使用bootstrapvalidator的remote验证经验

/*
     * 返回String类型的结果
     * 检查用户名的合法性,如果用户已经存在，返回false，否则返回true(返回json数据，格式为{"valid",true})
     */
    @RequestMapping(value = "/checkNameExistsMethod1", produces = "application/json;charset=UTF-8")
    public @ResponseBody
    String checkNameValidMethod1(@RequestParam String name) {
        boolean result = true;
        List<Employee> lstEmployees = employeeService.getAllEmployees();
        for (Employee employee : lstEmployees) {
            if (employee.getName().equals(name)) {
                result = false;
                break;
            }
        }
        Map<String, Boolean> map = new HashMap<>();
        map.put("valid", result);
        ObjectMapper mapper = new ObjectMapper();
        String resultString = "";
        try {
            resultString = mapper.writeValueAsString(map);
        } catch (JsonProcessingException e) {
            e.printStackTrace();
        }
        return resultString;
    }

{"valid":false} //表示不合法，验证不通过
{"valid":true} //表示合法，验证通过