SSH框架中实现文件的上传功能

来源：互联网发布：韩春雨实验重复知乎编辑：程序博客网时间：2024/05/16 08:26

1.上传页面代码 upload.jsp

<body> <form action="upload.action" method="post" enctype="multipart/form-data" >      请选择需要上传的文件：<input type="file" id="dofile" name="file"/><br />     <input type="submit" id="btnupload" name="btnupload" value="开始上传"> </form>  </body>

2.通过struts的控制跳转的action代码，将选择的文件通过流上传到项目目录下的upload文件夹中。

package com.boya.action;import java.io.File;import java.io.FileInputStream;import java.io.FileNotFoundException;import java.io.FileOutputStream;import java.io.IOException;import java.io.InputStream;import java.io.OutputStream;import java.util.List;import org.apache.struts2.ServletActionContext;import com.opensymphony.xwork2.ActionSupport;public class uploadAction extends ActionSupport {      //上传文件存放路径      private final static String UPLOADDIR = "/upload";      //上传文件集合      private List<File> file;      //上传文件名集合      private List<String> fileFileName;      //上传文件内容类型集合      private List<String> fileContentType;      public List<File> getFile() {          return file;      }      public void setFile(List<File> file) {          this.file = file;      }     public List<String> getFileFileName() {         return fileFileName;     }      public void setFileFileName(List<String> fileFileName) {          this.fileFileName = fileFileName;      }      public List<String> getFileContentType() {          return fileContentType;      }      public void setFileContentType(List<String> fileContentType) {          this.fileContentType = fileContentType;      }      public String execute() throws Exception {      System.out.println(this.getFileFileName());         for (int i = 0; i < file.size(); i++) {              //循环上传每个文件              uploadFile(i);          }          return "success";      }      //执行上传功能      private void uploadFile(int i) throws FileNotFoundException, IOException {          try {              InputStream in = new FileInputStream(file.get(i));              String dir = ServletActionContext.getRequest().getRealPath(UPLOADDIR);             File fileLocation = new File(dir);             //此处也可以在应用根目录手动建立目标上传目录             if(!fileLocation.exists()){                 boolean isCreated  = fileLocation.mkdir();                 if(!isCreated) {                     //目标上传目录创建失败,可做其他处理,例如抛出自定义异常等,一般应该不会出现这种情况。                     return;                 }             }             String fileName=this.getFileFileName().get(i);             File uploadFile = new File(dir, fileName);              OutputStream out = new FileOutputStream(uploadFile);              byte[] buffer = new byte[1024 * 1024];              int length;              while ((length = in.read(buffer)) > 0) {                  out.write(buffer, 0, length);              }              in.close();              out.close();          } catch (FileNotFoundException ex) {          System.out.println("上传失败!");             ex.printStackTrace();          } catch (IOException ex) {          System.out.println("上传失败!");             ex.printStackTrace();          }      }  }