利用apache的fileupload组件实现文件的上传
利用apache的fileupload组件实现文件的上传<!-- 正文开始 --> package org.xxm;
import java.io.BufferedInputStream;
import java.io.BufferedOutputStream;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.util.Iterator;
import java.util.List;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import dareway.org.apache.commons.fileupload.FileItem;
import dareway.org.apache.commons.fileupload.FileUploadBase.SizeLimitExceededException;
import dareway.org.apache.commons.fileupload.disk.DiskFileItemFactory;
import dareway.org.apache.commons.fileupload.servlet.ServletFileUpload;
import dareway.org.apache.commons.fileupload.util.Streams;
public class UploadFileServlet extends HttpServlet {
public void doGet(HttpServletRequest req,
HttpServletResponse res) {
return;
}
public void doPost(HttpServletRequest req,
HttpServletResponse res) throws IOException {
if(ServletFileUpload.isMultipartContent(req)) {
req.setCharacterEncoding("utf-8");
DiskFileItemFactory factory = new DiskFileItemFactory();
factory.setRepository(new File("../webapps/fileupload/tmp"));
//内存最大占用
factory.setSizeThreshold(1024000);
ServletFileUpload sfu = new ServletFileUpload(factory);
//单个文件最大值byte
sfu.setFileSizeMax(102400000);
//所有上传文件的总和最大值byte
sfu.setSizeMax(204800000);
List items = null;
try {
items = sfu.parseRequest(req);
} catch (SizeLimitExceededException e) {
System.out.println("size limit exception!");
} catch(Exception e) {
e.printStackTrace();
}
Iterator iter = items==null?null:items.iterator();
while(iter != null && iter.hasNext()) {
FileItem item = (FileItem)iter.next();
//简单的表单域
if(item.isFormField()) {
System.out.print("form field:");
System.out.print(item.getFieldName() + " ");
System.out.print(item.getString());
}
//文件域
else if(!item.isFormField()) {
System.out.println("client name:" + item.getName());
String fileName = item.getName().substring(item.getName().lastIndexOf("\"));
BufferedInputStream in = new BufferedInputStream(item.getInputStream());
//文件存储在工程的upload目录下,这个目录也得存在
BufferedOutputStream out = new BufferedOutputStream(
new FileOutputStream(new File("../webapps/fileupload/upload/" + fileName)));
Streams.copy(in, out, true);
}
}
} else {
System.out.println("enctype error!");
}
}
}
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