[英]Getting Cmd Output in Java
嘗試將cmd輸出重定向到Java var時遇到問題。
我的資料來源:
System.out.println("Init WAR packaging");
ProcessBuilder builder = new ProcessBuilder(Arrays.asList(new String[] {"cmd.exe", "/C", "start", "/wait", "new.bat"}));
Process process = builder.start();
BufferedReader reader = new BufferedReader(new InputStreamReader(process.getInputStream()));
StringBuilder strBuilder = new StringBuilder();
String line = null;
while (process.isAlive()) {
if((line = reader.readLine()) != null) {
strBuilder.append(line);
strBuilder.append(System.getProperty("line.separator"));
} else {
System.out.println("123");
Thread.sleep(10);
}
}
String result = strBuilder.toString();
System.out.println(result);
System.out.println("Start WAR packaging");
該批次主要包含:
jar -cvf test.war *.jsp *.xml
我在控制台中得到的輸出:
Init WAR packaging
123
Start WAR packaging
所以我從CMD輸出的所有內容都為空,實際CMD輸出看起來像:
asdf.jsp wird hinzugefügt(ein = 17270) (aus = 4693)(72 % verkleinert)
qwer.jsp wird hinzugefügt(ein = 12969) (aus = 3519)(72 % verkleinert)
yxcv.jsp wird hinzugefügt(ein = 22463) (aus = 5375)(76 % verkleinert)
rewq.jsp wird hinzugefügt(ein = 30687) (aus = 6748)(78 % verkleinert)
jhgf.jsp wird hinzugefügt(ein = 47974) (aus = 11005)(77 % verkleinert)
我認為這實際上就是樣子。
真的很感謝任何形式的幫助,因為我無法與google /其他stackoverflow問題中找到的信息相處。
謝謝你,祝你有美好的一天 :)
編輯:
我按照arataj的建議修改了整個代碼(希望我對了):
ProcessBuilder builder = new ProcessBuilder(Arrays.asList(new String[] {"cmd.exe", "/C", "start", "/wait", "new.bat"}));
Process process = builder.start();
BufferedReader reader = new BufferedReader(new InputStreamReader(process.getInputStream()));
StringBuilder strBuilder = new StringBuilder();
String line = null;
while (process.isAlive()) {
Thread.sleep(10);
line = reader.readLine();
strBuilder.append(line);
strBuilder.append(System.getProperty("line.separator"));
}
line = reader.readLine();
strBuilder.append(line);
String result = strBuilder.toString();
System.out.println(result);
控制台輸出:
Init WAR packaging
null
null
Start WAR packaging
解決了問題,問題在於我無法訪問我想要的輸出,因為這是由調用另一個命令的命令引起的。
我用代碼解決的方式:
ProcessBuilder builder = new ProcessBuilder("cmd.exe");
Process process = builder.start();
BufferedWriter out = new BufferedWriter(new
OutputStreamWriter(process.getOutputStream()));
InputStream stdout = process.getInputStream();
BufferedReader reader = new BufferedReader(new InputStreamReader(stdout));
out.write("start /b new.bat\n");
out.flush();
out.close();
Scanner scanner = new Scanner(stdout);
while (scanner.hasNextLine()) {
System.out.println(scanner.nextLine());
}
System.out.println("end");
scanner.close();
Awnser基於此 。
謝謝您的幫助!
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