文件操作-读入文件-写入文件
public class Title4 {public static void main(String[] args){ArrayList<String> list = bufferedReader();// 确定每个院校 有多少个学生String currentSch = "";for(int i=0;i<list.size();i++){//获取其中一个字串String temp = list.get(i);//判断是否是院校String r = "0123456789";//System.out.println("提取的是："+temp.charAt(0));if(r.indexOf(temp.charAt(0))==-1){//是院校//System.out.println("学校");currentSch = f(temp);}else{String str = currentSch+""+student(temp);bufferedWriter(str);//System.out.println(currentSch+""+student(temp));}}}//写入文件public static void bufferedWriter(String str){File f = new File("e:\\out.txt");try{if(!f.exists()){f.createNewFile();}BufferedWriter bw = new BufferedWriter(new FileWriter(f,true)); //文件写入不覆盖bw.write(str);bw.write("\n");bw.close();}catch(Exception ex){ex.printStackTrace();}}//学生字符串的组合public static String student(String str){String[] arr = str.split(":");//名字 组别 分数 号码String[] temp = {arr[3],arr[1],arr[0],arr[2]};while(temp[0].getBytes().length<12){temp[0]+= " ";}while(temp[1].getBytes().length<10){temp[1]+= " ";}while(temp[2].getBytes().length<4){temp[2]+= " ";}while(temp[3].getBytes().length<16){temp[3]+= " ";}String s = "";for(int i=0;i<temp.length;i++){s+=temp[i];}return s;}//将 拼音 转换为地名public static String f(String str){String[] arr = str.split(":");if(arr[3].equals("xijing")){arr[3] = "西京";}else if(arr[3].equals("lushan")){arr[3] = "鲁山";}else if(arr[3].equals("pingyang")){arr[3] = "平阳";}else if(arr[3].equals("danling")){arr[3] = "丹凌";}else if(arr[3].equals("xinyuan")){arr[3] = "新元";}//重新组合数组：代码 名称电话 地区String[] temp = {arr[2]+" ",arr[0],arr[1]+" ",arr[3]};String s = "";//确定院校名称的长度while(temp[1].getBytes().length<30){temp[1]+=" ";}//地区长度while(temp[3].getBytes().length<8){temp[3]+=" ";}for(int i=0;i<temp.length;i++){s+=temp[i];}return s;}//获取文档中的数据public static ArrayList<String> bufferedReader(){//这里的路径如果是相对路径的话：直接定位到工程的下一目录src/包名/文件名File f = new File("C:\\Users\\Administrator\\Desktop\\蓝桥训练真题\\2011-决赛真题\\Java高职\\4\\in.txt");ArrayList<String> list = new ArrayList<String>();try{BufferedReader br = new BufferedReader(new FileReader(f));while(br.ready()){list.add(br.readLine());}br.close();}catch(Exception ex){ex.printStackTrace();}return list;}}