java文件上传，Struts2文件上传，demo下载
闲话不说，下载附件吧，可以运行的demo

简单的介绍下，附件中一个是基于smartupload的文件上传，另一个是struts2的文件上传。

例一核心代码如下：

package com.uploadfile;import java.io.IOException;import javax.servlet.ServletContext;import javax.servlet.ServletException;import javax.servlet.http.HttpServlet;import javax.servlet.http.HttpServletRequest;import javax.servlet.http.HttpServletResponse;import com.jspsmart.upload.File;import com.jspsmart.upload.SmartUpload;public class UploadfileServlet extends HttpServlet{public void doGet(HttpServletRequest request, HttpServletResponse response)throws ServletException, IOException {doPost(request, response);}public void doPost(HttpServletRequest request, HttpServletResponse response)throws ServletException, IOException {try {// 上传后图片存储的位置。ServletContext application = this.getServletContext();String filePath = "d:/upload";System.out.println(filePath);// 对本地文件和目录抽象表示。java.io.File file = new java.io.File(filePath);// 判断文件或目录是否存在。if (!file.exists()) {file.mkdir();// 目录不存在的情况下，创建目录。}// 做文件上传的基础类，里面有关于文件上传的方法。SmartUpload mysmart = new SmartUpload();// 初始化。mysmart.initialize(this.getServletConfig(), request, response);// 上传.mysmart.upload();// 循环取到我要上传的每一个文件。for (int i = 0; i < mysmart.getFiles().getCount(); i++) {// 取到其中一个File myfile = mysmart.getFiles().getFile(i);// 判断文件是否丢失。if (!myfile.isMissing()) {// 没有丢失// 保存文件myfile.saveAs(filePath + "/" + myfile.getFileName(),File.SAVEAS_PHYSICAL);}}System.out.println("上传成功");} catch (Exception e) {System.out.println("上传失败！");}// 返回登录成功，显示头像。request.getRequestDispatcher("/success.jsp").forward(request, response);}}

例二核心代码如下：

package com.uploadfile.action;import java.io.BufferedInputStream;import java.io.BufferedOutputStream;import java.io.File;import java.io.FileInputStream;import java.io.FileOutputStream;import java.io.IOException;import java.io.InputStream;import java.io.OutputStream;import java.util.Date;import org.apache.struts2.ServletActionContext;import com.opensymphony.xwork2.ActionSupport;public class UploadFileAction extends ActionSupport{private static final long serialVersionUID = 572146812454l;private static final int BUFFER_SIZE = 16 * 1024;private File myFile;private String contentType;private String fileName;private String filePath;public String getFilePath() {return filePath;}public void setFilePath(String filePath) {this.filePath = filePath;}public void setMyFileContentType(String contentType) {this.contentType = contentType;}public void setMyFileFileName(String fileName) {this.fileName = fileName;}public void setMyFile(File myFile) {this.myFile = myFile;}public String getContentType() {return contentType;}public String getFileName() {return fileName;}public File getMyFile() {return myFile;}private static void copy(File src, File dst) {try {InputStream in = null;OutputStream out = null;try {in = new BufferedInputStream(new FileInputStream(src),BUFFER_SIZE);out = new BufferedOutputStream(new FileOutputStream(dst),BUFFER_SIZE);byte[] buffer = new byte[BUFFER_SIZE];while (in.read(buffer) > 0) {out.write(buffer);}} finally {if (null != in) {in.close();}if (null != out) {out.close();}}} catch (Exception e) {e.printStackTrace();}}public String uploadFileByStruts2(){File file1 = new File(filePath);// 判断文件或目录是否存在。if (!file1.exists()) {file1.mkdir();// 目录不存在的情况下，创建目录。}System.out.println(fileName);System.out.println(contentType);File file = new File(filePath+"/"+fileName);copy(myFile, file);System.out.println("执行结束"+filePath);return "success";}}

1 楼 zxl102070 2012-04-10 diyige 就是单一的上传