Filter
web.xml中配置：
<配置>
<servlet>
<servlet-name>Filter</servlet-name>
<servlet-class>com.yy.servlet.web.servlet.Filter</servlet-class>
</servlet>
<!--这里是路径-->
<filter>
<filter-name>SetCharacterEncodingFilter</filter-name>
<filter-class>com.yy.servlet.web.servlet.Filter</filter-class>
<init-param>
<param-name>encode</param-name>
<param-value>UTF-8</param-value>
</init-param>
<init-param>
<param-name>param1</param-name>
<param-value>value在这里</param-value>
</init-param>
</filter>
<filter-mapping>
<filter-name>SetCharacterEncodingFilter</filter-name>
<url-pattern>/*</url-pattern>
<dispatcher>REQUEST</dispatcher> <!-- 没有配置dispatcher就是默认request方式的 -->
<dispatcher>FORWARD</dispatcher>
<dispatcher>ERROR</dispatcher>
<dispatcher>INCLUDE</dispatcher>
</filter-mapping>
javaScript: document.write("<h1>wang js c++</h1>");属于函数， 三个文本框： <html> <body> <script type = "text/javascript"> function testAlert(){ alert("警告框"); } //警告框 function testPrompt(){ prompt("询问框"); } //询问框 function testConfirm(){ alert("确认框"); } //确认框 </script> <button onclick = "testAlert();">警告框</button> <button onclick = "testPrompt();">询问框</button> <button onclick = "testConfirm();">确认框</button> </body> </html>
