java DOM解析XML
1、xml测试文件：data.xml
<?xml version="1.0" encoding="utf-8"?>
<Result>
<ENTITY>
<FIELDNAME>GA</FIELDNAME>
<TYPE>int</TYPE>
<MIN>1</MIN>
<MAX>100</MAX>
</ENTITY>
<ENTITY>
<FIELDNAME>GB</FIELDNAME>
<TYPE>string</TYPE>
<LENGTH>100</LENGTH>
</ENTITY>
<ENTITY>
<FIELDNAME>GC</FIELDNAME>
<TYPE>enum</TYPE>
<RANGE>1-100,255</RANGE>
</ENTITY>
</Result>
2、接收实体类Entity.java:
import java.util.ArrayList;
import java.util.List;
/**
* Created by Administrator on 2017/5/28.
*/
public class Entity {
private String fieldName;
private String type;
private int min;
private int max;
private List<Integer> range = new ArrayList<Integer>();
private int length;
public String getFieldName() {
return fieldName;
}
public void setFieldName(String fieldName) {
this.fieldName = fieldName;
}
public String getType() {
return type;
}
public void setType(String type) {
this.type = type;
}
public int getMin() {
return min;
}
public void setMin(int min) {
this.min = min;
}
public int getMax() {
return max;
}
public void setMax(int max) {
this.max = max;
}
public List<Integer> getRange() {
return range;
}
public void setRange(List<Integer> range) {
this.range = range;
}
public int getLength() {
return length;
}
public void setLength(int length) {
this.length = length;
}
@Override
public String toString() {
return "Entity{" +
"fieldName='" + fieldName + '\'' +
", type='" + type + '\'' +
", min=" + min +
", max=" + max +
", range=" + range +
", length=" + length +
'}';
}
}
3、测试程序
import org.w3c.dom.Document;
import org.w3c.dom.Element;
import org.w3c.dom.Node;
import org.w3c.dom.NodeList;
import org.xml.sax.SAXException;
import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.parsers.ParserConfigurationException;
import java.io.File;
import java.io.IOException;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
/**
* Created by Administrator on 2017/5/28.
*/
public class DOMTest {
public static void main(String[] args) throws ParserConfigurationException, IOException, SAXException {
File file = new File("data.xml");
DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
DocumentBuilder builder = factory.newDocumentBuilder();
Document document = builder.parse(file);
NodeList nodeList = document.getElementsByTagName("ENTITY");
Map<String,Entity> resultMap = new HashMap<String,Entity>();
for (int i = 0; i < nodeList.getLength(); i++) {
Element entityElement = (Element) nodeList.item(i);
NodeList childNodes = entityElement.getChildNodes();
Entity entity = new Entity();
for (int j = 0; j < childNodes.getLength(); j++) {
if (childNodes.item(j).getNodeType() == Node.ELEMENT_NODE) {
if ("FIELDNAME".equals(childNodes.item(j).getNodeName())) {
entity.setFieldName(childNodes.item(j).getFirstChild().getNodeValue());
} else if ("TYPE".equals(childNodes.item(j).getNodeName())) {
entity.setType(childNodes.item(j).getFirstChild().getNodeValue());
} else if ("MIN".equals(childNodes.item(j).getNodeName())) {
entity.setMin(Integer.valueOf(childNodes.item(j).getFirstChild().getNodeValue()));
} else if ("MAX".equals(childNodes.item(j).getNodeName())) {
entity.setMax(Integer.valueOf(childNodes.item(j).getFirstChild().getNodeValue()));
} else if ("LENGTH".equals(childNodes.item(j).getNodeName())) {
entity.setLength(Integer.valueOf(childNodes.item(j).getFirstChild().getNodeValue()));
} else if ("RANGE".equals(childNodes.item(j).getNodeName())) {
String range = childNodes.item(j).getFirstChild().getNodeValue();
String[] commaStrArr = range.split(",");
List<Integer> rangeList = new ArrayList<Integer>();
for (String str : commaStrArr) {
String[] hyphenStrArr = str.split("-");
if (hyphenStrArr.length == 2) {
int min = Integer.valueOf(hyphenStrArr[0]);
int max = Integer.valueOf(hyphenStrArr[1]);
for (int k = min; k <= max; k++) {
rangeList.add(k);
}
} else if (hyphenStrArr.length == 1) {
rangeList.add(Integer.valueOf(hyphenStrArr[0]));
}
}
entity.setRange(rangeList);
}
}
}
System.out.println(entity);
resultMap.put(entity.getFieldName(), entity);
System.out.println("====================");
}
System.out.println(resultMap);
}
}
4、测试结果：
Entity{fieldName='GA', type='int', min=1, max=100, range=[], length=0}
====================
Entity{fieldName='GB', type='string', min=0, max=0, range=[], length=100}
====================
Entity{fieldName='GC', type='enum', min=0, max=0, range=[1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 64, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79, 80, 81, 82, 83, 84, 85, 86, 87, 88, 89, 90, 91, 92, 93, 94, 95, 96, 97, 98, 99, 100, 255], length=0}
====================
{GC=Entity{fieldName='GC', type='enum', min=0, max=0, range=[1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 64, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79, 80, 81, 82, 83, 84, 85, 86, 87, 88, 89, 90, 91, 92, 93, 94, 95, 96, 97, 98, 99, 100, 255], length=0}, GA=Entity{fieldName='GA', type='int', min=1, max=100, range=[], length=0}, GB=Entity{fieldName='GB', type='string', min=0, max=0, range=[], length=100}}
posted on 2017-05-28 17:16 liulongzhiyu 阅读(153) 评论(0) 编辑 收藏 举报
