解决Failed to instantiate [java.util.List]: Specified class is an interface问题
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错误信息提示
Failed to instantiate [java.util.List]: Specified class is an interface;
前端传递一个数组对象时,后端接收实例化出错
javascript代码
var userIdArr = [1,2,3];$.ajax({ url:"/receiveArr", dataType:"POST", data:{"userIdArr":userIdArr}, success:function(rtn){ alert("OK"); }})
Java代码
@RequestMapping(value = "receiveArr", method = RequestMethod.POST)@ResponesBodypublic String receiveArr(@RequestParam(value = "userIdArr") int[] userIds){ return "";}
解决办法:
在java方法参数注解@RequestParam中的value值后添加”[ ]”,
即:@RequestParam(value = “userIdArr[]“)
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