自己用的各种工具类(不喜勿喷)

1:List转Json

public static String list2JsonArray(List list) {

        StringBuffer str = new StringBuffer("[");

        if (list != null && list.size() > 0) {

            int len = list.size();

            Object map = null;



            for (int i = 0; i < len; i++) {

                map = list.get(i);

                if (i > 0) {

                    str.append(",");

                }

                str.append(JSONUtil.object2json(map));

            }

        }

        str.append("]");

        return str.toString();

    }

2:ajax向前端返回json字符串

//向前端返回json字符串

    public void outString(String json) {

        PrintWriter print = null;

        try {

            HttpServletResponse response;

            response = this.getResponse();

            response.setContentType("text/json;charset=UTF-8");

            response.setHeader("Cache-Control", "no-cache");

            response.setHeader("Pargma", "no-cache");

            response.setDateHeader("Expires", 0);

            print = this.getResponse().getWriter();

            print.write(json);

        } catch (IOException e) {

            e.printStackTrace();

        }

    }

先吃饭去了 其他的慢慢补充  嘿嘿