package com.hx.common;

import com.hx.common.service.CommonService;
import com.hx.exception.ParamException;
import com.hx.exception.ServiceException;
import org.springframework.beans.propertyeditors.CustomDateEditor;
import org.springframework.web.bind.WebDataBinder;
import org.springframework.web.bind.annotation.InitBinder;
import org.springframework.web.context.request.RequestContextHolder;
import org.springframework.web.context.request.ServletRequestAttributes;
import org.springframework.web.context.request.WebRequest;

import javax.annotation.Resource;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpSession;
import java.text.DateFormat;
import java.text.SimpleDateFormat;
import java.util.Date;


/**公共初始化
 * @author ChenJiaHe
 * @Date 2020-06-11
 */

public class BaseController {

	@Resource
	protected CommonService commonService;
	/*请不要声明变量，会导致不安全，因为这个是单列*/

	//只需要加上下面这段即可，注意不能忘记注解
	@InitBinder
	public void initBinder(WebDataBinder binder, WebRequest request) {
		//转换日期 注意这里的转化要和传进来的字符串的格式一直 如2015-9-9 就应该为yyyy-MM-dd
		DateFormat dateFormat=new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
		binder.registerCustomEditor(Date.class, new CustomDateEditor(dateFormat, true));// CustomDateEditor为自定义日期编辑器
	}

	public HttpServletRequest getRequest() {
		//获取参数对象
		ServletRequestAttributes attributes = (ServletRequestAttributes) RequestContextHolder.getRequestAttributes();
		return attributes.getRequest();
	}

	public HttpSession getSession() {
		//获取参数对象
		return getRequest() .getSession();
	}

	/**
	 * 获取request里某个属性
	 * @param attrName 属性名称
	 * @return 对象
	 */
	public Object getRequestAttribute(String attrName)
	{
		return getRequest().getAttribute(attrName);
	}

	/**
	 * 设置一个request属性
	 * @param attrName 属性名称
	 * @param attrObject 属性值
	 */
	public void setRequestAttribute(String attrName, Object attrObject) {
		getRequest().setAttribute(attrName, attrObject);
	}

	/**
	 * 抛出服务异常
	 * @param msg 错误信息
	 */
	public void throwServiceException(String msg)
	{
		throw new ServiceException(msg);
	}

	/**
	 * 抛出参数异常
	 * @param msg 错误信息
	 */
	public void throwParamException(String msg)
	{
		throw new ParamException(msg);
	}

}