纯jsp下传文件到服务器（利用了struts）
日期：2014-05-16 浏览次数：20369 次
需要写一个from一个action和页面：
1.页面：
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<%@ page language="java" contentType="text/html; charset=utf-8"
??? pageEncoding="gb2312"%>
<html>
<body>
??? ??? ?? <form action="<%=request.getContextPath()
%>/admin/HtmlFile.do" method="post" enctype="multipart/form-data"
name="HtmlFileForm">
??? ??? ??? ??? ??? ??? <input type="file" name="file"
/>
??? ??? ??? ??? ??? <html:submit />
??? ??? ??? ??? ??? </form>
</body>
</html>
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2.写文件Form
import org.apache.struts.action.ActionForm;
import org.apache.struts.upload.FormFile;
public class HtmlFileForm extends ActionForm {
??? private static final long serialVersionUID = -8008580023746850586L;
??? public HtmlFileForm() {
??? }
??? private FormFile file;
??? public FormFile getFile() {
??? ??? return this.file;
??? }
??? public void setFile(FormFile file) {
??? ??? this.file = file;
??? }
??? private String fname;
??? public String getFname() {
??? ??? return fname;
??? }
??? public void setFname(String fname) {
??? ??? this.fname = fname;
??? }
??? private String size;
??? public String getSize() {
??? ??? return size;
??? }
??? public void setSize(String size) {
??? ??? this.size = size;
??? }
}
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3.写Action
import java.io.FileOutputStream;
import java.io.InputStream;
import java.io.OutputStream;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.apache.struts.action.Action;
import org.apache.struts.action.ActionForm;
import org.apache.struts.action.ActionForward;
import org.apache.struts.action.ActionMapping;
import org.apache.struts.upload.FormFile;
public class HtmlFileAction extends Action {
??? public ActionForward execute(ActionMapping mapping, ActionForm form,
??? ??? ??? HttpServletRequest request, HttpServletResponse response)
??? ??? ??? throws Exception {
??? ??? String dir = servlet.getServletContext().getRealPath("/upload");
??? ??? HtmlFileForm hff = (HtmlFileForm) form;
??? ??? FormFile file = hff.getFile();
??? ??? // if no file was uploaded,then display View
??? ??? if (file == null) {
??? ??? ??? return mapping.findForward("fail");
??? ??? }
??? ??? // Get name and file size
??? ??? String fname = file.getFileName();
??? ??? String size = Integer.toString(file.getFileSize()) + "bytes";
??? ??? InputStream streamIn = file.getInputStream();
??? ??? OutputStream streamOut = new FileOutputStream(dir + "/" +
fname);
??? ??? int bytesRead = 0;
??? ??? byte[] buffer = new byte[8192];
??? ??? while((bytesRead = streamIn.read(buffer,0,8192))!=-1){
??? ??? ??? streamOut.write(buffer,0,bytesRead);
??? ??? }
??? ???
??? ??? streamOut.close();
??? ??? streamIn.close();
??? ???
??? ??? //
??? ??? hff.setFname(fname);
??? ???
??? ??? //Clean up our toys when done playing
??? ??? file.destroy();
??? ??? ???
??? ??? //Forward to default display
??? ??? request.setAttribute("inputfile", fname);
??? ??? return mapping.findForward("success");
??? }
}
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结束部署运行看看结果吧。
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用了struts1.2的jar包，如何添加jar包：如果用Eclipse可以在项目上右键直接从MyEclipse-->Add struts .
如图
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