Servlet中获得初始化的参数值

​
import javax.servlet.ServletConfig;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.util.Enumeration;

public class LoadOnServlet extends HttpServlet {
    @Override
    public void init(ServletConfig config) throws ServletException {
        // 从servlet中获得初始化的参数值
        String username = config.getInitParameter("username");
        System.out.println(username);
        // 获得所有的参数名
        Enumeration names = config.getInitParameterNames();
        while (names.hasMoreElements()) {
            String s = names.nextElement();
            String initParameter = config.getInitParameter(s);
            System.out.println(initParameter);
            System.out.println(s);
        }
    }

    @Override
    protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
        System.out.println("goGet被调用");
        resp.getOutputStream().write("doget被调用00".getBytes());
    }

    @Override
    protected void doPost(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {

    }
}

​

    
        loadonServlet
        LoadOnServlet
        
        
            username
            123456
        
        
            password
            123456
        
    
    
    
        loadonServlet
        /loadon