smbms登录流程实现
摘要：
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posted @ 2023-01-19 03:48
随笔分类 - JAVA WEB
smbms项目搭建
摘要：数据库公共类代码，实际上就是将获取数据库连接以及增删改查资源关闭等操作进行封装，调用时就不必再进行重复操作 public class BaseDao { private static String url; private static String username; private static
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posted @ 2023-01-18 00:09
Filter实现权限拦截
摘要：登录页面 <html> <head> <title>Title</title> </head> <body> <h1 style="color: coral">登录</h1> <form action="${pageContext.request.contextPath}/servlet/login
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posted @ 2023-01-17 02:21
过滤器Filter
摘要：public class CharacterEncodingFilter implements Filter { @Override public void init(FilterConfig filterConfig) throws ServletException { System.out.pr
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posted @ 2023-01-16 17:41
JSP，JSTL标签
摘要：if判断标签 choose选择 for循环标签
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posted @ 2023-01-16 00:15
Session
摘要：Session还可以通过setAttribute()保存用户信息 req.setCharacterEncoding("utf-8"); resp.setCharacterEncoding("utf-8"); resp.setHeader("Content-type","text/html;chars
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posted @ 2023-01-14 17:47
Cookie讲解
摘要：给cookie设置有效期 显示访问时间 public class CookieDemo01 extends HttpServlet { @Override protected void doGet(HttpServletRequest req, HttpServletResponse resp) t
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posted @ 2023-01-13 22:31
Request应用
摘要：<body> <h1>登录</h1> <div > <form action="${pageContext.request.contextPath}/login" method="post"> 用户名：<input type="text" name="username"><br> 密码：<input
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posted @ 2023-01-13 16:15
response重定向
摘要：public class RedirectServlet extends HttpServlet { @Override protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletExce
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posted @ 2023-01-13 15:50
response验证码实现
摘要：public class ImageServlet extends HttpServlet { @Override protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletExcepti
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posted @ 2023-01-13 12:13
response下载
摘要：先通过FileInPutSteam的read(byte[])方法（单纯的read()方法是一次写入一个字节，返回值为asscm值，参数为字节数组的read方法返回值尾数组长度）写入数组，再通过resp的getOutPutStream创建一个文件输出流，通过write(byte[])方法将字节数组中的
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posted @ 2023-01-11 20:45
servletContext应用
摘要：配置初始化参数 <context-param> <param-name>url</param-name> <param-value>woshishabi:;</param-value> </context-param> 获取并输出 public class ServletDemo03 extends
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posted @ 2023-01-10 22:27
ServletContext
摘要：public class HelloServlet extends HttpServlet { @Override protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletExcepti
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posted @ 2023-01-08 23:24
servlet原理
摘要：service方法的两个参数，一个request接受从浏览器传过来的请求通过xml文件里指向的类里边的doget或者dopost方法接受，处理后返回一个respo参数
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posted @ 2022-12-13 09:04
servlet
摘要：一定注意hello前面的/ 配置tomcat 运行测试
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posted @ 2022-12-09 07:06
