filter

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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>

<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> 
  <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>

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