JSP运行原理-白红宇

JSP运行原理

阅读量：70 次

发布时间：2019-02-26

本文共 1798 字，大约阅读时间需要 5 分钟。

JSP?Java Server Pages???

JSP?Java Server Pages?????Java Server Pages???????Java ????????Java?????????????????????????Web???????????JSP????????Servlet????HTML???????????

JSP??????

JSP????????Servlet????????????Servlet????HTML??????????????Servlet????????????????????????HTML??????????????????????????????

????Servlet?????HTML??????????????????

@WebServlet("/a")public class PrintHtml extends HttpServlet {    @Override    protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {        resp.setContentType("text/html;charset=UTF-8");        PrintWriter writer = resp.getWriter();        writer.println("");        writer.println("");        writer.println("Title");        writer.println("");        writer.println("");        writer.println("");        writer.println("
   
   
   
    
    "+"????");         writer.println("
    
   
   
");        writer.println("");    }}

?????????HTML????????????????JSP??????????????

JSP???

JSP??????HTML?Java????JSP???????????

HTML??????????????????

Java??????<% ... %>?????Java????????????

JSP???<% ? </%> ????Java???<%! ? </%> ?????????????<%= ... %> ???????????

JSP??????????????????????????????????????????????

JSP???

JSP????Servlet????????????JSP????Tomcat????????????Java??????????????????HttpJspBase?????HttpServlet?????Servlet??????

???Tomcat?????org???????????

org/    myproject/        index.jsp ? ??? index.java ? index.class

?index.java?????????

public class index extends org.apache.jasper.runtime.HttpJspBase {    // ??????}

????????JSP?????Servlet?????????????????

JSP?Servlet???

???????????JSP?Servlet????????????JSP??????Servlet????Tomcat??????JSP?????????Java?????????Java Web?????????

?????JSP????HTML?Java???JSP???????????????????????????????????Tomcat????JSP?????Servlet??????????????????

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