基于Java的JavaEE企业级应用设计源码

import java.io.*; import java.util.LinkedList; public class File类 { public File类() { } //===============1=============== public void writer(String list) throws IOException { String[] strings = list.split(","); //在几班,从String中获取数字 String str = strings[4].trim(); String string1 = ""; if (str != null && !"".equals(str)) { for (int i = 0; i < str.length(); i++) { if (str.charAt(i) >= 48 && str.charAt(i) <= 57) { string1 += str.charAt(i); } } } int x = Integer.parseInt(string1); //学号,从String中获取数字 String string2 = strings[0].trim(); String string3 = ""; if (string2 != null && !"".equals(string2)) { for (int i = 0; i < string2.length(); i++) { if (string2.charAt(i) >= 48 && string2.charAt(i) <= 57) { string3 += string2.charAt(i); } } } int a = Integer.parseInt(string3); //目录 File file = new File("E:\\student"); File file1 = new File("E:\\student\\classNum" + x); String string = ""; String[] strings3 = file.list(); for (String s : strings3) { string += s; } //获取目录下的所有文件名称 if (string.contains("E:\\student\\classNum" + x)) { //文件.txt String str1 = "E:\\student\\classNum" + x + "\\student" + a + ".txt"; BufferedWriter bw = new BufferedWriter(new FileWriter(str1, true)); bw.write(list); bw.newLine(); bw.flush(); bw.close(); } else { //不存在file1 String str2 = "E:\\student\\classNum" + x; File file2 = new File(str2); //创建新班级 file2.mkdir(); String str1 = str2 + "\\student" + a + ".txt"; BufferedWriter bw = new BufferedWriter(new FileWriter(str1, true)); bw.write(list); bw.newLine(); bw.flush(); bw.close(); } } //===============2=============== public void delStudent(int stuNum) throws IOException { String s1 = "stuNum=" + stuNum; String s2 = getAll(); String[] strings1 = s2.split("\n"); //从全部信息中获得哪一个是学号是stuNum的学生信息 int x = 0; for (int i = 0; i < strings1.length; i++) { if (strings1[i].contains(s1)) { x = i; break; } } //获得班号 String[] strings = strings1[x].split(","); try { String string2 = strings[4].trim(); String string3 = ""; if (string2 != null && !"".equals(string2)) { for (int i = 0; i < string2.length(); i++) { if (string2.charAt(i) >= 48 && string2.charAt(i) <= 57) { string3 += string2.charAt(i); } } } //班号 int a = Integer.parseInt(string3); String s3 = "E:\\student\\classNum" + a + "\\student" + stuNum + ".txt"; File file = new File(s3); //判断是否删除成功 if (file.delete()) { System.out.println("删除成功"); } else if (!file.exists()) { System.out.println("删除失败,该学生不存在"); } } catch (ArrayIndexOutOfBoundsException e) { } } //获取全部学生信息,并返回学生信息的字符串; public String getAll() throws IOException { String s1 = ""; String s3 = ""; String s5 = ""; LinkedList<String> lii = new LinkedList<>(); File file = new File("E:\\student"); File[] files = file.listFiles(); for (File F : files) { s1 += F.getAbsolutePath(); } String[] strings = s1.split("E"); for (int i = 1; i < strings.length; i++) { String s2 = "E" + strings[i]; File file1 = new File(s2); File[] files1 = file1.listFiles(); for (File F : files1) { s3 += F.getAbsolutePath(); } } String[] strings1 = s3.split("E"); for (int i = 1; i < strings1.length; i++) { String s4 = "E" + strings1[i]; File file1 = new File(s4); BufferedReader br = new BufferedReader(new FileReader(file1)); lii.add(br.readLine()); br.close(); } for (int i = 0; i < lii.size(); i++) { s5 += lii.get(i) + "\n"; } return s5; } //===============3=============== public void age加() throws IOException { String[] strings = getAll().split("\n"); for (int i = 0; i < strings.length; i++) { String[] strings1 = strings[i].split(","); //stuNum是几 String string2 = strings1[0].trim(); String string3 = ""; if (string2 != null && !"".equals(string2)) { for (int j = 0; j < string2.length(); j++) { if (string2.charAt(j) >= 48 && string2.charAt(j) <= 57) { string3 += string2.charAt(j); } } } //学号 int a = Integer.parseInt(string3); //classNum是几 String string4 = strings1[4].trim(); String string5 = ""; if (string4 != null && !"".equals(string4)) { for (int k = 0; k < string4.length(); k++) { if (string4.charAt(k) >= 48 && string4.charAt(k) <= 57) { string5 += string4.charAt(k); } } } //班号 int b = Integer.parseInt(string5); //age是几 String string6 = strings1[3].trim(); String string7 = ""; if (string6 != null && !"".equals(string6)) { for (int l = 0; l < string6.length(); l++) { if (string6.charAt(l) >= 48 && string6.charAt(l) <= 57) { string7 += string6.charAt(l); } } } //年龄 int c = Integer.parseInt(string7) + 1; String s = "E:\\student\\classNum" + b + "\\student" + a + ".txt"; File file1 = new File(s); file1.delete(); File file = new File(s); String s1 = strings1[0] + "," + strings1[1] + "," + strings1[2] + ", " + "age=" + c + "," + strings1[4]; try { BufferedWriter bw = new BufferedWriter(new FileWriter(file)); bw.write(s1); bw.close(); } catch (FileNotFoundException e) { } } System.out.println("操作成功"); } //===============4=============== public void shift(int stuNum, int classNum, String classNum1) throws IOException { //转移前的路径 String s1 = "E:\\student\\classNum" + classNum + "\\student" + stuNum + ".txt"; File file1 = new File(s1); //转移后的路径 String s2 = "E:\\student\\classNum" + classNum1 + "\\student" + stuNum + ".txt"; File file = new File(s2); try { BufferedReader br = new BufferedReader(new FileReader(s1)); BufferedWriter bw = new BufferedWriter(new FileWriter(s2)); String line; while ((line = br.readLine()) != null) { String[] strings = line.split(","); String s3 = "classNum=" + classNum1 + "}"; String s4 = strings[0] + "," + strings[1] + "," + strings[2] + "," + strings[3] + ", " + s3; bw.