hutool实战:IoUtil 流操作工具类（将内容写到流中）

<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);
		}