servlet request.setParameters 方法 自创

由于需求需要，，，，像request.setParameters 一样的方法。所以了，，，，，，简单的写了一个实现方法

/**    * 设置Parameters 的值    * @param key    * @param val    */    public void setParameters(String key,String val){    Map m = getRequest().getParameterMap();java.lang.reflect.Field lockedField;try {lockedField = m.getClass().getDeclaredField("locked");lockedField.setAccessible(true);//System.out.println(lockedField.get(m));lockedField.set(m, false);//System.out.println(lockedField.get(m));m.put(key, val);} catch (Exception e) {log.error(e.getMessage(), e);}    }

   

public void doFilter(ServletRequest servletRequest,ServletResponse servletResponse, FilterChain arg2)throws IOException, ServletException {HttpServletRequest request = (HttpServletRequest) servletRequest;HttpServletResponse response = (HttpServletResponse) servletResponse;//StringBuffer buffer=request.getRequestURL();try {ParameterRequestWrapper parameterRequestWrapper = new ParameterRequestWrapper(request);arg2.doFilter(parameterRequestWrapper, servletResponse);} catch (Exception e) {log.error(e.getLocalizedMessage(), e);request.setAttribute("exceptionMsg", e);request.getRequestDispatcher(errorPage).forward(request, response);}}

 

public class ParameterRequestWrapper extends HttpServletRequestWrapper {public ParameterRequestWrapper(HttpServletRequest request) {super(request);}public String getParameter(String name) {String v = super.getParameter(name);if(v == null){v = (String)getParameterMap().get(name);}    return v;}}