直接使用输出为乱码

Process proc;
        try {
            proc = Runtime.getRuntime().exec("ipconfig");
            BufferedReader in = new BufferedReader(new InputStreamReader(proc.getInputStream());
            String line = null;
            while ((line = in.readLine()) != null) {
                System.out.println(line);
            }
            in.close();
            proc.waitFor();
        } catch (IOException e) {
            e.printStackTrace();
        } catch (InterruptedException e) {
            e.printStackTrace();
        } 

改进，添加第二参数为GBK

Process proc;
        try {
            proc = Runtime.getRuntime().exec("ipconfig");
            BufferedReader in = new BufferedReader(new InputStreamReader(proc.getInputStream(),"GBK"));
            String line = null;
            while ((line = in.readLine()) != null) {
                System.out.println(line);
            }
            in.close();
            proc.waitFor();
        } catch (IOException e) {
            e.printStackTrace();
        } catch (InterruptedException e) {
            e.printStackTrace();
        }