接口調用外部系統返回數據，本系統做數據分頁封裝

場景：

　　本系統用的Mybatis分頁插件PageHelper，調用了外部系統返回的數據為String類型的JSON串，數據量畢竟多，界面需要分頁展示。

解決思路：

      返回數據轉List,然后把多個List放到一個List里，然后在從這個List里進行分頁,前端只需要傳一個頁碼過來即可，

部分代碼如下：

Service代碼

ResponseMsg<AppResp> responseMsg = new ResponseMsg<>();

int currentPage = req.getCurrentPage();
int pageSize = req.getPageSize();

String str= "[{"id":1546051323216,"name":"TPCE測試流程"},{"id":1546051343822,"name":"TPC-DS測試流程"}]";//例子

List list = JSONArray.parseArray( str );

List<Object> objects = new ArrayList<>();
int num = (currentPage > 1 ? (currentPage - 1) * pageSize : 0);
assert list != null;
for (int i = 0; i < pageSize && i < list.size() - num; i++) {
    objects.add( list.get( num + i ) );
}

AppResp appResp = new AppResp();
appResp.setList( objects );
responseMsg.setResult( appResp );
responseMsg.setCurrentPage( currentPage );
responseMsg.setTotal( list.size() );

js代碼:

$scope.list = [];
$scope.currentPage = 1;
$scope.pageSize = 10;
$scope.getProcessList = function () {
    PARAM_BODY.currentPage = $scope.currentPage;
    PARAM_BODY.pageSize = $scope.pageSize;
    $http({
        method: 'POST',
        url: options.app_api + '/app/getProcessList',
        data: JSON.stringify(PARAM_BODY)
    }).success(function (data) {
        $scope.list = data.result.list;
        $scope.currentPage = data.currentPage;
        $scope.total = data.total;
    });
};