strusts2文件上传下载，以及二进制图片显示问题

1.文件上传

1.1页面

<s:file name="upload" id="logoUpLoad"></s:file>

也可以用html的<file> 标签

1.2action

public String getFileRealPath(String filename){

String realPath = uploadPath;

if(StringUtils.isNotBlank(uploadDir)){

if(realPath.endsWith(File.separator)){

realPath = realPath+uploadDir;

}else{

realPath = realPath+"/"+uploadDir;

}

}

if(realPath.endsWith(File.separator)){

realPath = realPath+filename;

}else{

realPath = realPath+"/"+filename;

}

System.out.println("上传路径:"+realPath);

return realPath;

}

/**

* 上传文件

* @return

*/

public String uploadFiles(){

if(upload == null || upload.length == 0){

addActionError("要上传的文件不存在，请先选择文件再上传");

return ERROR;

}

// deleteFiles();

//获得上传文件的路径

uploadedFileNames = new String[upload.length];

try {

for (int i = 0; i < upload.length; i++) {

if(!upload[i].exists()){

continue;

}

String filename = uploadFileName[i];

String name = DateUtils.convertDate2String

("yyyy_MM_dd_hh_mm_ss", new Date())+"_"+System.currentTimeMillis()

+"."+com.cbsi.saas.util.SAASStringUtils.getExtension(filename, "");

File destFile = new File(getFileRealPath(name));

//需要引入jar

FileUtils.copyFile(upload[i], destFile);

uploadedFileNames[i] = name;

}

} catch (IOException e) {

addActionError("上传文件失败，请稍候重试");

log.error("上传文件失败",e);

return ERROR;

}

return SUCCESS;

}

private String uploadDir;//子目录

private String uploadPath;//要上传的目标文件夹

private File[] upload;//要上传的文件

private String[] uploadFileName; //上传的文件名 (1.系统自动注入 2.变量命名有规则: 前台对象名+"FileName")

private String[] uploadedFileNames;//上传后的文件名称

private String[] deleteOnUploadFileNames;//当上传的时候，同时要删除的文件名

private String downloadfile;//要下载的文件名

服务器图片页面显示

/**

* 下载图片

*

* @return

*/

public String loadEnterpriseLogo() {

System.out.println("downLoad enterprise logo");

// 获得上传文件的路径

try {

File file = new File(getFileRealPath(enterprise.getTrademark()));

FileInputStream fileInputStream = new FileInputStream(file);

byte[] buffer = new byte[1024 * 4];

int bytesRead = 0;

sout = ServletActionContext.getResponse().getOutputStream();

while ((bytesRead = fileInputStream.read(buffer)) != -1) {

sout.write(buffer, 0, bytesRead);

}

fileInputStream.close();

sout.flush();

sout.close();

} catch (Exception e) {

}

return null;

}

<img

src="member/loadEnterpriseLogo.action?enterprise.trademark=${enterprise.trademark }"

width="450xp" height="150xp" />