Ajax实现select2 分页

1、前台

 //某一标准下的所有标签
        $('#sampleOriginal').select2({
            ajax: {
                url: '/sampleRecord/getSampleOriginals',
                dataType: 'json',
                delay: 250,
                data: function (params) {
                    return {
                        name: params.term,
                        page: params.page
                    };
                },
                processResults: function (data, params) {
                    params.page = params.page || 1;
                    return {
                        results: data.items,
                        pagination: {
                            more: (params.page * 30) < data.total
                        }
                    };
                },
                cache: true
            },
            escapeMarkup: function (markup) {
                return markup;
            },
            minimumInputLength: 1,
            templateSelection: function (item) {
                $("#sampleOriginal").val(item.id);

                return item.text;
            }
        });

2、controller

 /**
     * 得到样本来源
     *
     * @return
     */
    @RequestMapping("/getSampleOriginals")
    @ResponseBody
    public String getSampleOriginals(@RequestParam("name") String name, @RequestParam(name = "page", required = false, defaultValue = "1") Integer page, @RequestParam(name = "pageSize", required = false, defaultValue = "30") Integer pageSize) {
        return sampleRecordService.getOriginalResultObj(name, page, pageSize);
    }

3、service

    public String getOriginalResultObj(String name, Integer page, Integer pageSize) {
        JSONObject root = new JSONObject();
        int count = sampleRecordManager.getOriginalCountByName(name);
        root.put("total", count);
        List sampleOriginals = getSampleOriginals(name, page, pageSize);
        JSONArray children = new JSONArray();
        if (count == 0) {
            root.put("items", children);
            return root.toJSONString();
        }
        JSONObject child;
        for (SampleOriginal sampleOriginal : sampleOriginals) {
            child = new JSONObject();
            child.put("id", sampleOriginal.getPatientId());
            child.put("text", dealName(sampleOriginal.getName()) + "[ " + sampleOriginal.getGender() + " ]");
            children.add(child);
        }
        root.put("items", children);
        return root.toJSONString();
    }

4、manager

   @Autowired
    private JdbcTemplate mdcJdbcTemplate;

    /**
     * 得到样本来源
     *
     * @return
     */
    public List getSampleOriginals(String name, Integer page, Integer pageSize) {
        List sampleOriginals = new ArrayList<>();
        String sql = "SELECT patient_id,name,gender FROM patient WHERE name LIKE ? limit ?,? ";
        mdcJdbcTemplate.query(sql, new Object[]{"%"+name+"%", page, pageSize}, (rs, i) -> {
            SampleOriginal sampleOriginal = new SampleOriginal();
            sampleOriginal.setPatientId(rs.getString("patient_id"));
            sampleOriginal.setName(rs.getString("name"));
            sampleOriginal.setGender(rs.getString("gender"));
            sampleOriginals.add(sampleOriginal);
            return null;
        });
        return sampleOriginals;
    }

    public int getOriginalCountByName(String name) {
        List