Javaweb关于web.xml的相关配置信息

森屿Serien2024-11-26 20:50

Javaweb关于web.xml的相关配置信息

初始页面

xml 复制代码

<!--  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

xml 复制代码

<!--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

xml 复制代码

<!--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

xml 复制代码

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

java 复制代码

//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

java 复制代码

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