考虑下面这种情况：一个用户开始填写一个索赔表单，但不能定位他们的保单编号。
Consider the situation where a user started filling out a claim form but could not locate their policy number.
您可以修改这个JSP文件，以包含一个表单字段，在该字段中输入ISBN编号并获得结果。
You can modify the JSP file to include a form field in which you can enter an ISBN number and get a result.
考虑清单5中的表单，该表单将显示如何存储会话中的用户ID和帐户编号。
Consider the form in Listing 5, which shows how to store a user's id and account number in a session.
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