javastruts2上传文件

链接&＃xff1a;https://www.cnblogs.com/wkrbky/p/5904787.html

Struts2文件上传&＃xff08;基于表单的文件上传&＃xff09;
•Commons-FileUpload组件
–Commons是Apache开放源代码组织的一个Java子项目&＃xff0c;其中的FileUpload是用来处理HTTP文件上传的子项目

•Commons-FileUpload组件特点
–使用简单&＃xff1a;可以方便地嵌入到JSP文件中&＃xff0c;编写少量代码即可完成文件的上传功能
–能够全程控制上传内容
–能够对上传文件的大小、类型进行控制

•需要下载Common-FileUplaod框架地址&＃xff08;当然MyEclipce中Struts2支持里自带有这两个包&＃xff09;&＃xff1a;
–http://jakarta.apache.org/commons/fileupload/
–下载commons-fileupload-1.2-bin.zip文件
–解压后得到commons-fileupload-1.2.jar

–http://jakarta.apache.org/commons/io/
–下载commons-io-1.3.2-bin.zip文件
–解压后得到commons-io-1.3.2.jar

基于表单的文件上传

•注意&＃xff1a;上面是基于表单的上传&＃xff0c;在form标签中有一个必须的属性值设置&＃xff1a;enctype.

•如果要做文件上传功能必须将enctype值设为multipart/form-data.

•此外&＃xff0c;文件上传还需要二个JAR文件支持&＃xff1a;

文件上传页面upload.jsp&＃xff08;二选一表单即可&＃xff09;

<%&＃64; taglib uri&＃61;"/struts-tags" prefix&＃61;“s”%>

文件&＃xff1a;或者&＃xff08;两个表单二选一即可&＃xff09;



Struts2.xml

500000000text/plain,application/vnd.ms-powerpoint.txt,.ppt/success.jsp/error.jsp

附加&＃xff1a;contentType类型设置

上传Action类UploadAction-简单的保存文件方式

package com.struts;

import java.io.File;
import java.io.IOException;

import org.apache.commons.io.FileUtils;
import org.apache.struts2.ServletActionContext;

import com.opensymphony.xwork2.ActionSupport;

public class UploadAction extends ActionSupport {

private File uploadImage; //得到上传的文件
private String uploadImageContentType; //得到文件的类型
private String uploadImageFileName; //得到文件的名称public String execute(){System.out.println("fileName:"&＃43;this.getUploadImageFileName());System.out.println("contentType:"&＃43;this.getUploadImageContentType());System.out.println("File:"&＃43;this.getUploadImage());//获取要保存文件夹的物理路径(绝对路径)String realPath&＃61;ServletActionContext.getServletContext().getRealPath("/upload");File file &＃61; new File(realPath);//测试此抽象路径名表示的文件或目录是否存在。若不存在&＃xff0c;创建此抽象路径名指定的目录&＃xff0c;包括所有必需但不存在的父目录。if(!file.exists())file.mkdirs();try {//保存文件FileUtils.copyFile(uploadImage, new File(file,uploadImageFileName));} catch (IOException e) {e.printStackTrace();}return SUCCESS;
}public File getUploadImage() {return uploadImage;
}public void setUploadImage(File uploadImage) {this.uploadImage &＃61; uploadImage;
}public String getUploadImageContentType() {return uploadImageContentType;
}public void setUploadImageContentType(String uploadImageContentType) {this.uploadImageContentType &＃61; uploadImageContentType;
}public String getUploadImageFileName() {return uploadImageFileName;
}public void setUploadImageFileName(String uploadImageFileName) {this.uploadImageFileName &＃61; uploadImageFileName;
}


}

上传成功页面&＃xff1a;

<%&＃64; taglib uri&＃61;"/struts-tags" prefix&＃61;“s”%>