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  • 表单元素值获取方式js及java方式

     
      1. 大家都知道我们在提交form的时候用了多种input表单。可是不是每一种input表单都是很简单的用Document.getElementById的方式就可以获取到的。有一些组合的form类似于checkbox或者radio或者select我们如何用javascript获取和在服务器中获取提交过来的参数呢?多说无用、上代码:  
      2. Jsp-html代码：  
      3.     <form action="input.do" name="formkk">  
      4.             <table>  
      5.                 <tbody>  
      6.                     <tr>  
      7.                           
      8.                         <td>text:</td>  
      9.                         <td>  
      10.                             <input type="text" name="text">  
      11.                         </td>  
      12.                     </tr>  
      13.                     <tr>  
      14.                           
      15.                         <td>password:</td>  
      16.                         <td>  
      17.                             <input type="password" name="pass">  
      18.                         </td>  
      19.                     </tr>  
      20.                     <tr>  
      21.                           
      22.                         <td>radio:</td>  
      23.                         <td>  
      24.                             <input type="radio" name="xingbie" value="1">  
      25.                             男  
      26.                             <input type="radio" name="xingbie" value="2">  
      27.                             女  
      28.                         </td>  
      29.                     </tr>  
      30.                     <tr>  
      31.                         <td>checkbox:</td>  
      32.                         <td>  
      33.                             足球:<input type="checkbox" name="hobby" value="1"  />  
      34.                             篮球:<input type="checkbox" name="hobby" value="2"  />  
      35.                             拍球:<input type="checkbox" name="hobby" value="3"  />  
      36.                             斗球:<input type="checkbox" name="hobby" value="4"  />  
      37.                         </td>  
      38.                     </tr>  
      39.                     <tr>  
      40.                         <td>hidden:</td>  
      41.                         <td>  
      42.                             <input type="hidden" value="123" name="hidden"/>  
      43.                         </td>  
      44.                     </tr>  
      45.                     <tr>  
      46.                         <td>option:</td>  
      47.                         <td>  
      48.                             <select name="opt" id="opt">  
      49.                             <option>1</option>  
      50.                             <option>2</option>  
      51.                             <option>3</option>  
      52.                             <option>4</option>  
      53.                             </select>  
      54.                               
      55.                         </td>  
      56.                 </tbody>  
      57.             </table>  
      58.             <input type="button" value="提交" onclick="javascript:check()"/>  
      59.         </form>  
      60.   
      61.   
      62. Javascript：  
      63. function check(){  
      64.               
      65.             var radio = document.getElementsByName("xingbie");  
      66.             var checkbox = document.getElementsByName("hobby");  
      67.             var select = document.getElementById("opt");  
      68.           
      69.             //获取select标签  
      70.             var index = select.selectedIndex;  
      71.             var text = select.options[index].text;  
      72.             var value = select.options[index].value;  
      73.               
      74.             //获取radio标签  
      75.             for(var i=0;i<xingbie.length;i++){  
      76.                 if(xingbie.item(i).checked){  
      77.                     var val = xingbie.item(i).getAttribute("value");  
      78.                     break;  
      79.                 }  
      80.                 continue;  
      81.             }  
      82.             //获取checkbox标签  
      83.             for(var i=0;i<hobbys.length;i++){  
      84.                 if(hobbys[i].checked){  
      85.                     alert(hobbys[i].value);  
      86.                 }  
      87.                 continue;  
      88.             }  
      89.               
      90.             //提交form表单  
      91.             document.formkk.submit();  
      92.               
      93.               
      94.         }  
      95.   
      96.   
      97.   
      98. Java：  
      99.     String[] hobbys = request.getParameterValues("hobby");  //checkbox  
      100.     String text = request.getParameter("text");             //text  
      101.     String password = request.getParameter("password"); //password  
      102.     String xingbie = request.getParameter("xingbie");       //radio  
      103.     request.getParameter("hidden");  
      104.     request.getParameter("opt");    //select 
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  • 原文地址：https://www.cnblogs.com/wangxy/p/4910451.html
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