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jox(关于java处理xml文档的讨论)
我不喜欢灌水的人。。。。。。
给大家点有关jox方面的。。。。^_^刚学习的哦。。请多包含哦
jox是一套用户xml document．和java beans之间进行数据传递的java类库。
一个简单直接的jox实例：
jox是非常的简单易用。假设你现在已经有了下面的java bean。
package com.wutka.jox.test;
import com.wutka.jox.*;
import java.util.*;
public class testbean implements java.io.serializable
{
protected int foo;
protected string bar;
protected java.util.date baz;
protected vector thingies;
protected testsubbean subbean;
public testbean()
{
bar = "";
baz = new date();
thingies = new vector();
}
public int getfoo() { return foo; }
public void setfoo(int afoo) { foo = afoo; }
public string getbar() { return bar; }
public void setbar(string abar) { bar = abar; }
public java.util.date getbaz() { return baz; }
public void setbaz(java.util.date abaz) { baz = abaz; }
public testsubbean getsub() { return subbean; }
public void setsub(testsubbean asub) { subbean = asub; }
public string[] getthingies()
{
string[] retthingies = new string[thingies.size()];
if (thingies.size() > 0) thingies.copyinto(retthingies);
return retthingies;
}
public void setthingies(string[] newthingies)
{
thingies = new vector(newthingies.length);
for (int i=0; i < newthingies.length; i++)
{
thingies.addelement(newthingies[i]);
}
}
public string getthingies(int i)
{
return (string) thingies.elementat(i);
}
public void setthingies(int i, string thingy)
{
thingies.setelementat(thingy, i);
}
public string tostring()
{
stringbuffer ret = new stringbuffer(
"foo="+foo+";bar="+bar+";baz="+baz.tostring()+
";thingies=");
for (int i=0; i < thingies.size(); i++)
{
if (i > 0) ret.append(",");
ret.append((string) thingies.elementat(i));
}
ret.append(";sub=");
ret.append(subbean.tostring());
return ret.tostring();
}
}
并且你已创建了下面的 xml 文件：
<?xml version="1.0"?>
<marktest>
<thingies>moe</thingies>
<thingies>larry</thingies>
<thingies>curly</thingies>
<thingies>shemp</thingies>
<thingies>curly joe</thingies>
<foo>5</foo>
<baz>6/25/00 12:46 am</baz>
<bar>this is the bar value</bar>
<sub>
<age>35</age>
<name>mark</name>
</sub>
</marktest>
下面的程序将读出
xml并把数据存储于testbean：
package com.wutka.jox.test;
import com.wutka.jox.*;
import
java.io.*;
public class testdeser
{
public static void main(string[] args)
{
try
{
fileinputstream in = new fileinputstream("bean.
xml");
joxbeaninputstream joxin = new joxbeaninputstream(in);
testbean testbean = (testbean) joxin.readobject(
testbean.class);
system.out.println(testbean);
}
catch (exception exc)
{
exc.printstacktrace();
}
}
}
你现在能作的就是创建fileinputstream或者filereader去读取
xml文件，并且把它打包进joxbeaninputstream或者joxbeanreader。接着你就可以让jox读这个对象和该对象的类。
写一个输出
xml文件的bean就这么简单啦^_^：
package com.wutka.jox.test;
import com.wutka.jox.*;
import
java.io.*;
public class testser
{
public static void main(string[] args)
{
try
{
testbean b = new testbean();
b.setfoo(5);
b.setbar("this is the bar value");
b.setthingies(new string[] {
"moe", "larry", "curly", "shemp", "curly joe" });
testsubbean sub = new testsubbean();
sub.setname("mark");
sub.setage(35);
b.setsub(sub);
fileoutputstream fileout = new fileoutputstream("bean.
xml");
joxbeanoutputstream joxout = new joxbeanoutputstream(fileout);
joxout.writeobject("marktest", b);
joxout.close();
}
catch (exception exc)
{
exc.printstacktrace();
}
}
}
你必须在这个
java bean中设置一些值，创建一个用于写
xml文件的输出流，用joxbeanoutputstream或者joxbeanwriter规定这个输出流，并写相应的对象。以后，你就不必重复做这些工作啦^_^。只要你有了dtd,jox就可以根据这个dtd识别根标签了。
为了后面的例子，我假定你已经创建了下面的dtd文件了：
<?xml version="1.0" encoding="iso-8859-1"?>
<!element marktest (thingies*, foo?, bar?, baz? s-u-b?)>
<!element thingies #pcdata>
<!element foo #pcdata>
<!element bar #pcdata>
<!element baz #pcdata>
<!element s-u-b (age)>
<!element age #pcdata>
<!attlist s-u-b name cdata "">
下面的程序可以读取dtd文件并且传递给jox,使jox可以规范输出啦^_^：
package com.wutka.jox.test;
import com.wutka.jox.*;
import com.wutka.jox.dtd.*;
import
java.io.*;
public class testserdtd
{
public static void main(string[] args)
{
try
{
testbean b = new testbean();
b.setfoo(5);
b.setbar("this is the bar value");
b.setthingies(new string[] {
"moe", "larry", "curly", "shemp", "curly joe" });
testsubbean sub = new testsubbean();
sub.setname("mark");
sub.setage(35);
b.setsub(sub);
fileoutputstream fileout = new fileoutputstream("bean.
xml");
filereader reader = new filereader("testbean.dtd");
parser dtdparser = new parser();
dtd dtd = dtdparser.parse(reader);
reader.close();
joxbeanoutputstream joxout = new joxbeanoutputstream(dtd, fileout);
joxout.writeobject("marktest", b);
joxout.close();
}
catch (exception exc)
{
exc.printstacktrace();
}
}
}
