通过json格式返回服务器对象

注解@ResponseBody

修改servlet-spring.xml

<bean class="org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter">      <property name="messageConverters">          <list>              <bean class="org.springframework.http.converter.json.MappingJackson2HttpMessageConverter">                  <property name="supportedMediaTypes">                      <list>                          <value>text/html; charset=UTF-8</value>                          <value>application/json;charset=UTF-8</value>                      </list>                  </property>              </bean>          </list>      </property>  </bean>