Javaweb获取表单数据的多种方式-创新互联

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Javaweb获取表单数据的几种方式

一、通过键值对的形式获取表单数据

getParameter(String name)：通过key，返回一个value。
getParameterValues(String name)：通过key返回一个string数组(多个值)
getParameterNames():返回form表单中的所有key值。

下面介绍通过键值对获取form表单数据的数据的方法：

@WebServlet({ "/FormServlet", "/form" })
public class FormServlet extends HttpServlet {
 private static final long serialVersionUID = 1L;

 public FormServlet() {
 super();
 }

 protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {

 response.setContentType("text/json;charset=utf-8");

 PrintWriter out = response.getWriter();

 Enumeration paramNames = request.getParameterNames();

 while (paramNames.hasMoreElements()) {
 String name = paramNames.nextElement();

 String[] values = request.getParameterValues(name);

 if(values!=null && values.length>0){
 StringBuilder builder = new StringBuilder(); 
 for (int i = 0; i < values.length; i++) {
  builder.append(values[i]+" ");
 }
 out.println(name+" : "+builder.toString());
 }
 }
 }

 protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
 doGet(request, response);
 }

}