java - JSONWithPadding 中缺少分号

Question

JSONWithPadding的结果最后缺少分号:

 JSONWithPadding jsonWithPadding = new JSONWithPadding({"key":"value"}, "cb");
 return Response.status(200).entity(jsonWithPadding).build();

预期:

cb({"key":"value"});  --> with semicolon

实际:

cb({"key":"value"})  --> without semicolon

有什么想法吗？

Answer 1

分号没有丢失，在(本示例和)大多数情况下，分号是可选的。因此 JSONWithPadding 类工作正常。

ECMAScript 语言规范定义了 7.9.1 Rules of Automatic Semicolon Insertion ，总结自JavaScript and Semicolons作为

Certain ECMAScript statements (empty statement, variable statement, expression statement, do-while statement, continue statement, break statement, return statement, and throw statement) must be terminated with semicolons

What are the rules for JavaScript's automatic semicolon insertion (ASI)? 对此也有很好的介绍。