SpringMVC由于级联导致查询结果重复

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2011-12-22 11:15:58 org.apache.catalina.core.StandardWrapperValve invoke

严重: Servlet.service() for servlet spring threw exception

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"])

at org.codehaus.jackson.map.ser.BeanSerializer.serializeFields(BeanSerializer.java:189)

at org.codehaus.jackson.map.ser.BeanSerializer.serialize(BeanSerializer.java:142)

at org.codehaus.jackson.map.ser.BeanPropertyWriter.serializeAsField(BeanPropertyWriter.java:428)

at org.codehaus.jackson.map.ser.BeanSerializer.serializeFields(BeanSerializer.java:175)

at org.codehaus.jackson.map.ser.BeanSerializer.serialize(BeanSerializer.java:142)

at org.codehaus.jackson.map.ser.ContainerSerializers$CollectionSerializer.serializeContents(ContainerSerializers.java:442)

at org.codehaus.jackson.map.ser.ContainerSerializers$CollectionSerializer.serializeContents(ContainerSerializers.java:383)

at org.codehaus.jackson.map.ser.ContainerSerializers$AsArraySerializer.serialize(ContainerSerializers.java:142)

at org.codehaus.jackson.map.ser.BeanPropertyWriter.serializeAsField(BeanPropertyWriter.java:428)

at org.codehaus.jackson.map.ser.BeanSerializer.serializeFields(BeanSerializer.java:175)

at org.codehaus.jackson.map.ser.BeanSerializer.serialize(BeanSerializer.java:142)

at org.codehaus.jackson.map.ser.BeanPropertyWriter.serializeAsField(BeanPropertyWriter.java:428)

at org.codehaus.jackson.map.ser.BeanSerializer.serializeFields(BeanSerializer.java:175)

at org.codehaus.jackson.map.ser.BeanSerializer.serialize(BeanSerializer.java:142)

at org.codehaus.jackson.map.ser.ContainerSerializers$CollectionSerializer.serializeContents(ContainerSerializers.java:442)

at org.codehaus.jackson.map.ser.ContainerSerializers$CollectionSerializer.serializeContents(ContainerSerializers.java:383)

at org.codehaus.jackson.map.ser.ContainerSerializers$AsArraySerializer.serialize(ContainerSerializers.java:142)

at org.codehaus.jackson.map.ser.BeanPropertyWriter.serializeAsField(BeanPropertyWriter.java:428)

at org.codehaus.jackson.map.ser.BeanSerializer.serializeFields(BeanSerializer.java:175)

at org.codehaus.jackson.map.ser.BeanSerializer.serialize(BeanSerializer.java:142)

at org.codehaus.jackson.map.ser.BeanPropertyWriter.serializeAsField(BeanPropertyWriter.java:428)

at org.codehaus.jackson.map.ser.BeanSerializer.serializeFields(BeanSerializer.java:175)

at org.codehaus.jackson.map.ser.BeanSerializer.serialize(BeanSerializer.java:142)

at org.codehaus.jackson.map.ser.ContainerSerializers$CollectionSerializer.serializeContents(ContainerSerializers.java:442)

at org.codehaus.jackson.map.ser.ContainerSerializers$CollectionSerializer.serializeContents(ContainerSerializers.java:383)

at org.codehaus.jackson.map.ser.ContainerSerializers$AsArraySerializer.serialize(ContainerSerializers.java:142)

at org.codehaus.jackson.map.ser.BeanPropertyWriter.serializeAsField(BeanPropertyWriter.java:428)

at org.codehaus.jackson.map.ser.BeanSerializer.serializeFields(BeanSerializer.java:175)

at org.codehaus.jackson.map.ser.BeanSerializer.serialize(BeanSerializer.java:142)

at org.codehaus.jackson.map.ser.BeanPropertyWriter.serializeAsField(BeanPropertyWriter.java:428)

at org.codehaus.jackson.map.ser.BeanSerializer.serializeFields(BeanSerializer.java:175)

at org.codehaus.jackson.map.ser.BeanSerializer.serialize(BeanSerializer.java:142)

at org.codehaus.jackson.map.ser.ContainerSerializers$CollectionSerializer.serializeContents(ContainerSerializers.java:442)

at org.codehaus.jackson.map.ser.ContainerSerializers$CollectionSerializer.serializeContents(ContainerSerializers.java:383)

at org.codehaus.jackson.map.ser.ContainerSerializers$AsArraySerializer.serialize(ContainerSerializers.java:142)

at org.codehaus.jackson.map.ser.BeanPropertyWriter.serializeAsField(BeanPropertyWriter.java:428)

at org.codehaus.jackson.map.ser.BeanSerializer.serializeFields(BeanSerializer.java:175)

at org.codehaus.jackson.map.ser.BeanSerializer.serialize(BeanSerializer.java:142)

at org.codehaus.jackson.map.ser.BeanPropertyWriter.serializeAsField(BeanPropertyWriter.java:428)

at org.codehaus.jackson.map.ser.BeanSerializer.serializeFields(BeanSerializer.java:175)

at org.codehaus.jackson.map.ser.BeanSerializer.serialize(BeanSerializer.java:142)

at org.codehaus.jackson.map.ser.ContainerSerializers$CollectionSerializer.serializeContents(ContainerSerializers.java:442)

at org.codehaus.jackson.map.ser.ContainerSerializers$CollectionSerializer.serializeContents(ContainerSerializers.java:383)

at org.codehaus.jackson.map.ser.ContainerSerializers$AsArraySerializer.serialize(ContainerSerializers.java:142)

at org.codehaus.jackson.map.ser.BeanPropertyWriter.serializeAsField(BeanPropertyWriter.java:428)

at org.codehaus.jackson.map.ser.BeanSerializer.serializeFields(BeanSerializer.java:175)

at org.codehaus.jackson.map.ser.BeanSerializer.serialize(BeanSerializer.java:142)

at org.codehaus.jackson.map.ser.BeanPropertyWriter.serializeAsField(BeanPropertyWriter.java:428)

at org.codehaus.jackson.map.ser.BeanSerializer.serializeFields(BeanSerializer.java:175)

at org.codehaus.jackson.map.ser.BeanSerializer.serialize(BeanSerializer.java:142)

at org.codehaus.jackson.map.ser.ContainerSerializers$CollectionSerializer.serializeContents(ContainerSerializers.java:442)

at org.codehaus.jackson.map.ser.ContainerSerializers$CollectionSerializer.serializeContents(ContainerSerializers.java:383)

at org.codehaus.jackson.map.ser.ContainerSerializers$AsArraySerializer.serialize(ContainerSerializers.java:142)

at org.codehaus.jackson.map.ser.BeanPropertyWriter.serializeAsField(BeanPropertyWriter.java:428)

at org.codehaus.jackson.map.ser.BeanSerializer.serializeFields(BeanSerializer.java:175)

at org.codehaus.jackson.map.ser.BeanSerializer.serialize(BeanSerializer.java:142)

at org.codehaus.jackson.map.ser.BeanPropertyWriter.serializeAsField(BeanPropertyWriter.java:428)

at org.codehaus.jackson.map.ser.BeanSerializer.serializeFields(BeanSerializer.java:175)

at org.codehaus.jackson.map.ser.BeanSerializer.serialize(BeanSerializer.java:142)

at org.codehaus.jackson.map.ser.ContainerSerializers$CollectionSerializer.serializeContents(ContainerSerializers.java:442)

at org.codehaus.jackson.map.ser.ContainerSerializers$CollectionSerializer.serializeContents(ContainerSerializers.java:383)

at org.codehaus.jackson.map.ser.ContainerSerializers$AsArraySerializer.serialize(ContainerSerializers.java:142)

at org.codehaus.jackson.map.ser.BeanPropertyWriter.serializeAsField(BeanPropertyWriter.java:428)

at org.codehaus.jackson.map.ser.BeanSerializer.serializeFields(BeanSerializer.java:175)

at org.codehaus.jackson.map.ser.BeanSerializer.serialize(BeanSerializer.java:142)

at org.codehaus.jackson.map.ser.BeanPropertyWriter.serializeAsField(BeanPropertyWriter.java:428)

at org.codehaus.jackson.map.ser.BeanSerializer.serializeFields(BeanSerializer.java:175)

at org.codehaus.jackson.map.ser.BeanSerializer.serialize(BeanSerializer.java:142)

这里两个实体类： Album(相册) 和 photo(照片) 是一对多双向关联

死循环原因： JSON无法对Album的photos属性进去JSON转换

解决办法：

在Album实体类上加注释@JsonIgnoreProperties(value={"photos"})

@Entity

@SuppressWarnings("serial")

@JsonIgnoreProperties(value={"photos"})

public class Album implements java.io.Serializable {

记录学习，转自/article/9530551.html，感谢