从 struts2 升级到 struts 6.3.0.2 后，当我尝试从我的应用程序下载 pdf 和 doc-x 文件时，该文件已损坏。当我上传到应用程序后从应用程序下载pdf文件时，我无法打开pdf文件。对于 doc-x 文件，它显示系统无法处理您的请求，这是错误文件中的自定义错误。控制台显示文件已下载成功，但仍无法打开doc-x文件。
这是我升级前的原始代码
import java.io.*;
import java.nio.file.Files;
import java.util.ResourceBundle;
public void downloadAttach(){
try {
String filename = DotsFormUtil.cleanStringFile(request.getParameter("filename"));
String realname = DotsFormUtil.cleanStringFile(request.getParameter("name"));
HttpSession session = (HttpSession) request.getSession();
String strDotsIdToken = (String) session.getAttribute("strDotsIdToken");
try{
if(strDotsIdToken == null || !strDotsIdToken.equals(filename.split("_")[0]))
logger.error("strDotsIdToken is null or strDotsIdToken is not equal and Exception is thrown");
}catch (Exception e){
logger.info(e);
}
try {
if(filename!= null){
ServletOutputStream out = null;
FileInputStream fi = null;
try {
ResourceBundle bundle = ResourceBundle.getBundle("resources.dotsDisplay");
String strDirectory=DotsFormUtil.cleanpString(bundle.getString("dots.attachments.path"));
File f= new File(FilenameUtils.normalize(DotsFormUtil.cleanString(strDirectory+File.separator + filename)));
String pattern = "[a-zA-Z0-9]{1,50}\\.[a-zA-Z0-9]{1,10}";
if(realname.matches(pattern)){
response.setHeader("Content-Disposition","attachment; fileName=" +realname);
}
response.addHeader("Content-Transfer-Encoding","base64");
out = response.getOutputStream();
fi= new FileInputStream(f);
byte[] buffer = new byte[(int)f.length()];
int readInt=fi.read(buffer);
try{
if(readInt != -1){
out.write(buffer);
out.flush();
}
}catch (Exception e){
logger.info(e);
}
} catch (FileNotFoundException e){
e.printStackTrace();
logger.info("File not found error" + filename);
logger.error(e.getMessage());
}catch (IOException e){
logger.info("error in reading file:" + filename);
}finally {
if(out != null) safeClose(out);
if(fi != null) safeClose(fi);
}
}
}catch (Exception e){
e.printStackTrace();
logger.error(e.getMessage(),e);
}
logger.info("successfully download attachment file");
}catch (Exception e){
e.printStackTrace();
}
}
public static String cleanStringFile(String- aString){
if(aString==null) return null;
String cleanString = "";
char cleanChar = '\0';
for(int i=0; i<aString.length(); i++){
cleanChar = cleanCharFile(aString.charAt(i));
if(cleanChar != '\0') cleanString+=cleanChar;
}
return cleanString;
}
private static char cleanCharFile(char aChar){
for(int i = 48; i<58; ++i){
if(aChar ==i) return (char) i;
}
for(int i = 65; i<91; ++i){
if(aChar ==i) return (char) i;
}
for(int i = 97; i<123; ++i){
if(aChar ==i) return (char) i;
}
switch (aChar){
case '.':
return '.';
case '_':
return '_';
case '-':
return '-';
case '!':
return '!';
}
return '\0';
}
这是我编辑的代码，但我仍然无法打开下载的 pdf 和 doc-x 文件
import java.io.FileInputStream;
import java.io.IOException;
import java.io.OutputStream;
import java.nio.file.Files;
import java.nio.file.Path;
public class getDotsMissionAction {
public void downloadAttach() {
// Your existing code...
try {
if (filename != null) {
try {
ResourceBundle bundle = ResourceBundle.getBundle("resources.dotsDisplay");
String strDirectory = DotsFormUtil.cleanString(bundle.getString("dots.attachments.path"));
File f = new File(strDirectory + File.separator + filename);
String pattern = "[a-zA-Z0-9]{1,50}\\.[a-zA-Z0-9]{1,10}";
if (realname.matches(pattern)) {
response.reset();
response.setCharacterEncoding("UTF-8");
response.setContentType("application/pdf");
response.setContentType("application/vnd.openxmlformats-officedocument.wordprocessingml.document");
response.setHeader("Content-Disposition", "attachment; fileName=" + realname);
try (FileInputStream fis = new FileInputStream(f);
OutputStream out2 = response.getOutputStream()) {
byte[] buffer = new byte[1024];
int bytesRead;
while ((bytesRead = fis.read(buffer)) != -1) {
out2.write(buffer, 0, bytesRead);
}
}
}
} catch (FileNotFoundException e) {
e.printStackTrace();
logger.error(e.getMessage());
}
}
} catch (FileNotFoundException e) {
e.printStackTrace();
logger.error(e.getMessage());
}
logger.info("successfully download attachment file");
}
import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.OutputStream;
import java.nio.file.Files;
import java.nio.file.Path;
import javax.servlet.http.HttpServletResponse;
public class getDotsMissionAction {
public void downloadAttach(HttpServletResponse response) {
// Your existing code...
try {
if (filename != null) {
ResourceBundle bundle = ResourceBundle.getBundle("resources.dotsDisplay");
String strDirectory = DotsFormUtil.cleanString(bundle.getString("dots.attachments.path"));
File f = new File(strDirectory + File.separator + filename);
String pattern = "[a-zA-Z0-9]{1,50}\\.[a-zA-Z0-9]{1,10}";
if (realname.matches(pattern)) {
response.reset();
response.setCharacterEncoding("UTF-8");
// Determine content type based on file extension
String contentType;
if (realname.toLowerCase().endsWith(".pdf")) {
contentType = "application/pdf";
} else if (realname.toLowerCase().endsWith(".docx")) {
contentType = "application/vnd.openxmlformats-officedocument.wordprocessingml.document";
} else {
// Add more content types as needed
contentType = "application/octet-stream"; // Default to binary
}
response.setContentType(contentType);
response.setHeader("Content-Disposition", "attachment; filename=" + realname);
try (FileInputStream fis = new FileInputStream(f);
OutputStream out2 = response.getOutputStream()) {
byte[] buffer = new byte[1024];
int bytesRead;
while ((bytesRead = fis.read(buffer)) != -1) {
out2.write(buffer, 0, bytesRead);
}
}
} else {
// Handle invalid filename pattern
// For example: Log an error, return a response indicating invalid file, etc.
}
}
} catch (FileNotFoundException e) {
e.printStackTrace();
logger.error(e.getMessage());
} catch (IOException e) {
e.printStackTrace();
logger.error(e.getMessage());
}
logger.info("successfully download attachment file");
}
// Your other methods...
}
通过添加以下行解决了：
response.setCharacterEncoding(“ISO-8859-1”)