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2016/05/03

[XStream] How to create XML via XStream

Requirement
If we would like to generate a xml file like this: 
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<doc>
  <regId>123456</regId>
  <ownerId>A123456789</ownerId>
  <policyNumber>TA800000001</policyNumber>
  <insuredId>B123456789</insuredId>
  <formId>A00123</formId>
</doc>

How to do it?
How-to
We can make good use of XStream to help us to implement this requirement easily.

 Add XStream dependency to your pom.xml 
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        <dependency>
            <groupId>com.thoughtworks.xstream</groupId>
            <artifactId>xstream</artifactId>
            <version>1.4.8</version>
        </dependency>


Step1. Create a simple class to correspond to xml tags. 
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package albert.practice.xstream.beans;

import java.io.Serializable;

import org.apache.commons.lang.builder.ToStringBuilder;
import org.apache.commons.lang.builder.ToStringStyle;

public class Doc implements Serializable {

 private static final long serialVersionUID = 1L;

 // 訂單編號
 private String regId;

 // 要保人ID
 private String ownerId;

 // 保單號碼
 private String policyNumber;

 // 被保人 ID
 private String insuredId;

 // 表單代碼
 private String formId;

 /**
  * Gets the reg id.
  * 
  * @return the reg id
  */
 public String getRegId() {
  return regId;
 }

 /**
  * Sets the reg id.
  * 
  * @param regId
  *            the new reg id
  */
 public void setRegId(String regId) {
  this.regId = regId;
 }

 /**
  * Gets the owner id.
  * 
  * @return the owner id
  */
 public String getOwnerId() {
  return ownerId;
 }

 /**
  * Sets the owner id.
  * 
  * @param ownerId
  *            the new owner id
  */
 public void setOwnerId(String ownerId) {
  this.ownerId = ownerId;
 }

 /**
  * Gets the policy number.
  * 
  * @return the policy number
  */
 public String getPolicyNumber() {
  return policyNumber;
 }

 /**
  * Sets the policy number.
  * 
  * @param policyNumber
  *            the new policy number
  */
 public void setPolicyNumber(String policyNumber) {
  this.policyNumber = policyNumber;
 }

 /**
  * Gets the insured id.
  * 
  * @return the insured id
  */
 public String getInsuredId() {
  return insuredId;
 }

 /**
  * Sets the insured id.
  * 
  * @param insuredId
  *            the new insured id
  */
 public void setInsuredId(String insuredId) {
  this.insuredId = insuredId;
 }

 /**
  * Gets the form id.
  * 
  * @return the form id
  */
 public String getFormId() {
  return formId;
 }

 /**
  * Sets the form id.
  * 
  * @param formId
  *            the new form id
  */
 public void setFormId(String formId) {
  this.formId = formId;
 }

 /**
  * {@inheritDoc}
  */
 @Override
 public String toString() {
  return ToStringBuilder.reflectionToString(this, ToStringStyle.MULTI_LINE_STYLE);
 }

}


Step2. Serialize object to XML via XStream API 
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package albert.practice.xstream;

import com.thoughtworks.xstream.XStream;

import albert.practice.xstream.beans.Doc;

public class XStreamTest2 {

 public static void main(String[] args) {

  // prepare bean for XML
  Doc doc = new Doc();
  doc.setRegId("123456");
  doc.setOwnerId("A123456789");
  doc.setPolicyNumber("TA800000001");
  doc.setInsuredId("B123456789");
  doc.setFormId("A00123");

  // Initializing XStream
  XStream xStream = new XStream();

  // create an alias called doc to the desired class (Doc)
  xStream.alias("doc", Doc.class);

  // Serializing an object to XML
  String xml = xStream.toXML(doc);

  // print XML
  System.out.println(xml);
 }

}


Reference
[1] http://x-stream.github.io/tutorial.html
Posted by Albert Kuo at 8:00 AM
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