CMS项目文档.java.需求分析.docVIP

1用户登录 1.1需求 1.2sql准备 create table t_user(id int primary key auto_increment ,username varchar(20),password varchar(20),status int ,name varchar(50)); 1.3初始化参数配置 1.servlet初始化参数配置 仅在该servelt中有效 servlet servlet-nameUserServlet/servlet-name servlet-classorg.leadfar.cms.backend.servlet.UserServlet/servlet-class init-param param-nameisSupportCheckCode/param-name param-value0/param-value /init-param /servlet Java程序读取 isSupportCheckCode=1.equals(config. getInitParameter(isSupportCheckCode))?true:false; 2.全局应用初始化参数配置 在所有的servet和jsp中均可读取 context-param param-nameisSupportCheckCode/param-name param-value0/param-value /context-param Java程序读取 isSupportCheckCode=1.equals(config.getServletContext().getInitParameter(isSupportCheckCode))?true:false; 1.4Fiter(过滤器) 1.Filter是一个特殊的Servlet 2.Filter是AOP（Oritend Aspected Programming）思想的一种实现，是对原WEB请求路线实施的干预,支持热插拔 3.可以配置多个Filter,执行顺序将根据web.xml中配置顺序 4.定义Filter只需要定义一个普通的java类，实现Filter接口 public class EncodeFilter implements Filter { private String encode; public void destroy() { // TODO Auto-generated method stub } public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain) throws IOException, ServletException { request.setCharacterEncoding(encode); response.setCharacterEncoding(encode); //一定要加这一句 //System.out.println(before); chain.doFilter(request, response); //System.out.println(after); } public void init(FilterConfig config) throws ServletException { encode=config.getInitParameter(encode); } } 5.配置Filter filter filter-nameParamsFilter/filter-name filter-classorg.leadfar.cms.backend.servlet.EncodeFilter/filter-class init-param param-nameencode/param-name param-valueUTF-8/param-value /init-param /filter filter-mapping filter-nameParamsFilter/filter-name url-pattern/*/url-pattern /filter-mapping 6.Url-pattern 1./* 表示根路径下及其所有目录下的所有资源 2./backend/* 3.*.jsp 所有的以jsp为后缀