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  • Spring 3 MVC And XML Example

    In Spring 3, one of the feature of “mvc:annotation-driven“, is support for convert object to/from XML file, if JAXB is in project classpath.

    In this tutorial, we show you how to convert a return object into XML format and return it back to user via Spring @MVC framework.

    Technologies used :

    1. Spring 3.0.5.RELEASE
    2. JDK 1.6
    3. Eclipse 3.6
    4. Maven 3
    JAXB in JDK6
    JAXB is included in JDK6, so, you do not need to include JAXB library manually, as long as object is annotated with JAXB annotation, Spring will convert it into XML format automatically.

    2. Model + JAXB

    A simple POJO model and annotated with JAXB annotation, later convert this object into XML output.

    package com.mkyong.common.model;
     
    import javax.xml.bind.annotation.XmlElement;
    import javax.xml.bind.annotation.XmlRootElement;
     
    @XmlRootElement(name = "coffee")
    public class Coffee {
     
        String name;
        int quanlity;
     
        public String getName() {
            return name;
        }
     
        @XmlElement
        public void setName(String name) {
            this.name = name;
        }
     
        public int getQuanlity() {
            return quanlity;
        }
     
        @XmlElement
        public void setQuanlity(int quanlity) {
            this.quanlity = quanlity;
        }
     
        public Coffee(String name, int quanlity) {
            this.name = name;
            this.quanlity = quanlity;
        }
     
        public Coffee() {
        }
     

    3. Controller

    Add “@ResponseBody” in the method return value, no much detail in the Spring documentation.

    As i know, when Spring see

    1. Object annotated with JAXB
    2. JAXB library existed in classpath
    3. “mvc:annotation-driven” is enabled
    4. Return method annotated with @ResponseBody

    It will handle the conversion automatically.

     package com.mkyong.common.controller;

     
    import org.springframework.stereotype.Controller;
    import org.springframework.web.bind.annotation.PathVariable;
    import org.springframework.web.bind.annotation.RequestMapping;
    import org.springframework.web.bind.annotation.RequestMethod;
    import org.springframework.web.bind.annotation.ResponseBody;
    import com.mkyong.common.model.Coffee;
     
    @Controller
    @RequestMapping("/coffee")
    public class XMLController {
     
        @RequestMapping(value="{name}", method = RequestMethod.GET)
        public @ResponseBody Coffee getCoffeeInXML(@PathVariable String name) {
     
            Coffee coffee = new Coffee(name, 100);
     
            return coffee;
     
        }
     
    }

    4. mvc:annotation-driven

    In one of your Spring configuration XML file, enable “mvc:annotation-driven“.

    <beans xmlns="http://www.springframework.org/schema/beans"
        xmlns:context
    ="http://www.springframework.org/schema/context"
        xmlns:mvc
    ="http://www.springframework.org/schema/mvc" 
        xmlns:xsi
    ="http://www.w3.org/2001/XMLSchema-instance"
        xsi:schemaLocation
    ="
            http://www.springframework.org/schema/beans     
            http://www.springframework.org/schema/beans/spring-beans-3.0.xsd
            http://www.springframework.org/schema/context 
            http://www.springframework.org/schema/context/spring-context-3.0.xsd
            http://www.springframework.org/schema/mvc
            http://www.springframework.org/schema/mvc/spring-mvc-3.0.xsd"
    >
     
        <context:component-scan base-package="com.mkyong.common.controller" />
     
        <mvc:annotation-driven />
     

    </beans> 

    Note

    Alternatively, you can declares “spring-oxm.jar” dependency and include following MarshallingView, to handle the conversion. With this method, you don’t need annotate @ResponseBody in your method.

    <beans ...>
        <bean class="org.springframework.web.servlet.view.BeanNameViewResolver" />
     
        <bean id="xmlViewer" 
            class
    ="org.springframework.web.servlet.view.xml.MarshallingView">
            <constructor-arg>
              <bean class="org.springframework.oxm.jaxb.Jaxb2Marshaller">
                <property name="classesToBeBound">
                    <list>
                        <value>com.mkyong.common.model.Coffee</value>
                    </list>
                </property>
              </bean>
            </constructor-arg>
        </bean>

    </beans> 

    5. Demo

    URL : http://localhost:8080/SpringMVC/rest/coffee/arabica

    spring mvc and xml example demo

    Download Source Code

    Download it – SpringMVC-XML-Example.zip (7 KB)
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  • 原文地址:https://www.cnblogs.com/chenying99/p/2783718.html
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