java控制台学生管理程序

package q403; import java.io.BufferedReader; import java.io.FileReader; import java.io.FileWriter; import java.io.IOException; import java.io.InputStreamReader; import java.io.PrintWriter; public class Test { private static StuManager stm = null; private static String databaseURL = null; private static InputStreamReader instr = null; private static BufferedReader br = null; private static void init(){ try{ FileReader instream = new FileReader(databaseURL); BufferedReader in = new BufferedReader(instream); String current = null; while((current = in.readLine()) != null){ stm.input(current); } in.close(); instream.close(); } catch (IOException e) { System.out.println("打开文件失败！"); } } private static void exit(){ try{ br.close(); instr.close(); FileWriter outstream = new FileWriter(databaseURL); PrintWriter out = new PrintWriter(outstream); out.append(stm.list()); out.close(); outstream.close(); System.exit(0); } catch (IOException e) { System.out.println("保存文件失败！"); System.exit(0); } } private static void input(){ String num = null, name = null, sex = null, age = null; try{ System.out.print("输入学号："); num = br.readLine(); System.out.print("输入姓名："); name = br.readLine(); System.out.print("输入性别："); sex = br.readLine(); System.out.print("输入年龄："); age = br.readLine(); if(stm.input(num, name, sex, age)){ System.out.println("添加成功！"); }else{ System.out.println("学号已经存在！添加失败！"); } } catch (IOException e) { e.printStackTrace(); } } private static void search(){ String num = null; try{ System.out.print("输入学号："); num = br.readLine(); int index = stm.search(num); if(index == -1){ System.out.println("查无此人！"); }else{ System.out.println("此人姓名：" + stm.get(index)); } } catch (IOException e) { e.printStackTrace(); } } private static void delete(){ String num = null; try{ System.out.print("输入学号："); num = br.readLine(); if(!stm.delete(num)){ System.out.println("查无此人！"); }else{ System.out.println("成功删除！"); } } catch (IOException e) { e.printStackTrace(); } } private static void list(){ System.out.println("list："); System.out.println(stm.list()); } private static void keyListener(String key){ try{ switch(Integer.parseInt(key)){ case 0:break; case 1: search(); break; case 2: input(); break; case 3: delete(); break; case 4: list(); break; case 5: exit(); break; default: System.out.println("错误的输入！"); break; } }catch (Exception e){ System.out.println("错误的输入！"); } } public static void main( String[] args){ stm = new StuManager(); databaseURL = args[0]; init(); instr = new InputStreamReader(System.in); br = new BufferedReader(instr); while(true){ try{ System.out.println("[0]Main Menu [1]search [2]input [3]delete [4]list all [5]exit"); keyListener(br.readLine()); } catch (IOException e){} } } }