Struts2 Struts文件上传API的突然行为，当通过Struts API上传到服务器上时，文件会损坏

我有一个web项目，我正在使用Struts2框架。在这里人们上传pdf文件，为此我使用了struts文件上传API

但奇怪的是，服务器上每秒钟上传一次文件都会被破坏，当我试图打开文件时，会出现错误：

打开此文档时出错。文件已损坏，无法修复。

struts.xml

<action name="uploadFiles" class="org.webpannel.action.FileHandlingAction"
        method="saveFiles">
        <interceptor-ref name="customeUploadStack" />
        <result name="success">/admin/WindowCloser.jsp</result>
        <result name="input">/service/AttachmentPopup.jsp</result>
    </action>

/admin/WindowCloser.jsp
/service/AttachmentPopup.jsp

文件处理操作：

public class FileHandlingAction extends BaseAction implements Preparable{
/**
 * 
 */
private static final long serialVersionUID = -470622101009022548L;
private File[] file;
private String[] contentType;
private String[] filename;
private List<String> attachmentsList= new ArrayList<String>();
private String directoryPath;
// the name is written like this, so that no one can easily manipulate.
private String istbamefi;
private static Logger logger = Logger.getLogger(FileHandlingAction.class);

public void prepare() throws Exception {

    directoryPath = getText("attachments.dirctory")+File.separator+getS3IdFromSession();
    System.out.println("directoryPath::"+directoryPath);
}
@Override
public String execute() throws Exception {
    try{

        File[] filesStored = Utility.listFilesInDirectory(directoryPath);
        if(filesStored==null){
            return SUCCESS;
        }
        for(File fil : filesStored){
            attachmentsList.add(fil.getName());
        }
    }catch(Exception e1){
        logger.error(e1.getMessage(),e1);
    }
    return SUCCESS;
}
public String saveFiles() {
    logger.info("Going to save the Uploaded files");
    if(logger.isDebugEnabled()){
        logger.debug("Directory path :"+directoryPath);
        if(file==null){
            addActionMessage("Please Select a file to upload");
            return INPUT;
        }
        for (File f : file) {
            logger.debug("File :"+f);
        }
    }
    for (int i = 0; i < file.length; i++) {
        try {
            uploadDocument(file[i], filename[i]);
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
    logger.info("Exiting successfully after saving the files:");
    setMessage("succesfully saved the files");
    return SUCCESS;
}
public String removeFile(){
    logger.debug("Going to delete file:"+istbamefi);

    File file = new File(directoryPath+File.separator+istbamefi);
    if(file.exists()){
        logger.debug("File found");
        file.delete();
        logger.debug("File Deleted");
    }else{
        logger.debug("File Doest not exists");
        setMessage("File Does not exists");
        return SUCCESS;
    }
    setMessage("File Successfully Removed");
    return SUCCESS;
}
private void uploadDocument(File file, String fileName) throws IOException {

    FileInputStream in = null;
    FileOutputStream out = null;
    File dir = new File(directoryPath);
    if (!dir.exists()) {
        dir.mkdir();
    }
     logger.info("Uploaded File Name :" +fileName);
     logger.info("Uploaded File Length :" +file.length());
    String targetPath = dir.getPath() + File.separator + fileName;
    System.out.println("targetPath::"+targetPath);
    File picDestination = new File(targetPath);
     logger.info("Destination Path :"+picDestination);
    try {
        in = new FileInputStream(file);
        out = new FileOutputStream(picDestination);
        int c;

        while ((c = in.read()) != -1) {
            out.write(c);


        }

    } finally {
        if (in != null) {
            in.close();
        }
        if (out != null) {
            out.close();
        }
    }
}
public List<String> getAttachmentsList() {
    return attachmentsList;
}
public void setAttachmentsList(List<String> attachmentsList) {
    this.attachmentsList = attachmentsList;
}
public File[] getFile() {
    return file;
}
public void setFile(File[] file) {
    this.file = file;
}
public String[] getContentType() {
    return contentType;
}
public void setContentType(String[] contentType) {
    this.contentType = contentType;
}
public String[] getFilename() {
    return filename;
}
public void setUpload(File[] file) {
    this.file = file;
}

public void setUploadContentType(String[] contentType) {
    this.contentType = contentType;
}

public void setUploadFileName(String[] filename) {
    this.filename = filename;
}
public void setFilename(String[] filename) {
    this.filename = filename;
}
public String getDirectoryPath() {
    return directoryPath;
}
public void setDirectoryPath(String directoryPath) {
    this.directoryPath = directoryPath;
}
public String getIstbamefi() {
    return istbamefi;
}
public void setIstbamefi(String istbamefi) {
    this.istbamefi = istbamefi;
}

}

公共类FileHandlingAction扩展了BaseAction实现了Preparable{
/**
* 
*/
私有静态最终长serialVersionUID=-470622101009022548L；
私有文件[]文件；
私有字符串[]contentType；
私有字符串[]文件名；
私有列表attachmentsList=new ArrayList（）；
私有字符串目录路径；
//名字是这样写的，所以没有人可以轻易地操纵。
私有字符串istbamefi；
私有静态记录器=Logger.getLogger（FileHandlingAction.class）；
public void prepare（）引发异常{
directoryPath=getText（“attachments.directory”）+File.separator+getS3IdFromSession（）；
System.out.println（“directoryPath:：”+directoryPath）；
}
@凌驾
公共字符串execute（）引发异常{
试一试{
File[]filestored=Utility.listFilesInDirectory（directoryPath）；
if（filestored==null）{
回归成功；
}
for（文件fil:filestored）{
attachmentsList.add（fil.getName（））；
}
}捕获（异常e1）{
logger.error（e1.getMessage（），e1）；
}
回归成功；
}
公共字符串saveFiles（）{
logger.info（“将保存上传的文件”）；
if（logger.isDebugEnabled（））{
debug（“目录路径：”+directoryPath）；
if（file==null）{
addActionMessage（“请选择要上载的文件”）；
返回输入；
}
for（文件f:File）{
调试（“文件：”+f）；
}
}
for（int i=0；i

您能检查一下PDF是否有一些内容，或者是否为空（0Kb）？无论哪种情况，发布您的codeYa PDF文件都有内容。它是4 MB，您的操作类

FileHandlingAction

是什么样子的？对于上面代码中的FileHandlingAction，不要自己读/写文件。使用类似于

FileUtils.copyFile

的内容。