Servlet Web
1.ServletContext HttpServlet Session Cookie ServletConfig HttpServletRequest HttpServletResponse ServletRequest ServletResponse
(1) ServletContext : getServletContext().setAttribute() .. addFilter addListner addServlet ...getContextPath()
(2) HttpServlet:
public class DemoServlet implements HttpServlet{
doGet(httpservletrequest, httpservletresponse){};
doPost(httpservletrequest,httpservletresponse){};
}
(3)Session: 创建 使用 保存 销毁
request.getSession().setAttribute(key,value)
request.getSession().invalidate();
request.getSession().removeAttribute()；
setMaxInactiveInterval(int second);
(4) Cookie: 创建 使用 发送 保存
request.getCookies()读取Cookies
Cookie cookie=new Cookie(name,value);
response.addCookie(cookie );
(5) request response 请求header body
request.getContentType();
request.setCharacterEncoding("utf-8")
request.getParameter(name)
response.setContentType()
response.setCharacterEncoding()
request.getRequestDispatch("xxx.html").forward(request,response) 请求页面跳转，地址不变，传递数据？
response.sendRedirect(“xxx.html”) 响应跳转页面
附： Propertites prop=new Properties();
request.getContextServlet().getResourceAsStream() getResourceRealPath()
prop.load(inputStream)
prop.get(name);
response.getWriter()
response.getOutputStream()
下载文件请求头:setHeader("Content-Disposition", "attachment;fileName)
2.Filter:
public class DemoFilter implements Filter{
init(){..... }
doFilter(req,res,FilterChain){。。。。。}；
destroy(){....};
}
3.Interceptor:
public class DemoInterceptor implements HandlerInterceptor{
}
4.Listener :
- 对象自身的创建和销毁的监听器
- 对象中属性的创建和消除的监听器
- session中的某个对象的状态变化的监听器
- 对象自身的创建和销毁的监听器
- 对象中属性的创建和消除的监听器
- session中的某个对象的状态变化的监听器
- ServletContext对象监听器
- HttpSession对象监听器
- ServletRequest对象监听
5. Java1.图片创建 2.创建图片笔刷 3.用笔刷绘制内容 4.ImageIO
6.JDBC :
1.mysql.url username password
2.载入驱动jar driver
3.连接mysql connection jdbcManager.getConnection()
4.preparedStament(sql)===>ResultSet
7.
