hutool实战:IoUtil 流操作工具类（将内容写到流中）

  cn.hutoolhutool-core5.6.5

 File dest = new File("C:\\Users\\Administrator\\Desktop\\xuzhu/writeTest1.txt") ; OutputStream outputStream = null; try { outputStream = new FileOutputStream(dest); boolean isCloseOut = false; String str = "1hello 小虚竹\n2hello 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:\\Users\\Administrator\\Desktop\\xuzhu/writeTest3.txt") ; OutputStream outputStream = null; try {<em style="color:transparent">来源[email protected]搞@^&代*@码)网</em> outputStream = new FileOutputStream(dest); boolean isCloseOut = false; String str = "1hello 小虚竹\n2hello 小虚竹"; //覆盖，不是追加 IoUtil.write(outputStream,"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); } 

 File dest = new File("C:\\Users\\Administrator\\Desktop\\xuzhu/writeTest2.txt") ; OutputStream outputStream = null; try { outputStream = new FileOutputStream(dest); boolean isCloseOut = false; String str = "1hello 小虚竹\n2hello 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:\\Users\\Administrator\\Desktop\\xuzhu/writeTest3.txt") ; OutputStream outputStream = null; try { outputStream = new FileOutputStream(dest); boolean isCloseOut = false; String str = "1hello 小虚竹\n2hello 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:\\Users\\Administrator\\Desktop\\xuzhu/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); }