Playframework 播放框架返回错误：找不到适合ok的方法（ArrayList<；String[]>；）]

我希望play framework将arraylist发送到我的android应用程序。所以我可以在android应用程序上查看列表。 但play框架无法返回ArrayList） 我怎样才能解决这个问题？ 多谢各位

public static Result get_LatestList() throws ClassNotFoundException,
        SQLException {
    String latestList = "";
    ArrayList<String[]> etList = new ArrayList<String[]>(); 

    MultipartFormData body = request().body().asMultipartFormData();
    String pageNumber = body.asFormUrlEncoded().get("pageNumber")[0];
    Connection conn = null;
    Statement stmt = null;
    ResultSet rs = null;

    Class.forName("com.mysql.jdbc.Driver");
    conn = DriverManager.getConnection("jdbc:mysql://localhost/iea_db",
            "rt", "yt");
    stmt = conn.createStatement();
    rs = stmt.executeQuery("select * from List_Table;");
    while (rs.next()) {
        String[] oneSet = new String[4];

        oneSet[0] = rs.getString("userName");
        oneSet[1] = rs.getString("idName");
        oneSet[2] = rs.getString("comment");
        oneSet[3] = rs.getString("rank");
        etList.add(oneSet);
    }

    conn.close();                   
    return ok(etList);
}

public static Result get_LatestList（）抛出ClassNotFoundException，
SQLException{
字符串latestList=“”；
ArrayList etList=新建ArrayList（）；
MultipartFormData body=request（）.body（）.asMultipartFormData（）；
字符串pageNumber=body.asFormUrlEncoded（）.get（“pageNumber”）[0]；
连接conn=null；
语句stmt=null；
结果集rs=null；
Class.forName（“com.mysql.jdbc.Driver”）；
conn=DriverManager.getConnection（“jdbc:mysql://localhost/iea_db",
“rt”、“yt”）；
stmt=conn.createStatement（）；
rs=stmt.executeQuery（“从列表中选择*）；
while（rs.next（））{
字符串[]oneSet=新字符串[4]；
oneSet[0]=rs.getString（“用户名”）；
oneSet[1]=rs.getString（“idName”）；
oneSet[2]=rs.getString（“注释”）；
oneSet[3]=rs.getString（“秩”）；
etList.add（oneSet）；
}
康涅狄格州关闭（）；
返回ok（etList）；
}

我找到了一个解决方案：使用Json 在play framework中，执行以下操作：

    ObjectNode result = Json.newObject();

    result.put("draw", Integer.valueOf(params.get("draw")[0]));
    result.put("recordsTotal", iTotalRecords);
    result.put("recordsFilter", iTotalDisplayRecords);

    return ok(result);

  @Override
    protected JSONObject doInBackground(String... _uri) {
        HttpClient httpClient = new DefaultHttpClient();
        HttpGet httpGet = new HttpGet(_uri[0]);
        try {
            HttpResponse httpResponse = httpClient.execute(httpGet);
            if (httpResponse.getStatusLine().getStatusCode() == HttpStatus.SC_OK) {
                ByteArrayOutputStream outputStream = new ByteArrayOutputStream();
                httpResponse.getEntity().writeTo(outputStream);
                outputStream.close();
                return new JSONObject(outputStream.toString());
            } else {
                httpResponse.getEntity().getContent().close();
                throw new IOException();
            }
        } catch (IOException e) {
            e.printStackTrace();
        } catch (JSONException e) {
            e.printStackTrace();
        }
        return null;
    }

在android中，执行以下操作：

    ObjectNode result = Json.newObject();

    result.put("draw", Integer.valueOf(params.get("draw")[0]));
    result.put("recordsTotal", iTotalRecords);
    result.put("recordsFilter", iTotalDisplayRecords);

    return ok(result);

  @Override
    protected JSONObject doInBackground(String... _uri) {
        HttpClient httpClient = new DefaultHttpClient();
        HttpGet httpGet = new HttpGet(_uri[0]);
        try {
            HttpResponse httpResponse = httpClient.execute(httpGet);
            if (httpResponse.getStatusLine().getStatusCode() == HttpStatus.SC_OK) {
                ByteArrayOutputStream outputStream = new ByteArrayOutputStream();
                httpResponse.getEntity().writeTo(outputStream);
                outputStream.close();
                return new JSONObject(outputStream.toString());
            } else {
                httpResponse.getEntity().getContent().close();
                throw new IOException();
            }
        } catch (IOException e) {
            e.printStackTrace();
        } catch (JSONException e) {
            e.printStackTrace();
        }
        return null;
    }

---

我找到了一个解决方案：使用Json 在play framework中，执行以下操作：

    ObjectNode result = Json.newObject();

    result.put("draw", Integer.valueOf(params.get("draw")[0]));
    result.put("recordsTotal", iTotalRecords);
    result.put("recordsFilter", iTotalDisplayRecords);

    return ok(result);

  @Override
    protected JSONObject doInBackground(String... _uri) {
        HttpClient httpClient = new DefaultHttpClient();
        HttpGet httpGet = new HttpGet(_uri[0]);
        try {
            HttpResponse httpResponse = httpClient.execute(httpGet);
            if (httpResponse.getStatusLine().getStatusCode() == HttpStatus.SC_OK) {
                ByteArrayOutputStream outputStream = new ByteArrayOutputStream();
                httpResponse.getEntity().writeTo(outputStream);
                outputStream.close();
                return new JSONObject(outputStream.toString());
            } else {
                httpResponse.getEntity().getContent().close();
                throw new IOException();
            }
        } catch (IOException e) {
            e.printStackTrace();
        } catch (JSONException e) {
            e.printStackTrace();
        }
        return null;
    }

在android中，执行以下操作：

    ObjectNode result = Json.newObject();

    result.put("draw", Integer.valueOf(params.get("draw")[0]));
    result.put("recordsTotal", iTotalRecords);
    result.put("recordsFilter", iTotalDisplayRecords);

    return ok(result);

  @Override
    protected JSONObject doInBackground(String... _uri) {
        HttpClient httpClient = new DefaultHttpClient();
        HttpGet httpGet = new HttpGet(_uri[0]);
        try {
            HttpResponse httpResponse = httpClient.execute(httpGet);
            if (httpResponse.getStatusLine().getStatusCode() == HttpStatus.SC_OK) {
                ByteArrayOutputStream outputStream = new ByteArrayOutputStream();
                httpResponse.getEntity().writeTo(outputStream);
                outputStream.close();
                return new JSONObject(outputStream.toString());
            } else {
                httpResponse.getEntity().getContent().close();
                throw new IOException();
            }
        } catch (IOException e) {
            e.printStackTrace();
        } catch (JSONException e) {
            e.printStackTrace();
        }
        return null;
    }

---

只是一个建议，但可能删除不相关的标签，只保留与您当前使用的版本（以及您可以证明这一点适用的版本）？抱歉，我将编辑它只是一个建议，但可能删除不相关的标签，只保留与您当前使用的版本（以及您可以证明这一点适用的版本）的标签对不起，我会编辑它