diff --git a/src/main/java/org/redkale/convert/json/JsonBytesWriter.java b/src/main/java/org/redkale/convert/json/JsonBytesWriter.java
index fd9d10795..e0a47e996 100644
--- a/src/main/java/org/redkale/convert/json/JsonBytesWriter.java
+++ b/src/main/java/org/redkale/convert/json/JsonBytesWriter.java
@@ -457,53 +457,50 @@ public class JsonBytesWriter extends JsonWriter implements ByteTuple {
         }
         for (int i = 0; i < len; i++) {
             char ch = value.charAt(i);
-            switch (ch) {
-                case '\n':
-                    bytes[curr++] = '\\';
-                    bytes[curr++] = 'n';
-                    break;
-                case '\r':
-                    bytes[curr++] = '\\';
-                    bytes[curr++] = 'r';
-                    break;
-                case '\f':
-                    bytes[curr++] = '\\';
-                    bytes[curr++] = 'f';
-                    break;
-                case '\b':
-                    bytes[curr++] = '\\';
-                    bytes[curr++] = 'b';
-                    break;
-                case '\t':
-                    bytes[curr++] = '\\';
-                    bytes[curr++] = 't';
-                    break;
-                case '\\':
-                    bytes[curr++] = '\\';
-                    bytes[curr++] = '\\';
-                    break;
-                case BYTE_DQUOTE:
-                    bytes[curr++] = '\\';
-                    bytes[curr++] = BYTE_DQUOTE;
-                    break;
-                default:
-                    if (ch < 0x80) {
+            if (ch < 14) {
+                switch (ch) {
+                    case '\n': // 10
+                        bytes[curr++] = '\\';
+                        bytes[curr++] = 'n';
+                        break;
+                    case '\r': // 13
+                        bytes[curr++] = '\\';
+                        bytes[curr++] = 'r';
+                        break;
+                    case '\t': // 8
+                        bytes[curr++] = '\\';
+                        bytes[curr++] = 't';
+                        break;
+                    case '\f': // 12
+                        bytes[curr++] = '\\';
+                        bytes[curr++] = 'f';
+                        break;
+                    case '\b': // 9
+                        bytes[curr++] = '\\';
+                        bytes[curr++] = 'b';
+                        break;
+                    default:
                         bytes[curr++] = (byte) ch;
-                    } else if (ch < 0x800) {
-                        bytes[curr++] = (byte) (0xc0 | (ch >> 6));
-                        bytes[curr++] = (byte) (0x80 | (ch & 0x3f));
-                    } else if (Character.isSurrogate(ch)) { // 连取两个
-                        int uc = Character.toCodePoint(ch, value.charAt(++i));
-                        bytes[curr++] = (byte) (0xf0 | (uc >> 18));
-                        bytes[curr++] = (byte) (0x80 | ((uc >> 12) & 0x3f));
-                        bytes[curr++] = (byte) (0x80 | ((uc >> 6) & 0x3f));
-                        bytes[curr++] = (byte) (0x80 | (uc & 0x3f));
-                    } else {
-                        bytes[curr++] = (byte) (0xe0 | (ch >> 12));
-                        bytes[curr++] = (byte) (0x80 | ((ch >> 6) & 0x3f));
-                        bytes[curr++] = (byte) (0x80 | (ch & 0x3f));
-                    }
-                    break;
+                        break;
+                }
+            } else if (ch == '"' || ch == '\\') {
+                bytes[curr++] = '\\';
+                bytes[curr++] = (byte) ch;
+            } else if (ch < 0x80) {
+                bytes[curr++] = (byte) ch;
+            } else if (ch < 0x800) {
+                bytes[curr++] = (byte) (0xc0 | (ch >> 6));
+                bytes[curr++] = (byte) (0x80 | (ch & 0x3f));
+            } else if (Character.isSurrogate(ch)) { // 连取两个
+                int uc = Character.toCodePoint(ch, value.charAt(++i));
+                bytes[curr++] = (byte) (0xf0 | (uc >> 18));
+                bytes[curr++] = (byte) (0x80 | ((uc >> 12) & 0x3f));
+                bytes[curr++] = (byte) (0x80 | ((uc >> 6) & 0x3f));
+                bytes[curr++] = (byte) (0x80 | (uc & 0x3f));
+            } else {
+                bytes[curr++] = (byte) (0xe0 | (ch >> 12));
+                bytes[curr++] = (byte) (0x80 | ((ch >> 6) & 0x3f));
+                bytes[curr++] = (byte) (0x80 | (ch & 0x3f));
             }
         }
         if (quote) {
diff --git a/src/main/java/org/redkale/convert/json/JsonCharsWriter.java b/src/main/java/org/redkale/convert/json/JsonCharsWriter.java
index ecd6d9fdc..e9b15bdda 100644
--- a/src/main/java/org/redkale/convert/json/JsonCharsWriter.java
+++ b/src/main/java/org/redkale/convert/json/JsonCharsWriter.java
@@ -388,38 +388,37 @@ public class JsonCharsWriter extends JsonWriter {
         }
         for (int i = 0; i < len; i++) {
             char ch = str.charAt(i);
-            switch (ch) {
-                case '\n':
-                    chars[curr++] = '\\';
-                    chars[curr++] = 'n';
-                    break;
-                case '\r':
-                    chars[curr++] = '\\';
-                    chars[curr++] = 'r';
-                    break;
-                case '\f':
-                    chars[curr++] = '\\';
-                    chars[curr++] = 'f';
-                    break;
-                case '\b':
-                    chars[curr++] = '\\';
-                    chars[curr++] = 'b';
-                    break;
-                case '\t':
-                    chars[curr++] = '\\';
-                    chars[curr++] = 't';
-                    break;
-                case '\\':
-                    chars[curr++] = '\\';
-                    chars[curr++] = ch;
-                    break;
-                case '"':
-                    chars[curr++] = '\\';
-                    chars[curr++] = ch;
-                    break;
-                default:
-                    chars[curr++] = ch;
-                    break;
+            if (ch < 14) {
+                switch (ch) {
+                    case '\n': // 10
+                        chars[curr++] = '\\';
+                        chars[curr++] = 'n';
+                        break;
+                    case '\r': // 13
+                        chars[curr++] = '\\';
+                        chars[curr++] = 'r';
+                        break;
+                    case '\t': // 8
+                        chars[curr++] = '\\';
+                        chars[curr++] = 't';
+                        break;
+                    case '\f': // 12
+                        chars[curr++] = '\\';
+                        chars[curr++] = 'f';
+                        break;
+                    case '\b': // 9
+                        chars[curr++] = '\\';
+                        chars[curr++] = 'b';
+                        break;
+                    default:
+                        chars[curr++] = ch;
+                        break;
+                }
+            } else if (ch == '"' || ch == '\\') {
+                chars[curr++] = '\\';
+                chars[curr++] = ch;
+            } else {
+                chars[curr++] = ch;
             }
         }
         if (quote) {
@@ -441,38 +440,37 @@ public class JsonCharsWriter extends JsonWriter {
             b1 = bytes[i];
             b2 = bytes[i + 1];
             char ch = (char) ((b2 == 0 && b1 >= 0) ? b1 : ((b1 & 0xff) | ((b2 & 0xff) << 8)));
-            switch (ch) {
-                case '\n':
-                    chars[curr++] = '\\';
-                    chars[curr++] = 'n';
-                    break;
-                case '\r':
-                    chars[curr++] = '\\';
-                    chars[curr++] = 'r';
-                    break;
-                case '\f':
-                    chars[curr++] = '\\';
-                    chars[curr++] = 'f';
-                    break;
-                case '\b':
-                    chars[curr++] = '\\';
-                    chars[curr++] = 'b';
-                    break;
-                case '\t':
-                    chars[curr++] = '\\';
-                    chars[curr++] = 't';
-                    break;
-                case '\\':
-                    chars[curr++] = '\\';
-                    chars[curr++] = ch;
-                    break;
-                case '"':
-                    chars[curr++] = '\\';
-                    chars[curr++] = ch;
-                    break;
-                default:
-                    chars[curr++] = ch;
-                    break;
+            if (ch < 14) {
+                switch (ch) {
+                    case '\n': // 10
+                        chars[curr++] = '\\';
+                        chars[curr++] = 'n';
+                        break;
+                    case '\r': // 13
+                        chars[curr++] = '\\';
+                        chars[curr++] = 'r';
+                        break;
+                    case '\t': // 8
+                        chars[curr++] = '\\';
+                        chars[curr++] = 't';
+                        break;
+                    case '\f': // 12
+                        chars[curr++] = '\\';
+                        chars[curr++] = 'f';
+                        break;
+                    case '\b': // 9
+                        chars[curr++] = '\\';
+                        chars[curr++] = 'b';
+                        break;
+                    default:
+                        chars[curr++] = ch;
+                        break;
+                }
+            } else if (ch == '"' || ch == '\\') {
+                chars[curr++] = '\\';
+                chars[curr++] = ch;
+            } else {
+                chars[curr++] = ch;
             }
         }
         if (quote) {
@@ -494,22 +492,22 @@ public class JsonCharsWriter extends JsonWriter {
             } else if (b == '\\') {
                 chars[curr++] = '\\';
                 chars[curr++] = '\\';
-            } else if (b < 32) {
-                if (b == '\n') {
+            } else if (b < 14) {
+                if (b == '\n') { // 10
                     chars[curr++] = '\\';
                     chars[curr++] = 'n';
-                } else if (b == '\r') {
+                } else if (b == '\r') { // 13
                     chars[curr++] = '\\';
                     chars[curr++] = 'r';
-                } else if (b == '\f') {
-                    chars[curr++] = '\\';
-                    chars[curr++] = 'f';
-                } else if (b == '\b') {
-                    chars[curr++] = '\\';
-                    chars[curr++] = 'b';
-                } else if (b == '\t') {
+                } else if (b == '\t') { // 8
                     chars[curr++] = '\\';
                     chars[curr++] = 't';
+                } else if (b == '\f') { // 12
+                    chars[curr++] = '\\';
+                    chars[curr++] = 'f';
+                } else if (b == '\b') { // 9
+                    chars[curr++] = '\\';
+                    chars[curr++] = 'b';
                 } else {
                     chars[curr++] = (char) b;
                 }