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Error in render: “TypeError: Cannot read properties of null (reading ‘protocol‘)“

nullpeerpropertiesprotoprotocrendertietypeerror

springboot 项目,返回的实体类里面字段是null ,现在想要为空应该是““,空字符串,而不是null

bootnullringspringspringboot字符串

求助!SpringBoot Post调用WebApi接口,WebApi接口接收不到请求的数据,为null

apibootnullringspringspringbootweb
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