javaee企业应用实战光盘源码04-01章

package org.crazyit.app.action; import com.opensymphony.xwork2.Action; import com.opensymphony.xwork2.ActionSupport; import org.apache.struts2.ServletActionContext; import java.io.File; import java.io.*; /** * Description: * <br/>网站: <a href="http://www.crazyit.org">疯狂Java联盟</a> * <br/>Copyright (C), 2001-2012, Yeeku.H.Lee * <br/>This program is protected by copyright laws. * <br/>Program Name: * <br/>Date: * @author Yeeku.H.Lee kongyeeku@163.com * @version 1.0 */ public class UploadAction extends ActionSupport { //封装文件标题请求参数的属性 private String title; //封装上传文件域的属性 private File upload; //封装上传文件类型的属性 private String uploadContentType; //封装上传文件名的属性 private String uploadFileName; //直接在struts.xml文件中配置的属性 private String savePath; //定义该Action允许上传的文件类型 private String allowTypes; //allowTypes属性的setter和getter方法 public String getAllowTypes() { return allowTypes; } public void setAllowTypes(String allowTypes) { this.allowTypes = allowTypes; } //接受struts.xml文件配置值的方法 public void setSavePath(String value) { this.savePath = value; } //返回上传文件的保存位置 private String getSavePath() throws Exception { return ServletActionContext.getServletContext() .getRealPath(savePath); } //文件标题的setter和getter方法 public void setTitle(String title) { this.title = title; } public String getTitle() { return (this.title); } //上传文件对应文件内容的setter和getter方法 public void setUpload(File upload) { this.upload = upload; } public File getUpload() { return (this.upload); } //上传文件的文件类型的setter和getter方法 public void setUploadContentType(String uploadContentType) { this.uploadContentType = uploadContentType; } public String getUploadContentType() { return (this.uploadContentType); } //上传文件的文件名的setter和getter方法 public void setUploadFileName(String uploadFileName) { this.uploadFileName = uploadFileName; } public String getUploadFileName() { return (this.uploadFileName); } @Override public String execute() throws Exception { //以服务器的文件保存地址和原文件名建立上传文件输出流 FileOutputStream fos = new FileOutputStream(getSavePath() + "\\" + getUploadFileName()); FileInputStream fis = new FileInputStream(getUpload()); byte[] buffer = new byte[1024]; int len = 0; while ((len = fis.read(buffer)) > 0) { fos.write(buffer , 0 , len); } fos.close(); return SUCCESS; } /** * 过滤文件类型 * @param types 系统所有允许上传的文件类型 * @return 如果上传文件的文件类型允许上传， * 返回null，否则返回error字符串 */ public String filterTypes(String[] types) { //获取希望上传的文件类型 String fileType = getUploadContentType(); for (String type : types) { if (type.equals(fileType)) { return null; } } return ERROR; } //执行输入校验 public void validate() { //将允许上传文件类型的字符串以英文逗号（,） //分解成字符串数组从而判断当前文件类型是否允许上传 String filterResult = filterType(getAllowTypes().split(",")); //如果当前文件类型不允许上传 if (filterResult != null) { //添加FieldError addFieldError("upload" , "您要上传的文件类型不正确！"); } } }