在Spring MVC Rest中处理JSon时如何处理POJO嵌套对象

2 回答

• 0

  如果我理解正确，你可以做这样的事情（我正在使用Spring 3.2.3.RELEASE＆Jackson 1.9.12） .

  在您的applicationContext.xml中，您有：

  <bean id="jacksonMessageConverter"
            class="org.springframework.http.converter.json.MappingJacksonHttpMessageConverter"/>
  
      <bean class="org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter">
          <property name="messageConverters">
              <list>
                  <ref bean="jacksonMessageConverter"/>
              </list>
          </property>
      </bean>
  

  你有Spring控制器，如下所示：

  package test;
  
  import org.apache.log4j.Logger;
  import org.springframework.stereotype.Controller;
  import org.springframework.web.bind.annotation.RequestBody;
  import org.springframework.web.bind.annotation.RequestMapping;
  import org.springframework.web.bind.annotation.RequestMethod;
  import org.springframework.web.bind.annotation.ResponseBody;
  
  @Controller
  @RequestMapping("/json")
  public class JsonParsingController {
      private final static Logger log = Logger.getLogger(JsonParsingController.class);
  
      @RequestMapping(value = "/cart.do", method = RequestMethod.POST, produces = "application/json; charset=utf-8")
  @ResponseBody public CartResponse handleCart(@RequestBody Cart cart) {
      if (cart != null) {
          log.debug(cart);
      }
  
      return new CartResponse("OK!");
  }
  }
  

  和三个POJO：

  package test;
  
  public class Cart {
      private String id;
      private Checkout checkoutID;
  
      public String getId() {
          return id;
      }
  
      public void setId(String id) {
          this.id = id;
      }
  
      public Checkout getCheckoutID() {
          return checkoutID;
      }
  
      public void setCheckoutID(Checkout checkoutID) {
          this.checkoutID = checkoutID;
      }
  
      @Override
      public String toString() {
          return "Cart{" +
                  "id='" + id + '\'' +
                  ", checkoutID=" + checkoutID +
                  '}';
      }
  }
  
  package test;
  
  public class Checkout {
      private String id;
      private String billingAddress;
      private String shippingAddress;
  
      public String getId() {
          return id;
      }
  
      public void setId(String id) {
          this.id = id;
      }
  
      public String getBillingAddress() {
          return billingAddress;
      }
  
      public void setBillingAddress(String billingAddress) {
          this.billingAddress = billingAddress;
      }
  
      public String getShippingAddress() {
          return shippingAddress;
      }
  
      public void setShippingAddress(String shippingAddress) {
          this.shippingAddress = shippingAddress;
      }
  
      @Override
      public String toString() {
          return "Checkout{" +
                  "id='" + id + '\'' +
                  ", billingAddress='" + billingAddress + '\'' +
                  ", shippingAddress='" + shippingAddress + '\'' +
                  '}';
      }
  }
  
  package test;
  
  public class CartResponse {
      private String result;
  
      public CartResponse(String result) {
          this.result = result;
      }
  
      public String getResult() {
          return result;
      }
  
      public void setResult(String result) {
          this.result = result;
      }
  }
  

  然后在您的HTML页面中，您可以执行以下操作：

  <script language="JavaScript" type="text/javascript">
      $(document).ready(function () {
          // Your data
          var arr = {
                      id: '51f631cb84812abb04000006',
                      checkoutID: {
                          id: '123456789',
                          "shippingAddress" : "5h avenue - new york",
                          "billingAddress" : "5h avenue - new york"
                      }
                    };
          $.ajax({
              url: '/json/cart.do',
              type: 'POST',
              data: JSON.stringify(arr),
              contentType: 'application/json; charset=utf-8',
              dataType: 'json',
              async: false,
              success: function (msg) {
                  alert(msg.result);
              }
          });
      });
  </script>
  

  至少对我来说 - 它有效:)

  回复于 2024-04-30T11:06:53+08:00
• 5

  它足以返回控制器文件中的数据结构（模型） . JSON将根据模型中的结构自动生成 . 看看这里例如：http://www.mkyong.com/spring-mvc/spring-3-mvc-and-json-example/（第3节 - 控制器，然后，5 - 结果）

  回复于 2024-04-30T11:06:53+08:00