檔案上傳（三）

最後更新：2018-12-04 來源：互聯網

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使用struts2實現上傳，代碼將更簡單

上傳頁面upload.jsp，action類UploadAction.java

upload.jsp(上傳多個檔案)

<body>
  <s:form action="upload" method="post" enctype="multipart/form-data">
   <table align="center" width="60%" border="1">
    <tr>
     <td>
      username
     </td>
     <td>
      <s:textfield name="username" />
     </td>

</tr>

    <tr>
     <td>
      password
     </td>
     <td>
      <s:password name="password"></s:password>
     </td>

</tr>

    </tr>
    <tr>
     <td colspan="2">
      <s:submit></s:submit>
     </td>
    </tr>
   </table>
  </s:form>
</body>

UploadAction.java

public class UploadAction extends ActionSupport {

private String username;

private String password;

//上傳多個檔案，屬性放入list中
private List<File> file;

//以下兩屬性對應struts jar包中類FileUploadInterceptor.class中（254行）
private List<String> fileFileName;

private List<String> fileContentType;

public String execute() throws Exception {

  for (int i = 0; i < file.size(); i++) {

   //上傳檔案傳入輸入資料流
   InputStream is = new FileInputStream(file.get(i));

   //指定上傳路徑
   String root = ServletActionContext.getRequest().getRealPath(
     "/upload");


   File destFile = new File(root, this.getFileFileName().get(i));

   OutputStream os = new FileOutputStream(destFile);

byte[] buffer = new byte[400];

int length = 0;

   while ((length = is.read(buffer)) > 0) {
    os.write(buffer, 0, length);
   }
   is.close();
   os.close();
  }
  return SUCCESS;

}

public String getUsername() {
return username;
}

public void setUsername(String username) {
this.username = username;
}

public String getPassword() {
return password;
}

public void setPassword(String password) {
this.password = password;
}

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;
}

}

struts.xml

<action name="upload" class="com.test.action.UploadAction">
      <result name="success">/upload/uploadresult.jsp</result>
      <result name="input">/upload/upload.jsp</result>
     </action>

uploadresult.jsp

<body>
username:<s:property value="username"/><br>

password:<s:property value="password"/><br>

file1:<s:property value="file"/><br>

</body>

接下來可以擴充，上傳多個檔案，判斷檔案格式和大小

本文章原先以中文撰寫並發佈於 aliyun.com，亦設英文版本，僅作資訊用途。本網站不對文章的準確性，完整性或可靠性或其任何翻譯作出任何明示或暗示的陳述或保證。如對該文章有任何疑慮或投訴，請傳送電郵至 info-contact@alibabacloud.com 並提供相關疑慮或投訴的詳細說明。職員會於 5 個工作天內與您聯絡，一經驗證之後，即會刪除該侵權內容。

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檔案上傳（三）

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