Posted on 2009-03-31 17:25
疯狂 阅读(1899)
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bean,bean-->xml"
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-->
由于要和c++交互,就采用了简单的xml数据交换格式,根据需要封装了从xml到bean,和bean到xml,只供参考,不能测试。
package com.dbs.core.util;
import java.lang.reflect.Field;
import java.text.SimpleDateFormat;
import java.util.HashSet;
import java.util.Iterator;
import java.util.List;
import java.util.Set;
import org.dom4j.Element;
import org.dom4j.Node;
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;
import org.apache.commons.beanutils.PropertyUtils;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import com.dbs.qbzb.service.dao.ShiftService;
public class XmlBeanConvertUtil {
private static final Log log = LogFactory.getLog(XmlBeanConvertUtil.class);
private static ShiftService shiftService;
private static final String domain_package = "com.dbs.qbzb.domain";
private static final String domain_package_dot = "com.dbs.qbzb.domain.";
static {
log.debug("开始初始化shiftService...");
ApplicationContext conn = new ClassPathXmlApplicationContext(
new String[] { "classpath:applicationContext-*.xml",
"classpath:datasource-context.xml" });
shiftService = (ShiftService) conn.getBean("shiftService");//来自dao层,根据需要所加,设计中应该去掉,已达到正真的util
}
/*
* 用于 genenateXml()方法 从对象中得到值,以生成xml
*/
public static String getFieldValue(Object objValue, String name) {
StringBuffer xml = new StringBuffer();
if (objValue instanceof java.util.Set) {
xml.append("<" + name + ">");
Set list = (Set) objValue;
if (list == null || list.size() == 0) { // 如果是集合就递归
} else {
for (Iterator iterator = list.iterator(); iterator.hasNext();) {
Object object = (Object) iterator.next();
xml.append(generateXML(object));
}
}
xml.append("</" + name + ">");
}
else if(objValue!=null&&objValue.getClass().getPackage().getName().equals(domain_package)){
xml.append(generateXML(objValue));
}if(objValue==null){
xml.append("<" + name + ">");
xml.append("</" + name + ">");
}
else if (objValue instanceof java.util.Date) { // 处理时间类型
xml.append("<" + name + ">");
java.util.Date valueDate = (java.util.Date) objValue;
SimpleDateFormat formatter = new SimpleDateFormat("yyyyMMdd");
xml.append(formatter.format(valueDate));
xml.append("</" + name + ">");
} else if (objValue instanceof String) {
xml.append("<" + name + ">");
xml.append(objValue);
xml.append("</" + name + ">");
} else if (objValue instanceof Integer) {
xml.append("<" + name + ">");
xml.append(String.valueOf(objValue));
xml.append("</" + name + ">");
}
return xml.toString();
}
/**
* 生成xml
*/
public static String generateXML(Object object) {
Class cls_class = object.getClass();
String cls_str = cls_class.toString();
String objname = cls_str.substring(cls_str.lastIndexOf(".") + 1,
cls_str.length());// 得到类名称,包含前缀
StringBuffer xml = new StringBuffer();
xml.append("<" + objname + ">");
Field[] fields = cls_class.getDeclaredFields(); // 得到成员属性名称,不包含前缀
String name = "";
try {
for (int i = 0; i < fields.length; i++) {
name = fields[i].getName();
if (name.equals("serialVersionUID")) { // 如果是序列号就去掉
continue;
}
Object objValue = PropertyUtils.getProperty(object, name); // 得到属性值
xml.append(getFieldValue(objValue, name));
}
} catch (Exception e) {
log.error("在"+object+"中没有找到属性名为"+name+"的方法...", e);
}
xml.append("</" + objname + ">");
return xml.toString();
}
/*
* 生成bean
*/
public static Object generateBean(Element strXML) {
String name = "";
String type = "";
String classname = "";
Object object = null;
try {
classname = domain_package_dot + strXML.getName();
object = Class.forName(classname).newInstance();
List<Element> e_array = strXML.elements();
for (Iterator iterator = e_array.iterator(); iterator.hasNext();) {
{
Element element = (Element) iterator.next();
name = element.getName();
log.debug("查询到方法节点名"+name);
type = PropertyUtils.getPropertyType(object, name.toLowerCase())
.getName();
object = newObjectByType(object, type, name, element);
}
}
} catch (Exception e) {
log.error(classname+"不存在或者在"+classname+"中没有找到属性名:"+name.toLowerCase(), e);
}
return object;
}
/**
* 根据参数给类赋值
* @param object
* @param type
* @param field_name
* @param element
* @return
*/
private static Object newObjectByType(Object object, String type,
String field_name, Element element) {
try {
if (type.endsWith("java.lang.String")) { //处理String类型
PropertyUtils
.setProperty(object, field_name, element.getText());
} else if (type.endsWith("java.lang.Integer")) { //处理integer
System.out.println(type.endsWith("java.lang.Integer"));
PropertyUtils.setProperty(object, field_name, Integer
.parseInt(element.getText()));
} else if (type.endsWith("java.util.Set")) {
Set set = new HashSet();//处理set
List<Element> e_list = element.elements();
for (Iterator iterator = e_list.iterator(); iterator.hasNext();) {
Element object2 = (Element) iterator.next();
generateBean(object2);
set.add(generateBean(object2));
PropertyUtils.setProperty(object, field_name, set);
}
}else if(type.startsWith(domain_package)){
if(getBeanById(element)!=null){
Class cls = Class.forName(domain_package_dot+element.getName());
PropertyUtils.setProperty(object, field_name.toLowerCase(), cls.cast(getBeanById(element)));
}
}
} catch (Exception e) {
log.error(domain_package_dot+element.getName()+"类不存在", e);
}
return object;
}
private static Object getBeanById(Element e) throws Exception {
Object object = null;
Node node = e.selectSingleNode("//id");
log.debug("没有找到属性"+e.getName()+"的id");
if(node!=null){
Integer id = Integer.parseInt(node.getText());
object = shiftService.getObjectById(Class.forName(domain_package_dot+e.getName()),id);
}
return object;
}
/**
* 生成最终xml,加上头
* @param args
*/
public static String beanToXml(Object object){
String xml = "<?xml version='1.0' encoding='UTF-8'?>"
+ generateXML(object);
log.debug("生成最终xml:"+xml);
return xml;
}
}