LocalDateTime & LocalDate parse support more cases

Author: wenshao

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

@@ -4946,6 +4946,29 @@ public final LocalDate readLocalDate() {
                         }
                     }
                 }
+
+                int nextQuoteOffset = -1;
+                for (int i = offset, end = Math.min(i + 17, this.end); i < end; ++i) {
+                    if (chars[i] == quote) {
+                        nextQuoteOffset = i;
+                    }
+                }
+                if (nextQuoteOffset != -1
+                        && nextQuoteOffset - offset > 10
+                        && chars[nextQuoteOffset - 6] == '-'
+                        && chars[nextQuoteOffset - 3] == '-'
+                ) {
+                    int year = TypeUtils.parseInt(chars, offset, nextQuoteOffset - offset - 6);
+                    int month = TypeUtils.parseInt(chars, nextQuoteOffset - 5, 2);
+                    int dayOfMonth = TypeUtils.parseInt(chars, nextQuoteOffset - 2, 2);
+                    LocalDate localDate = LocalDate.of(year, month, dayOfMonth);
+                    this.offset = nextQuoteOffset + 1;
+                    next();
+                    if (comma = (this.ch == ',')) {
+                        next();
+                    }
+                    return localDate;
+                }
             }
         }
         return super.readLocalDate();

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

@@ -6048,6 +6048,29 @@ public final LocalDate readLocalDate() {
                         }
                     }
                 }
+
+                int nextQuoteOffset = -1;
+                for (int i = offset, end = Math.min(i + 17, this.end); i < end; ++i) {
+                    if (bytes[i] == quote) {
+                        nextQuoteOffset = i;
+                    }
+                }
+                if (nextQuoteOffset != -1
+                        && nextQuoteOffset - offset > 10
+                        && bytes[nextQuoteOffset - 6] == '-'
+                        && bytes[nextQuoteOffset - 3] == '-'
+                ) {
+                    int year = TypeUtils.parseInt(bytes, offset, nextQuoteOffset - offset - 6);
+                    int month = TypeUtils.parseInt(bytes, nextQuoteOffset - 5, 2);
+                    int dayOfMonth = TypeUtils.parseInt(bytes, nextQuoteOffset - 2, 2);
+                    LocalDate localDate = LocalDate.of(year, month, dayOfMonth);
+                    this.offset = nextQuoteOffset + 1;
+                    next();
+                    if (comma = (this.ch == ',')) {
+                        next();
+                    }
+                    return localDate;
+                }
             }
         }
         return super.readLocalDate();

core/src/main/java/com/alibaba/fastjson2/util/DateUtils.java

@@ -5900,6 +5900,16 @@ public static LocalDateTime parseLocalDateTimeX(char[] str, int offset, int len)
             S6 = c26;
             S7 = c27;
             S8 = c28;
+        } else if (str[offset + len - 15] == '-' && str[offset + len - 12] == '-'
+                && (str[offset + len - 9] == ' ' || str[offset + len - 9] == 'T')
+                && str[offset + len - 6] == ':' && str[offset + len - 3] == ':') {
+            int year = TypeUtils.parseInt(str, offset, len - 15);
+            int month = TypeUtils.parseInt(str, offset + len - 14, 2);
+            int dayOfMonth = TypeUtils.parseInt(str, offset + len - 11, 2);
+            int hour = TypeUtils.parseInt(str, offset + len - 8, 2);
+            int minute = TypeUtils.parseInt(str, offset + len - 5, 2);
+            int second = TypeUtils.parseInt(str, offset + len - 2, 2);
+            return LocalDateTime.of(year, month, dayOfMonth, hour, minute, second);
         } else {
             return null;
         }
@@ -6034,6 +6044,16 @@ public static LocalDateTime parseLocalDateTimeX(byte[] str, int offset, int len)
             S6 = c26;
             S7 = c27;
             S8 = c28;
+        } else if (str[offset + len - 15] == '-' && str[offset + len - 12] == '-'
+                && (str[offset + len - 9] == ' ' || str[offset + len - 9] == 'T')
+                && str[offset + len - 6] == ':' && str[offset + len - 3] == ':') {
+            int year = TypeUtils.parseInt(str, offset, len - 15);
+            int month = TypeUtils.parseInt(str, offset + len - 14, 2);
+            int dayOfMonth = TypeUtils.parseInt(str, offset + len - 11, 2);
+            int hour = TypeUtils.parseInt(str, offset + len - 8, 2);
+            int minute = TypeUtils.parseInt(str, offset + len - 5, 2);
+            int second = TypeUtils.parseInt(str, offset + len - 2, 2);
+            return LocalDateTime.of(year, month, dayOfMonth, hour, minute, second);
         } else {
             return null;
         }

core/src/test/java/com/alibaba/fastjson2/issues_2800/Issue2859.java

@@ -0,0 +1,54 @@
+package com.alibaba.fastjson2.issues_2800;
+
+import com.alibaba.fastjson2.JSON;
+import org.junit.jupiter.api.Test;
+
+import java.nio.charset.StandardCharsets;
+import java.time.LocalDate;
+import java.time.LocalDateTime;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+
+public class Issue2859 {
+    @Test
+    public void test() {
+        String str = "{\"time\":\"-999999999-11-12 13:14:15\"}";
+        {
+            Bean bean = JSON.parseObject(str, Bean.class);
+            assertEquals(str, JSON.toJSONString(bean));
+        }
+        {
+            Bean bean = JSON.parseObject(str.getBytes(StandardCharsets.UTF_8), Bean.class);
+            assertEquals(str, JSON.toJSONString(bean));
+        }
+        {
+            Bean bean = JSON.parseObject(str.toCharArray(), Bean.class);
+            assertEquals(str, JSON.toJSONString(bean));
+        }
+    }
+
+    static class Bean {
+        public LocalDateTime time;
+    }
+
+    @Test
+    public void test1() {
+        String str = "{\"date\":\"-999999999-11-12\"}";
+        {
+            Bean1 bean = JSON.parseObject(str, Bean1.class);
+            assertEquals(str, JSON.toJSONString(bean));
+        }
+        {
+            Bean1 bean = JSON.parseObject(str.getBytes(StandardCharsets.UTF_8), Bean1.class);
+            assertEquals(str, JSON.toJSONString(bean));
+        }
+        {
+            Bean1 bean = JSON.parseObject(str.toCharArray(), Bean1.class);
+            assertEquals(str, JSON.toJSONString(bean));
+        }
+    }
+
+    static class Bean1 {
+        public LocalDate date;
+    }
+}