Define a new return type in struts2-return XML string and generate HTML with XSLT

1. define a new return type:

package com.yuxipacific.common.result;import java.io.StringReader;import javax.xml.parsers.DocumentBuilder;import javax.xml.parsers.DocumentBuilderFactory;import javax.xml.transform.Source;import org.apache.struts2.views.xslt.XSLTResult;import org.xml.sax.InputSource;public class StringXSLTResult extends XSLTResult {private static final long serialVersionUID = -5603306939538425896L;private boolean parseStringAsXML = true;public void setParseStringAsXML(boolean parseStringAsXML) {this.parseStringAsXML = parseStringAsXML;}@Overrideprotected Source getDOMSourceForStack(Object value) throws IllegalAccessException, InstantiationException {if(parseStringAsXML && value instanceof String) {try {DocumentBuilder builder = DocumentBuilderFactory.newInstance().newDocumentBuilder();value = builder.parse(new InputSource(new StringReader((String)value)));} catch (Exception e) {return super.getDOMSourceForStack(value);}}return super.getDOMSourceForStack(value);}}

2. Struts. xml declares the new return type and defines the action to be executed:

<!DOCTYPE struts PUBLIC"-//Apache Software Foundation//DTD Struts Configuration 2.0//EN""http://struts.apache.org/dtds/struts-2.1.dtd"><struts><constant name="struts.devMode" value="true" />    <constant name="struts.enable.DynamicMethodInvocation" value="false" />    <constant name="struts.i18n.encoding" value="UTF-8" />    <constant name="struts.custom.i18n.resources" value="ApplicationResources" />        <package name="default" namespace="/" extends="struts-default">    <result-types>    <result-type name="sxslt" class="com.yuxipacific.common.result.StringXSLTResult"></result-type>    </result-types><interceptors><interceptor name="cmInterceptor" class="com.yuxipacific.common.aop.CmInterceptor" /><interceptor-stack name="cmStack"><interceptor-ref name="cmInterceptor" /><interceptor-ref name="defaultStack"/></interceptor-stack></interceptors><default-interceptor-ref name="cmStack" /><action name="query" class="com.yuxipacific.action.QueryAction" method="query"><result name="success" type="sxslt"><param name="exposedValue">xmlString</param>                <param name="stylesheetLocation ">/xslt/result.xslt</param>                <param name="noCache">true</param></result></action>    </package></struts>

3. queryaction. Java

package com.yuxipacific.action;import com.yuxipacific.common.action.CmAction;public class QueryAction extends CmAction {private static final long serialVersionUID = 174546491330585634L;@Overridepublic void doBeforeProcess() throws Exception {System.out.println("------------------------1");}@Overridepublic void doAfterProcess() throws Exception {System.out.println("------------------------2");}public String query() {//String xmlString = "<user><name>Admin</name></user>";//Map<String, Object> contextMap = ActionContext.getContext().getContextMap();//contextMap.put("xmlString", xmlString);xmlString = "<user><name>Admin</name></user>";return SUCCESS;}private String xmlString;public String getXmlString() {return xmlString;}public void setXmlString(String xmlString) {this.xmlString = xmlString;}}

XSLT/result. XSLT:

<?xml version="1.0" encoding="UTF-8"?><xsl:stylesheet version="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform">    <xsl:output method="html" omit-xml-declaration="yes" />    <xsl:template match="/user">        <xsl:value-of select="name"/>    </xsl:template></xsl:stylesheet> 

For more information, see:

Http://unmi.cc/struts2-xslt-string-document-final

Http://unmi.cc/struts2-xsltresult-details

Http://eryk.iteye.com/blog/643946