HttpServletRequest获取请求参数

通过HttpServletRequest接收请求来的参数，

get请求

public class controller1 {
    @RequestMapping(value = "/", method = {RequestMethod.POST})
    public String con001(HttpServletRequest request) throws IOException {
        Map<String, String> param = getAllRequestParam(request);
        String queryString = request.getQueryString();
        String user = request.getParameter("user");
        String pass = request.getParameter("pass");
        System.out.println(user);
        System.out.println(param);
        return "hello";
    }

post请求

先获取到参数名的集合，在组装到Map里

private Map<String, String> getAllRequestParam(final HttpServletRequest request) {
    Map<String, String> res = new HashMap<String, String>();
    Enumeration<?> temp = request.getParameterNames();
    if (null != temp) {
        while (temp.hasMoreElements()) {
            String en = (String) temp.nextElement();
            String value = request.getParameter(en);
            res.put(en, value);
        }
    }
    return res;
}