struts2入门实例4 经典入门必备

package com.upload.action; import java.io.File; import java.io.FileInputStream; import java.io.FileOutputStream; import java.io.InputStream; import com.opensymphony.xwork2.ActionSupport; import com.sun.xml.internal.messaging.saaj.packaging.mime.internet.ContentType; public class UploadAction extends ActionSupport { private File upload; private String uploadContentType; private String uploadFileName; private String FileName; private String uploadpathString = "C:\\"; private String allowTypes; private String result; public File getUpload() { return upload; } public void setUpload(File upload) { this.upload = upload; } public String getUploadContentType() { return uploadContentType; } public void setUploadContentType(String uploadContentType) { this.uploadContentType = uploadContentType; } public String getUploadFileName() { return uploadFileName; } public void setUploadFileName(String uploadFileName) { this.uploadFileName = uploadFileName; } public String getFileName() { return FileName; } public void setFileName(String fileName) { FileName = fileName; } public String getUploadpathString() { return uploadpathString; } public void setUploadpathString(String uploadpathString) { this.uploadpathString = uploadpathString; } public String getAllowTypes() { return allowTypes; } public void setAllowTypes(String allowTypes) { this.allowTypes = allowTypes; } public String getResult() { return result; } public void setResult(String result) { this.result = result; } public boolean allowType(String contetnType) { String[] types = allowTypes.split(","); for (String type : types) { if (uploadContentType.equals(type.trim())) return true; } return false; } public String execute() throws Exception { String fn = ""; // 获得上传的文件的名字 if (!allowType(uploadContentType)) { result = "不支持此种文件！"; } else { if (FileName.equals("")) { fn = uploadpathString + uploadFileName; } else { fn = uploadpathString + FileName; } if (new File(fn).exists()) { result = "该文件已经存在，请为文件指定一个新的文件名！"; } else { FileOutputStream fos = new FileOutputStream(fn); InputStream is = new FileInputStream(upload); byte[] buffer = new byte[8192];// 每次读8K字节 int count = 0; // 文件是否结束判断 while ((count = is.read(buffer)) > 0) { fos.write(buffer, 0, count); } fos.close(); is.close(); result = "文件上传成功！"; } } return "success"; } }