controller接收前端参数的几种方式

1.直接以对象的形式接收：

@RequestMapping(value = "/getTicketList", produces = "application/json;charset=UTF-8", method = RequestMethod.POST)
@ApiOperation(value = "获取工单列表", notes = "获取工单列表")
@ResponseBody
public CommonResultBO getTicketList(@RequestBody TicketInfoVO ticketInfoVO) {
    return ticketInfoService.selectTicketInfo(ticketInfoVO);
}

public CommonResultBO selectTicketInfo(TicketInfoVO ticketInfoVO) { // 得到对象后直接解析get值即可
    log.info("selectTicketInfo begin.");
    // 获取参数
    String ticketName = ticketInfoVO.getTicketName();
    List<String> ticketTypesList = ticketInfoVO.getTicketTypes();
    List<String> statusList = ticketInfoVO.getStatus();
    List<String> principalsList = ticketInfoVO.getPrincipals();
    List<String> prioritiesList = ticketInfoVO.getPriorities();
    String date = ticketInfoVO.getDate();
}

2.接收以@PequestParam注解修饰的参数，即跟在url后面的参数：/operationLog/getTicketById?id=18

@RequestMapping(value = "/getTicketById", method = RequestMethod.GET)
@ApiOperation(value = "根据id获取工单", notes = "根据id获取工单")
@ResponseBody
public CommonResultBO getTicketById(@RequestParam String id) { // 获取参数后直接传递即可
    return ticketInfoService.selectTicketById(id);
}

3.JSONObject形式：只能在POST请求方式下使用

@RequestMapping(value = "/processTicket", method = RequestMethod.POST)
@ApiOperation(value = "处理工单", notes = "工单处理")
@ResponseBody
public CommonResultBO processTicket(@RequestBody JSONObject request) { 
    log.info("processTicket begin.");
    String id = request.getString("id"); // getString()方法获取参数，也有其它getxxx()方法用来获取不同类型的参数。
    String reason = request.getString("reason");
    String solution = request.getString("solution");
    String processResult = request.getString("processResult");
    String remark = request.getString("remark");
    log.info("processTicket end.");
    return ticketInfoService.updateResultInfo(id, reason, solution, processResult, remark);
}

4.MultipartHttpServletRequest 多用于传递文件，和文件+参数混合的请求，十分方便。

@RequestMapping(value = "/editTicket", method = RequestMethod.POST)
@ApiOperation(value = "编辑工单", notes = "编辑工单")
@ResponseBody
public CommonResultBO editTicket(MultipartHttpServletRequest request) {
    log.info("editTicket begin.");
    try {
        TicketInfo ticketInfo = getTicketInfo(request);
        // 编辑信息
        return ticketInfoService.updateTicketInfo(ticketInfo);
    } catch (Exception exc) {
        exc.printStackTrace();
        log.error("editTicket error: " + exc.getMessage());
        return CommonResultBO.init(null, -1, "editTicket failed.");
    }
}

private TicketInfo getTicketInfo(MultipartHttpServletRequest request) {
    String ticketInfos = request.getParameter("ticketInfos"); // 根据参数名称获取参数 这里是获取了json字符串
    List<MultipartFile> files = request.getFiles("file");  // 根据参数名称获取参数 这里是获取了文件集合
    // 保存工单文件
    String path;
    path = this.readFile(files); // 读取MultipartFile类型文件
    // setFilePath
    TicketInfo ticketInfo = JSONObject.parseObject(ticketInfos, TicketInfo.class); // 得到json字符串后转换成实体类对象
    ticketInfo.setFilePath(path);
    return ticketInfo;
}

private String readFile(List<MultipartFile> files) { // 读取文件
    log.info("begin to read file.");
    List<String> paths = new ArrayList<>();
    for (MultipartFile file : files) {
        String path;
        try {
            // 获取文件名
            String fileName = file.getOriginalFilename();
            // 获取文件的后缀名
            String suffixName = fileName.substring(fileName.lastIndexOf("."));
            // 文件上传后的路径
            String filePath = "D:\\Download\\file\\";
            path = filePath + fileName;
            File dest = new File(path);
            // 检测是否存在目录
            if (!dest.getParentFile().exists()) {
                dest.getParentFile().mkdirs();
            }
            // 写入文件
            file.transferTo(dest);
        } catch (IOException exception) {
            exception.printStackTrace();
            log.error("createTicket error, file transfer error: " + exception.getMessage());
            return null;
        }
    }
    return String.join(",", path);
}

持续完善…