SpringMVC由於級聯導致查詢結果重複

原創 进击的乌龟 2020-06-28 08:22
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  1. 2011-12-22 11:15:58 org.apache.catalina.core.StandardWrapperValve invoke  
  2. 嚴重: Servlet.service() for servlet spring threw exception  
  3. org.codehaus.jackson.map.JsonMappingException: Infinite recursion (StackOverflowError) (through reference chain: com.blog.pojo.Album["photos"]->org.hibernate.collection.PersistentBag[0]->com.blog.pojo.Photo["album"]->com.blog.pojo.Album["photos"]->org.hibernate.collection.PersistentBag[0]->com.blog.pojo.Photo["album"]->com.blog.pojo.Album["photos"]->org.hibernate.collection.PersistentBag[0]->com.blog.pojo.Photo["album"]->com.blog.pojo.Album["photos"]->org.hibernate.collection.PersistentBag[0]->com.blog.pojo.Photo["album"]->com.blog.pojo.Album["photos"]->org.hibernate.collection.PersistentBag[0]->com.blog.pojo.Photo["album"]->com.blog.pojo.Album["photos"]->org.hibernate.collection.PersistentBag[0]->com.blog.pojo.Photo["album"]->com.blog.pojo.Album["photos"]->org.hibernate.collection.PersistentBag[0]->com.blog.pojo.Photo["album"]->com.blog.pojo.Album["photos"]->org.hibernate.collection.PersistentBag[0]->com.blog.pojo.Photo["album"]->com.blog.pojo.Album["photos"]->org.hibernate.collection.PersistentBag[0]->com.blog.pojo.Photo["album"]->com.blog.pojo.Album["photos"]->org.hibernate.collection.PersistentBag[0]->com.blog.pojo.Photo["album"]->com.blog.pojo.Album["photos"]->org.hibernate.collection.PersistentBag[0]->com.blog.pojo.Photo["album"]->com.blog.pojo.Album["photos"]->org.hibernate.collection.PersistentBag[0]->com.blog.pojo.Photo["album"]->com.blog.pojo.Album["photos"]->org.hibernate.collection.PersistentBag[0]->com.blog.pojo.Photo["album"]->com.blog.pojo.Album["photos"]->org.hibernate.collection.PersistentBag[0]->com.blog.pojo.Photo["album"]->com.blog.pojo.Album["photos"])  
  4.     at org.codehaus.jackson.map.ser.BeanSerializer.serializeFields(BeanSerializer.java:189)  
  5.     at org.codehaus.jackson.map.ser.BeanSerializer.serialize(BeanSerializer.java:142)  
  6.     at org.codehaus.jackson.map.ser.BeanPropertyWriter.serializeAsField(BeanPropertyWriter.java:428)  
  7.     at org.codehaus.jackson.map.ser.BeanSerializer.serializeFields(BeanSerializer.java:175)  
  8.     at org.codehaus.jackson.map.ser.BeanSerializer.serialize(BeanSerializer.java:142)  
  9.     at org.codehaus.jackson.map.ser.ContainerSerializers$CollectionSerializer.serializeContents(ContainerSerializers.java:442)  
  10.     at org.codehaus.jackson.map.ser.ContainerSerializers$CollectionSerializer.serializeContents(ContainerSerializers.java:383)  
  11.     at org.codehaus.jackson.map.ser.ContainerSerializers$AsArraySerializer.serialize(ContainerSerializers.java:142)  
  12.     at org.codehaus.jackson.map.ser.BeanPropertyWriter.serializeAsField(BeanPropertyWriter.java:428)  
  13.     at org.codehaus.jackson.map.ser.BeanSerializer.serializeFields(BeanSerializer.java:175)  
  14.     at org.codehaus.jackson.map.ser.BeanSerializer.serialize(BeanSerializer.java:142)  
  15.     at org.codehaus.jackson.map.ser.BeanPropertyWriter.serializeAsField(BeanPropertyWriter.java:428)  
  16.     at org.codehaus.jackson.map.ser.BeanSerializer.serializeFields(BeanSerializer.java:175)  
  17.     at org.codehaus.jackson.map.ser.BeanSerializer.serialize(BeanSerializer.java:142)  
  18.     at org.codehaus.jackson.map.ser.ContainerSerializers$CollectionSerializer.serializeContents(ContainerSerializers.java:442)  
  19.     at org.codehaus.jackson.map.ser.ContainerSerializers$CollectionSerializer.serializeContents(ContainerSerializers.java:383)  
  20.     at org.codehaus.jackson.map.ser.ContainerSerializers$AsArraySerializer.serialize(ContainerSerializers.java:142)  
  21.     at org.codehaus.jackson.map.ser.BeanPropertyWriter.serializeAsField(BeanPropertyWriter.java:428)  
  22.     at org.codehaus.jackson.map.ser.BeanSerializer.serializeFields(BeanSerializer.java:175)  
  23.     at org.codehaus.jackson.map.ser.BeanSerializer.serialize(BeanSerializer.java:142)  
  24.     at org.codehaus.jackson.map.ser.BeanPropertyWriter.serializeAsField(BeanPropertyWriter.java:428)  
  25.     at org.codehaus.jackson.map.ser.BeanSerializer.serializeFields(BeanSerializer.java:175)  
  26.     at org.codehaus.jackson.map.ser.BeanSerializer.serialize(BeanSerializer.java:142)  
  27.     at org.codehaus.jackson.map.ser.ContainerSerializers$CollectionSerializer.serializeContents(ContainerSerializers.java:442)  
  28.     at org.codehaus.jackson.map.ser.ContainerSerializers$CollectionSerializer.serializeContents(ContainerSerializers.java:383)  
  29.     at org.codehaus.jackson.map.ser.ContainerSerializers$AsArraySerializer.serialize(ContainerSerializers.java:142)  
  30.     at org.codehaus.jackson.map.ser.BeanPropertyWriter.serializeAsField(BeanPropertyWriter.java:428)  
  31.     at org.codehaus.jackson.map.ser.BeanSerializer.serializeFields(BeanSerializer.java:175)  
  32.     at org.codehaus.jackson.map.ser.BeanSerializer.serialize(BeanSerializer.java:142)  
  33.     at org.codehaus.jackson.map.ser.BeanPropertyWriter.serializeAsField(BeanPropertyWriter.java:428)  
  34.     at org.codehaus.jackson.map.ser.BeanSerializer.serializeFields(BeanSerializer.java:175)  
  35.     at org.codehaus.jackson.map.ser.BeanSerializer.serialize(BeanSerializer.java:142)  
  36.     at org.codehaus.jackson.map.ser.ContainerSerializers$CollectionSerializer.serializeContents(ContainerSerializers.java:442)  
  37.     at org.codehaus.jackson.map.ser.ContainerSerializers$CollectionSerializer.serializeContents(ContainerSerializers.java:383)  
  38.     at org.codehaus.jackson.map.ser.ContainerSerializers$AsArraySerializer.serialize(ContainerSerializers.java:142)  
  39.     at org.codehaus.jackson.map.ser.BeanPropertyWriter.serializeAsField(BeanPropertyWriter.java:428)  
  40.     at org.codehaus.jackson.map.ser.BeanSerializer.serializeFields(BeanSerializer.java:175)  
  41.     at org.codehaus.jackson.map.ser.BeanSerializer.serialize(BeanSerializer.java:142)  
  42.     at org.codehaus.jackson.map.ser.BeanPropertyWriter.serializeAsField(BeanPropertyWriter.java:428)  
  43.     at org.codehaus.jackson.map.ser.BeanSerializer.serializeFields(BeanSerializer.java:175)  
  44.     at org.codehaus.jackson.map.ser.BeanSerializer.serialize(BeanSerializer.java:142)  
  45.     at org.codehaus.jackson.map.ser.ContainerSerializers$CollectionSerializer.serializeContents(ContainerSerializers.java:442)  
  46.     at org.codehaus.jackson.map.ser.ContainerSerializers$CollectionSerializer.serializeContents(ContainerSerializers.java:383)  
  47.     at org.codehaus.jackson.map.ser.ContainerSerializers$AsArraySerializer.serialize(ContainerSerializers.java:142)  
  48.     at org.codehaus.jackson.map.ser.BeanPropertyWriter.serializeAsField(BeanPropertyWriter.java:428)  
  49.     at org.codehaus.jackson.map.ser.BeanSerializer.serializeFields(BeanSerializer.java:175)  
  50.     at org.codehaus.jackson.map.ser.BeanSerializer.serialize(BeanSerializer.java:142)  
  51.     at org.codehaus.jackson.map.ser.BeanPropertyWriter.serializeAsField(BeanPropertyWriter.java:428)  
  52.     at org.codehaus.jackson.map.ser.BeanSerializer.serializeFields(BeanSerializer.java:175)  
  53.     at org.codehaus.jackson.map.ser.BeanSerializer.serialize(BeanSerializer.java:142)  
  54.     at org.codehaus.jackson.map.ser.ContainerSerializers$CollectionSerializer.serializeContents(ContainerSerializers.java:442)  
  55.     at org.codehaus.jackson.map.ser.ContainerSerializers$CollectionSerializer.serializeContents(ContainerSerializers.java:383)  
  56.     at org.codehaus.jackson.map.ser.ContainerSerializers$AsArraySerializer.serialize(ContainerSerializers.java:142)  
  57.     at org.codehaus.jackson.map.ser.BeanPropertyWriter.serializeAsField(BeanPropertyWriter.java:428)  
  58.     at org.codehaus.jackson.map.ser.BeanSerializer.serializeFields(BeanSerializer.java:175)  
  59.     at org.codehaus.jackson.map.ser.BeanSerializer.serialize(BeanSerializer.java:142)  
  60.     at org.codehaus.jackson.map.ser.BeanPropertyWriter.serializeAsField(BeanPropertyWriter.java:428)  
  61.     at org.codehaus.jackson.map.ser.BeanSerializer.serializeFields(BeanSerializer.java:175)  
  62.     at org.codehaus.jackson.map.ser.BeanSerializer.serialize(BeanSerializer.java:142)  
  63.     at org.codehaus.jackson.map.ser.ContainerSerializers$CollectionSerializer.serializeContents(ContainerSerializers.java:442)  
  64.     at org.codehaus.jackson.map.ser.ContainerSerializers$CollectionSerializer.serializeContents(ContainerSerializers.java:383)  
  65.     at org.codehaus.jackson.map.ser.ContainerSerializers$AsArraySerializer.serialize(ContainerSerializers.java:142)  
  66.     at org.codehaus.jackson.map.ser.BeanPropertyWriter.serializeAsField(BeanPropertyWriter.java:428)  
  67.     at org.codehaus.jackson.map.ser.BeanSerializer.serializeFields(BeanSerializer.java:175)  
  68.     at org.codehaus.jackson.map.ser.BeanSerializer.serialize(BeanSerializer.java:142)  
  69.     at org.codehaus.jackson.map.ser.BeanPropertyWriter.serializeAsField(BeanPropertyWriter.java:428)  
  70.     at org.codehaus.jackson.map.ser.BeanSerializer.serializeFields(BeanSerializer.java:175)  
  71.     at org.codehaus.jackson.map.ser.BeanSerializer.serialize(BeanSerializer.java:142)  


這裏兩個實體類： Album(相冊) 和 photo(照片)   是一對多雙向關聯

死循環原因： JSON無法對Album的photos屬性進去JSON轉換

解決辦法：

     在Album實體類上加註釋@JsonIgnoreProperties(value={"photos"})

 

  1. @Entity  
  2. @SuppressWarnings("serial")  
  3. @JsonIgnoreProperties(value={"photos"})     
  4. public class Album implements java.io.Serializable {

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