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   ArrayList<weather> lists=new ArrayList<weather>();

在数据传输的，或者将result打印出来以后出现乱码的现象，结果是：

[{"data":"16\u65e5\uff08\u5468\u4e00\uff09","tem":"19\u2103/15\u2103","wea":"\u9634\u8f6c\u591a\u4e91","win":"\u4e1c\u5317\u98ce\u00203\u002d4\u7ea7"},{"data":"16\u65e5\uff08\u5468\u4e00\uff09","tem":"19\u2103/15\u2103","wea":"\u9634\u8f6c\u591a\u4e91","win":"\u4e1c\u5317\u98ce\u00203\u002d4\u7ea7"},{"data":"16\u65e5\uff08\u5468\u4e00\uff09","tem":"19\u2103/15\u2103","wea":"\u9634\u8f6c\u591a\u4e91","win":"\u4e1c\u5317\u98ce\u00203\u002d4\u7ea7"},{"data":"16\u65e5\uff08\u5468\u4e00\uff09","tem":"19\u2103/15\u2103","wea":"\u9634\u8f6c\u591a\u4e91","win":"\u4e1c\u5317\u98ce\u00203\u002d4\u7ea7"},{"data":"16\u65e5\uff08\u5468\u4e00\uff09","tem":"19\u2103/15\u2103","wea":"\u9634\u8f6c\u591a\u4e91","win":"\u4e1c\u5317\u98ce\u00203\u002d4\u7ea7"},{"data":"16\u65e5\uff08\u5468\u4e00\uff09","tem":"19\u2103/15\u2103","wea":"\u9634\u8f6c\u591a\u4e91","win":"\u4e1c\u5317\u98ce\u00203\u002d4\u7ea7"},{"data":"16\u65e5\uff08\u5468\u4e00\uff09","tem":"19\u2103/15\u2103","wea":"\u9634\u8f6c\u591a\u4e91","win":"\u4e1c\u5317\u98ce\u00203\u002d4\u7ea7"}]

可能是json数据格式问题，

我是这样接解决的：在前端设置一个回调函数，

String jsonp=request.getParameter("callbackparam");

JSONArray jsonArray=JSONArray.fromObject(lists);

 String result=jsonArray.toString();

writer.write(jsonp+"("+result+")");

然后通过回调函数将json对象带回去，结果为：

1. 0:{data: "16日（周一）", tem: "19℃/15℃", wea: "阴转多云", win: "东北风 3-4级"}
2. 1:{data: "16日（周一）", tem: "19℃/15℃", wea: "阴转多云", win: "东北风 3-4级"}
3. 2:{data: "16日（周一）", tem: "19℃/15℃", wea: "阴转多云", win: "东北风 3-4级"}
4. 3:{data: "16日（周一）", tem: "19℃/15℃", wea: "阴转多云", win: "东北风 3-4级"}
5. 4:{data: "16日（周一）", tem: "19℃/15℃", wea: "阴转多云", win: "东北风 3-4级"}
6. 5:{data: "16日（周一）", tem: "19℃/15℃", wea: "阴转多云", win: "东北风 3-4级"}
7. 6:{data: "16日（周一）", tem: "19℃/15℃", wea: "阴转多云", win: "东北风 3-4级"}