When a JSF validator finds an error, the form is returned to the user so he or she can correct it.

当JSF验证器发现一个错误时，将向用户返回此表单，以便改正。

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This ensures that error messages generated by the validator are correctly displayed in the form.

这确保验证器生成的错误消息正确地显示在表单中。

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Server field validator—adds server-side validation to HTML form fields.

服务器字段验证器 — 向 HTML 表单字段添加服务器端验证。

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