ACTION中直接上傳圖片或者文檔 .

時間 2019-12-06

標籤 action 直接上傳圖片或者文檔简体版

原文原文鏈接

1. 先在頁面處配置上傳按鈕：html

form中須要添加 enctype="multipart/form-data" 參數，以下java

<html:form action="/menuSmart.shtml" enctype="multipart/form-data" method="post"> post

如下爲上傳按鈕，並外加顯示鏈接ui

[java] view plain copy print ?

<td class="dvtCellLabel">菜單圖片</td>
<td class="dvtCellInfo">
<html:file property="iconFile" />
<html:hidden property="icon"/>
<logic:notEmpty name="menuSmartForm" property="icon">
<a href="${menuSmartForm.icon}" target="_blank">查看</a>
</logic:notEmpty>
d>

2. 如下爲ACTION中的上傳文件操做代碼：spa

[java] view plain copy print ?

/**
* 文件上傳
* @param form
* @param request
* @param isUpdate
* @return
* @throws Exception
*/
protected String simpleUpload(ActionForm form, HttpServletRequest request, boolean isUpdate) throws Exception {
MenuForm menuForm = (MenuForm) form;
String result="" ;
FormFile file = null;
FormFile[] files = new FormFile[]{menuForm.getIconFile(),menuForm.getBgImgFile()};
for (int i = 0; i < files.length; i++) {
file = files[i];
if (file != null && !file.getFileName().equals("")) {
String endName = FileUtil.getFileExt(file.getFileName());
if(!(endName.toUpperCase().equals("PNG")||endName.toUpperCase().equals("JPG")||endName.toUpperCase().equals("GIF"))){
log.info("上傳的圖標文件不是圖片格式");
return null;
}
/*上至上傳相對路徑*/
String uploadPath = ("upload" + File.separator );
/*設置本地絕對路徑*/
String uploadDir = servlet.getServletContext().getRealPath(uploadPath);
try {
/*建立文件流信息*/
File nwFile = new File(uploadDir);
/*判斷是否存在改目錄文件夾*/
if (!nwFile.exists())
nwFile.mkdirs();
long uid = System.currentTimeMillis();
/*獲取文件後綴名*/
String fileExt = "." + endName;
String fname = uploadDir + File.separator + uid + fileExt;
InputStream streamIn = file.getInputStream();
OutputStream streamOut = new FileOutputStream(fname);
int bytesRead = 0;
byte[] buffer = new byte[8192];
/*開始寫文件*/
while ((bytesRead = streamIn.read(buffer, 0, 8192)) != -1) {
streamOut.write(buffer, 0, bytesRead);
}
streamOut.close();
streamIn.close();
file.destroy();
String realName = "upload" + "/"+ uid + fileExt;
/*將真實的文件名設置到FORM中*/
if(i==0){
menuForm.setIcon(realName);
}
if(i==1){
menuForm.setBgImg(realName);
}
result = "upload" + File.separator + uid + fileExt;
} catch (Exception e) {
log.error("上傳圖片信息是發生異常:"+e);
return null;
}
}
}
return result;
}

/** * 文件上傳 * @param form * @param request * @param isUpdate * @return * @throws Exception */ protected String simpleUpload(ActionForm form, HttpServletRequest request, boolean isUpdate) throws Exception { MenuForm menuForm = (MenuForm) form; String result="" ; FormFile file = null; FormFile[] files = new FormFile[]{menuForm.getIconFile(),menuForm.getBgImgFile()}; for (int i = 0; i < files.length; i++) { file = files[i]; if (file != null && !file.getFileName().equals("")) { String endName = FileUtil.getFileExt(file.getFileName()); if(!(endName.toUpperCase().equals("PNG")||endName.toUpperCase().equals("JPG")||endName.toUpperCase().equals("GIF"))){ log.info("上傳的圖標文件不是圖片格式"); return null; } /*上至上傳相對路徑*/ String uploadPath = ("upload" + File.separator ); /*設置本地絕對路徑*/ String uploadDir = servlet.getServletContext().getRealPath(uploadPath); try { /*建立文件流信息*/ File nwFile = new File(uploadDir); /*判斷是否存在改目錄文件夾*/ if (!nwFile.exists()) nwFile.mkdirs(); long uid = System.currentTimeMillis(); /*獲取文件後綴名*/ String fileExt = "." + endName; String fname = uploadDir + File.separator + uid + fileExt; InputStream streamIn = file.getInputStream(); OutputStream streamOut = new FileOutputStream(fname); int bytesRead = 0; byte[] buffer = new byte[8192]; /*開始寫文件*/ while ((bytesRead = streamIn.read(buffer, 0, 8192)) != -1) { streamOut.write(buffer, 0, bytesRead); } streamOut.close(); streamIn.close(); file.destroy(); String realName = "upload" + "/"+ uid + fileExt; /*將真實的文件名設置到FORM中*/ if(i==0){ menuForm.setIcon(realName); } if(i==1){ menuForm.setBgImg(realName); } result = "upload" + File.separator + uid + fileExt; } catch (Exception e) { log.error("上傳圖片信息是發生異常:"+e); return null; } } } return result; }

3. 若是還須要對文檔進行解壓縮操做，以及其餘的操做，請參考本博客中標題爲「AJAX上傳下載文件」的文章。.net