Java获取系统进程,并杀死指定进程

获取系统所有进程列表，遍历，然后进行模糊匹配，将匹配到的进程杀死！

package com.auguigu.jdk;

import java.io.BufferedInputStream;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.nio.charset.Charset;
import java.util.ArrayList;
import java.util.List;
import java.util.Locale;

public class Test {
    public static void main(String[] args) {
        SingleProcess.comfirmSingleProcess("excel");
    }
}

class SingleProcess {
//    public static Logger logger = Logger.getLogger(SingleProcess.class);

    /**
     * 确认进程,获取进程,杀死进程
     * @param prefix 进程名前缀
     */
    public static void comfirmSingleProcess(String prefix) {

        if(prefix == null) {

            throw new NullPointerException("The prefix is null,please check it!!");
        }

        // 声明文件读取流
        BufferedReader out = null;
        BufferedReader br = null;
        try {

            // 创建系统进程
            ProcessBuilder pb = new ProcessBuilder("tasklist");
            Process p = pb.start();
            // 读取进程信息
            out = new BufferedReader(new InputStreamReader(new BufferedInputStream(p.getInputStream()), Charset.forName("GB2312")));
            br = new BufferedReader(new InputStreamReader(new BufferedInputStream(p.getErrorStream())));

            // 创建集合 存放 进程+pid
            List<String> list = new ArrayList<>();
            // 读取
            String ostr;
            while ((ostr = out.readLine()) != null){
                // 将读取的进程信息存入集合
                list.add(ostr);
            }

            // 遍历所有进程
            for (int i = 3; i < list.size(); i++) {
                // 必须写死,截取长度,因为是固定的
                String process = list.get(i).substring(0, 25).trim(); // 进程名
                String pid = list.get(i).substring(25, 35).trim();    // 进程号
                // 匹配指定的进程名,若匹配到,则立即杀死
                System.out.println("--->"+process.toLowerCase(Locale.ROOT));
                if(process.toLowerCase(Locale.ROOT).startsWith(prefix)){
                    System.out.println("终止程序："+process);
                    Process exec = Runtime.getRuntime().exec("taskkill /F /PID " + pid);
                    BufferedReader out1 = new BufferedReader(new InputStreamReader(new BufferedInputStream(exec.getInputStream()), Charset.forName("GB2312")));

                    String batResult = "";
                    String line = null;
                    // 直到读完为止
                    while ((line = out1.readLine()) != null) {
                        batResult += line+"\r\n";
                    }
                    if (batResult != "") {
                        //打印信息
                        System.out.println(batResult);
                    }
                }
            }

            // 若有错误信息 即打印日志
            String estr = br.readLine();
            if (estr != null) {
                System.out.println(estr);
//                logger.error(estr);
            }
        } catch (IOException e) {
            e.printStackTrace();
        }finally {
            // 关流
            try {
                if(out != null) { out.close(); }
            } catch (IOException e) {
                e.printStackTrace();
            }

            try {
                if(br != null) { br.close(); }
            } catch (IOException e) {
                e.printStackTrace();
            }

        }
    }
}