解決方案--java執行cmd命令ProcessBuilder--出錯Exception in thread "main" java.io.IOException: Cannot run program "dir d:\": CreateProcess error=2(xjl456852原創)

當我嘗試在java中通過ProcessBuilder運行window的cmd命令時出現錯誤:

   
   
   
           

    
    
    
            
public static void main(String [] args) throws IOException {
    
    
    
            
 ProcessBuilder builder = new ProcessBuilder();
    
    
    
            
 Process process = builder.command("dir d:\\").start();
    
    
    
            
 InputStream inputStream = process.getInputStream();
    
    
    
            
 
    
    
    
            
 BufferedReader br = new BufferedReader(new InputStreamReader(inputStream,"gb2312"));
    
    
    
            
 String line = null;
    
    
    
            
 while((line = br.readLine()) != null) {
    
    
    
            
 System.out.println(line);
    
    
    
            
 }
    
    
    
            
}
   
   
   
           

出錯如下:

Exception in thread "main" java.io.IOException: Cannot run program "dir d:\": CreateProcess error=2, 系統找不到指定的文件。

at java.lang.ProcessBuilder.start(ProcessBuilder.java:1047)

at com.xjl456852.processBuilder.ProcessBuilderTest.main(ProcessBuilderTest.java:25)

at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)

at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)

at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)

at java.lang.reflect.Method.invoke(Method.java:606)

at com.intellij.rt.execution.application.AppMain.main(AppMain.java:144)

Caused by: java.io.IOException: CreateProcess error=2, 系統找不到指定的文件。

at java.lang.ProcessImpl.create(Native Method)

at java.lang.ProcessImpl.<init>(ProcessImpl.java:385)

at java.lang.ProcessImpl.start(ProcessImpl.java:136)

at java.lang.ProcessBuilder.start(ProcessBuilder.java:1028)

... 6 more

即使我把第三行語句改為下面的,仍然出錯

   
   
   
           

    
    
    
            
Process process = builder.command("cmd.exe /c dir d:\\").start();
   
   
   
           

后來我看許多人都遇到這種情況,但是沒有人說解決方案的,有人就直接放棄了:

所以我又試了各種方式,終於解決了這個問題,這兩種方案執行都沒有問題.提供給遇到這種問題的朋友一種參考

方法一:

   
   
   
           

    
    
    
            
public static void main(String [] args) throws IOException {
    
    
    
            
 ProcessBuilder builder = new ProcessBuilder();
    
    
    
            
 List<String> list = new ArrayList<>();
    
    
    
            
 list.add("cmd.exe");
    
    
    
            
 list.add("/c");
    
    
    
            
 list.add("dir");
    
    
    
            
 list.add("d:\\");
    
    
    
            
 Process process = builder.command(list).start();
    
    
    
            
 InputStream inputStream = process.getInputStream();
    
    
    
            
 
    
    
    
            
 BufferedReader br = new BufferedReader(new InputStreamReader(inputStream,"gb2312"));
    
    
    
            
 String line = null;
    
    
    
            
 while((line = br.readLine()) != null) {
    
    
    
            
 System.out.println(line);
    
    
    
            
 }
    
    
    
            
}
   
   
   
           

方法二:

   
   
   
           

    
    
    
            
public static void main(String [] args) throws IOException {
    
    
    
            
 ProcessBuilder builder = new ProcessBuilder();
    
    
    
            
 Runtime runtime = Runtime.getRuntime();
    
    
    
            
 Process process = runtime.exec("cmd.exe /c dir d:\\");
    
    
    
            
 InputStream inputStream = process.getInputStream();
    
    
    
            
 
    
    
    
            
 BufferedReader br = new BufferedReader(new InputStreamReader(inputStream,"gb2312"));
    
    
    
            
 String line = null;
    
    
    
            
 while((line = br.readLine()) != null) {
    
    
    
            
 System.out.println(line);
    
    
    
            
 }
    
    
    
            
}