Sunday, September 14, 2014

Spring MVC Framework Global Layout Used To Be Template

In your xxxxx-servlet.xml you can extend the viewResolver viewClass with your own implementation (Download full source code)


<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
       xmlns:p="http://www.springframework.org/schema/p"
       xmlns:aop="http://www.springframework.org/schema/aop"
       xmlns:tx="http://www.springframework.org/schema/tx"
       xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-2.5.xsd
       http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-2.5.xsd
       http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-2.5.xsd">

    <bean class="org.springframework.web.servlet.mvc.support.ControllerClassNameHandlerMapping">
        <property name="caseSensitive" value="true" />
        <!--<property name="pathPrefix" value="/pathPrefix" />-->
    </bean>


    <bean class="com.pkm.controllers.UserController"/>
    
    <bean id="viewResolver"
     class="org.springframework.web.servlet.view.InternalResourceViewResolver" >
        <property name="prefix">
            <value>/WEB-INF/jsp/</value>
        </property>
        <property name="suffix">
            <value>.jsp</value>
        </property>
        <property name="viewClass">
            <value>com.pkm.common.JstlView</value>
        </property>
    </bean>

</beans>

JstlView.java

package com.pkm.common;

import java.util.Map;
import javax.servlet.RequestDispatcher;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.springframework.web.servlet.view.InternalResourceView;

public class JstlView extends InternalResourceView {
    @Override
    protected void renderMergedOutputModel(Map<String, Object> model, HttpServletRequest request, HttpServletResponse response) throws Exception {
        String dispatcherPath = prepareForRendering(request, response);
        if (model != null) {
            for (Map.Entry pairs : model.entrySet()) {
                String key = pairs.getKey().toString();
                Object value = pairs.getValue();
                request.setAttribute(key, value);
            }
        }

        // set original view being asked for as a request parameter
        request.setAttribute("_____CONTROLLER_VIEW_NAME_____", dispatcherPath);

        // force everything to be template.jsp
        RequestDispatcher rd = request.getRequestDispatcher("/WEB-INF/template.jsp");
        rd.include(request, response);
    }
}

template.jsp


<!doctype html>
<html lang="en">
<head>
    <title>Hello :: Spring Application</title>
</head>
<body>
    <header>
        <jsp:include page="header.jsp"/>
    </header>
    <jsp:include page="${_____CONTROLLER_VIEW_NAME_____}"/>    <footer>
        <jsp:include page="footer.jsp"/>
    </footer>
</body>
</html>

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