fix bugs

exam-work-api/src/main/java/cn/com/qmth/examcloud/service/examwork/api/ExamApi.java

@@ -37,8 +37,8 @@ public class ExamApi {
 
     @ApiOperation(value="按ID查询考试批次",notes = "ID查询")
     @GetMapping("/exam/{examId}")
-    public ResponseEntity<Exam> getExamById(@PathVariable Long id){
-        return examService.getExamById(id);
+    public ResponseEntity<Exam> getExamById(@PathVariable Long examId){
+        return examService.getExamById(examId);
     }
 
     @ApiOperation(value="新增考试批次",notes = "新增")