java利用反射解析xml到实体类

定义一个Handler，处理sax解析

package com.jb.f1.scd.service.impl;import java.lang.reflect.Field;import java.util.LinkedList;import java.util.List;import org.xml.sax.Attributes;import org.xml.sax.SAXException;import org.xml.sax.helpers.DefaultHandler;public class ScdServiceHandler extends DefaultHandler {String currentTag = null;String currentValue = null;String nodeName = null;Object object = null;Class<?> objClas = null;List<Object> list = null;public ScdServiceHandler(String nodeName) {this.nodeName = nodeName;}public List<Object> getList() {return list;}@Overridepublic void startDocument() {list = new LinkedList<Object>();try {//objClas =  Class.forName(this.getClass().getPackage().getName() + "."+ nodeName);objClas =  Class.forName("com.jb.f1.scd.model.TB_SCD_" + nodeName);} catch (ClassNotFoundException e) {e.printStackTrace();}}@Overridepublic void startElement(String uri, String localName, String qName,Attributes attributes) {if (qName.equals(nodeName)) {try {object = objClas.newInstance();} catch (Exception e) {e.printStackTrace();}if (attributes != null && object != null) {for (int i = 0; i < attributes.getLength(); i++) {try {setField(attributes.getQName(i), attributes.getValue(i));} catch (Exception e) {e.printStackTrace();}}}}currentTag = qName;}private void setField(String qName, String value) throws Exception {Class<?> cls = object.getClass();Field[] fields = cls.getDeclaredFields();for (int i = 0; i < fields.length; i++) {Field f = fields[i];if(!f.getName().equalsIgnoreCase(qName)){continue;}f.setAccessible(true);String type = f.getType().toString();if (type.endsWith("String")) {f.set(object, value);} else {System.out.println("暂时不支持非String类型");}}}@Overridepublic void characters(char[] ch, int start, int length)throws SAXException {// TODO Auto-generated method stub// if (currentTag != null && map != null) {// currentValue = new String(ch, start, length);// if (currentValue != null && !currentValue.trim().equals("")// && !currentValue.trim().equals("\n")) {// // map.put(currentTag, currentValue);// }currentTag = null;currentValue = null;// }}@Overridepublic void endElement(String uri, String localName, String qName)throws SAXException {if (qName.equals(nodeName)) {list.add(object);object = null;}}@Overridepublic void endDocument() throws SAXException {super.endDocument();}}

2、定义一个serviceImpl

package com.jb.f1.scd.service.impl;import java.io.InputStream;import java.util.List;import javax.annotation.Resource;import javax.xml.parsers.SAXParser;import javax.xml.parsers.SAXParserFactory;import org.springframework.stereotype.Service;import com.jb.dao.GenericDao;import com.jb.f1.scd.model.TB_SCD_IED;import com.jb.f1.scd.service.ScdSerivce;import com.jb.ui.service.EntityOperationServiceAdapter;/** * @author leipan * */@Service("scdServiceImpl")public class ScdServiceImpl extends EntityOperationServiceAdapter<TB_SCD_IED>implements ScdSerivce {@Resource(name = "genericDao")protected GenericDao genericDao;/** * 通过文件路径的方式解析文件 * uri： 文件路径 * nodeName：节点名称 */@Overridepublic List<Object> readSCD(String uri, String NodeName) {try {SAXParserFactory parserFactory = SAXParserFactory.newInstance();SAXParser parser = parserFactory.newSAXParser();ScdServiceHandler myhandler = new ScdServiceHandler(NodeName);parser.parse(uri, myhandler);return myhandler.getList();} catch (Exception e) {e.printStackTrace();}return null;}/** * 通过文件流的方式解析文件 * @param in：文件输入流 * @param NodeName：节点名称 * @return */public List<Object> readSCD(InputStream in, String NodeName) {try {SAXParserFactory parserFactory = SAXParserFactory.newInstance();SAXParser parser = parserFactory.newSAXParser();ScdServiceHandler myhandler = new ScdServiceHandler(NodeName);parser.parse(in, myhandler);return myhandler.getList();} catch (Exception e) {e.printStackTrace();}return null;}/** * 将解析的节点对象持久化到数据库中 */@Overridepublic String saveSCDIED(List<Object> arg0) {for (Object obj : arg0) {if (obj instanceof TB_SCD_IED) {genericDao.savePo((TB_SCD_IED) obj);}}return null;}@Overridepublic String[] getZBGUID() {String sql = "select guid from us_sys.tb_file_zb";genericDao.exeSql(sql);return null;}}

3、增加测试类

public static void main(String[] args) throws FileNotFoundException {ScdServiceImpl s = new ScdServiceImpl();long time = System.currentTimeMillis();InputStream in = new FileInputStream("E:\\scd\\1.scd");List<Object> list = s.readSCD(in, "IED");System.out.println(System.currentTimeMillis() - time);for (int i = 0; i < list.size(); i++) {System.out.println("(" + (i + 1) + ")" + list.get(i));}}

4、定义一个实体类，用于将解析的节点对应到Model中。

package com.jb.f1.scd.model;import com.jb.model.PersistClass;@SuppressWarnings("serial")public class TB_SCD_IED extends PersistClass {private String name;private String type;private String desc;private String manufacturer;private String configVersion;public String getName() {return name;}public void setName(String name) {this.name = name;}public String getType() {return type;}public void setType(String type) {this.type = type;}public String getDesc() {return desc;}public void setDesc(String desc) {this.desc = desc;}public String getManufacturer() {return manufacturer;}public void setManufacturer(String manufacturer) {this.manufacturer = manufacturer;}public String getConfigVersion() {return configVersion;}public void setConfigVersion(String configVersion) {this.configVersion = configVersion;}@Overridepublic String toString() {return "IED [name=" + name + ", type=" + type + ", desc=" + desc+ ", manufacturer=" + manufacturer + ", configVersion="+ configVersion + "]";}}