fix bugs

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

@@ -257,10 +257,10 @@ public class ExamStudentService {
 		    	predicates.add(cb.equal(root.get("exam").get("id"),examCriteria.getExam().getId()));
 		    }
 		    if(null!=examCriteria.getName()){
-		    	predicates.add(cb.like(root.get("name"),examCriteria.getName()));
+		    	predicates.add(cb.like(root.get("name"),"%"+examCriteria.getName()+"%"));
 		    }
 		    if(null!=examCriteria.getStudentCode()){
-		    	predicates.add(cb.like(root.get("studentCode"),examCriteria.getStudentCode()));
+		    	predicates.add(cb.like(root.get("studentCode"),"%"+examCriteria.getStudentCode()+"%"));
 		    }
 		    if(null!=examCriteria.getFinished()){
 		    	predicates.add(cb.equal(root.get("finished"),examCriteria.getFinished()));