If a parameter has the var keyword, a public writer method is also generated with the parameter’s name as a prefix, followed by _=.

如果参数有一个var 关键字，一个公有的写方法会被自动生成，并且名字为参数名加下划线等号（_=）。

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Note that the close method only releases any resources that the writer acquired, but it does not close the underlying output.

注意关闭方法只释放编写器需要的资源，并不关闭底层的输出。

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JSR 286 adds a write method that allows you to stream URL objects directly to the response writer instead, avoiding the creation of temporary string objects.

JSR 286添加了write方法，允许您将URL对象直接流向响应写出程序，从而避免创建临时字符串对象。

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