history init

liuxiaolong

2019-05-09 0d1d88cdb668e75ea8609417ac18ae19947e9525

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package framework.mybatis.pageAction;
 
import java.util.HashMap;
import java.util.Map;
 
import javax.servlet.http.HttpServletRequest;
 
public class PageUtil {
    protected final static String PAGE_PARAM_KEY = "MYBATIS_PAGE_ACTION_PAGE_INFO_KEY";
    
    public final static String PARAM_COUNT_PER_PAGE = "__cpp__";
    
    public final static String PARAM_CURRENT_PAGE = "__cup__";
    
    protected static PageInfo getPageInfo(Map<String,Object> paramMap){
        return (PageInfo) paramMap.get(PAGE_PARAM_KEY);
    }
    
    /**
     * 得到查询条件map
     * @param request
     * @return
     */
    public static Map<String, Object> getPageSearchParamMap(
            HttpServletRequest request){
        return wrapPageSearchParamMap(request, null);
    }
    
    /**
     * 得到查询条件
     * @param request
     * @param param 可以为 null
     * @return
     */
    public static Map<String, Object> wrapPageSearchParamMap(
            HttpServletRequest request,
            Map<String,Object> param){
        PageInfo page = new PageInfo();
        page.request = request;
        
        int countPerPage= PageInfo.DEFAULT_COUNT_PER_PAGE;
        try{
            countPerPage = Integer.valueOf(request.getParameter(PARAM_COUNT_PER_PAGE));
        }catch(Throwable t){
            
        }
        
        int currentPage = 1;
        try{
            currentPage = Integer.valueOf(request.getParameter(PARAM_CURRENT_PAGE));
        }catch(Throwable t){
            
        }
        
        page.setCountPerPage(countPerPage);
        page.setPage(currentPage);
        
        if(param==null){
            param = new HashMap<String,Object>();
        }
        
        param.put(PAGE_PARAM_KEY, page);
        
        return param;
    }
}