自学Servlet_8_request(表单)

<form action="/day06/servlet/RequestDemo5" method="post">
    	用户名：<input type="text" name="username"><br/>
    	密码:<input type="password" name="password"><br/>
    	性别：
    		<input type="radio" name="gender" value="male">男
    		<input type="radio" name="gender" value="female">女
    		<br/>
    	城市：<select name="city">
    		 	<option value="bj">北京</option>
    		 	<option value="sh">上海</option>
    		 	<option vlaue="cs">长沙</option>
    		 </select><br/>
    		 
    	爱好：
    		<input type="checkbox" name="like" value="games">游戏
    		<input type="checkbox" name="like" value="movies">电影
    		<input type="checkbox" name="like" vlaue="song">听歌
    		<input type="checkbox" name="like" value="dance">跳舞
    		<br/>
    	简历：<textarea rows="5" cols="60" name="resume"></textarea><br/>
    	大头照：<input type="file" name="file"><br/>
    	
    		<input type="hidden" name="aaa" value="bbb"><br/>
    		
    		<input type="button" value="点点">
    		
    	<input type="submit" value="提交">
    </form>

servlet:
String username = request.getParameter("username");
		if(username!=null && !username.trim().equals("")){//都要这么写，防止之间访问
			System.out.println("username="+  username);
		}
		
		String password = request.getParameter("password");
		System.out.println("password="  + password);
		
		String gender = request.getParameter("gender");  //radio
		if(gender!=null){
			System.out.println("gender=" + gender );
		}
		String city = request.getParameter("city");
		System.out.println("city=" + city);
		
		String likes[] = request.getParameterValues("like");
		for(int i=0;likes!=null && i<likes.length;i++){
			System.out.println("like=" + likes[i]);
		}
		
		String resume = request.getParameter("resume");
		System.out.println("resume=" + resume);
		
		
		String value = request.getParameter("aaa");
		System.out.println("aaa=" + value);