println("请上传以下类型的文件<p />");
for (allowFlag = 0; allowFlag < allowedExtCount; allowFlag++) {
out.println("*." + allowedExt[allowFlag]
+ " ");
out
.println("<p /><a href=\"upload.html\" target=\"_top\">返回</a>"); // return;
}
}
// long now = System.currentTimeMillis();
// 根据系统时间生成上传后保存的文件名
// String prefix = String.valueOf(now);
// 保存的最终文件完整路径,保存在web根目录下的ImagesUploaded目录下
// String u_name = transactionImportTemp + prefix + "." + t_ext;
try { // 保存文件
fileItem.write(new File(t_name));
out.println("文件上传成功。已保存为:" + t_name + "。");
} catch (Exception e) {
e.printStackTrace();
}
}
}
}
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