spring 容器静态获取HttpServletRequest/HttpServletResponse

星空寻流年2024-08-21 8:30

1、通过静态方法获取 HttpServletRequest

java 复制代码

 /**
     *  从DispatcherServlet中获取到当前的request
     * @return
     */
    public static HttpServletRequest getRequest() {
        // 从当前threadlocal中获取到
        ServletRequestAttributes servletRequestAttributes = (ServletRequestAttributes)RequestContextHolder.getRequestAttributes();
        return servletRequestAttributes.getRequest();
    }

2、通过静态方法获取 HttpServletResponse

java 复制代码

 /**
     *  从DispatcherServlet中获取到当前的response
     * @return
     */
    public static HttpServletResponse getResponse() {
        // 从当前threadlocal中获取到
        ServletWebRequest servletRequestAttributes = (ServletWebRequest)RequestContextHolder.getRequestAttributes();
        return servletRequestAttributes.getResponse();
    }

3、response 写出json数据

java 复制代码

/**
	 *   写出json数据，任意数据类型
	 * */
	public static void writeJsonToObj(HttpServletResponse response, Object obj) {
		response.setCharacterEncoding("UTF-8");  
	    response.setContentType("application/json; charset=utf-8");  
	    PrintWriter out = null;  
		try {
			 out = response.getWriter();  
			 out.write(JSONObject.toJSONString(obj));
			 out.flush();
		} catch (IOException e) {
			e.printStackTrace();
			throw new IllegalStateException("IO异常,:" + e.getMessage());
		} finally {
			if (out != null)
				out.close();
		}
	}