<dependency>			<groupId>cn.hutool</groupId>			<artifactId>hutool-core</artifactId>			<version>5.6.5</version>		</dependency>

		File dest = new File("C:UsersAdministratorDesktopxuzhu/writeTest1.txt") ;		OutputStream outputStream = null;		try {			outputStream = new FileOutputStream(dest);			boolean isCloseOut = false;			String str = "1hello 小虚竹2hello 小虚竹";			byte[] sb = str.getBytes();			//覆盖，不是追加			IoUtil.write(outputStream,isCloseOut,sb);		}catch (IOException e) {			//抛出一个运行时异常(直接停止掉程序)			throw new RuntimeException("运行时异常",e);		} finally {			IoUtil.close(outputStream);		}

	File dest = new File("C:UsersAdministratorDesktopxuzhu/writeTest2.txt") ;		OutputStream outputStream = null;		try {			outputStream = new FileOutputStream(dest);			boolean isCloseOut = false;			String str = "1hello 小虚竹2hello 小虚竹";			//覆盖，不是追加			IoUtil.writeUtf8(outputStream,isCloseOut,str);		}catch (IOException e) {			//抛出一个运行时异常(直接停止掉程序)			throw new RuntimeException("运行时异常",e);		} finally {			IoUtil.close(outputStream);		}

		File dest = new File("C:UsersAdministratorDesktopxuzhu/writeTest3.txt") ;		OutputStream outputStream = null;		try {			outputStream = new FileOutputStream(dest);			boolean isCloseOut = false;			String str = "1hello 小虚竹2hello 小虚竹";			//覆盖，不是追加			IoUtil.write(outputStream,CharsetUtil.UTF_8,isCloseOut,str,str,str);		}catch (IOException e) {			//抛出一个运行时异常(直接停止掉程序)			throw new RuntimeException("运行时异常",e);		} finally {			IoUtil.close(outputStream);		}

public class StudentDto implements Serializable {	private static final long serialVersionUID = -3259523582894021714L;	private String name;	private Integer age;	private String sNo;	public String getName() {		return name;	}	public void setName(String name) {		this.name = name;	}	public Integer getAge() {		return age;	}	public void setAge(Integer age) {		this.age = age;	}	public String getsNo() {		return sNo;	}	public void setsNo(String sNo) {		this.sNo = sNo;	}	@Override	public String toString() {		return "StudentDto{" +				"name="" + name + """ +				", age=" + age +				", sNo="" + sNo + """ +				"}";	}}-------------------------------------------		try {			boolean isCloseOut = false;			StudentDto student = new StudentDto();			student.setName("小虚竹");			student.setAge(18);			student.setsNo("nb9527");			final FastByteArrayOutputStream byteOut = new FastByteArrayOutputStream();			IoUtil.writeObj(byteOut,isCloseOut,student);			byte[] bytes = byteOut.toByteArray();			ByteArrayInputStream byteArrayInputStream = new ByteArrayInputStream(bytes);			//从流中读取对象，即对象的反序列化			StudentDto studentDto = IoUtil.readObj(byteArrayInputStream);			System.out.println(studentDto.toString());		}catch (Exception e) {			//抛出一个运行时异常(直接停止掉程序)			throw new RuntimeException("运行时异常",e);		} finally {		}

		File dest = new File("C:UsersAdministratorDesktopxuzhu/writeTest6.txt") ;		OutputStream outputStream = null;		ObjectInputStream inputStream = null;		FileInputStream fis = null;		try {			boolean isCloseOut = false;			StudentDto student = new StudentDto();			student.setName("小虚竹");			student.setAge(18);			student.setsNo("nb9527");			StudentDto student1 = new StudentDto();			student1.setName("张三");			student1.setAge(18);			student1.setsNo("nb007");			 outputStream = new ObjectOutputStream(new FileOutputStream(dest));			IoUtil.writeObjects(outputStream,isCloseOut,student,student1);			IoUtil.close(outputStream);			//创建序列化流对象			fis = new FileInputStream(dest);			inputStream = new ObjectInputStream(fis);			//读取			Object obj =null;			//用available判断是否达到了文件末尾			while(fis.available()>0) {				obj=inputStream.readObject();				System.out.println(obj);			}		}catch (Exception e) {			//抛出一个运行时异常(直接停止掉程序)			throw new RuntimeException("运行时异常",e);		} finally {			IoUtil.close(outputStream);			IoUtil.close(inputStream);			IoUtil.close(fis);		}