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java 的序列化
(1) 首先是java自己内部实现的对象序列化机制 其实就是ObjectInputStream 和 ObjectOutputStream
首先实现一个实体对象 记住必须实现Serializable 接口
package com.rpc;import java.io.Serializable;public class Student implements Serializable{ private static final long serialVersionUID = 5915058853403173212L; private String id; private String name; private String sex; private int age; public String getId() { return id; } public void setId(String id) { this.id = id; } public String getName() { return name; } public void setName(String name) { this.name = name; } public String getSex() { return sex; } public void setSex(String sex) { this.sex = sex; } public int getAge() { return age; } public void setAge(int age) { this.age = age; } }然后是将对象以文件的形式保存
package com.rpc;import java.io.File;import java.io.FileOutputStream;import java.io.ObjectOutputStream;public class ObjectChuanshu { public static void main(String[] args) { Student student = new Student(); student.setAge(23); student.setId("123"); student.setName("张三"); student.setSex("男"); FileOutputStream fout = null; ObjectOutputStream oos = null; try{ fout = new FileOutputStream(new File("d:/1.object")); oos = new ObjectOutputStream(fout); oos.writeObject(student); oos.flush(); fout.flush(); }catch(Exception e){ System.out.println(e.getMessage()); e.printStackTrace(); }finally{ try{ oos.close(); fout.close(); }catch(Exception e){} } }}然后是从文件中读出对象
package com.rpc;import java.io.File;import java.io.FileInputStream;import java.io.ObjectInputStream;public class ReadObject { public static void main(String[] args) { FileInputStream fin = null; ObjectInputStream ois = null; try{ fin = new FileInputStream(new File("d:/1.object")); ois = new ObjectInputStream(fin); Student student = (Student)ois.readObject(); System.out.println(student.getName()); }catch(Exception e){ System.out.println(e.getMessage()); e.printStackTrace(); }finally{ try{ fin.close(); ois.close(); }catch(Exception e){} } }}输出结果
张三
Hessian 的对象 序列化 需要添加 hessian.jar
package com.rpc;import java.io.ByteArrayInputStream;import java.io.ByteArrayOutputStream;import com.caucho.hessian.io.Hessian2Input;import com.caucho.hessian.io.Hessian2Output;public class HessianObject { private String filePath; public HessianObject(String filePath){ this.filePath = filePath; } /** * 将对象保存到指定的文件中 * @param filePath * @throws Exception */ public byte[] writeObject(Student student) throws Exception{ Hessian2Output hout = null; ByteArrayOutputStream baos = null; try{ baos = new ByteArrayOutputStream(); hout = new Hessian2Output(baos); hout.writeObject(student); hout.flush(); }catch(Exception e){ throw e; }finally{ } return baos.toByteArray(); } /** * 读取文件中的对象 * @param filePath * @throws Exception */ public Student readObject(byte[] buffer)throws Exception{ Hessian2Input hin = null; Student student = null; ByteArrayInputStream bais = null; try{ bais = new ByteArrayInputStream(buffer); hin = new Hessian2Input(bais); student = (Student)hin.readObject(); }catch(Exception e){ throw e; }finally{ } return student; } public static void main(String[] args) { HessianObject hessianObject = new HessianObject("d:/2.object"); Student student = new Student(); student.setAge(18); student.setId("12345"); student.setName("李四"); student.setSex("女"); try{ byte[] buffer = hessianObject.writeObject(student); Student s = hessianObject.readObject(buffer); System.out.println(s.getName()); }catch(Exception e){ System.out.println(e.getMessage()); e.printStackTrace(); } }}输出结果
李四
java 的序列化
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