jsp是什么:
java server pages java服务器端页面 和Servlet一样 用于开发动态web
最大的特点：写jsp就像写html

添加依赖

  1.     <dependencies>
  2.         <!--SerVlet的依赖-->
  3.         <dependency>
  4.             <groupId>javax.servlet</groupId>
  5.             <artifactId>javax.servlet-api</artifactId>
  6.             <version>3.1.0</version>
  7.         </dependency>
  8.         <!--jsp依赖-->
  9.         <dependency>
  10.             <groupId>javax.servlet.jsp</groupId>
  11.             <artifactId>javax.servlet.jsp-api</artifactId>
  12.             <version>2.3.3</version>
  13.         </dependency>
  14.         <!--jsp表达式的依赖   jstl-->
  15.         <dependency>
  16.             <groupId>javax.servlet.jsp.jstl</groupId>
  17.             <artifactId>jstl-api</artifactId>
  18.             <version>1.2</version>
  19.         </dependency>
  20.         <!--标签库-->
  21.         <dependency>
  22.             <groupId>taglibs</groupId>
  23.             <artifactId>standard</artifactId>
  24.             <version>1.1.2</version>
  25.         </dependency>
  26.     </dependencies>

自定义错误页面

  1. <%--自定义500错误页面--%>
  3. <%@ page contentType="text/html;charset=UTF-8" language="java" %>
  4. <html>
  5. <head>
  6.     <title>Title</title>
  7. </head>
  8. <body>
  9. <h1>错误500</h1>
  10. </body>
  11. </html>

另种方式实现自定义

  • 标签

    1. <%@ page errorPage="error/error1.jsp" %>

  • 配置XML文件

    1.   <error-page>
    2.       <error-code>500</error-code>   <%--错误代码--%>
    3.       <location>/error/error1.jsp</location>  <%--自定义页面路径--%>
    4.   </error-page>

页面嵌套

  1.   <jsp:include page="路径"></jsp:include>

页面头

  1. <%@ page contentType="text/html;charset=UTF-8" language="java" %>
  2. <html>
  3. <head>
  4.     <title>Title</title>
  5.     <style>
  6.         #hander{
  7.             width: 800px;
  8.             height: 50px;
  9.             background-color: coral;
  10.         }
  11.         #a{
  12.             text-align: center;
  13.         }
  14.     </style>
  15. </head>
  16. <body>
  17. <div id="hander">
  18.     <h1 id="a">头部</h1>
  19. </div>
  20. </body>
  21. </html>

页面尾

  1. <%@ page contentType="text/html;charset=UTF-8" language="java" %>
  2. <html>
  3. <head>
  4.     <title>Title</title>
  5.     <style>
  6.         #b{
  7.             text-align: center;
  8.         }
  9.     </style>
  10. </head>
  11. <body>
  12. <h1 id="b">这是尾部</h1>>
  13. </body>
  14. </html>

页面嵌套

  1.   <jsp:include page="Hander.jsp"></jsp:include>
  2.   <div id="d1">
  3.       <jsp:forward page="jsp2.jsp">
  4.           <jsp:param name="name" value="Tom"/>
  5.           <jsp:param name="age" value="15"/>
  6.       </jsp:forward>
  7.   </div>
  8.   <jsp:include page="last.jsp"></jsp:include>

嵌套界面
image.png

页面跳转（带参数）

  1.       <jsp:forward page="jsp2.jsp">
  2.           <jsp:param name="name" value="Tom"/>
  3.           <jsp:param name="age" value="15"/>
  4.       </jsp:forward>

另一个页面接收

  1. <div id="d1">
  2.     <%
  3.         String name = request.getParameter("name");
  4.         String age = request.getParameter("age");
  5.         out.print(name+"-->"+age);
  6.     %>
  7. </div>