【Java】SonarLint 疑难语法修正
规范驼峰命名使用:
提示信息
Local variable and method parameter names should comply with a naming convention
代码片段
Map<String, List<ExcelExportColumn>> ColumnMap = new HashMap<>(16); ColumnMap.put("客诉权重KPI", exportColumnList); excelGenerator.generateExcelSheet(excelData, ColumnMap, "客诉权重KPI.xls", request, response);
绿色警告:
SonarLint: Rename this local variable to match the regular expression '^[a-z][a-zA-Z0-9]*$'.
使用正确的命名规则来更改变量即可
常量重复风险问题
提示信息:
String literals should not be duplicated
代码片段就不展示了,就是一些字符串常量出现过于频繁
IDEA中 双击选中任意其中一个,Ctrl + Alt + C 进行常量快速提取
红色警告:
SonarLint: Define a constant instead of duplicating this literal "首次重启数" 3 times. [+3 locations]
移除多余的泛型参数类型
提示信息:
The diamond operator ("<>") should be used
应该使用钻石操作符来表示
代码片段:
List<ExcelExportColumn> exportColumnList = new ArrayList<ExcelExportColumn>();
绿色警告:
SonarLint: Replace the type specification in this constructor call with the diamond operator ("<>").
删除对象的参数类型即可
不应该使用SOUT打印信息
提示信息
Standard outputs should not be used directly to log anything
代码片段
System.out.println("SXSSF Page Thread 导出数据,花费:" + second + "s/ " + millisEnd + "ms");
红色警告:
SonarLint: Replace this use of System.out or System.err by a logger.
替换成日志对象调用即可
日志对象的严谨调用
问题来自Controller层的日志打印调用:
/** * 投诉率统计(厂端) * 1.通过售后小区分组统计 * 2.通过经销商分组统计 * @param kpiComplaintRateQueryVO 查询参数 * @return 投诉率统计数据 */ @ApiOperation(value = "厂端投诉率统计维度查询") @PostMapping("/vcdc/ratestatis") public List<KpiComplaintRateVO> findKpiComplaintRateVOsByParams(@RequestBody KpiComplaintRateQueryVO kpiComplaintRateQueryVO) { logger.info("厂端投诉率统计传入查询参数kpiComplaintRateQueryVO={}", JSON.toJSONString(kpiComplaintRateQueryVO)); return kpiComplaintRateService.findKpiComplaintRateVOsByParams(kpiComplaintRateQueryVO); }
SonarLint提示红色警告:
SonarLint: Invoke method(s) only conditionally.
大概意思是,此方法的调用需要符合条件的前提
除了打印对象要做判空处理,比较难找到的是这个日志对象要需要做一个条件判断
解决方案参考爆栈网的处理:
https://stackoverflow.com/questions/44324597/sonarqube-invoke-methods-only-conditionally#
需要先判断log对象和打印对象
if(logger.isInfoEnabled() && us != null){ logger.info("Log this: {}", us.toString()); }
解决处理:
/** * 投诉率统计(厂端) * 1.通过售后小区分组统计 * 2.通过经销商分组统计 * @param kpiComplaintRateQueryVO 查询参数 * @return 投诉率统计数据 */ @ApiOperation(value = "厂端投诉率统计维度查询") @PostMapping("/vcdc/ratestatis") public List<KpiComplaintRateVO> findKpiComplaintRateVOsByParams(@RequestBody KpiComplaintRateQueryVO kpiComplaintRateQueryVO) { if (null != kpiComplaintRateQueryVO && logger.isInfoEnabled()) { logger.info("厂端投诉率统计传入查询参数kpiComplaintRateQueryVO={}", JSON.toJSONString(kpiComplaintRateQueryVO)); } return kpiComplaintRateService.findKpiComplaintRateVOsByParams(kpiComplaintRateQueryVO); }
日志格式化输出要求
提示信息:
"Preconditions" and logging arguments should not require evaluation
Printf-style format strings should be used correctly
代码片段:
logger.info("SXSSF Page Thread 导出数据,花费:" + second + "s/ " + millisEnd + "ms");
红色警告:
SonarLint: Use the built-in formatting to construct this argument.
SonarLint: Format specifiers should be used instead of string concatenation.
解决语法:
String format = String.format("SXSSF Page Thread 导出数据,花费:%s s/ %s ms", second, millisEnd);
logger.info(format);
Controller映射路径简化声明
提示信息:
Composed "@RequestMapping" variants should be preferred
应首选组合的“@RequestMapping”变体
代码片段:
@RequestMapping(value = "/selectKPIWeight", method = RequestMethod.POST)
更改为:
@PostMapping("/selectKPIWeight")
绿色警告:
SonarLint: Replace "@RequestMapping(method = RequestMethod.POST)" with "@PostMapping"