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jaxb的解析xml和生成xml列子

解析XML文件:xml 文件如下：

<?xml version="1.0" encoding="UTF-8"?>

<trans>

<tran>

</tran>

<tran>

</tran>

</trans>
建立對(duì)應(yīng)的JAVA bean類

Trans.java類

package com.jaxb.test;

import java.util.List;

import javax.xml.bind.annotation.XmlAccessType;

import javax.xml.bind.annotation.XmlAccessorType;

import javax.xml.bind.annotation.XmlElement;

import javax.xml.bind.annotation.XmlRootElement;

@XmlRootElement(name = "trans")

@XmlAccessorType(XmlAccessType.FIELD)

public class Trans{

@XmlElement(name = "tran")

private List<Tran> data = null;

public List<Tran> getData() {

return data;

}

public void setData(List<Tran> data) {

this.data = data;

}

Tran.java類

package com.jaxb.test;

import javax.xml.bind.annotation.XmlAccessType;

import javax.xml.bind.annotation.XmlAccessorType;

import javax.xml.bind.annotation.XmlElement;

@XmlAccessorType(XmlAccessType.FIELD)

public class Tran {

@XmlElement(name = "requestId")

private Long requestId;

@XmlElement(name = "orderNo")

private Long orderNo;

@XmlElement(name = "returnCode")

private String returnCode;

@XmlElement(name = "returnInfo")

private String returnInfo;

public Long getRequestId() {

return requestId;

}

public void setRequestId(Long requestId) {

this.requestId = requestId;

}

public Long getOrderNo() {

return orderNo;

}

public void setOrderNo(Long orderNo) {

this.orderNo = orderNo;

}

public String getReturnCode() {

return returnCode;

}

public void setReturnCode(String returnCode) {

this.returnCode = returnCode;

}

public String getReturnInfo() {

return returnInfo;

}

public void setReturnInfo(String returnInfo) {

this.returnInfo = returnInfo;

}

建立測(cè)試類

import java.io.File;

import java.util.ArrayList;

import java.util.List;

import javax.xml.bind.JAXBContext;

import javax.xml.bind.JAXBException;

import javax.xml.bind.Marshaller;

import javax.xml.bind.Unmarshaller;

public class TestJAXB {

public static void main(String[] args) {

try {

//read xml file to Java object

Trans trans = TestJAXB.readString(Trans.class,"input.xml");

List<Tran> datas = trans.getDatas();

for (Tran o : datas) {

System.out.println(o.getReturnCode()+";"+o.getReturnInfo());

}

//write java object to xml

Tran tran = new Tran();

tran.setOrderNo(11111L);

tran.setRequestId(22222L);

tran.setReturnCode("0000");

tran.setReturnInfo("success");

Tran tran2 = new Tran();

tran2.setOrderNo(33333L);

tran2.setRequestId(44444L);

tran2.setReturnCode("0001");

tran2.setReturnInfo("failure");

Trans trxs = new Trans();

List<Tran> list = new ArrayList<Tran>();

list.add(tran);

list.add(tran2);

trxs.setDatas(list);

File file = new File("D:/output.xml");

JAXBContext jaxbContext = JAXBContext.newInstance(Trans.class);

Marshaller jaxbMarshaller = jaxbContext.createMarshaller();

// output pretty printed

jaxbMarshaller.setProperty(Marshaller.JAXB_FORMATTED_OUTPUT, true);

jaxbMarshaller.marshal(trxs, file);

jaxbMarshaller.marshal(trxs, System.out);

} catch (JAXBException e) {

e.printStackTrace();

}

@SuppressWarnings("unchecked")

public static <T> T readString(Class<T> clazz, String context) throws JAXBException {

try {

JAXBContext jc = JAXBContext.newInstance(clazz);

Unmarshaller u = jc.createUnmarshaller();

return (T) u.unmarshal(new File(context));