先上效果图：

直接贴代码：

public class Test {static int maxIndex = 50;    //控制输出的进度条宽度public static void main(String[] args) {begin();}private static void begin(){StringBuffer kg = new StringBuffer();for(int i=0;i<maxIndex;i++){kg.append(" ");}System.out.print("安装中:00%[>"+kg.toString()+"]");int c = 0;while (c < 101){printCurrentNum(c++);try {Thread.sleep(100);} catch (InterruptedException e) {e.printStackTrace();}}}private static void focusGoto(){for(int i=maxIndex+6;i>0;i--){System.out.print('\b');}}private static void printCurrentNum(int i) {String num = "000"+i;num = num.substring(num.length()-3);StringBuffer s = new StringBuffer(num+"%[");focusGoto();int prec = (i*100)/100;for(int index=0;index<maxIndex;index++){int c = (index*100)/maxIndex;if(c<prec){s.append("■");}else{s.append(" ");}}s.append("]");System.out.print(s.toString());}}