ProcessBuilder开启shell进程中乱码问题

shell子进程中默认继承当前环境的环境变量。当不需要父进程的环境变量时，使用一下代码：

public static List<String> exe(String cmds, boolean fromParentEnv) 
			throws IOException, InterruptedException {
    
    
		
		List<String> res = Lists.newArrayList();
		Process processTask=null;
		BufferedReader br = null;
		BufferedReader er = null;
		try {
    
    
			ProcessBuilder processBuilder = new ProcessBuilder("sh", "-c", cmds);
			if(!fromParentEnv) {
    
    
				Map<String, String> env = processBuilder.environment();
				env.clear();
				env.put("LANG", "en_US.UTF-8"); //must set LANG to support chinese
			}
			processTask = processBuilder.start();
			int result = processTask.waitFor();
			br = new BufferedReader(new InputStreamReader(processTask.getInputStream()));
			er = new BufferedReader(new InputStreamReader(processTask.getErrorStream()));
			String line;
			while((line = br.readLine()) != null) {
    
    
				res.add(line);
			}
			while((line = er.readLine()) != null) {
    
    
				res.add(line);
				System.err.println("Shell Script Error: " + line);
			}
			return res;
		} catch (IOException | InterruptedException e) {
    
    
			e.printStackTrace();
			return res;
		} finally {
    
    
			if(br != null) {
    
    
				br.close();
			}
			if(er != null) {
    
    
				er.close();
			}
			if(processTask != null) {
    
    
				processTask.destroy();
			}
		}
	}

上述env.clear()清除环境变量，这时子shell中出现乱码。需要手动设置环境变量：

				env.put("LANG", "en_US.UTF-8"); //must set LANG to support chinese

即可解决问题。