Spring MVC的@ResponseBody返回JSON串
Xml代码
<bean class ="org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter" >
<property name="messageConverters">
<list>
<ref bean="mappingJacksonHttpMessageConverter" /><!-- json转换器 -->
</list>
</property>
</bean>
<bean id="mappingJacksonHttpMessageConverter" />

<bean class ="org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter" >
<property name="messageConverters">
<list>
<ref bean="mappingJacksonHttpMessageConverter" /><!-- json转换器 -->
</list>
</property>
</bean>
<bean id="mappingJacksonHttpMessageConverter" />

需要以下两个jar包：

Xml代码
<dependency org="org.codehaus.jackson" name="jackson-core-asl" rev="1.5.5" conf="runtime->default" />
<dependency org="org.codehaus.jackson" name="jackson-mapper-asl" rev="1.5.5" conf="runtime->default" />

<dependency org="org.codehaus.jackson" name="jackson-core-asl" rev="1.5.5" conf="runtime->default" />
<dependency org="org.codehaus.jackson" name="jackson-mapper-asl" rev="1.5.5" conf="runtime->default" />



Java代码
@RequestMapping(value="/nogood", method=RequestMethod.GET)
public @ResponseBody CmUser execute(String userid) {
CmUser u = new CmUser();
u.setAge(16);
u.setName("测试用户");
return u;
}