@PostMapping("/v1/straddle") public Result<String> paging(@RequestBody @Valid final SealPagingDTO sealPagingDTO, final BindingResult bindingResult) { if (log.isInfoEnabled()) { log.info("开始调用骑缝章服务.applyNo:[{}],param:[{}]", sealPagingDTO.getApplyNo(), sealPagingDTO); } if (bindingResult.hasErrors()) { return Result.failure(bindingResult.getAllErrors() .get(0) .getDefaultMessage()); } // 开启耗时统计. final StopWatch sw = new StopWatch(); sw.start(); // 骑缝章. final SealResultDTO<SealPagingResultDTO> resultDTO = this.sealPagingService.sealPaging(sealPagingDTO); sw.stop(); if (log.isInfoEnabled()) { log.info("调用签章骑缝章服务调用结束.applyNo:[{}],result:[{}],耗时为:[{}]毫秒", sealPagingDTO.getApplyNo(), resultDTO, sw.getTotalTimeMillis()); } return Optional.of(resultDTO) .filter(res -> SealConstant.HTTP_SUCCESS_CODE.equals(res.getRespCode())) .map(res -> Result.success(res.getDatas())) .orElseGet(() -> Result.failure(resultDTO.getRespMsg())); } 第一return返回的是String类型，第二个return成功返回的是T类型，怎么修改Result<String>

要修改第一个返回类型为String的问题，可以将方法的返回类型改为Result<String>，并在return语句中使用Result.success()方法来封装返回结果。具体修改如下：

@PostMapping("/v1/straddle")
public Result<String> paging(@RequestBody @Valid final SealPagingDTO sealPagingDTO,
                            final BindingResult bindingResult) {

    if (log.isInfoEnabled()) {
        log.info("开始调用骑缝章服务.applyNo:[{}],param:[{}]", sealPagingDTO.getApplyNo(), sealPagingDTO);
    }
    if (bindingResult.hasErrors()) {
        return Result.failure(bindingResult.getAllErrors()
                .get(0)
                .getDefaultMessage());
    }
    // 开启耗时统计.
    final StopWatch sw = new StopWatch();
    sw.start();
    // 骑缝章.
    final SealResultDTO<SealPagingResultDTO> resultDTO = this.sealPagingService.sealPaging(sealPagingDTO);
    sw.stop();
    if (log.isInfoEnabled()) {
        log.info("调用签章骑缝章服务调用结束.applyNo:[{}],result:[{}],耗时为:[{}]毫秒",
                sealPagingDTO.getApplyNo(),
                resultDTO,
                sw.getTotalTimeMillis());
    }
    return Optional.of(resultDTO)
            .filter(res -> SealConstant.HTTP_SUCCESS_CODE.equals(res.getRespCode()))
            .map(res -> Result.success(res.getDatas()))
            .orElseGet(() -> Result.failure(resultDTO.getRespMsg()));
}

这样就将第一个return语句的返回类型修改为Result<String>了。