Javaweb关于web.xml的相关配置信息

Javaweb关于web.xml的相关配置信息

初始页面

<!--  规定加载进入的初始页面-->
<welcome-file-list><welcome-file>/login.jsp</welcome-file>
</welcome-file-list>

配置Servlet

<!--配置Servlet-->
<servlet><servlet-name>UserLoginServlet</servlet-name><servlet-class>com.hz.servlet.UserLoginServlet</servlet-class><!-- 启动tomcat就加载Servlet--><load-on-startup>1</load-on-startup>
</servlet>
<servlet-mapping><servlet-name>UserLoginServlet</servlet-name><url-pattern>/userLoginServlet</url-pattern>
</servlet-mapping>

过滤器

<!--过滤器-->
<filter><filter-name>charEnCoding</filter-name><filter-class>com.hz.filter.CharEnCodingFilter</filter-class>
</filter>
<filter-mapping><filter-name>charEnCoding</filter-name><url-pattern>/*</url-pattern>
</filter-mapping>

配置乱码的公共参数

<!--  配置公共参数  -->
<context-param><param-name>charEncoding</param-name><param-value>utf-8</param-value>
</context-param>

//定义编码
private  String bm = ""; 
//Servlet初始化编码
@Override
public void init(ServletConfig config) throws ServletException {bm = config.getServletContext().getInitParameter("charEncoding");
}
//config.getServletContext() 获取xml中配置的公共参数

private String character = "GBK";
//Filter初始化编码
@Override
public void init(FilterConfig filterConfig) throws ServletException {character = filterConfig.getServletContext().getInitParameter("charEncoding");
}