[已解决]Java如何反序列出（读取文本中所有内容）

LongerSking · 发表于 2022-9-26 15:16:36

主类
import java.io.*;
import java.nio.charset.StandardCharsets;
import java.util.ArrayList;
import java.util.Random;
import java.util.Scanner;
public class StudentSystem implements Serializable{
static ArrayList<User> Ulist = new ArrayList<>();
static ArrayList<Student> Slist = new ArrayList<>();
static User user = new User();
static Student student = new Student();
static String path1,path2;
static {
path2 = "studentsystem\\student.txt";
path1 = "studentsystem\\user.txt";
}
// static File file1 = new File(path1),file2 = new File(path2);
// static {
// if (!file1.exists()) {
// try {
// file1.createNewFile();
// } catch (IOException e) {
// e.printStackTrace();
// }
// if (!file1.exists()) {
// try {
// file1.createNewFile();
// } catch (IOException e) {
// e.printStackTrace();
// }
// }
// }
// }
public static void main(String[] args) throws Exception {
readFile(Ulist,null,path1,user,null);
enterUserSystem(Ulist);
}
private static void enterUserSystem(ArrayList<User> list) throws Exception{
User user = new User();
System.out.println("---------------欢迎来到Java版学生管理系统---------------");
while (true){
System.out.println("--------请选择1.登录 2.注册 3.忘记密码--------");
Scanner sc = new Scanner(System.in);
String choice = sc.next();
switch (choice) {
case "1":
logIn(Ulist);
break;
case "2":
register(Ulist);
writeFile(Ulist,path1);
break;
case "3":
forgotPassword(Ulist);
break;
case "4":
System.out.println("---------------退出用户界面---------------");
System.exit(0);
default:
System.out.println("选项不存在！默认退出");
System.exit(0);
}
}
}
private static void enterStudentSystem() throws Exception {
loop: while(true){
System.out.println("添加学生信息，请按1");
System.out.println("删除学生信息，请按2");
System.out.println("修改学生信息，请按3");
System.out.println("查询学生信息，请按4");
System.out.println("退出，请按5");
System.out.print("请输入您的选择：");
Scanner sc = new Scanner(System.in);
String choice = sc.next();
switch (choice) {
case "1":
readFile(null,Slist,path2,null,student);
addStudent(Slist);
writeFile(Slist,path2);
break;
case "2":
readFile(null,Slist,path2,null,student);
deleteStudent(Slist);
break ;
case "3":
readFile(null,Slist,path2,null,student);
changeStudent(Slist);
writeFile(Slist,path2);
break ;
case "4":
readFile(null,Slist,path2,null,student);
queryStudent(Slist);
break ;
case "5":
System.out.println("---------------退出学生管理系统---------------");
break loop;
default:
System.out.println("选项不存在！请重新输入");
}
}
}
private static void register(ArrayList<User> list) throws IOException {
String s1,s2,s3,s4;
s1 = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXVZ";
s3 = "0123456789xX";
s2 = "0123456789";
s4 = "~`!@#$%^&*()_+-={}[]|\\;:'"<>,.?/";
User user = new User();
Scanner sc = new Scanner(System.in);
String userName,password,repassword,personId,phoneNum;
boolean flag1 = true,flag2 = true,flag3 = true,flag4 = true;
while(flag3) {
System.out.print("请输入用户名（长度必须在3到15位）:");
userName = sc.next();
int l = userName.length();
if(l < 3||l > 15){
System.out.println("输入用户名语法错误，请重新输入");
}
if(userContain(list,userName)) {
System.out.println("用户名已被注册，请再输入其他用户名！");
continue;
}else{
System.out.println("注册用户名成功");
user.setUserName(userName);
flag3 = false;
}
}
while(flag4){
System.out.print("请设置密码（长度必须在8到15位）:");
password = sc.next();
int l = password.length();
if(l < 8||l > 15){
System.out.println("设置密码语法错误，请重新输入");
}else {
System.out.print("密码设置成功，请再次输入核对：");
while (flag4){
repassword = sc.next();
if(password.equals(repassword)){
System.out.println("密码核对成功，已录入");
repassword = null;
user.setPassword(password);
flag4 = false;
}else {
System.out.println("密码核对错误，请再次核对");
}
}
}
}
while (flag2){
System.out.println("请输入身份证号码：");
personId = sc.next();
String id = personId;
if((id.charAt(0)=='0')||(id.length()!=18)){
flag2 = true;
}else if (isContain(id.substring(0,17).toString(),s1)){
flag2 = true;
}else if(!(isContain(id.substring(17),s3))){
flag2 = true;
}else {
flag2 = false;
}
if(flag2 == false){
user.setPersonId(id);
}else {
System.out.println("输入错误，请重新输入：");
}
}
while (flag1 ){
System.out.println("请输入手机号码：");
phoneNum = sc.next();
if((isContain(phoneNum,s1))||(isContain(phoneNum,s4))){
flag1 = true;
}else if((phoneNum.length() != 11)||phoneNum.charAt(0) == '0'){
flag1 = true;
}else {
flag1 = false;
}
if(flag1 == true){
System.out.println("输入格式错误！请重新输入：");
}else {
System.out.println("输入成功");
user.setPhoneNum(phoneNum);
}
}
if((flag2 == flag3 == flag1 == flag4)&&(flag2 == false)){
System.out.println("注册成功");
list.add(user);
}else {
System.out.println("注册失败");
}
}
private static void logIn(ArrayList<User> list) throws Exception {
Scanner sc = new Scanner(System.in);
System.out.print("请输入用户名：");
String name = sc.next();
while (true){
if(userContain(list,name)){
break ;
}else {
System.out.println("未找到该用户，请先注册");
return;
}
}
System.out.print("请输入密码：");
String key = sc.next();
while (true){
String code = getCode();
System.out.println("验证码：" + code);
System.out.print("请输入验证码：");
String recode = sc.next();
if(code.equalsIgnoreCase(recode)){
System.out.println("验证码正确");
break;
}else{
System.out.println("验证码输入错误，请重新输入");
}
}
User user = new User(name,key,null,null);
if(isRight(list,user)){
System.out.println("登录成功，正在进入学生管理系统");
enterStudentSystem();
}else{
System.out.println("登录失败，账户名或密码输入错误");
}
}
private static void forgotPassword(ArrayList<User> list){
Scanner sc = new Scanner(System.in);
System.out.print("请输入用户名：");
String name = sc.next();
while (true){
if(userContain(list,name)){
break ;
}else {
System.out.println(userContain(list, name));
System.out.println("未找到该用户，请先注册");
return;
}
}
int index = userByName(list,name);
User user = new User();
user = list.get(index);
String pI, pN, key, rekey;
while (true){
System.out.print("请输入身份证号码：");
pI = sc.next();
System.out.print("请输入电话号码：");
pN = sc.next();
if (!(user.getPersonId().equalsIgnoreCase(pI) && user.getPhoneNum().equals(pN))) {
System.out.println("身份证或电话号码输入错误！！！");
continue;
}else {
break;
}
}
clock: while(true){
System.out.print("请设置密码（长度必须在8到15位）:");
key = sc.next();
int l = key.length();
if(l < 8||l > 15){
System.out.println("设置密码语法错误，请重新输入");
}else {
System.out.print("密码设置成功，请再次输入核对：");
while (true){
rekey = sc.next();
if(key.equals(rekey)){
System.out.println("密码核对成功，已录入");
rekey = null;
break clock;
}else {
System.out.println("密码核对错误，请再次核对");
continue ;
}
}
}
}
user.setPassword(key);
}
private static int userByName(ArrayList<User> list,String name) {
for (int i = 0; i < list.size(); i++) {
User user = new User();
user = list.get(i);
if(user.getUserName().equals(name)){
return i;
}
}
return -1;
}
public static void addStudent(ArrayList<Student> list) throws IOException {
Student stu = new Student();
Scanner sc = new Scanner(System.in);
String id = null;
while (true) {
System.out.print("请输入学号：");
id = sc.next();
boolean key = idOnly(list, id);
if(key){
System.out.println("您添加的学号已存在，请重新输入！！！");
}else{
stu.setId(id);
list.add(stu);
break;
}
}
System.out.print("请输入姓名：");
String name = sc.next();
System.out.print("请输入籍贯：");
String address = sc.next();
System.out.print("请输入年龄：");
int age = sc.nextInt();
stu = new Student(name,id,address,age);
list.add(stu);
System.out.println("学生信息添加成功！");
}
public static void deleteStudent(ArrayList<Student> list){
Scanner sc = new Scanner(System.in);
System.out.print("请输入您的学号来删除对应信息：");
String id = sc.next();
int bool = getIndex(list,id);
if(bool >= 0){
list.remove(bool);
System.out.println("删除成功");
}else{
System.out.println("很抱歉，未能找到您的学号!");
}
}
public static void changeStudent(ArrayList<Student> list){
System.out.print("请输入您的学号以便于修改您对应的信息:");
Scanner sc = new Scanner(System.in);
String id = null;
while (true) {
id = sc.next();
boolean flag = idOnly(list, id);
if(flag){
break;
}else{
System.out.println("您输入的学号不存在！请重新输入！");
}
}
int index = getIndex(list,id);
First: while(true) {
System.out.println("修改学号请按1\n修改姓名请按2\n修改年龄请按3\n修改籍贯请按4\n其余均为放弃修改\n");
System.out.print("请按照提示输入：");
String choice = sc.next();
switch (choice) {
case "1":
System.out.print("请输入您想修改学号为：");
list.get(index).setId(sc.next());
break;
case "2":
System.out.print("请输入您想修改姓名为：");
list.get(index).setName(sc.next());
break;
case "3":
System.out.print("请输入您想修改年龄为：");
list.get(index).setAge(sc.nextInt());
break;
case "4":
System.out.print("请输入您想修改籍贯为：");
list.get(index).setAddress(sc.next());
break;
default:
System.out.println("退出");
}
Second:while(true) {
System.out.println("是否继续修改？(yes/no)");
String chance = sc.next();
if (chance.equalsIgnoreCase("no")) {
break First;
} else if (chance.equalsIgnoreCase("yes")) {
System.out.println("继续修改");
break Second;
} else {
System.out.println("输入错误请重新选择：");
}
}
}
}
public static void queryStudent(ArrayList<Student> list){
if(list.size() == 0){
System.out.println("没有学生信息，请添加后再查询");
return;
}
System.out.println("学号\t\t\t" + "姓名\t" + "年龄\t" + "籍贯");
for (int i = 0; i < list.size(); i++) {
Student stu = new Student();
stu = list.get(i);
System.out.println(stu.getId()+"\t"+stu.getName()+"\t"+stu.getAge()+"\t"+stu.getAddress());
}
}
public static boolean idOnly(ArrayList<Student> list,String id) {
int flag = getIndex(list,id);
if(flag >= 0){
return true;
}
return false;
}
public static int getIndex(ArrayList<Student> list,String id){
for (int i = 0; i < list.size(); i++) {
String sid = list.get(i).getId();
if (sid.equals(id)) {
return i;
}
}
return -1;
}
public static boolean isContain(String s1,String s2){
for (int i = 0; i < s1.length(); i++) {
char c1 = s1.charAt(i);
for (int k = 0; k < s2.length(); k++) {
char c2 = s2.charAt(k);
if(c2 == c1){
return true;
}
}
}
return false;
}
public static boolean userContain(ArrayList<User> list,String name){
for (int l = 0; l < list.size(); l++) {
User user = new User();
user = list.get(l);
String rightName = user.getUserName();
if (rightName.equals(name)){
return true;
}
}
return false;
}
private static boolean isRight(ArrayList<User> list,User user) {
String n = user.getUserName();
String p = user.getPassword();
for (int i = 0; i < list.size(); i++) {
User reuser = new User();
reuser = list.get(i);
if((reuser.getPassword().equals(p))&&(reuser.getUserName().equals(n))){
return true;
}
}
return false;
}
public static String getCode(){
ArrayList<Character> clist = new ArrayList<>();
for (int i = 0; i < 26; i++) {
clist.add((char)('a'+i)) ;
clist.add((char)('A'+i)) ;
}
StringBuilder sb = new StringBuilder();
Random random = new Random();
for (int l = 0; l < 4; l++) {
int index = random.nextInt(clist.size());
char c = clist.get(index);
sb.append(c);
}
int num = random.nextInt(10);
sb.append(num);
char[] chars = sb.toString().toCharArray();
for (int i = 0; i < chars.length; i++) {
int n = random.nextInt(chars.length);
char temp = chars[n];
chars[n] = chars[chars.length-1];
chars[chars.length-1] = temp;
}
return new String(chars);
}
public static void writeFile(ArrayList<?> list,String path) throws Exception{
int length = list.size();
ObjectOutputStream oos = null;
OutputStream ops = null;
for (int i = 0; i < length; i++) {
ops = new FileOutputStream(path,true);
oos = new ObjectOutputStream(ops);
oos.writeObject(list.get(i));
oos.writeObject('\n');
}
oos.flush();
oos.close();
ops.close();
}
public static void readFile(ArrayList<User> list1,ArrayList<Student> list2,String path,User user,Student student) throws Exception {
InputStream inputStream;
ObjectInputStream ois = null;
//String str;
try {
if(student == null) {
inputStream = new FileInputStream(path);
/* int len;
byte[] b = new byte[1024];
while((len = inputStream.read(b)) != -1){
str = new String(b,0,len);
}*/
ois = new ObjectInputStream(inputStream);
user = (User) ois.readObject();
list1.add(user);
}
} catch (Exception e) {
e.printStackTrace();
/* System.out.println("没有任何数据，请先添加用户数据");
System.out.println("是否选择注册账户？（yes/no）");
String choice;
Scanner scanner = new Scanner(System.in);
choice = scanner.next();
if (choice.equalsIgnoreCase("yes")){
register(Ulist);
writeFile(Ulist,path1);
}else {
System.out.println("默认退出");
System.exit(0);
}*/
}
try {
if(user == null){
inputStream = new FileInputStream(path);
ois = new ObjectInputStream(inputStream);
student= (Student) ois.readObject();
list2.add(student);
}
} catch (Exception e) {
e.printStackTrace();
/* System.out.println("没有任何数据，请先添加学生数据");
System.out.println("是否选择添加学生信息？（yes/no）");
String choice;
Scanner scanner = new Scanner(System.in);
choice = scanner.next();
if (choice.equalsIgnoreCase("yes")){
addStudent(Slist);
writeFile(Ulist,path1);
}else {
System.out.println("默认退出");
System.exit(0);
}*/
}
}
}

复制代码

用户类
import java.io.Serializable;
public class User implements Serializable {
public String userName;
private String password;
private String personId;
private String phoneNum;
public User() {
}
public User(String userName, String password, String personId, String phoneNum) {
this.userName = userName;
this.password = password;
this.personId = personId;
this.phoneNum = phoneNum;
}
public String getUserName() {
return userName;
}
public void setUserName(String userName) {
this.userName = userName;
}
public String getPassword() {
return password;
}
public void setPassword(String password) {
this.password = password;
}
public String getPersonId() {
return personId;
}
public void setPersonId(String personId) {
this.personId = personId;
}
public String getPhoneNum() {
return phoneNum;
}
public void setPhoneNum(String phoneNum) {
this.phoneNum = phoneNum;
}
}

复制代码

学生类
import java.io.Serializable;
public class Student implements Serializable {
private String name;
private String id;
private String address;
private int age;
public Student(String name, String id, String address, int age) {
this.name = name;
this.id = id;
this.address = address;
this.age = age;
}
public Student() {
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public String getId() {
return id;
}
public void setId(String id) {
this.id = id;
}
public String getAddress() {
return address;
}
public void setAddress(String address) {
this.address = address;
}
public int getAge() {
return age;
}
public void setAge(int age) {
this.age = age;
}
}

复制代码

这代码文件路径我稍微改了一下

最佳答案

月排行榜 / 总排行榜

q1577271837

2022-9-26 15:16:37

import java.io.BufferedReader;
import java.io.FileNotFoundException;
import java.io.FileReader;
import java.io.IOException;
public class Temp {
public static void main(String[] args) {
try {
BufferedReader bufferedReader = new BufferedReader(new FileReader("填写你的文本路径"));
while(bufferedReader.readLine() != null){
System.out.println(bufferedReader.readLine());
}
} catch (FileNotFoundException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
}
}

复制代码

跳转到最佳答案楼层

q1577271837 · 发表于 2022-9-26 15:16:37

这个最佳答案由 q1577271837 给出，感谢 q1577271837 的回答。

单击隐藏图章

import java.io.BufferedReader;
import java.io.FileNotFoundException;
import java.io.FileReader;
import java.io.IOException;
public class Temp {
public static void main(String[] args) {
try {
BufferedReader bufferedReader = new BufferedReader(new FileReader("填写你的文本路径"));
while(bufferedReader.readLine() != null){
System.out.println(bufferedReader.readLine());
}
} catch (FileNotFoundException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
}
}

复制代码

LongerSking · 发表于 2022-9-26 15:17:31

等一下不知道为毛自动翻译了

账号		自动登录	找回密码
密码			立即注册