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Java 在条件下插入条件图像

java spring if-statement

Java 在条件下插入条件图像,java,spring,if-statement,thymeleaf,Java,Spring,If Statement,Thymeleaf,我正在尝试在Thymeleaf中执行条件： <img th:src="${{chat.sender.id} == ${#authentication.principal.user.id} ?: '/img/' + ${chat.sender.userProfile.avatar} : '/img/' + ${chat.receiver.userProfile.avatar} }"/> <img th:src="${chat.sender.id} == ${#authent

我正在尝试在Thymeleaf中执行条件：

 <img th:src="${{chat.sender.id} == ${#authentication.principal.user.id} ?: '/img/' + ${chat.sender.userProfile.avatar} : '/img/' + ${chat.receiver.userProfile.avatar} }"/>

 <img th:src="${chat.sender.id} == ${#authentication.principal.user.id} ? '/img/' + ${chat.sender.userProfile.avatar} : '/img/' + ${chat.receiver.userProfile.avatar} "/>
请解释我做错了什么。

您不应该用${}来包装整个块。同时更改？：改为？，看起来像是打字错误。 试一试



 <img th:src="${chat.sender.id} == ${#authentication.principal.user.id} ? '/img/' + ${chat.sender.userProfile.avatar} : '/img/' + ${chat.receiver.userProfile.avatar} "/>