对象持久化 | 易学教程

package com.ghgj.Buffer;

import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.ObjectInputStream;
import java.io.ObjectOutputStream;
import java.util.ArrayList;
import java.util.List;

1.定义学生类,包含姓名(String name),性别(String gender),
```
    年龄(int age)三个属性,生成空参有参构造,set和get方法,toString方法
```
2.键盘录入6个学员信息(录入格式:张三,男,25),
要求有两个相同的信息,将6个学员信息存入到ArrayList集合中
3.将存有6个学员信息的ArrayList集合对象写入到D:\StudentInfo.txt文件中
4.读取D:\StudentInfo.txt文件中的ArrayList对象并遍历打印
5.对ArrayList集合中的6个学生对象进行去重
*/
public class Test02 {
public static void main(String[] args) throws Exception {
List list=new ArrayList<>();
Student student=new Student(“张三”,“男”,22);
Student student2=new Student(“张三”,“男”,22);
Student student3=new Student(“李四”,“男”,32);
Student student4=new Student(“小花妖”,“女”,12);
Student student5=new Student(“小花袄”,“女”,23);
Student student6=new Student(“王五”,“男”,25);
list.add(student);
list.add(student2);
list.add(student3);
list.add(student4);
list.add(student5);
list.add(student6);
ObjectOutputStream oos=new ObjectOutputStream(new FileOutputStream(“student.txt”));
oos.writeObject(list);
oos.flush();
oos.close();
```
 ObjectInputStream ois=new ObjectInputStream(new FileInputStream("student.txt"));
 List<Student> list2=(List<Student>) ois.readObject();
 List<Student> list3=new ArrayList<>();
 for (Student stu: list2) {
 	System.out.println(stu);
 	
 for (Student stu2: list2) {
 	     boolean isContain=false;
 	for (Student stu3: list3) {
 		if (stu2.getName().equals(stu3.getName())&&stu2.getAge()==stu3.getAge()&&stu2.getGender().equals(stu3.getGender())) {
 			isContain=true;
 		}
 	}if(!isContain) {
 		list3.add(stu2);
 	}
 	/*
 	 * 用两个list去重
 	 * 遍历两个集合，给他们设一个中间变量来记录是否有重复值
 	 * 如果中间变量是false则说明没有重复值就可以把原来的list添加到新的集合里面去
 	 */
 }
 }
 System.out.println("==========取到不重复的值是==============");
 System.out.println(list3);
```
}

}

来源：https://blog.csdn.net/weixin_45014243/article/details/102759106

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