Xml格式输入
Spring mvc中缺省提供了SourceHttpMessageConverter 和 Jaxb2RootElementHttpMessageConverter,可用来解析request body中输入的xml string。
其中 SourceHttpMessageConverter 将输入的xmlString 转换成xml的Source对象(如DomSource,SaxSource等),再在handlerMethod对输入的Source对象进行后续解析。
例如
@RequestMapping("/xml2.xml")
public BeanJaxbA testXML2(@RequestBody DOMSource a){
try {
StringWriter writer = new StringWriter();
StreamResult result = new StreamResult(writer);
TransformerFactory tf = TransformerFactory.newInstance();
Transformer transformer = tf.newTransformer();
transformer.transform(a, result);
System.out.println(writer.toString()) ;
} catch (TransformerConfigurationException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (TransformerFactoryConfigurationError e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (TransformerException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
而Jaxb2RootElementHttpMessageConverter则通过JAXBinger机制将输入的xmlString直接转换成POJO对象。
例如
先定义带JAXB annotation的pojo bean
@XmlRootElement(name="xmlStrA")
public class BeanJaxbA {
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public String getPassword() {
return password;
}
public void setPassword(String password) {
this.password = password;
}
public long getId() {
return id;
}
public void setId(long id) {
this.id = id;
}
private String name;
private String password;
private long id;
}
在定义handler method如下
@RequestMapping("/xml.xml")
public BeanJaxbA testXML1(@RequestBody BeanJaxbA a){
BeanJaxbA a1 = new BeanJaxbA();
a1.setId(2000);
a1.setName("winzip");
a1.setPassword("password");
return a1;
}
这里spring mvc直接将输入的xml string 转换成为 BeanJaxA这个bean对象。
Xml格式输出
对于xml输出,Spring mvc提供了MarshallingView来提供对xml输出的支持。例如,在servlet context xml配置文件中增加如下配置。
<bean
class="org.springframework.web.servlet.view.ContentNegotiatingViewResolver">
<property name="order" value="1" />
<property name="mediaTypes">
<map>
<entry key="json" value="application/json" />
<entry key="xml" value="application/xml" /> <!-- SPR-7504 -->
</map>
</property>
<property name="defaultViews">
<list>
<bean class="net.zhepu.json.MappingJacksonJsonView" />
<bean name="jaxb2MarshallingView"
class="org.springframework.web.servlet.view.xml.MarshallingView">
<property name="marshaller" ref="jaxbMarshall"></property>
</bean>
</list>
</property>
<property name="ignoreAcceptHeader" value="true" />
</bean>
<oxm:jaxb2-marshaller id="jaxbMarshall">
<oxm:class-to-be-bound name="net.zhepu.web.xmlModel.BeanJaxbA" />
</oxm:jaxb2-marshaller>
以上定义使用jaxbMarshall来将java bean 转换为xml string并利用ContentNegotiatingViewResolver来提供输出。
可访问测试工程中http://localhost:8080/springmvc/中新增的
“xml input jaxb test” 和 “xml input domsource test2”两个按钮来查看xml 数据输入输出的效果。