servletConfig--代表当前servlet在web.xml中的配置信息
String getServletName() – 获取当前servlet在web.xml取的名字
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String |
getInitParameter(String name) 获取当前servlet指定名称的初始化参数的值 Returns a String containing the value of the named initialization parameter, or null if the parameter does not exist. |
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Enumeration |
getInitParameterNames()获取当前servlet所有初始化参数的名字组成的枚举 Returns the names of the servlet‘s initialization parameters as an Enumeration of String objects, or an empty Enumeration if the servlet has no initialization parameters. |
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ServletContext |
getServletContext() 获取代表当前web应用的servletContext对象 Returns a reference to the ServletContext in which the caller is executing |
配置web.xml 设置init-param
<servlet>
<servlet-name>SConfigServlet</servlet-name>
<servlet-class>com.itheima.SConfigServlet</servlet-class>
<init-param>
<param-name>name1</param-name>
<param-value>value1</param-value>
</init-param>
<init-param>
<param-name>encode</param-name>
<param-value>utf-8</param-value>
</init-param>
</servlet>
使用方法
ServletConfig config = this.getServletConfig();
//--获取当前Servlet 在web.xml中配置的名称
String sName = config.getServletName();
System.out.println(sName);
//--获取当前Servlet中配置的初始化参数
String value = config.getInitParameter("name2");
System.out.println(value);
Enumeration enumration = config.getInitParameterNames();
while(enumration.hasMoreElements()){
String name = (String) enumration.nextElement();
String value = config.getInitParameter(name);
System.out.println(name+":"+value);
}
时间： 2024-11-07 23:32:01