Question

我正在尝试为jqgrid创建JSON对象。数据被添加但正确但第二条记录被覆盖。

 ArrayList resList = connect.statement_query(sql, para);

            jsonObject = new JSONObject();

            jsonObject.put("total", resList.size()/para.length);
            jsonObject.put("page", 1);
            jsonObject.put("records", resList.size()/para.length);

            JSONArray cellArray = new JSONArray();
            JSONArray cell = new JSONArray();
            JSONObject cellObj = new JSONObject();

            for (int i = 0; i < resList.size(); i += para.length) {
                cellObj.put("id", resList.get(i));

                JSONArray temp=new JSONArray();
                temp.add(resList.get(i));
                temp.add(resList.get(i + 1));
                temp.add(resList.get(i + 2));
                temp.add(resList.get(i + 3));
                temp.add(resList.get(i + 4));

                cell=temp;
                cellObj.put("cell", cell);
                System.out.println("Cell Obj: "+cellObj.toJSONString());
                cellArray.add(cellObj);
                System.out.println("Cell Array: "+cellArray.toJSONString());
                //cellObj.clear();
                temp.clear();
            }
            System.out.println("Cell Array-Out: "+cellArray);
            jsonObject.put("rows", cellArray);

结果如下：

Cell Obj: {"id":"1000","cell":["1000","BE6K","vshekhar","2014-06-02","N\/A"]}
Cell Array: [{"id":"1000","cell":["1000","BE6K","vshekhar","2014-06-02","N\/A"]}]
Cell Obj: {"id":"1001","cell":["1001","BOA","maahamad","2013-05-01","N\/A"]}
Cell Array: [{"id":"1001","cell":["1001","BOA","maahamad","2013-05-01","N\/A"]},{"id":"1001","cell":["1001","BOA","maahamad","2013-05-01","N\/A"]}]
Cell Array-Out: [{"id":"1001","cell":[]},{"id":"1001","cell":[]}]

为什么Cell Array会被第二条记录覆盖？为什么它会在循环中变得空白？如何克服它？

Answer 1

1）对象重写 -

您需要将cellObj重新信号化为for循环。

for（int i = 0; i＆lt; resList.size（）; i + = para.length）{
cellObj = new JSONObject（）;

2）让细胞空白 -

你正在通过'temp.clear（）;'清除临时Cell对象引用temp，temp被清除，这就是获取空白数据的原因。

你可以删除temp.clear（）代码。

JSONArray被覆盖了

1 个答案: