我目前正在为一项作业处理一个 xml 文件，但是在花费了大约一个半小时后，每当我尝试在网络浏览器中打开 xml 文件时，都会继续获得“文档末尾的额外内容”在试图找出造成这种情况的原因时，我仍然没有任何运气，所以如果有人可以帮助指出我所犯的错误或指出我正确的方向，我将不胜感激，谢谢！这是xml内容本身
<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
<?xml-stylesheet type="text/css" href="Access Data_Phase A_Test Program.css"?>
<client_information xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="Access Data_Client Projects_Schema.xsd"/>
<client>
<client_ID> 1 </client_ID>
<client_name> John Hill </client_name>
<client_address>
<client_address_street>
<client_address_street_1> 123 Broad Street </client_address_street_1>
<client_address_street_2> Apartment 2 </client_address_street_2>
</client_address_street>
<client_address_city> State College </client_address_city>
<client_address_state> PA </client_address_state>
<client_address_zip> 16801 </client_address_zip>
</client_address>
<client_phone_number> 614222333 </client_phone_number>
<client_fax_number> 6143234444 </client_fax_number>
<client_email> jhill@ist.psu.edu </client_email>
<project>
<project_number> 22 </project_number>
<contact_person>
<contact_person_name> Patrick Lunney </contact_person_name>
<contact_person_phone_number> 5554443333 </contact_person_phone_number>
<contact_person_fax_number> 6667778888 </contact_person_fax_number>
<contact_person_email> pat@email.com </contact_person_email>
</contact_person>
<delivery_preference> Phone </delivery_preference>
</project>
</client>
<client>
<client_ID> 2 </client_ID>
<client_name> Austin Wonderly </client_name>
<client_address>
<client_address_street>
<client_address_street_1> thompson hall </client_address_street_1>
<client_address_street_2> room 256 </client_address_street_2>
</client_address_street>
<client_address_city> University Park </client_address_city>
<client_address_state> PA </client_address_state>
<client_address_zip> 16802 </client_address_zip>
</client_address>
<client_phone_number> 7167964202 </client_phone_number>
<client_fax_number> 7815852085 </client_fax_number>
<client_email> ajw5293@psu.edu </client_email>
<project>
<project_number> 44 </project_number>
<contact_person>
<contact_person_name> James Wonderly </contact_person_name>
<contact_person_phone_number> 7169129546 </contact_person_phone_number>
<contact_person_fax_number> 7166560432 </contact_person_fax_number>
<contact_person_email> jwonderly@aholdusa.com </contact_person_email>
</contact_person>
<delivery_preference> Email </delivery_preference>
</project>
</client>
<client>
<client_ID> 3 </client_ID>
<client_name> Mike Jones </client_name>
<client_address>
<client_address_street>
<client_address_street_1> Park Avenue Plaza </client_address_street_1>
<client_address_street_2> 55 East 52nd Street </client_address_street_2>
</client_address_street>
<client_address_city> New York </client_address_city>
<client_address_state> NY </client_address_state>
<client_address_zip> 10055 </client_address_zip>
</client_address>
<client_phone_number> 2128105300 </client_phone_number>
<client_fax_number> 2127543123 </client_fax_number>
<client_email> mjones@psu.edu </client_email>
<project>
<project_number> 4 </project_number>
<contact_person>
<contact_person_name> Tom Dombrowski </contact_person_name>
<contact_person_phone_number> 7815553700 </contact_person_phone_number>
<contact_person_fax_number> 7816326000 </contact_person_fax_number>
<contact_person_email> tdombrowski@msn.com </contact_person_email>
</contact_person>
<delivery_preference> Fax </delivery_preference>
</project>
</client>
<client>
<client_ID> 4 </client_ID>
<client_name> John Neale </client_name>
<client_address>
<client_address_street>
<client_address_street_1> Four Embarcadero Center </client_address_street_1>
<client_address_street_2> Suite 550 </client_address_street_2>
</client_address_street>
<client_address_city> San Francisco </client_address_city>
<client_address_state> CA </client_address_state>
<client_address_zip> 94111 </client_address_zip>
</client_address>
<client_phone_number> 8007892742 </client_phone_number>
<client_fax_number> 6307993834 </client_fax_number>
<client_email> jneal@statecollege.org </client_email>
<project>
<project_number> 6 </project_number>
<contact_person>
<contact_person_name> Tom Cyran </contact_person_name>
<contact_person_phone_number> 6305053700 </contact_person_phone_number>
<contact_person_fax_number> 6307993834 </contact_person_fax_number>
<contact_person_email> tcyran@slrhs.com </contact_person_email>
</contact_person>
<delivery_preference> Phone </delivery_preference>
</project>
</client>
</client_information>
，这也是我不断收到的错误http://i.imgur.com/Ztg0B.png
