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ava全面解析string类型的xml字符串

时间：2022-03-01来源：www.pcxitongcheng.com作者：电脑系统城

解析string类型的xml字符串

我先拼接一个xml格式的字符串，模拟获取了这样的数据，然后再解析

所需要的包自行导入

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33 StringBuilder sb = new StringBuilder();
sb.append("<?xml version=\"1.0\" encoding=\"UTF-8\"?>");
sb.append("<root>");
sb.append(" <header>");
sb.append(" <mark>" + "this is a mark！"+ "</mark>");
sb.append(" </header>");
sb.append(" <body>");
sb.append(" <data>");
sb.append(" <first>");
sb.append(" <second>" + "来解析我啊！"+ "</second>");
sb.append(" </first>");
sb.append(" </data>");
sb.append(" </body>");
sb.append("</root>");
//开始解析
String str= sb.toString();
Document doc = null;
try {
doc = DocumentHelper.parseText(str);
} catch (DocumentException e) {
e.printStackTrace();
}
Element root = doc.getRootElement();// 指向根节点 <root>
try {
Element mark=root.element("header").element("mark");
Element second=root.element("body").element("data").element("first").element("second");
//获取xml的节点内容
System.out.println(mark.getTextTrim());
System.out.println(second.getTextTrim());
}catch(Exception e){
e.printStackTrace();
}

运行结果：

解析String类型t复杂xml,多级节点,最好的例子

需要用jar包 dom4j-1.6.1.jar

字符串xml如下

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31 <root>
<flw>
<name>aa</name>
<age>22</age>
<instance_info>
<num>1</num>
<code>0</code>
<instance>
<ip>10.1.1.2</ip>
<mask>9999</mask>
</instance>
<instance>
<ip>10.1.1.5</ip>
<mask>717</mask>
</instance>
</instance_info>

<instance_info>
<num>2</num>
<code>33</code>
<instance>
<ip>10.1.1.2</ip>
<mask>9999</mask>
</instance>
<instance>
<ip>10.1.1.9</ip>
<mask>878</mask>
</instance>
</instance_info>
</flw>
</root>

解析代码

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50 import java.io.ByteArrayInputStream;
import java.io.UnsupportedEncodingException;
import java.util.Iterator;
import org.dom4j.DocumentException;
import org.dom4j.io.SAXReader;
public class XMLParser {
public static void main(String[] args) {
String xml = "<root><flw><name>aa</name><age>22</age><instance_info><num>1</num><code>0</code><instance><ip>10.1.1.2</ip><mask>9999</mask></instance><instance><ip>10.1.1.5</ip><mask>717</mask></instance></instance_info><instance_info><num>2</num><code>33</code><instance><ip>10.1.1.2</ip><mask>9999</mask></instance><instance><ip>10.1.1.9</ip><mask>878</mask></instance></instance_info></flw></root>";

long start = System.currentTimeMillis();

SAXReader reader = new SAXReader();
try {
org.dom4j.Document doc = reader.read(new ByteArrayInputStream(xml
.getBytes("UTF-8")));
org.dom4j.Element root = doc.getRootElement();
org.dom4j.Element element;
org.dom4j.Element element2;
org.dom4j.Element element3;
for (Iterator i = root.elementIterator("flw"); i.hasNext();) {
element = (org.dom4j.Element) i.next();
System.out
.println("name:[" + element.elementText("name") + "]");
System.out.println("age:[" + element.elementText("age") + "]");
for (Iterator j = element.elementIterator("instance_info"); j
.hasNext();) {
element2 = (org.dom4j.Element) j.next();
System.out.println("\tnum:[" + element2.elementText("num")
+ "]");
System.out.println("\tcode:["
+ element2.elementText("code") + "]");
for (Iterator k = element2.elementIterator("instance"); k
.hasNext();) {
element3 = (org.dom4j.Element) k.next();
System.out.println("\t\tip:["
+ element3.elementText("ip") + "]");
System.out.println("\t\tmask:["
+ element3.elementText("mask") + "]");
}
}
}
} catch (DocumentException e) {
e.printStackTrace();
} catch (UnsupportedEncodingException e) {
e.printStackTrace();
}
long end = System.currentTimeMillis();
System.out.println("耗时：" + (end - start) + "ms");
}
}