diff --git a/utils/basics.go b/utils/basics.go
index d737ba1..ffe7a73 100644
--- a/utils/basics.go
+++ b/utils/basics.go
@@ -180,6 +180,12 @@ func (this *AsciiStruct) ToString(params map[string]any) (result string) {
 		}
 	}
 
+	// 去除最后一个 &
+	text := item.String()
+	if len(text) > 0 {
+		text = text[:len(text)-1]
+	}
+
 	// 返回排序后的字符串
-	return item.String()
+	return text
 }
\ No newline at end of file
diff --git a/utils/cipher.go b/utils/cipher.go
index 46e28eb..e7c69e8 100644
--- a/utils/cipher.go
+++ b/utils/cipher.go
@@ -328,8 +328,8 @@ func (this *RSAStruct) Decrypt(privateKey, text string) (result *RSAResponse) {
 	return result
 }
 
-// PemPublicKey - 输出完整的 PEM 格式公钥证书
-func (this *RSAStruct) PemPublicKey(key string) (string, error) {
+// PublicPem - 输出完整的 PEM 格式公钥证书
+func (this *RSAStruct) PublicPem(key string) (cert string) {
 
 	// 创建 PEM 格式块
 	block := &pem.Block{
@@ -338,16 +338,14 @@ func (this *RSAStruct) PemPublicKey(key string) (string, error) {
 	}
 
 	// 生成完整的 PEM 证书字符串
-	var pemBuf bytes.Buffer
-	if err := pem.Encode(&pemBuf, block); err != nil {
-		return "", err
-	}
+	var PEM bytes.Buffer
+	if err := pem.Encode(&PEM, block); err != nil { return "" }
 
-	return pemBuf.String(), nil
+	return PEM.String()
 }
 
-// PemPrivateKey - 输出完整的 PEM 格式私钥证书
-func (this *RSAStruct) PemPrivateKey(key string) (string, error) {
+// PrivatePem - 输出完整的 PEM 格式私钥证书
+func (this *RSAStruct) PrivatePem(key string) (cert string) {
 
 	// 创建 PEM 格式块
 	block := &pem.Block{
@@ -356,10 +354,8 @@ func (this *RSAStruct) PemPrivateKey(key string) (string, error) {
 	}
 
 	// 生成完整的 PEM 证书字符串
-	var pemBuf bytes.Buffer
-	if err := pem.Encode(&pemBuf, block); err != nil {
-		return "", err
-	}
+	var PEM bytes.Buffer
+	if err := pem.Encode(&PEM, block); err != nil { return "" }
 
-	return pemBuf.String(), nil
+	return PEM.String()
 }
\ No newline at end of file
diff --git a/utils/struct.go b/utils/struct.go
index 538d34c..ec8bd14 100644
--- a/utils/struct.go
+++ b/utils/struct.go
@@ -177,3 +177,8 @@ func (this *StructStruct) Slice(obj any) (slice []any) {
 	}
 	return s
 }
+
+// ToStringMap - 将结构体转换为map[string]any
+func (this *StructStruct) ToStringMap(obj any) (result map[string]any) {
+	return cast.ToStringMap(Json.Encode(obj))
+}
\ No newline at end of file