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The server encountered an internal error that prevented it from fulfilling this request.(JsonMappingException: Conflicting getter definitions)

在测试一个方法,dubug查看查询结果已经出来了,结果页面上是The server encountered an internal error that prevented it from fulfilling this request.,再debug ,发现ServletInvocableHandlerMethod#invokeAndHandle中 发现如下异常:

org.springframework.http.converter.HttpMessageNotWritableException: Could not write JSON: Conflicting getter definitions for property "buyNow":..........nested exception is org.codehaus.jackson.map.JsonMappingException: Conflicting getter definitions for property "buyNow".....xxxxxxxxxxxxxxxxxxxxxxxxxxxxxx#isBuyNow(0 params) vs xxxxxxxxxxxxxxxx#getBuyNow(0 params)
从上面的异常找到相应的bean,如下图3行和11行
 1 /** 是否直接购买(1|是,0|不是,默认0) */
 2 private Integer buyNow;
 3 public Integer getBuyNow (){
 4     return buyNow;
 5 }
 6 
 7 public void setBuyNow (Integer buyNow){
 8     this.buyNow = buyNow;
 9 }
10 
11 public boolean isBuyNow() {
12     return BUY_NOW_YES.equals(buyNow);
13 }

从异常提示的信息可以看出jackson处理bean时不知道该调用#isBuyNow还是#getBuyNow,对于此次当然可以告诉jackson忽略,加个@JsonIgnore是可以的,但是这个地方其实平时代码规范的问题,其实不仅是jackson处理上还有其它的地方也会有此问题,所以方法命名上就要杜绝这种is打头的命名方式是最好的(我认为的)。

posted @ 2018-05-17 15:24  南田玉彦  阅读(1370)  评论(0编辑  收藏  举报