[Fix] Fix the issue that genRouterCode incorrect logic results in @Import annotations getting overwritten

parser.go

@@ -459,13 +459,17 @@ func genRouterCode(pkgRealpath string) {
 			imports := ""
 			if len(c.ImportComments) > 0 {
 				for _, i := range c.ImportComments {
+					var s string
 					if i.ImportAlias != "" {
-						imports += fmt.Sprintf(`
+						s = fmt.Sprintf(`
 	%s "%s"`, i.ImportAlias, i.ImportPath)
 					} else {
-						imports += fmt.Sprintf(`
+						s = fmt.Sprintf(`
 	"%s"`, i.ImportPath)
 					}
+					if !strings.Contains(globalimport, s) {
+						imports += s
+					}
 				}
 			}
 
@@ -490,7 +494,7 @@ func genRouterCode(pkgRealpath string) {
             }`, filters)
 			}
 
-			globalimport = imports
+			globalimport += imports
 
 			globalinfo = globalinfo + `
     beego.GlobalControllerRouter["` + k + `"] = append(beego.GlobalControllerRouter["` + k + `"],