jaxb解析xml工具类

[quote]jaxb jdk 自带的解析xml的一种方式支持，只需要用注解对javabean进行数据绑定[/quote]

package com.nnk.flowrecharge.common;

import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;

import javax.xml.bind.JAXBContext;
import javax.xml.bind.JAXBException;
import javax.xml.bind.Marshaller;
import javax.xml.bind.Unmarshaller;

import com.nnk.flowrecharge.config.SystemConfig;

public class XmlUtil {

	private static String DEFAULT_CHARSET = SystemConfig.DEFAULT_CHARSET;

	public static String toXml(Object model) throws JAXBException, IOException {
		ByteArrayOutputStream output = new ByteArrayOutputStream(1024);
		marshal(model, output);
		output.flush();
		return new String(output.toByteArray(), DEFAULT_CHARSET);
	}
	public static String toXml(Object model,boolean isFormatOut) throws JAXBException, IOException {
		ByteArrayOutputStream output = new ByteArrayOutputStream(1024);
		marshal(model, output,isFormatOut);
		output.flush();
		return new String(output.toByteArray(), DEFAULT_CHARSET);
	}
	public static void marshal(Object model, OutputStream output) throws JAXBException {
		JAXBContext jaxbContext = JAXBContext.newInstance(model.getClass());
		Marshaller jaxbMarshaller = jaxbContext.createMarshaller();
		jaxbMarshaller.setProperty(Marshaller.JAXB_FORMATTED_OUTPUT, true);
		jaxbMarshaller.setProperty(Marshaller.JAXB_ENCODING, DEFAULT_CHARSET);
		jaxbMarshaller.marshal(model, output);
	}
	public static void marshal(Object model, OutputStream output,boolean isFormatOut) throws JAXBException {
		JAXBContext jaxbContext = JAXBContext.newInstance(model.getClass());
		Marshaller jaxbMarshaller = jaxbContext.createMarshaller();
		jaxbMarshaller.setProperty(Marshaller.JAXB_FORMATTED_OUTPUT, isFormatOut);
		jaxbMarshaller.setProperty(Marshaller.JAXB_ENCODING, DEFAULT_CHARSET);
		jaxbMarshaller.marshal(model, output);
	}

	public static <T> T parseXml(Class<T> clazz, String xml) throws JAXBException, IOException {
		byte[] buf = xml.getBytes(DEFAULT_CHARSET);
		ByteArrayInputStream input = new ByteArrayInputStream(buf, 0, buf.length);
		return unmarshal(clazz, input);
	}

	@SuppressWarnings("unchecked")
	public static <T> T unmarshal(Class<T> clazz, InputStream input) throws JAXBException {
		JAXBContext jaxbContext = JAXBContext.newInstance(clazz);
		Unmarshaller jaxbUnmarshaller = jaxbContext.createUnmarshaller();
		return (T) jaxbUnmarshaller.unmarshal(input);
	}

	public static void saveXmlToFile(Object model, String filename) throws FileNotFoundException, JAXBException {
		FileOutputStream fos = new FileOutputStream(filename);
		marshal(model, fos);
	}

	public static void saveXmlToFile(Object model, File file) throws FileNotFoundException, JAXBException {
		FileOutputStream fos = new FileOutputStream(file);
		marshal(model, fos);
	}

	public static <T> T loadXmlFromFile(Class<T> clazz, String filename) throws FileNotFoundException, JAXBException {
		return unmarshal(clazz, new FileInputStream(filename));
	}

	public static <T> T loadXmlFromFile(Class<T> clazz, File file) throws FileNotFoundException, JAXBException {
		return unmarshal(clazz, new FileInputStream(file));
	}

	public static <T> T loadXmlFromFile(Class<T> clazz, InputStream is) throws JAXBException {
		return unmarshal(clazz, is);
	}
}

[quote]
动态生成xml 的javabean
[/quote]

package com.nnk.flowrecharge.config;

import javax.xml.bind.annotation.XmlAccessType;
import javax.xml.bind.annotation.XmlAccessorType;
import javax.xml.bind.annotation.XmlAttribute;

@XmlAccessorType(XmlAccessType.NONE)
public class CodeConfig {

	@XmlAttribute
	private String key = "";
	@XmlAttribute
	private String text = "";
	@XmlAttribute
	private String value = "";

	public String getKey() {
		return key;
	}

	public void setKey(String key) {
		this.key = key;
	}

	public String getText() {
		return text;
	}

	public void setText(String text) {
		this.text = text;
	}

	public String getValue() {
		return value;
	}

	public void setValue(String value) {
		this.value = value;
	}

}

[quote]
package com.nnk.flowrecharge.config;

import java.io.FileNotFoundException;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

import javax.xml.bind.JAXBException;
import javax.xml.bind.annotation.XmlAccessType;
import javax.xml.bind.annotation.XmlAccessorType;
import javax.xml.bind.annotation.XmlElement;
import javax.xml.bind.annotation.XmlElementWrapper;
import javax.xml.bind.annotation.XmlRootElement;

import com.nnk.msgsrv.client.common.XmlUtil;

@XmlRootElement(name = "root")
@XmlAccessorType(XmlAccessType.NONE)
public class InterfaceConfig {

@XmlElement(name = "recharge")
private Recharge recharge = new Recharge();
@XmlElement(name = "query")
private Query query = new Query();
@XmlElement(name = "global")
private Global global = new Global();

public static Map<String, CodeConfig> getRechargecodes() {
return rechargecodes;
}
public Global getGlobal() {
return global;
}
public static Map<String, Prama> getPramas() {
return Pramas;
}
public static void setPramas(Map<String, Prama> Pramas) {
InterfaceConfig.Pramas = Pramas;
}
private static InterfaceConfig instance = null;

private static Map<String, CodeConfig> rechargecodes = new HashMap<String, CodeConfig>();
private static Map<String, CodeConfig> queryCodes = new HashMap<String, CodeConfig>();
private static Map<String, Prama> Pramas = new HashMap<String, Prama>();
public Recharge getRecharge() {
return recharge;
}

public Query getQuery() {
return query;
}
public static Map<String, CodeConfig> getQueryCodes() {
return queryCodes;
}
public static synchronized InterfaceConfig getInstance() {
if (instance == null) {
try {
instance = XmlUtil.loadXmlFromFile(InterfaceConfig.class, "config/interface.xml");

rechargecodes.clear();
List<CodeConfig> _codes = instance.getRecharge().getCodes();
for (CodeConfig cc : _codes) {
rechargecodes.put(cc.getKey(), cc);
}
queryCodes.clear();
_codes = instance.getQuery().getCodes();
for (CodeConfig cc : _codes) {
queryCodes.put(cc.getKey(), cc);
}

Pramas.clear();
List<Prama> _pramas = instance.getGlobal().getPramas();
for (Prama cc : _pramas) {
Pramas.put(cc.getKey(), cc);
}
} catch (FileNotFoundException e) {
throw new RuntimeException(e);
} catch (JAXBException e) {
throw new RuntimeException(e);
}
}
return instance;
}
}

@XmlAccessorType(XmlAccessType.NONE)
class Recharge {

@XmlElement(name = "code")
@XmlElementWrapper(name = "codes")
private List<CodeConfig> codes = new ArrayList<CodeConfig>();

public List<CodeConfig> getCodes() {
return codes;
}

public void setCodes(List<CodeConfig> codes) {
this.codes = codes;
}

}
@XmlAccessorType(XmlAccessType.NONE)
class Query
{
@XmlElement(name = "code")
@XmlElementWrapper(name = "codes")
private List<CodeConfig> codes = new ArrayList<CodeConfig>();
public List<CodeConfig> getCodes() {
return codes;
}
public void setCodes(List<CodeConfig> codes) {
this.codes = codes;
}
}
@XmlAccessorType(XmlAccessType.NONE)
class Global{
@XmlElement(name = "prama")
@XmlElementWrapper(name = "pramas")
private List<Prama> Pramas = new ArrayList<Prama>();

public List<Prama> getPramas() {
return Pramas;
}

public void setPramas(List<Prama> Pramas) {
this.Pramas = Pramas;
}
}[/quote]
[quote]
@XmlAttribute 表示属性节点绑定 @XmlRootElement 根节点 @XmlAccessorType xml接触类型，XmlAccessType.NONE表示没有注解标注的不进行动态绑定 XmlAccessType.Filed 表示javabean属性字段都进行绑定，无需再加注解
@XmlElement表示节点绑定
[/quote]