validate support single quote, for issue #2059

core/src/main/java/com/alibaba/fastjson2/JSON.java

@@ -3275,6 +3275,26 @@ static boolean isValid(String text) {
         }
     }
 
+    /**
+     * Verify that the json string is legal json text
+     *
+     * @param text the specified string will be validated
+     * @param features the specified features is applied to parsing
+     * @return {@code true} or {@code false}
+     */
+    static boolean isValid(String text, JSONReader.Feature... features) {
+        if (text == null || text.isEmpty()) {
+            return false;
+        }
+
+        try (JSONReader jsonReader = JSONReader.of(text, JSONFactory.createReadContext(features))) {
+            jsonReader.skipValue();
+            return jsonReader.isEnd() && !jsonReader.comma;
+        } catch (JSONException error) {
+            return false;
+        }
+    }
+
     /**
      * Verify that the json char array is legal json text
      *
@@ -3379,6 +3399,21 @@ static boolean isValid(byte[] bytes) {
         }
     }
 
+    /**
+     * Verify that the json byte array is legal json text
+     *
+     * @param bytes the specified array will be validated
+     * @param charset the specified charset of the bytes
+     * @return {@code true} or {@code false}
+     */
+    static boolean isValid(byte[] bytes, Charset charset) {
+        if (bytes == null || bytes.length == 0) {
+            return false;
+        }
+
+        return isValid(bytes, 0, bytes.length, charset);
+    }
+
     /**
      * Verify that the json byte array is a legal JsonArray
      *
@@ -3407,7 +3442,7 @@ static boolean isValidArray(byte[] bytes) {
      * @param bytes the specified array will be validated
      * @param offset the starting index of array
      * @param length the specified length of array
-     * @param charset the specified charset of the stream
+     * @param charset the specified charset of the bytes
      * @return {@code true} or {@code false}
      */
     static boolean isValid(byte[] bytes, int offset, int length, Charset charset) {

core/src/main/java/com/alibaba/fastjson2/JSONReaderUTF16.java

@@ -4313,6 +4313,7 @@ public final void skipValue() {
                 }
                 break;
             }
+            case '\'':
             case '"': {
                 skipString();
                 break;

core/src/main/java/com/alibaba/fastjson2/JSONReaderUTF8.java

@@ -5448,9 +5448,10 @@ protected void readString0() {
 
     @Override
     public final boolean skipName() {
-        if (ch != '"') {
+        if (ch != '"' && ch != '\'') {
             throw new JSONException("not support unquoted name");
         }
+        char quote = ch;
 
         int offset = this.offset;
         for (; ; ) {
@@ -5460,7 +5461,7 @@ public final boolean skipName() {
                 continue;
             }
 
-            if (c == '"') {
+            if (c == quote) {
                 offset++;
                 c = bytes[offset];
 
@@ -5523,6 +5524,7 @@ public final void skipValue() {
                 }
                 break;
             }
+            case '\'':
             case '"': {
                 skipString();
                 break;

core/src/test/java/com/alibaba/fastjson2/issues_2000/Issue2059.java

@@ -0,0 +1,30 @@
+package com.alibaba.fastjson2.issues_2000;
+
+import com.alibaba.fastjson2.JSON;
+import org.junit.jupiter.api.Test;
+
+import java.nio.charset.StandardCharsets;
+
+import static org.junit.jupiter.api.Assertions.assertTrue;
+
+public class Issue2059 {
+    @Test
+    public void test() {
+        String str1 = "{'queryParam':{ 'STATUS': '1','MENU_TYPE': '11'}}";
+        assertTrue(
+                JSON.isValid(str1));
+        assertTrue(
+                JSON.isValid(str1.toCharArray()));
+        assertTrue(
+                JSON.isValid(
+                        str1.getBytes(StandardCharsets.UTF_8)));
+        assertTrue(
+                JSON.isValid(
+                        str1.getBytes(StandardCharsets.UTF_8),
+                        StandardCharsets.ISO_8859_1));
+        assertTrue(
+                JSON.isValid(
+                        str1.getBytes(StandardCharsets.UTF_8),
+                        StandardCharsets.US_ASCII));
+    }
+}