是否手动渲染ModelAndView？

Question

我需要在控制器中手动呈现ModelAndView，以便将其放入JSON object中。如果我将整个ModelAndView对象传递给JSON，我会得到“找不到javassistlazyinitializer类的序列化器”异常，因为jackson不能正确处理惰性对象。谢谢

Answer 1

public class JSONView implements View {
    /**
     * Logger for this class
     */
    private static final Logger logger = Logger.getLogger(JSONView.class);

    private String contentType = "application/json";

    public void render(Map map, HttpServletRequest request, HttpServletResponse response)
        throws Exception {
    if(logger.isDebugEnabled()) {
        logger.debug("render(Map, HttpServletRequest, HttpServletResponse) - start");
    }

    JSONObject jsonObject = new JSONObject(map);
    PrintWriter writer = response.getWriter();
    writer.write(jsonObject.toString());

    if(logger.isDebugEnabled()) {
        logger.debug("render(Map, HttpServletRequest, HttpServletResponse) - end");
    }
    }

    public String getContentType() {
    return contentType;
    }

}

ModelAndView returnModelAndView = new ModelAndView(new JSONView(), model);