一、指令标签

<%@ %> 放置在JSP头部，做说明性质的描述
<%@ page %>
<%@ taglib %>
uri=””
prefix=””
<%@ include %> 在JSP中引入已经写好的资源
如果在引入资源时出现乱码，则需要配置web.xml

  1. <jsp-config>
  2.    <jsp-property-group>
  3.        <description>JSPConfiguration</description>
  4.        <display-name>JSPConfiguration</display-name>
  5.        <url-pattern>*.html</url-pattern>
  6.        <el-ignored>false</el-ignored>
  7.        <page-encoding>UTF-8</page-encoding>
  8.        <scripting-invalid>false</scripting-invalid>
  9.    </jsp-property-group>
  10. </jsp-config>

二、代码标签

<%！ %>
<%= %>
<% %>

三、动作标签

jsp动作标签的作用：替代之前java程序创建对象，对象的赋值取值，请求转发及携带参数 语法：

  1. <jsp:useBean id="atm" class="类全名" scope="request">
  2.   Atm atm = (Atm)request.getAttribute("atm");
  3.   相当于
  4.   if(atm == null){
  5.     atm = Class.forName("类全名").newInstance();// 创建对象
  6.     request.setAttribute("atm");
  7.   }
  8. // scope="request"指定作用域(page,request,session,application)
  1. jsp:setProperty name="atm" property="aname" param="aname"
  1. jsp:getProperty name="atm" property="aname" param="aname"
  1. <jsp:forward page="index.jsp">
  2.   <jsp:param name="testkey" value="testvalue"/>
  3. </jsp:forward>
  1. <jsp:include page=""></jsp:include>