`

解决spring mvc JSON 无法转换对象为json格式 无限死循环

jsonspringmvcajaxjava 
阅读更多
控制台出现如下循环异常： 
at org.codehaus.jackson.map.ser.std.BeanSerializerBase.serializeFields(BeanSerializerBase.java:150)
	at org.codehaus.jackson.map.ser.BeanSerializer.serialize(BeanSerializer.java:112)
	at org.codehaus.jackson.map.ser.BeanPropertyWriter.serializeAsField(BeanPropertyWriter.java:446)
	at org.codehaus.jackson.map.ser.std.BeanSerializerBase.serializeFields(BeanSerializerBase.java:150)
	at org.codehaus.jackson.map.ser.BeanSerializer.serialize(BeanSerializer.java:112)
	at org.codehaus.jackson.map.ser.std.CollectionSerializer.serializeContents(CollectionSerializer.java:72)
	at org.codehaus.jackson.map.ser.std.CollectionSerializer.serializeContents(CollectionSerializer.java:23)
	at org.codehaus.jackson.map.ser.std.AsArraySerializerBase.serialize(AsArraySerializerBase.java:86)
	at org.codehaus.jackson.map.ser.BeanPropertyWriter.serializeAsField(BeanPropertyWriter.java:446)
	at org.codehaus.jackson.map.ser.std.BeanSerializerBase.serializeFields(BeanSerializerBase.java:150)
	at org.codehaus.jackson.map.ser.BeanSerializer.serialize(BeanSerializer.java:112)
	at org.codehaus.jackson.map.ser.BeanPropertyWriter.serializeAsField(BeanPropertyWriter.java:446)
	at org.codehaus.jackson.map.ser.std.BeanSerializerBase.serializeFields(BeanSerializerBase.java:150)
	at org.codehaus.jackson.map.ser.BeanSerializer.serialize(BeanSerializer.java:112)
	at org.codehaus.jackson.map.ser.std.CollectionSerializer.serializeContents(CollectionSerializer.java:72)
	at org.codehaus.jackson.map.ser.std.CollectionSerializer.serializeContents(CollectionSerializer.java:23)
	at org.codehaus.jackson.map.ser.std.AsArraySerializerBase.serialize(AsArraySerializerBase.java:86)
	at 
org.codehaus.jackson.map.ser.BeanPropertyWriter.serializeAsField(BeanPropertyWriter.java:446)
	at org.codehaus.jackson.map.ser.std.BeanSerializerBase.serializeFields(BeanSerializerBase.java:150)
	at org.codehaus.jackson.map.ser.BeanSerializer.serialize(BeanSerializer.java:112)
	at org.codehaus.jackson.map.ser.BeanPropertyWriter.serializeAsField(BeanPropertyWriter.java:446)
	at org.codehaus.jackson.map.ser.std.BeanSerializerBase.serializeFields(BeanSerializerBase.java:150)
	at org.codehaus.jackson.map.ser.BeanSerializer.serialize(BeanSerializer.java:112)
	at org.codehaus.jackson.map.ser.std.CollectionSerializer.serializeContents(CollectionSerializer.java:72)
	at org.codehaus.jackson.map.ser.std.CollectionSerializer.serializeContents(CollectionSerializer.java:23)
	at org.codehaus.jackson.map.ser.std.AsArraySerializerBase.serialize(AsArraySerializerBase.java:86)
	at org.codehaus.jackson.map.ser.BeanPropertyWriter.serializeAsField(BeanPropertyWriter.java:446)
	at org.codehaus.jackson.map.ser.std.BeanSerializerBase.serializeFields(BeanSerializerBase.java:150)
	at org.codehaus.jackson.map.ser.BeanSerializer.serialize(BeanSerializer.java:112)
	at org.codehaus.jackson.map.ser.BeanPropertyWriter.serializeAsField(BeanPropertyWriter.java:446)
	at org.codehaus.jackson.map.ser.std.BeanSerializerBase.serializeFields(BeanSerializerBase.java:150)
	at org.codehaus.jackson.map.ser.BeanSerializer.serialize(BeanSerializer.java:112)
	at org.codehaus.jackson.map.ser.std.CollectionSerializer.serializeContents(CollectionSerializer.java:72)
	at org.codehaus.jackson.map.ser.std.CollectionSerializer.serializeContents(CollectionSerializer.java:23)
	at org.codehaus.jackson.map.ser.std.AsArraySerializerBase.serialize(AsArraySerializerBase.java:86)
	at org.codehaus.jackson.map.ser.BeanPropertyWriter.serializeAsField(BeanPropertyWriter.java:446)
	at org.codehaus.jackson.map.ser.std.BeanSerializerBase.serializeFields(BeanSerializerBase.java:150)
	at org.codehaus.jackson.map.ser.BeanSerializer.serialize(BeanSerializer.java:112)
	at org.codehaus.jackson.map.ser.BeanPropertyWriter.serializeAsField(BeanPropertyWriter.java:446)
	at org.codehaus.jackson.map.ser.std.BeanSerializerBase.serializeFields(BeanSerializerBase.java:150)
	at org.codehaus.jackson.map.ser.BeanSerializer.serialize(BeanSerializer.java:112)
	at org.codehaus.jackson.map.ser.std.CollectionSerializer.serializeContents(CollectionSerializer.java:72)
	at org.codehaus.jackson.map.ser.std.CollectionSerializer.serializeContents(CollectionSerializer.java:23)
	at org.codehaus.jackson.map.ser.std.AsArraySerializerBase.serialize(AsArraySerializerBase.java:86)
	at org.codehaus.jackson.map.ser.BeanPropertyWriter.serializeAsField(BeanPropertyWriter.java:446)
	at org.codehaus.jackson.map.ser.std.BeanSerializerBase.serializeFields(BeanSerializerBase.java:150)
	at org.codehaus.jackson.map.ser.BeanSerializer.serialize(BeanSerializer.java:112)
	at org.codehaus.jackson.map.ser.BeanPropertyWriter.serializeAsField(BeanPropertyWriter.java:446)
	at org.codehaus.jackson.map.ser.std.BeanSerializerBase.serializeFields(BeanSerializerBase.java:150)
	at org.codehaus.jackson.map.ser.BeanSerializer.serialize(BeanSerializer.java:112)
	at org.codehaus.jackson.map.ser.std.CollectionSerializer.serializeContents(CollectionSerializer.java:72)
	at org.codehaus.jackson.map.ser.std.CollectionSerializer.serializeContents(CollectionSerializer.java:23)
	at org.codehaus.jackson.map.ser.std.AsArraySerializerBase.serialize(AsArraySerializerBase.java:86)
	at org.codehaus.jackson.map.ser.BeanPropertyWriter.serializeAsField(BeanPropertyWriter.java:446)
	at org.codehaus.jackson.map.ser.std.BeanSerializerBase.serializeFields(BeanSerializerBase.java:150)
	at org.codehaus.jackson.map.ser.BeanSerializer.serialize(BeanSerializer.java:112)
	at org.codehaus.jackson.map.ser.BeanPropertyWriter.serializeAsField(BeanPropertyWriter.java:446)
	at org.codehaus.jackson.map.ser.std.BeanSerializerBase.serializeFields(BeanSerializerBase.java:150)
	at org.codehaus.jackson.map.ser.BeanSerializer.serialize(BeanSerializer.java:112)
	at org.codehaus.jackson.map.ser.std.CollectionSerializer.serializeContents(CollectionSerializer.java:72)
	at org.codehaus.jackson.map.ser.std.CollectionSerializer.serializeContents(CollectionSerializer.java:23)
	at org.codehaus.jackson.map.ser.std.AsArraySerializerBase.serialize(AsArraySerializerBase.java:86)
	at org.codehaus.jackson.map.ser.BeanPropertyWriter.serializeAsField(BeanPropertyWriter.java:446)
	at org.codehaus.jackson.map.ser.std.BeanSerializerBase.serializeFields(BeanSerializerBase.java:150)
	at org.codehaus.jackson.map.ser.BeanSerializer.serialize(BeanSerializer.java:112)
	at org.codehaus.jackson.map.ser.BeanPropertyWriter.serializeAsField(BeanPropertyWriter.java:446)
	at org.codehaus.jackson.map.ser.std.BeanSerializerBase.serializeFields(BeanSerializerBase.java:150)
	at org.codehaus.jackson.map.ser.BeanSerializer.serialize(BeanSerializer.java:112)
	at org.codehaus.jackson.map.ser.std.CollectionSerializer.serializeContents(CollectionSerializer.java:72)
	at org.codehaus.jackson.map.ser.std.CollectionSerializer.serializeContents(CollectionSerializer.java:23)
	at org.codehaus.jackson.map.ser.std.AsArraySerializerBase.serialize(AsArraySerializerBase.java:86)
	at org.codehaus.jackson.map.ser.BeanPropertyWriter.serializeAsField(BeanPropertyWriter.java:446)
	at org.codehaus.jackson.map.ser.std.BeanSerializerBase.serializeFields(BeanSerializerBase.java:150)
	at org.codehaus.jackson.map.ser.BeanSerializer.serialize(BeanSerializer.java:112)
	at org.codehaus.jackson.map.ser.BeanPropertyWriter.serializeAsField(BeanPropertyWriter.java:446)
	at org.codehaus.jackson.map.ser.std.BeanSerializerBase.serializeFields(BeanSerializerBase.java:150)
	at org.codehaus.jackson.map.ser.BeanSerializer.serialize(BeanSerializer.java:112)
	at org.codehaus.jackson.map.ser.std.CollectionSerializer.serializeContents(CollectionSerializer.java:72)
	at org.codehaus.jackson.map.ser.std.CollectionSerializer.serializeContents(CollectionSerializer.java:23)
	at org.codehaus.jackson.map.ser.std.AsArraySerializerBase.serialize(AsArraySerializerBase.java:86)
	at org.codehaus.jackson.map.ser.BeanPropertyWriter.serializeAsField(BeanPropertyWriter.java:446)
	at org.codehaus.jackson.map.ser.std.BeanSerializerBase.serializeFields(BeanSerializerBase.java:150)
	at org.codehaus.jackson.map.ser.BeanSerializer.serialize(BeanSerializer.java:112)
	at org.codehaus.jackson.map.ser.BeanPropertyWriter.serializeAsField(BeanPropertyWriter.java:446)
	at org.codehaus.jackson.map.ser.std.BeanSerializerBase.serializeFields(BeanSerializerBase.java:150)
	at org.codehaus.jackson.map.ser.BeanSerializer.serialize(BeanSerializer.java:112)
	at org.codehaus.jackson.map.ser.std.CollectionSerializer.serializeContents(CollectionSerializer.java:72)

今天做显示商品评论功能  使用springmvc ajax加载,查询出来的数据转换成json时出现了死循环，如下：
引用

[{"commentid":22,"goods":{"goodsid":8,"goodsarea":{"areaid":3,"areaName":"毕节特产","goodses":[{"goodsid":8,"goodsarea":{"areaid":3,"areaName":"毕节特产","goodses":[{"goodsid":8,"goodsarea":{"areaid":3,"areaName":"毕节特产","goodses":[{"goodsid":8,"goodsarea":{"areaid":3,"areaName":"毕节特产","goodses":[{"goodsid":8,"goodsarea":{"areaid":3,"areaName":"毕节特产","goodses":[{"goodsid":8,"goodsarea":{"areaid":3,"areaName":"毕节特产","goodses":[{"goodsid":8,"goodsarea":{"areaid":3,"areaName":"毕节特产","goodses":[{"goodsid":8,"goodsarea":{"areaid":3,"areaName":"毕节特产","goodses":[{"goodsid":8,"goodsarea":{"areaid":3,"areaName":"毕节特产","goodses":[{"goodsid":8,"goodsarea":{"areaid":3,"areaName":"毕节特产","goodses":[{"goodsid":8,"goodsarea":{"areaid":3,"areaName":"毕节特产","goodses":[{"goodsid":8,"goodsarea":{"areaid":3,"areaName":"毕节特产","goodses":[{"goodsid":8,"goodsarea":{"areaid":3,"areaName":"毕节特产","goodses":[{"goodsid":8,"goodsarea":{"areaid":3,"areaName":"毕节特产","goodses":[{"goodsid":8,"goodsarea":{"areaid":3,"areaName":"毕节特产","goodses":[{"goodsid":8,"goodsarea":{"areaid":3,"areaName":"毕节特产","goodses":[{"goodsid":8,"goodsarea":{"areaid":3,"areaName":"毕节特产","goodses":[{"goodsid":8,"goodsarea":{"areaid":3,"areaName":"毕节特产","goodses":[{"goodsid":8,"goodsarea":{"areaid":3,"areaName":"毕节特产","goodses":[{"goodsid":8,"goodsarea":{"areaid":3,"areaName":"毕节特产","goodses":[{"goodsid":8,"goodsarea":{"areaid":3,"areaName":"毕节特产","goodses":[{"goodsid":8,"goodsarea":{"areaid":3,"areaName":"毕节特产","goodses":[{"goodsid":8,"goodsarea":{"areaid":3,"areaName":"毕节特产","goodses":[{"goodsid":8,"goodsarea":{"areaid":3,"areaName":"毕节特产","goodses":[{"goodsid":8,"goodsarea":{"areaid":3,"areaName":"毕节特产","goodses":[{"goodsid":8,"goodsarea":{"areaid":3,"areaName":"毕节特产","goodses":[{"goodsid":8,"goodsarea":{"areaid":3,"areaName":"毕节特产","goodses":[{"goodsid":8,"goodsarea":{"areaid":3,"areaName":"毕节特产","goodses":[{"goodsid":8,"goodsarea":{"areaid":3,"areaName":"毕节特产","goodses":[{"goodsid":8,"goodsarea":{"areaid":3,"areaName":"毕节特产","goodses":[{"goodsid":8,"goodsarea":{"areaid":3,"areaName":"毕节特产","goodses":[{"goodsid":8,"goodsarea":{"areaid":3,"areaName":"毕节特产","goodses":[{"goodsid":8,"goodsarea":{"areaid":3,"areaName":"毕节特产","goodses":[{"goodsid":8,"goodsarea":{"areaid":3,"areaName":"毕节特产","goodses":[{"goodsid":8,"goodsarea":{"areaid":3,"areaName":"毕节特产","goodses":[{"goodsid":8,"goodsarea":{"areaid":3,"areaName":"毕节特产","goodses":[{"goodsid":8,"goodsarea":{"areaid":3,"areaName":"毕节特产","goodses":[{"goodsid":8,"goodsarea":{"areaid":3,"areaName":"毕节特产","goodses":[{"goodsid":8,"goodsarea":{"areaid":3,"areaName":"毕节特产","goodses":[{"goodsid":8,"goodsarea":{"areaid":3,"areaName":"毕节特产","goodses":[{"goodsid":8,"goodsarea":{"areaid":3,"areaName":"毕节特产","goodses":[{"goodsid":8,"goodsarea":{"areaid":3,"areaName":"毕节特产","goodses":[{"goodsid":8,"goodsarea":{"areaid":3,"areaName":"毕节特产","goodses":[{"goodsid":8,"goodsarea":{"areaid":3,"areaName":"毕节特产","goodses":[{"goodsid":8,"goodsarea":{"areaid":3,"areaName":"毕节特产","goodses":[{"goodsid":8,"goodsarea":{"areaid":3,"areaName":"毕节特产","goodses":[{"goodsid":8,"goodsarea":{"areaid":3,"areaName":"毕节特产","goodses":[{"goodsid":8,"goodsarea":{"areaid":3,"areaName":"毕节特产","goodses":[{"goodsid":8,"goodsarea":{"areaid":3,"areaName":"毕节特产","goodses":[{"goodsid":8,"goodsarea":{"areaid":3,"areaName":"毕节特产","goodses":[{"goodsid":8,"goodsarea":{"areaid":3,"areaName":"毕节特产","goodses":[{"goodsid":8,"goodsarea":{"areaid":3,"areaName":"毕节特产","goodses":[{"goodsid":8,"goodsarea":{"areaid":3,"areaName":"毕节特产","goodses":[{"goodsid":8,"goodsarea":{"areaid":3,"areaName":"毕节特产","goodses":[{"goodsid":8,"goodsarea":{"areaid":3,"areaName":"毕节特产","goodses":[{"goodsid":8,"goodsarea":{"areaid":3,"areaName":"毕节特产","goodses":[{"goodsid":8,"goodsarea":{"areaid":3,"areaName":"毕节特产",

查询评论表  而评论表和商品表是多对一的关系，商品表和分类表.地区表多对一的关系，
死循环原因：json无法对comments表的goods属性进行转换
解决办法：
在comments实体类上加注解@JsonIgnoreProperties(value={"goods"}) 
@JsonIgnoreProperties(value={"goods"})
public class Comments implements java.io.Serializable {

	// Fields

	/**
	 * 
	 */
	private static final long serialVersionUID = 6666646538881797793L;
	private Integer commentid;
	private Goods goods;
	private User user;
	private String comment;
	private String time;


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| java语言String这个神奇的类为什么是final
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