在專案中使用Spring框架時，我們可以使用一下String的一些工具類來輔助我們的開發。

ServletRequestUtils
1 所在包：package org.springframework.web.bind

2 使用
在Controller中手動獲取頁面引數時，可以藉助此類，如：

//平常獲取
String id = request.getParameter("id");

//ServletRequestUtils獲取 
String id= ServletRequestUtils.getStringParameter(request, "id");

3 一些方法

4 解析
以int的一組方法為例：

    public static Integer getIntParameter(ServletRequest request, String name)
            throws ServletRequestBindingException {

        if (request.getParameter(name) == null) {
            return null;
        }
        return getRequiredIntParameter(request, name);
    }


    public static
 
 int getIntParameter(ServletRequest request, String name, int defaultVal) {
        if (request.getParameter(name) == null) {
            return defaultVal;
        }
        try {
            return getRequiredIntParameter(request, name);
        }
        catch (ServletRequestBindingException ex) {
            return
 
 defaultVal;
        }
    }


    public static int[] getIntParameters(ServletRequest request, String name) {
        try {
            return getRequiredIntParameters(request, name);
        }
        catch (ServletRequestBindingException ex) {
            return new int[0];
        }
    }


    public static int getRequiredIntParameter(ServletRequest request, String name)
            throws ServletRequestBindingException {

        return INT_PARSER.parseInt(name, request.getParameter(name));
    }


    public static int[] getRequiredIntParameters(ServletRequest request, String name)
            throws ServletRequestBindingException {

        return INT_PARSER.parseInts(name, request.getParameterValues(name));
    }