添加工具类

src/main/java/edu/nju/util/TransUtil.java

@@ -19,7 +19,7 @@ public class TransUtil {
     private static final String CERTAIN = "必现";
 
 
-    public int severityTransFromString(String str) {
+    public static int severityTransFromString(String str) {
         if (UNDETERMINED.equals(str)) {
             return 1;
         }
@@ -38,7 +38,7 @@ public class TransUtil {
         return 0;
     }
 
-    public int recurrentTransFromString(String str) {
+    public static int recurrentTransFromString(String str) {
         if (OTHER.equals(str)) {
             return 1;
         }
@@ -57,7 +57,7 @@ public class TransUtil {
         return 0;
     }
 
-    public String severityTransFromInt(int num) {
+    public static String severityTransFromInt(int num) {
         switch (num) {
             case 1:
                 return UNDETERMINED;
@@ -74,7 +74,7 @@ public class TransUtil {
         }
     }
 
-    public String recurrentTransFromInt(int num) {
+    public static String recurrentTransFromInt(int num) {
         switch (num) {
             case 1:
                 return OTHER;