BaseController的封装

来源：互联网发布：淘宝类的app难做么编辑：程序博客网时间：2024/06/11 19:43
import java.io.IOException;import java.io.PrintWriter;import java.io.UnsupportedEncodingException;import java.util.Enumeration;import java.util.HashMap;import java.util.Map;import javax.servlet.http.HttpServletRequest;import javax.servlet.http.HttpServletResponse;import javax.servlet.http.HttpSession;import org.springframework.web.context.request.RequestContextHolder;import org.springframework.web.context.request.ServletRequestAttributes;import org.springframework.web.servlet.ModelAndView; public class BaseController {  /** * 把浏览器参数转化放到Map集合中 * @param request * @return * @throws UnsupportedEncodingException */protected Map<String, Object> getParam(HttpServletRequest request) {        Map<String, Object> paramMap = new HashMap<String, Object>();        String method = request.getMethod();        Enumeration<?> keys = request.getParameterNames();        while (keys.hasMoreElements()) {            Object key = keys.nextElement();            if(key!=null){            if (key instanceof String) {                String value = request.getParameter(key.toString());                if("GET".equals(method)){//前台encodeURIComponent('我们');转码后到后台还是ISO-8859-1，所以还需要转码                     try {value =new String(value.getBytes("ISO-8859-1"),"UTF-8");} catch (UnsupportedEncodingException e) {e.printStackTrace();}                    }            paramMap.put(key.toString(), value);}            }         }        return paramMap;    }//将数据刷新写回web端protected void flushResponse(HttpServletResponse response, String responseContent) {PrintWriter writer = null;try {response.setCharacterEncoding("GBK");// 针对ajax中页面编码为GBK的情况，一定要加上以下两句response.setHeader("Cache-Control", "no-cache");response.setContentType("text/html;charset=UTF-8");writer = response.getWriter();if (responseContent==null || "".equals(responseContent) || "null".equals(responseContent)) {writer.write("");} else {writer.write(responseContent);}} catch (IOException e) {throw new RuntimeException(e);} finally {if (writer != null) {writer.flush();writer.close();}}}/** * 获取session对象 * @return */protected  HttpSession getSession(HttpServletRequest request){ HttpSession session =request.getSession(); return session;} /** * 返回列表分页的下角页码 * @param request * @param response * @return */public ModelAndView getPageNumberInfo(int total,int startIndex,int pageSize ,ModelAndView result) {//Math.ceil整数则为该整数，Math.ceil小数则为靠近大的整数        int current =  (int) Math.ceil((startIndex + 1.0) / pageSize);result.addObject("start", startIndex);result.addObject("limit", pageSize);result.addObject("total", total);result.addObject("current", current);if(total > 0) {int page =  (int) Math.ceil(total/ pageSize);double totald= total;if(totald/pageSize>total/pageSize){page =page +1;}result.addObject("page", page);int startPage = 0;int endPage = 0;if (page<8) {startPage = 1;endPage = page;} else {if (current<5) { //展示前6页startPage = 1;endPage = 6;//page>6?6:page; } else if (page-current<6) {//展示最后6页，例如：current=10 page=15   10-15startPage = page-5;endPage = page;} else {//current=20    18——22startPage = current - 2;endPage = current + 2;}}result.addObject("startPage", startPage);result.addObject("endPage", endPage);} else {result.addObject("page", 0);}return result;}}
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