|NO.Z.00115|——————————|BigDataEnd|——|Java&MySQL.XML.V06|——|MySQL.v06|引入DTD约束|

一、引入DTD

### --- 引入DTD约束

——>        引入dtd文档到xml文档中,两种方式
——>        内部dtd：将约束规则定义在xml文档中
——>        外部dtd：将约束的规则定义在外部的dtd文件中
——>        本地：
——>        网络：

二、student.xml

<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE students SYSTEM "student.dtd">
<students>

    <student number="s1">
        <name>小斌</name>
        <age>22</age>
        <sex>男</sex>
    </student>

    <student number="s2">
        <name>广坤</name>
        <age>55</age>
        <sex>男</sex>
    </student>

</students>

三、xml语句

<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE students SYSTEM "E:\NO.Z.10000——javaproject\NO.H.00002.mysql\mysql\mysql.jdbc_task7\src\com\yanqi\xml02\dtd\student.dtd">
<students>
    <student number="S1">
        <name>长海</name>
        <age>20</age>
        <sex>男</sex>
    </student>

    <student number="S2">
        <name>大玲子</name>
        <age>18</age>
        <sex>女</sex>
    </student>

</students>

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Walter Savage Landor:strove with none,for none was worth my strife.Nature I loved and, next to Nature, Art:I warm'd both hands before the fire of life.It sinks, and I am ready to depart

                                                                                                                                                   ——W.S.Landor

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