我正在使用java Process执行CSharp程序,方法是创建.exe文件,但该文件的进程没有响应0 exitCode
。错误是空的。在Visual Studio中运行正常但是使用java,它会创建问题。没有输出也没有错误,我被困在这请求帮助。我使用的是Java 7。
我正在使用Csc (inbuild compiler in .Net framework for windows)
它给了我dll
引用错误。命令正在关注
csc /nologo /r:D:/simulatorConfig/ArrayConversion.dll /out:D:\\apache-tomcat-7.0.64\\temp\\tmp749792186557790590.exe D:\\apache-tomcat-7.0.64\\temp\\tmp749792186557790590.cs
stream = new BufferedReader(new InputStreamReader(proc.getErrorStream()));
上面是Error,它是空的String。
代码在这里请看一下。
public File compile(File sourceFile, LANGUAGE lang) throws InterruptedException, IOException, CompilerException, ConfigurationException {
String absolutePath = sourceFile.getCanonicalPath();
// System.out.println("absolutePath : " + absolutePath);
String destFile;
if (OsUtils.isWindows()) {
destFile = absolutePath.replace(lang.getFileExtension(), EXECUTABLE_FILE_SUFFIX);
} else {
destFile = absolutePath.replace(lang.getFileExtension(), "");
}
String compileCommand = generateCommand(absolutePath, destFile, lang);
logger.error("compileCommand : " + compileCommand);
// Compiles and create exe file for execution
Process proc = Runtime.getRuntime().exec(compileCommand);
// Wait for process to complete
int returnValue = proc.waitFor();
if (returnValue != 0) {
String errorMsg = getCompilerMessage(sourceFile, proc, lang);
throw new CompilerException(errorMsg);
}
proc.destroy();
return new File(destFile);
}
private String getCompilerMessage(File sourceFile, Process proc, LANGUAGE lang) throws IOException {
StringBuilder message = new StringBuilder();
BufferedReader stream = null;
String line = null;
switch (lang) {
case C:
case CPP:
// GNU C/CPP compiler prints compiler errors in standard errors
// tream
stream = new BufferedReader(new InputStreamReader(proc.getErrorStream()));
break;
case CSHARP:
// CSharp compiler prints compiler errors in standard output stream
stream = new BufferedReader(new InputStreamReader(proc.getErrorStream()));
break;
}
while ((line = stream.readLine()) != null) {
logger.error(line);
line = line.substring(line.indexOf(sourceFile.getName()) + (int) sourceFile.getName().length());
if (message.toString().isEmpty()) {
message.append(lang == LANGUAGE.CSHARP ? "Line" : "").append(line);
} else {
message.append("<br/>Line").append(line);
}
// message.append(line).append(SystemUtils.LINE_SEPARATOR);
}
stream.close();
return message.toString();
}
private String generateCommand(String sourceFile, String destFile, LANGUAGE lang) throws ConfigurationException {
// System.out.println("sourceFile : " + sourceFile + " -- destFile : " +
// destFile);
Configuration config = new PropertiesConfiguration("system.properties");
String cmd = "";
switch (lang) {
case C:
case CPP:
sourceFile = sourceFile.replace("\\", "\\\\");
destFile = destFile.replace("\\", "\\\\");
cmd = "g++ " + sourceFile + " -o " + destFile + " " + config.getString("C_CPP_HEADERFILE").trim();
break;
case CSHARP:
sourceFile = sourceFile.replace("\\", "\\\\");
destFile = destFile.replace("\\", "\\\\");
logger.error("Config Path : "+config.getString("MONO_PATH"));
if (OsUtils.isWindows()) {
cmd = "csc /nologo /r:" + config.getString("CS_HEADERFILE_WIN") + " /out:" + destFile + " " + sourceFile;
} else {
cmd = "/opt/mono/bin/mcs /reference:" + config.getString("CS_HEADERFILE") + " /out:" + destFile + " "
+ sourceFile;
}
break;
}
logger.info("Command :" + cmd);
return cmd;
}
答案 0 :(得分:0)
使用Runtime#exec
启动命令时,必须在每种情况下消耗错误和std流(不仅在返回代码为!= 0时),否则内部缓冲区可能/将会满/ subprocess将无限期地等待,直到有人消耗它们。
这个问题的一个常见症状是一个永不返回的过程,使整个过程似乎陷入僵局。
有几种方法可以解决这个问题,其中一种方法最简单:https://docs.oracle.com/javase/7/docs/api/java/lang/ProcessBuilder.html#redirect-input。
此外,这里似乎存在一个问题:
// CSharp compiler prints compiler errors in standard output stream
stream = new BufferedReader(new InputStreamReader(proc.getErrorStream()));
break;
在注释中,您告诉编译器在stdout上输出错误,但您正在使用错误流。