前端之家收集整理的这篇文章主要介绍了
XML动态生成相对应的类，
前端之家小编觉得挺不错的，现在分享给大家，也给大家做个参考。
import java.util.Iterator;
import java.util.Map;
import java.util.Set;
import net.sf.cglib.beans.BeanGenerator;
import net.sf.cglib.beans.BeanMap;
public class CglibBean {
/**
* 实体Object
*/
public Object object = null;
/**
* 属性map
*/
public BeanMap beanMap = null;
public String nodeName = "";
public String nodeText = "";
public CglibBean() {
super();
}
@SuppressWarnings("unchecked")
public CglibBean(Map propertyMap) {
this.object = generateBean(propertyMap);
this.beanMap = BeanMap.create(this.object);
}
/**
* 给bean属性赋值
*
* @param property
* 属性名
* @param value
* 值
*/
public void setValue(String property,Object value) {
beanMap.put(property,value);
}
/**
* 通过属性名得到属性值
*
* @param property
* 属性名
* @return 值
*/
public Object getValue(String property) {
return beanMap.get(property);
}
/**
* 得到该实体bean对象
*
* @return
*/
public Object getObject() {
return this.object;
}
@SuppressWarnings("unchecked")
private Object generateBean(Map propertyMap) {
BeanGenerator generator = new BeanGenerator();
Set keySet = propertyMap.keySet();
for (Iterator i = keySet.iterator(); i.hasNext();) {
String key = (String) i.next();
generator.addProperty(key,(Class) propertyMap.get(key));
}
return generator.create();
}
}
import java.io.ByteArrayInputStream;
import java.io.UnsupportedEncodingException;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.Iterator;
import java.util.List;
import java.util.Map;
import java.util.Set;
import org.dom4j.Attribute;
import org.dom4j.Document;
import org.dom4j.DocumentException;
import org.dom4j.Element;
import org.dom4j.io.SAXReader;
import org.junit.Test;
public class XMLTest {
private static String text = "<?xml version=\"1.0\" encoding=\"UTF-8\"?><books><book id=\"book\"><title id=\"title\">Harry Potterads</title></book></books>";
@Test
public void go() {
SAXReader reader = new SAXReader();
Document document;
try {
document = reader.read(new ByteArrayInputStream(text
.getBytes("UTF-8")));
CglibBean cglibBean = create(document.getRootElement(),getChildren(document.getRootElement()));
StringBuffer sb = new StringBuffer();
sb.append(getStartNode(cglibBean));
sb.append(getNodeChildren(cglibBean));
sb.append("</").append(cglibBean.nodeName).append(">");
System.out.println(sb.toString());
} catch (UnsupportedEncodingException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (DocumentException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
// test(root);
catch (ClassNotFoundException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
@SuppressWarnings("unchecked")
public String getNodeChildren(CglibBean cglibBean) {
Map<String,List<CglibBean>> map = (Map<String,List<CglibBean>>) cglibBean
.getValue("children");
Set<?> keySet = map.keySet();
StringBuffer sb = new StringBuffer();
for (Iterator<?> i = keySet.iterator(); i.hasNext();) {
String key = (String) i.next();
List<CglibBean> cglibBeans = map.get(key);
for (CglibBean bean : cglibBeans) {
sb.append(getStartNode(bean));
if (!"".equals(bean.nodeText)) {
sb.append(bean.nodeText);
} else {
sb.append(getNodeChildren(bean));
}
sb.append("</").append(bean.nodeName).append(">");
}
}
return sb.toString();
}
public String getStartNode(CglibBean cglibBean) {
Set<?> keySet = cglibBean.beanMap.keySet();
StringBuffer startNode = new StringBuffer();
startNode.append("<").append(cglibBean.nodeName);
for (Iterator<?> i = keySet.iterator(); i.hasNext();) {
String key = (String) i.next();
if (key.indexOf(".attr") != -1) {
String temp = key.substring(0,key.indexOf(".attr"));
temp = temp.substring(temp.lastIndexOf(".") + 1,temp.length());
startNode.append(" ").append(temp).append("=\"")
.append(cglibBean.getValue(key)).append("\"");
}
}
startNode.append(">");
return startNode.toString();
}
public String getNodeText(CglibBean cglibBean) {
String text = "";
Set<?> keySet = cglibBean.beanMap.keySet();
for (Iterator<?> i = keySet.iterator(); i.hasNext();) {
String key = (String) i.next();
if (key.indexOf(".text") != -1) {
text = (String) cglibBean.getValue(key);
}
}
return text;
}
@SuppressWarnings("unchecked")
public Map<String,List<CglibBean>> getChildren(Element element)
throws ClassNotFoundException {
Map<String,List<CglibBean>> children = new HashMap<String,List<CglibBean>>();
for (Element child : (List<Element>) element.elements()) {
Map<String,List<CglibBean>> cglibBeanMap = getChildren(child);
CglibBean cglibBean = create(child,cglibBeanMap);
List<CglibBean> cglibBeanList = children.get(child.getName());
if (cglibBeanList == null) {
cglibBeanList = new ArrayList<CglibBean>();
cglibBeanList.add(cglibBean);
children.put(child.getName(),cglibBeanList);
} else {
cglibBeanList.add(cglibBean);
children.put(child.getName(),cglibBeanList);
}
}
return children;
}
CglibBean cglibBean;
@SuppressWarnings("unchecked")
public CglibBean create(Element element,Map<String,List<CglibBean>> children)
throws ClassNotFoundException {
HashMap<String,Class<?>> propertyMap = new HashMap<String,Class<?>>();
for (Attribute attribute : (List<Attribute>) element.attributes()) {
propertyMap.put(element.getName() + "." + attribute.getName()
+ ".attr",Class.forName("java.lang.String"));
}
propertyMap.put(element.getName() + ".text",Class.forName("java.lang.String"));
propertyMap.put("children",Class.forName("java.util.Map"));
// 生成动态 Bean
CglibBean bean = new CglibBean(propertyMap);
bean.nodeName = element.getName();
bean.nodeText = element.getText();
for (Attribute attribute : (List<Attribute>) element.attributes()) {
bean.setValue(element.getName() + "." + attribute.getName()
+ ".attr",attribute.getText());
}
bean.setValue(element.getName() + ".text",element.getText());
bean.setValue("children",children);
return bean;
}
}目前解析思路是：books是一个类，类有个集合
属性children，children类型Map<String,List<CglibBean>>，专门存放各种各样的
属性，比如：book
属性，以此类推。本来想换个思路实现，由于项目没有用到，就停止了。大概说一下另外种做法，books是一个类，类有个book
属性，而不是把所有
属性全部放在Map<String,List<CglibBean>>中。
原文链接：https://www.f2er.com/xml/299036.html
