我正在尝试将小程序转换为 Java 应用程序。因此，我生成了 JNLP 文件并传递了 POST 方法所需的所有参数。 当我从 JNLP 启动应用程序时，我收到此错误:
java.io.FileNotFoundException: http://PATH_TO_A_DIRECTORY/reopen.php
at sun.net.www.protocol.http.HttpURLConnection.getInputStream0(Unknown Source)
at sun.net.www.protocol.http.HttpURLConnection.access$200(Unknown Source)
at sun.net.www.protocol.http.HttpURLConnection$9.run(Unknown Source)
at sun.net.www.protocol.http.HttpURLConnection$9.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.AccessController.doPrivilegedWithCombiner(Unknown Source)
at sun.net.www.protocol.http.HttpURLConnection.getInputStream(Unknown Source)
at maarchcm.MaarchCM.sendHttpRequest(MaarchCM.java:368)
at maarchcm.MaarchCM.editObject(MaarchCM.java:261)
at maarchcm.MaarchCM.test(MaarchCM.java:106)
at maarchcm.MaarchCM.main(MaarchCM.java:188)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at com.sun.javaws.Launcher.executeApplication(Unknown Source)
at com.sun.javaws.Launcher.executeMainClass(Unknown Source)
at com.sun.javaws.Launcher.doLaunchApp(Unknown Source)
at com.sun.javaws.Launcher.run(Unknown Source)
at java.lang.Thread.run(Unknown Source)
异常说文件“reopen.php”丢失，但异常中提到的路径是错误的，我没有在代码中调用它。 当我将其作为小程序启动时，效果很好，但不能作为应用程序启动。 我真的不知道代码中可能存在什么错误。 这是我的代码。
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStreamWriter;
import java.net.HttpURLConnection;
import java.net.URL;
import java.util.Hashtable;
import java.util.Iterator;
import java.util.logging.Level;
import java.util.logging.Logger;
import javax.swing.JApplet;
import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.parsers.ParserConfigurationException;
import netscape.javascript.JSException;
import org.w3c.dom.Document;
import org.w3c.dom.NodeList;
import org.xml.sax.SAXException;
import netscape.javascript.JSObject;
public class MaarchCM extends JApplet {
//INIT PARAMETERS
protected String url;
protected String objectType;
protected String objectTable;
protected String objectId;
protected String userLocalDirTmp;
protected String userMaarch;
protected String userMaarchPwd;
protected String psExecMode;
protected String messageStatus;
Hashtable app = new Hashtable();
Hashtable messageResult = new Hashtable();
//XML PARAMETERS
protected String status;
protected String appPath;
protected String fileContent;
protected String fileExtension;
protected String error;
protected String endMessage;
protected String os;
protected String fileContentTosend;
public myLogger logger;
public void init() throws JSException
{
System.out.println("----------BEGIN PARAMETERS----------");
this.url = this.getParameter("url");
this.objectType = this.getParameter("objectType");
this.objectTable = this.getParameter("objectTable");
this.objectId = this.getParameter("objectId");
this.userMaarch = this.getParameter("userMaarch");
this.userMaarchPwd = this.getParameter("userMaarchPwd");
this.psExecMode = this.getParameter("psExecMode");
System.out.println("URL : " + this.url);
System.out.println("OBJECT TYPE : " + this.objectType);
System.out.println("OBJECT TABLE : " + this.objectTable);
System.out.println("OBJECT ID : " + this.objectId);
System.out.println("USER MAARCH : " + this.userMaarch);
System.out.println("PSEXEC MODE : " + this.psExecMode);
System.out.println("----------END PARAMETERS----------");
try {
this.editObject();
this.destroy();
this.stop();
System.exit(0);
} catch (Exception ex) {
Logger.getLogger(MaarchCM.class.getName()).log(Level.SEVERE, null, ex);
}
}
public void test(String[] args)
{
System.out.println("----------TESTS----------");
System.out.println("----------BEGIN PARAMETERS----------");
this.url = args[0];
this.objectType = args[1];
this.objectTable = args[2];
this.objectId = args[3];
this.userMaarch = args[4];
this.userMaarchPwd = args[5];
this.psExecMode = args[6];
System.out.println("URL : " + this.url);
System.out.println("OBJECT TYPE : " + this.objectType);
System.out.println("OBJECT TABLE : " + this.objectTable);
System.out.println("OBJECT ID : " + this.objectId);
System.out.println("USER MAARCH : " + this.userMaarch);
System.out.println("USER MAARCHPWD : " + this.userMaarchPwd);
System.out.println("PSEXEC MODE : " + this.psExecMode);
System.out.println("----------END PARAMETERS----------");
try {
this.editObject();
} catch (Exception ex) {
Logger.getLogger(MaarchCM.class.getName()).log(Level.SEVERE, null, ex);
}
}
public void parse_xml(InputStream flux_xml) throws SAXException, IOException, ParserConfigurationException
{
this.logger.log("----------BEGIN PARSE XML----------", Level.INFO);
DocumentBuilder builder = DocumentBuilderFactory.newInstance().newDocumentBuilder();
Document doc = builder.parse(flux_xml);
this.messageResult.clear();
NodeList level_one_list = doc.getChildNodes();
for (Integer i=0; i < level_one_list.getLength(); i++) {
NodeList level_two_list = level_one_list.item(i).getChildNodes();
if ("SUCCESS".equals(level_one_list.item(i).getNodeName())) {
for(Integer j=0; j < level_one_list.item(i).getChildNodes().getLength(); j++ ) {
this.messageResult.put(level_two_list.item(j).getNodeName(),level_two_list.item(j).getTextContent());
}
this.messageStatus = "SUCCESS";
} else if ("ERROR".equals(level_one_list.item(i).getNodeName()) ) {
for(Integer j=0; j < level_one_list.item(i).getChildNodes().getLength(); j++ ) {
this.messageResult.put(level_two_list.item(j).getNodeName(),level_two_list.item(j).getTextContent());
}
this.messageStatus = "ERROR";
}
}
this.logger.log("----------END PARSE XML----------", Level.INFO);
}
public void processReturn(Hashtable result) {
Iterator itValue = result.values().iterator();
Iterator itKey = result.keySet().iterator();
while(itValue.hasNext()) {
String value = (String)itValue.next();
String key = (String)itKey.next();
this.logger.log(key + " : " + value, Level.INFO);
if ("STATUS".equals(key)) {
this.status = value;
}
if ("OBJECT_TYPE".equals(key)) {
this.objectType = value;
}
if ("OBJECT_TABLE".equals(key)) {
this.objectTable = value;
}
if ("OBJECT_ID".equals(key)) {
this.objectId = value;
}
if ("APP_PATH".equals(key)) {
//this.appPath = value;
}
if ("FILE_CONTENT".equals(key)) {
this.fileContent = value;
}
if ("FILE_EXTENSION".equals(key)) {
this.fileExtension = value;
}
if ("ERROR".equals(key)) {
this.error = value;
}
if ("END_MESSAGE".equals(key)) {
this.endMessage = value;
}
}
//send message error to Maarch if necessary
if (!this.error.isEmpty()) {
this.sendJsMessage(this.error.toString());
}
}
/**
* @param args the command line arguments
*/
public static void main(String[] args) {
try{
System.out.println(args[0]);
System.out.println(args[1]);
System.out.println(args[2]);
System.out.println(args[3]);
System.out.println(args[4]);
MaarchCM maarchCM = new MaarchCM();
maarchCM.test(args);
}
catch(Exception e) {
String exMessage = e.toString();
System.out.println(exMessage);
}
}
public String editObject() throws Exception, InterruptedException, JSException {
System.out.println("----------BEGIN EDIT OBJECT----------");
System.out.println("----------BEGIN LOCAL DIR TMP IF NOT EXISTS----------");
String os = System.getProperty("os.name").toLowerCase();
boolean isUnix = os.indexOf("nix") >= 0 || os.indexOf("nux") >= 0;
boolean isWindows = os.indexOf("win") >= 0;
boolean isMac = os.indexOf("mac") >= 0;
this.userLocalDirTmp = System.getProperty("user.home");
//this.userLocalDirTmp = "C:/repertoire avec espaces";
//this.userLocalDirTmp = "c:\\maarch";
//this.userLocalDirTmp = "\\\\192.168.21.100\\Public\\montage_nas\\avec espaces";
fileManager fM = new fileManager();
fM.createUserLocalDirTmp(this.userLocalDirTmp);
if (isWindows) {
System.out.println("This is Windows");
this.userLocalDirTmp = this.userLocalDirTmp + "\\maarchTmp\\";
//this.appPath = this.userLocalDirTmp.replaceAll(" ", "%20") + "start.bat";
//this.appPath = "\""+this.userLocalDirTmp + "start.bat\"";
this.appPath = this.userLocalDirTmp + "start.bat";
this.os = "win";
} else if (isMac) {
System.out.println("This is Mac");
this.userLocalDirTmp = this.userLocalDirTmp + "/maarchTmp/";
this.appPath = this.userLocalDirTmp + "start.sh";
this.os = "mac";
} else if (isUnix) {
System.out.println("This is Unix or Linux");
this.userLocalDirTmp = this.userLocalDirTmp + "/maarchTmp/";
this.appPath = this.userLocalDirTmp + "start.sh";
this.os = "linux";
} else {
System.out.println("Your OS is not supported!!");
}
System.out.println("APP PATH: " + this.appPath);
System.out.println("----------BEGIN LOCAL DIR TMP IF NOT EXISTS----------");
fM.createUserLocalDirTmp(this.userLocalDirTmp);
System.out.println("----------END LOCAL DIR TMP IF NOT EXISTS----------");
System.out.println("Create the logger");
this.logger = new myLogger(this.userLocalDirTmp);
if (this.psExecMode.equals("OK")) {
this.logger.log("----------BEGIN PSEXEC MODE----------", Level.INFO);
boolean isPsExecExists = fM.isPsExecFileExists(this.userLocalDirTmp + "PsExec.exe");
if (!isPsExecExists) {
this.logger.log("----------BEGIN TRANSFER OF PSEXEC----------", Level.INFO);
String urlToSend = this.url + "?action=sendPsExec&objectType=" + this.objectType
+ "&objectTable=" + this.objectTable + "&objectId=" + this.objectId;
sendHttpRequest(urlToSend, "none");
this.logger.log("MESSAGE STATUS : " + this.messageStatus.toString(), Level.INFO);
this.logger.log("MESSAGE RESULT : ", Level.INFO);
this.processReturn(this.messageResult);
this.logger.log("CREATE THE FILE : " + this.userLocalDirTmp + "PsExec.exe", Level.INFO);
fM.createFile(this.fileContent, this.userLocalDirTmp + "PsExec.exe");
this.fileContent = "";
this.logger.log("----------END TRANSFER OF PSEXEC----------", Level.INFO);
}
this.logger.log("----------END PSEXEC MODE----------", Level.INFO);
}
this.logger.log("----------BEGIN OPEN REQUEST----------", Level.INFO);
String urlToSend = this.url + "?action=editObject&objectType=" + this.objectType
+ "&objectTable=" + this.objectTable + "&objectId=" + this.objectId;
sendHttpRequest(urlToSend, "none");
this.logger.log("MESSAGE STATUS : " + this.messageStatus.toString(), Level.INFO);
this.logger.log("MESSAGE RESULT : ", Level.INFO);
this.processReturn(this.messageResult);
this.logger.log("----------END OPEN REQUEST----------", Level.INFO);
String fileToEdit = "thefile." + this.fileExtension;
this.logger.log("----------BEGIN CREATE THE BAT TO LAUNCH IF NECESSARY----------", Level.INFO);
this.logger.log("create the file : " + this.appPath, Level.INFO);
fM.createBatFile(
this.appPath,
this.userLocalDirTmp,
fileToEdit,
this.os,
this.userMaarch,
this.userMaarchPwd,
this.psExecMode,
this.userLocalDirTmp
);
this.logger.log("----------END CREATE THE BAT TO LAUNCH IF NECESSARY----------", Level.INFO);
if ("ok".equals(this.status)) {
this.logger.log("RESPONSE OK", Level.INFO);
this.logger.log("----------BEGIN EXECUTION OF THE EDITOR----------", Level.INFO);
this.logger.log("CREATE FILE IN LOCAL PATH", Level.INFO);
fM.createFile(this.fileContent, this.userLocalDirTmp + fileToEdit);
//this.logger.log("CREATE FILE TO CHANGE RIGHTS IN THE TMP DIR", Level.INFO);
//fM.createRightsFile(this.userLocalDirTmp, this.userMaarch);
/*this.logger.log("LAUNCH VBS TO CHANGE RIGHTS IN THE TMP DIR", Level.INFO);
final String vbsPath = this.userLocalDirTmp + "setRights.vbs";
Process procVbs = fM.launchApp("cmd /c wscript //B " + vbsPath);
procVbs.waitFor();*/
final String exec;
this.logger.log("LAUNCH THE EDITOR !", Level.INFO);
if (isUnix) {
exec = this.appPath;
}else{
exec = "\""+this.appPath+"\"";
}
this.logger.log("EXEC PATH : " + exec, Level.INFO);
Process proc = fM.launchApp(exec);
proc.waitFor();
this.logger.log("----------END EXECUTION OF THE EDITOR----------", Level.INFO);
this.logger.log("----------BEGIN RETRIEVE CONTENT OF THE OBJECT----------", Level.INFO);
this.fileContentTosend = fM.encodeFile(this.userLocalDirTmp + "thefile." + this.fileExtension);
this.logger.log("----------END RETRIEVE CONTENT OF THE OBJECT----------", Level.INFO);
String urlToSave = this.url + "?action=saveObject&objectType=" + this.objectType
+ "&objectTable=" + this.objectTable + "&objectId=" + this.objectId;
this.logger.log("----------BEGIN SEND OF THE OBJECT----------", Level.INFO);
this.logger.log("URL TO SAVE : " + urlToSave, Level.INFO);
sendHttpRequest(urlToSave, this.fileContentTosend);
this.logger.log("MESSAGE STATUS : " + this.messageStatus.toString(), Level.INFO);
this.logger.log("LAST MESSAGE RESULT : ", Level.INFO);
this.processReturn(this.messageResult);
//send message to Maarch at the end
if (!this.endMessage.isEmpty()) {
this.sendJsMessage(this.endMessage.toString());
}
this.sendJsEnd();
this.logger.log("----------END SEND OF THE OBJECT----------", Level.INFO);
} else {
this.logger.log("RESPONSE KO", Level.WARNING);
}
this.logger.log("----------END EDIT OBJECT----------", Level.INFO);
return "ok";
}
public void sendJsMessage(String message) throws JSException
{
JSObject jso;
jso = JSObject.getWindow(this);
this.logger.log("----------JS CALL sendAppletMsg TO MAARCH----------", Level.INFO);
jso.call("sendAppletMsg", new String[] {String.valueOf(message)});
}
public void sendJsEnd() throws InterruptedException, JSException
{
JSObject jso;
jso = JSObject.getWindow(this);
this.logger.log("----------JS CALL endOfApplet TO MAARCH----------", Level.INFO);
jso.call("endOfApplet", new String[] {String.valueOf(this.objectType), this.endMessage});
}
public void sendHttpRequest(String theUrl, String postRequest) throws Exception {
URL UrlOpenRequest = new URL(theUrl);
HttpURLConnection HttpOpenRequest = (HttpURLConnection) UrlOpenRequest.openConnection();
HttpOpenRequest.setDoOutput(true);
HttpOpenRequest.setRequestMethod("POST");
if (!"none".equals(postRequest)) {
OutputStreamWriter writer = new OutputStreamWriter(HttpOpenRequest.getOutputStream());
writer.write("fileContent=" + this.fileContentTosend + "&fileExtension=" + this.fileExtension);
writer.flush();
} else {
OutputStreamWriter writer = new OutputStreamWriter(HttpOpenRequest.getOutputStream());
writer.write("foo=bar");
writer.flush();
}
int statusCode = HttpOpenRequest.getResponseCode();
System.out.println("Coooode: "+statusCode);
this.parse_xml(HttpOpenRequest.getInputStream());
HttpOpenRequest.disconnect();
}
}
最佳答案
当服务器响应为“404 Not Found”或“410 Gone”时，您将从 HttpURLConnection.getInputStream 收到 FileNotFoundException。 (任何其他问题都会给您带来不同的异常(exception)。)
那么为什么你会得到 404 或 410 呢？
404 最可能的解释是 URL 不正确。也可能是您的 HTTP 代理配置有问题，或者您正在通信的 Web 服务器本身配置错误或损坏，或者...不恰本地发送 404 响应1。
(我假设 http://PATH_TO_A_DIRECTORY/reopen.php 不是真正的 URL。)
仅当 URL 正确时才可能出现 410，但它指的是过去存在但已被删除的资源。 (IMO)您极不可能遇到这种情况。
The exception says that the file "reopen.php" is missing, but the path mentioned in the exception is wrong, and I don't call it in my code.
如果服务器发送 3xx 重定向，则异常中的 url 可能与您提供的 url 不同。因此，我怀疑问题在于服务器正在重定向到不存在的资源的 URL。这是服务器错误!
您可以通过调试或阅读源代码来确认这一点2
sun.net.www.protocol.http.HttpURLConnection
或者您可以使用网络浏览器的开发工具检查重定向行为。
1 - 一些网络开发人员通过无知、懒惰......或试图误导网络抓取工具，对网站进行编码以发送不适当的响应代码。
2 - 要查找 OpenJDK 类的源代码，请在 google 中搜索“
关于java - 如何修复 'java.io.FileNotFoundException: at sun.net.www.protocol.http.HttpURLConnection.getInputStream0 (Unknown Source)'错误？，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/56704450/