文件上传struts2 实现文件上传功能(2)

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struts2

Servlet Java OS Apache JSP

（二）手动采用fileupload组建进行文件上传
upload2.jsp

<%@ page language="java" contentType="text/html; charset=GB18030"
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pageEncoding="GB18030"%>
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<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
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<html>
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<head>
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<title>Insert title here</title>
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</head>
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<body>
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<form action="/MyStruts2/UploadServlet" method="post" enctype="multipart/form-data">
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username:
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<input type="text" name="username">
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<br>
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password:
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<input type="password" name="password">
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<br>
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file1:
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<input type="file" name="file1">
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<br>
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file2:
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<input type="file" name="file2">
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<br>
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<input type="submit" value=" submit ">
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</form>
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</body>
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</html>

web.xml中的配置

<servlet-name>UploadServlet</servlet-name>

<servlet-class>com.test.servlet.UploadServlet</servlet-class>

</servlet>

<servlet-mapping>

<servlet-name>UploadServlet</servlet-name>

<url-pattern>/UploadServlet</url-pattern>

</servlet-mapping>

UploadServle.java

package com.test.servlet;
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import java.io.File;
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import java.io.FileOutputStream;
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import java.io.IOException;
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import java.io.InputStream;
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import java.io.OutputStream;
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import java.util.List;
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import javax.servlet.ServletException;
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import javax.servlet.http.HttpServlet;
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import javax.servlet.http.HttpServletRequest;
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import javax.servlet.http.HttpServletResponse;
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import org.apache.commons.fileupload.FileItem;
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import org.apache.commons.fileupload.FileUploadException;
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import org.apache.commons.fileupload.disk.DiskFileItemFactory;
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import org.apache.commons.fileupload.servlet.ServletFileUpload;
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@SuppressWarnings("serial")
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public class UploadServlet extends HttpServlet {
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@SuppressWarnings( { "unchecked", "deprecation" })
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public void doPost(HttpServletRequest request, HttpServletResponse response)
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throws ServletException, IOException {
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DiskFileItemFactory factory = new DiskFileItemFactory();
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String path = request.getRealPath("/upload");
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factory.setRepository(new File(path));
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factory.setSizeThreshold(1024 * 1024);
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ServletFileUpload upload = new ServletFileUpload(factory);
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try {
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List<FileItem> list = upload.parseRequest(request);
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for (FileItem item : list) {
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if (item.isFormField()) {
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String name = item.getFieldName();
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String value = item.getString("gbk");
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System.out.println(name);
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request.setAttribute(name, value);
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} else {
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String name = item.getFieldName();
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String value = item.getName();
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int start = value.lastIndexOf("\\");
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String fileName = value.substring(start + 1);
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request.setAttribute(name, fileName);
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item.write(new File(path, fileName));
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OutputStream os = new FileOutputStream(new File(path,
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fileName));
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InputStream is = item.getInputStream();
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byte[] buffer = new byte[400];
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int length = 0;
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while ((length = is.read(buffer)) > 0) {
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os.write(buffer, 0, length);
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}
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os.close();
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is.close();
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}
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}
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}
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catch (Exception ex) {
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ex.printStackTrace();
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}
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request.getRequestDispatcher("upload/result2.jsp").forward(request,
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response);
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}
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}

结果：

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文件上传struts2 实现文件上传功能(3) | 文件上传struts2 实现文件上传功能(1)

2009-08-22 15:31
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