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Mon, 28 Nov 2011 09:16:00 GMT

@import url(http://www.tkk7.com/CuteSoft_Client/CuteEditor/Load.ashx?type=style&file=SyntaxHighlighter.css);@import url(/css/cuteeditor.css);

首先�?JiBX �|�站下蝲 JiBX�Q�当前最新版本是 beta 3。解开下蝲�?zip 文�g�Q�里面有一�?lib 目录�Q�包含了 bcel.jar, jibx-bind.jar, jibx-extras.jar, jibx-run.jar, xpp3.jar 五个 jar 文�g。bcel.jar, jibx-bind.jar 只有�?binding compiler 的时候才用得到。jibx-extras.jar 是一个可选的工具包，里面有一些测试和验证的工��L��?nbsp;
1.定义一个我们将要处�?XML 文�g�Q�文件名�?data.xml�Q�内容如下：

<customer>
<person>
  <cust-num>123456789cust-num>
  <first-name>Johnfirst-name>
  <last-name>Smithlast-name>
person>
<street>12345 Happy Lanestreet>
<city>Plunkcity>
<state>WAstate>
<zip>98059zip>
<phone>888.555.1234phone>
customer>

�q�个 XML 文�g非常��单，共有十个元素�Q�没有属性。根元素 customer �?person, street, city, state, zip, phone 六个子元素。其中元�?person �?cust-num, first-name, last-name 三个子元素�?nbsp;
2.接着定义两个 Java �c?Customer �?Person�Q�也采用最��单的方式�Q�用对象的域值对应元素，内容如下�Q?nbsp;

public class Customer {
  public Person person;
  public String street;
  public String city;
  public String state;
  public Integer zip;
  public String phone;
}

public class Person {
  public int customerNumber;
  public String firstName;
  public String lastName;
}

�q�个两个�c�L��有�Q何方法，够简单吧�Q�或�怽�已经看出来了�Q�Customer �cȝ��七个 field 对应的是 XML 文�g�?customer 元素的七个子元素。Person �cȝ��三个 field 对应的是 person 元素的三个子元素。在 Person �cȝ�� field 的名�U��ƈ不是�?person 元素的子元素名称完全相等�Q�这是遵�?Java �~�程规范 field 命名的需要，虽然不相�{�，但这不重要，可以在绑定定义文挡中把它们一一对应��h��?nbsp;
3.�l�定定义文挡
�l�定定义文挡是依据绑定定义规范将 XML 数据�?Java 对象�l�定�?XML 文挡。文件名�?binding.xml�Q�内容如下：

binding.xml 文�g中的 name �?field 属性分别将 XML 中的元素�?Java 对象中的 field 一一对应�q�绑定�v来�?nbsp;

mapping 元素�?name �?class 属性将 customer 根元素和 Customer �cȝ��定在一赗��?nbsp;

public Person person;
上面两行定义�?person �?Customer �?field�Q�同时也�?person 元素�?person �cȝ��定在一赗��?nbsp;

<binding>
<mapping name="customer" class="Customer">
  <structure name="person" field="person">
   <value name="cust-num" field="customerNumber"/>
   <value name="first-name" field="firstName"/>
   <value name="last-name" field="lastName"/>
  structure>
  <value name="street" field="street"/>
  <value name="city" field="city"/>
  <value name="state" field="state"/>
  <value name="zip" field="zip"/>
  <value name="phone" field="phone"/>
mapping>
binding>

4.执行 Binding Compiler �q�程
以下命��o是在 Linux 下执行，如果�?Windows �q�_��误��{换成相应的命�?nbsp;

#javac Person.java
#javac -classpath . Customer.java
#java -jar lib/jibx-bind.jar binding.xml

执行完后�Q�在当前目录多了四个 class 文�g�Q�分别是 Person.class, Customer.class, JiBX_bindingCustomer_access.class, JiBX_bindingFactory.class�?nbsp;
5.执行 binding runtime �q�程
接着写一个简单的��d�� data.xml ��试�E�序 Test.java�Q�内容如下：

import java.io.FileInputStream;
import java.io.FileNotFoundException;

import org.jibx.runtime.JiBXException;
import org.jibx.runtime.IBindingFactory;
import org.jibx.runtime.BindingDirectory;
import org.jibx.runtime.IUnmarshallingContext;

class Test {
  public static void main(String[] args) {
  try{
    IBindingFactory bfact = BindingDirectory.getFactory(Customer.class);
    IUnmarshallingContext uctx = bfact.createUnmarshallingContext();
    Customer customer = (Customer)uctx.unmarshalDocument(new FileInputStream("data.xml"), null);
    Person person = customer.person;

    System.out.println("cust-num:" + person.customerNumber);
    System.out.println("first-name:" + person.firstName);
    System.out.println("last-name:" + person.lastName);
    System.out.println("street:" + customer.street);
  }catch(FileNotFoundException e){
    System.out.println(e.toString());
  }catch(JiBXException e){
    System.out.println(e.toString());
  }
}
}

�~�译�q�运行这个测试程�?nbsp;

#javac -classpath .:lib/jibx-run.jar Test.java
#java -cp .:lib/jibx-run.jar:lib/xpp3.jar Test

�E�序�q�行的结果是

cust-num:123456789
first-name:John
last-name:Smith
street:12345 Happy Lane

王树�?/a> 2011-11-28 17:16 发表评论

Fri, 22 Jul 2011 04:55:00 GMT

@import url(http://www.tkk7.com/CuteSoft_Client/CuteEditor/Load.ashx?type=style&file=SyntaxHighlighter.css);@import url(/css/cuteeditor.css);

//使用Groovy �E�微改了�?br /> import java.io.File;
import java.io.FileInputStream;
import java.util.zip.GZIPOutputStream
import java.util.zip.ZipEntry
import java.util.zip.ZipOutputStream

class Compress {

    public static gzipFile(from,to) throws IOException{
        def inFile = new FileInputStream(from);
        def out = new GZIPOutputStream(new FileOutputStream(to));
        byte[] buffer = new byte[4096];
        def buffer_read = 0;
        while((buffer_read = inFile.read(buffer)) != -1){
//            out.write(buffer,0,buffer_read);//use '<<' replace
            out << buffer;//use '<<' replace
        }
        inFile.close();
        out.close();
    }

    public static zipDirectory(dir,zipFile){
        File dire = new File(dir);
        if(!dire.isDirectory()){
            throw new IllegalArgumentException('Compress: not a directory:' + dir);
        }
        String[] entries = dire.list();
        byte[] buffer = new byte[4096];
        int bytes_read;

        ZipOutputStream out = new ZipOutputStream(new FileOutputStream(zipFile));

        entries.each{item ->
            File f = new File(dire,item);
            if(f.isDirectory()){
                return ;
            }
            FileInputStream in_file = new FileInputStream(f);
            ZipEntry entry = new ZipEntry(f.getPath());
            out.putNextEntry (entry);
            while((bytes_read = in_file.read(buffer)) != -1){
                out << buffer;
            }
            in_file.close();
        }
        out.close();
    }

    static main(args) {
        def from = args[0];
        File from_file = new File(from);
        def directory = from_file.isDirectory();
        def to = '';
        if(directory){
            to = from + '.zip';
        }else{
            to = from + '.gz';
        }

        if((new File(to)).exists()){
            println('Compress: won\'t overwrite existing file:' + to);
            System.exit(0);
        }
        if(directory)
            Compress.zipDirectory (from, to);
        else
            Compress.gzipFile from, to;
    }
}

王树�?/a> 2011-07-22 12:55 发表评论

对Java File�cȝ��操作-- delete

Thu, 07 Jul 2011 05:13:00 GMT

@import url(http://www.tkk7.com/CuteSoft_Client/CuteEditor/Load.ashx?type=style&file=SyntaxHighlighter.css);@import url(/css/cuteeditor.css);

执行File.delete()时最好做一�p�d��的验证�?/div>

import java.io.File;
public class Delete {
    public Delete() {
        // TODO Auto-generated constructor stub
    }
    /**
     * @param args
     */
    public static void main(String[] args) {
        if(args.length != 1){
            System.err.println("Usage:java Delete");
            System.exit(0);
        }

        try{
            delet1e(args[0]);
        }catch(IllegalArgumentException e){
            System.err.println(e.getMessage());
        }
    }
    private static void delet1e(String fileName) {
        File f = new File(fileName);
        if(!f.exists())
            fail("Delete:no such file or firectory:" + fileName);
        if(!f.canWrite())
            fail("Delete:write protected :" + fileName);
        if(f.isDirectory()){
            String[] files = f.list();
            if(files.length > 0)
                fail("Delete:directory not empty:" + fileName);
        }
        boolean success = f.delete();
        if(!success)
            fail("Delete: delete failed");
    }
    private static void fail(String msg)throws IllegalArgumentException {
        // TODO Auto-generated method stub
        throw new IllegalArgumentException(msg);
    }
}

王树�?/a> 2011-07-07 13:13 发表评论

Java Object 序列化成XML以及XML反序列化成Java Object

Mon, 04 Jul 2011 12:55:00 GMT

@import url(http://www.tkk7.com/CuteSoft_Client/CuteEditor/Load.ashx?type=style&file=SyntaxHighlighter.css);@import url(/css/cuteeditor.css);

package org.sl.bean;

import java.beans.XMLDecoder;
import java.beans.XMLEncoder;
import java.io.BufferedInputStream;
import java.io.BufferedOutputStream;
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.io.Serializable;

public class ObjectXmlSerial {

    public static void main(String[] args) throws IOException{
        UserBean user = new UserBean();
        OtherUserInfoBean otherUserInfo = new OtherUserInfoBean();

        otherUserInfo.setAddress("汉字");
        otherUserInfo.setEmail("test@test.com");

        user.setName("hello");
        user.setPassword("world");

        user.setOtherUserInfo(otherUserInfo);

        ByteArrayOutputStream byteArrayOut = new ByteArrayOutputStream();
        BufferedOutputStream bufferOut = new BufferedOutputStream(byteArrayOut);

        writeObjectToXML(bufferOut, user);
        byte[] bys = byteArrayOut.toByteArray();

        byteArrayOut.close();
        bufferOut.close();


        ByteArrayInputStream byteArrayIn = new ByteArrayInputStream(bys);
        BufferedInputStream bufferIn = new BufferedInputStream(byteArrayIn);

        UserBean user1 = readObjectFromXML(bufferIn);

        byteArrayIn.close();
        bufferIn.close();

        System.out.println(user1.getName());
        System.out.println(user1.getOtherUserInfo().getAddress());
    }

    public static void writeObjectToXML(OutputStream out, T obj){
        XMLEncoder xmlEncoder = null;

        try{
            xmlEncoder = new XMLEncoder(out);
            xmlEncoder.writeObject(obj);
        }finally{
            if(null != xmlEncoder)
                xmlEncoder.close();
        }
    }

    @SuppressWarnings("unchecked")
    public static T readObjectFromXML(InputStream in){
        T obj = null;
        XMLDecoder xmlDecoder = null;

        try{
            xmlDecoder = new XMLDecoder(in);
            obj = (T) xmlDecoder.readObject();
        }finally{
            if(null != xmlDecoder)
                xmlDecoder.close();
        }
        return obj;
    }
}

王树�?/a> 2011-07-04 20:55 发表评论