嘿，我想用 java 读写 xml 代码，所以我用谷歌搜索了怎么做，但我发现只有引擎才能读取真正简单的 xml 代码，例如
<?xml version="1.0"?>
<company>
<staff>
<firstname>yong</firstname>
<lastname>mook kim</lastname>
<nickname>mkyong</nickname>
<salary>100000</salary>
</staff>
<staff>
<firstname>low</firstname>
<lastname>yin fong</lastname>
<nickname>fong fong</nickname>
<salary>200000</salary>
</staff>
</company>
但我想阅读更高级的内容，例如：
<?xml version="1.0" encoding="UTF-8"?>
<package>
<template name="store_avatars">
<!-- UI validation for this file -->
<panel noclick="1" onload="CreateBool('ui_avatars_package_loaded', true);"/>
<!-- Female Pyromancer -->
<instance name="altAvatarPreviewPanel"
heroEntryID="1"
id="15"
product="Hero_Pyromancer.Female"
definition="/heroes/pyromancer"
heroName="Hero_Pyromancer"
hero_icon_path="/heroes/pyromancer/icon.tga"
hasvoice="true"
hasmodel="true"
hastexture="true"
hassounds="true"
hasanimations="true"
haseffects="false"
/>
<!-- Sexy Moon Queen -->
<instance name="altAvatarPreviewPanel"
heroEntryID="2"
id="16"
product="Hero_Krixi.Sexy"
definition="/heroes/krixi"
heroName="Hero_Krixi"
hero_icon_path="/heroes/krixi/icons/hero.tga"
hasvoice="false"
hasmodel="true"
hastexture="true"
hasanimations="true"
haseffects="false"
/>
</template>
</package>
所以我继续为此做了我自己的课程，
package Lindholm.languages;
import java.util.Vector;
import Lindholm.LLException;
import Lindholm.LLString;
import Lindholm.com.LLProperty;
public class Xml {
//STATIC variables;
//Variables;
private Tag tag;
//Setup;
//Constructor;
public Xml(String xml) {
int index1;
//First removing all the comments so they dont' disturb the decoding;
index1 = 0;
while((index1 = xml.indexOf("<!--",index1)) != -1) {
int index2;
if((index2 = xml.indexOf("-->",index1)) != -1) {
String comment = xml.substring(index1,index2+"-->".length());
xml = LLString.replace(xml,comment,"",1);
}
else {
try {
throw new Exception("Invail xml code, missing \"-->\".");
} catch (Exception e) {
new LLException(e);
}
}
}
//replacing all "/>" cancelings to "</[abc]>";
index1 = 0;
while((index1 = xml.indexOf("/>",0)) != -1) {
int index2;
String revstr = LLString.reverse(xml.substring(0,index1+"/>".length()));
index2 = revstr.indexOf("<",0);
index2 = revstr.length()-index2;
String name = xml.substring(index2,index1).split("\\s")[0];
xml = LLString.replace(xml,"/>","></"+name+">",1);
}
//Adding index's to all tags which will make the decoding easier.
index1 = 0;
int n = 0;
Vector<Integer> openings = new Vector<Integer>();
while(true) {
int index0 = index1;
int index2;
n++;
index1 = xml.indexOf("<",index0);
index2 = xml.indexOf("</",index0);
if(index1 != -1) {
index1 += "<".length();
}
if(index1 != -1 && (index1 < index2 || index2 == -1)) {
xml = xml.substring(0,index1)+n+"-"+xml.substring(index1);
openings.add(n);
index1 += (n+"-").length();
}
else if(index2 != -1 && (index2 < index1 || index1 == -1)) {
xml = xml.substring(0,index2+"</".length())+openings.get(openings.size()-1)+"-"+xml.substring(index2+"</".length());
index1 += (openings.get(openings.size()-1)+"-").length();
openings.remove(openings.size()-1);
}
else {
break;
}
}
//Now let's decode it!!!
xml = xml+"</1-?xml>";
tag = readTag(xml,"1-?xml");
}
//Set;
//Get;
public Tag getTag() {
return tag;
}
//Add;
//Remove;
//Do;
//Other;
private Tag readTag(String xmltag,String tagname) {
int index1 = ("<"+tagname).length(); //subract 1 due the first index is 0!
int index2;
String body = xmltag.substring(xmltag.indexOf(">",0)+">".length(),xmltag.indexOf("</"+tagname,0));
LLProperty properties;
Vector<Tag> children = new Vector<Tag>();
index2 = xmltag.indexOf(">",index1);
String xmlproperties = xmltag.substring(index1,index2);
properties = readProperties(xmlproperties);
while((index1 = body.indexOf("<",0)) != -1) {
index2 = body.indexOf(">",index1);
String subtagname = body.substring(index1+"<".length(),index2).split("\\s")[0];
index2 = body.indexOf("</"+subtagname,index1)+"</".length();
index2 = body.indexOf(">",index2)+">".length();
String subxmltag = body.substring(index1,index2);
body = LLString.replace(body,subxmltag,"",1);
children.add(readTag(subxmltag,subtagname));
}
if(children.size() == 0) {
body = null;
}
tagname = tagname.split("-")[1];
Tag tag = new Tag(tagname,body);
tag.setProperties(properties);
tag.setChildren(children);
return tag;
}
private LLProperty readProperties(String xmlproperties) {
LLProperty properties = new LLProperty();
int index1 = 0;
int index2;
while(xmlproperties.substring(index1).contains("=")) {
index2 = xmlproperties.indexOf("=",index1);
String key = LLString.trimAll(xmlproperties.substring(index1,index2));
key = key.trim();
index1 = index2+"=".length();
int squote = xmlproperties.indexOf("'",index1);
int dquote = xmlproperties.indexOf("\"",index1);
String quote = "";
if(squote != -1 && (squote < dquote || dquote == -1)) {
quote = "'";
}
else if(dquote != -1 && (dquote < squote || squote == -1)) {
quote = "\"";
}
else {
try {
throw new Exception("Invail xml code, missing parameters.");
} catch (Exception e) {
new LLException(e);
}
}
index1 = xmlproperties.indexOf(quote,index1)+quote.length();
index2 = xmlproperties.indexOf(quote,index1);
String value = xmlproperties.substring(index1,index2);
properties.setProperty(key,value);
index1 = index2+quote.length();
}
return properties;
}
public void print() {
String xml = "";
for(int i = 0;i <= tag.getChildren()-1;i++) {
xml += printTag(tag.getChild(i),"");
}
xml = "<?xml version=\"1.0\" encoding=\"UTF-8\"?>\n"+
xml;
System.out.println(xml);
}
private String printTag(Tag tag,String height) {
String xml = height+"<"+tag.getTag();
Object[] keys = tag.getProperties().stringPropertyNames().toArray();
String prop = " ";
if(keys.length >= 5) {
prop = "\n"+height+" ";
}
for(int i = 0;i <= keys.length-1;i++) {
xml += prop+keys[i]+"=\""+tag.getProperties().getProperty(keys[i].toString())+"\"";
}
if(tag.getBody() == null) {
xml += "/>\n";
}
else {
xml += LLString.replace(prop+">\n"," ","",1);
for(int i = 0;i <= tag.getChildren()-1;i++) {
xml += printTag(tag.getChild(i),height+" ");
}
xml += height+"</"+tag.getTag()+">\n";
}
return xml;
}
//Implements;
}
并标记
package Lindholm.languages;
import java.util.Vector;
import Lindholm.com.LLProperty;
public class Tag {
//STATIC variables;
//Variables;
private String tag;
private String body;
private LLProperty properties;
private Vector<Tag> children = new Vector<Tag>();
//Setup;
//Constructor;
public Tag(String name,String body) {
tag = name;
this.body = body;
}
//Set;
public void setProperties(LLProperty properties) {
this.properties = properties;
}
public void setChildren(Vector<Tag> children) {
this.children = children;
}
//Get;
public String getTag() {
return tag;
}
public String getBody() {
return body;
}
public LLProperty getProperties() {
return properties;
}
public int getChildren() {
return children.size();
}
public Tag getChild(int index) {
return children.get(index);
}
public Tag getChildByTag(String tagname) {
for(int i = 0;i <= getChildren()-1;i++) {
if(getChild(i).getTag().equals(tagname)) {
return getChild(i);
}
}
return null;
}
public Tag getChildByTag(String tagname,int number) {
for(int i = 0;i <= getChildren()-1;i++) {
if(getChild(i).getTag().equals(tagname)) {
if(number == 0) {
return getChild(i);
}
else {
number--;
}
}
}
return null;
}
//Add;
public void addChild(Tag child) {
children.add(child);
}
//Remove;
//Do;
//Other;
//Implements;
}
现在我的问题是它非常慢，还有其他方法可以完成我想要的吗？或者可能是一种让它更快的方法？，也许我的代码很糟糕？