codegen support char field

codegen-test/src/test/java/com/alibaba/fastjson2/internal/processor/annotation/BasicTypeTest.java

@@ -8,7 +8,7 @@ import org.junit.jupiter.api.Test;
 import static org.junit.jupiter.api.Assertions.assertEquals;
 
 public class BasicTypeTest {
-//    @Test
+    @Test
     public void test() {
         Bean bean = new Bean();
         bean.f0 = 100;
@@ -31,6 +31,7 @@ public class BasicTypeTest {
         assertEquals(str, str2);
 
         byte[] jsonb = JSONB.toBytes(bean);
+        System.out.println(JSONB.toJSONString(jsonb));
         Bean bean3 = JSONB.parseObject(jsonb, Bean.class);
         assertEquals(str, JSON.toJSONString(bean3));
     }
@@ -48,7 +49,7 @@ public class BasicTypeTest {
         public String f8;
     }
 
-//    @Test
+    @Test
     public void test1() {
         Bean1 bean = new Bean1();
         bean.f0 = 100;

codegen/src/main/java/com/alibaba/fastjson2/internal/processor/JSONCompiledAnnotationProcessor.java

@@ -345,6 +345,7 @@ public class JSONCompiledAnnotationProcessor
             boolean isMethodReference) {
         String type = attributeInfo.type.toString();
         if ("boolean".equals(type)
+                || "char".equals(type)
                 || "byte".equals(type)
                 || "short".equals(type)
                 || "int".equals(type)

codegen/src/test/java/com/alibaba/fastjson2/internal/processor/Bean.java

@@ -1,7 +1,6 @@
 package com.alibaba.fastjson2.internal.processor;
 
 import com.alibaba.fastjson2.PropertyNamingStrategy;
-import com.alibaba.fastjson2.annotation.JSONCompiled;
 import com.alibaba.fastjson2.annotation.JSONField;
 import com.alibaba.fastjson2.annotation.JSONType;
 
@@ -10,7 +9,7 @@ import java.util.List;
 import java.util.Objects;
 
 @JSONType(naming = PropertyNamingStrategy.PascalCase)
-@JSONCompiled
+//@com.alibaba.fastjson2.annotation.JSONCompiled
 public class Bean {
     @JSONField(name = "uid")
     public int id;

core/src/main/java/com/alibaba/fastjson2/writer/ObjectWriterCreator.java

@@ -1036,6 +1036,10 @@ public class ObjectWriterCreator {
         return new FieldWriterDoubleValueFunc(fieldName, 0, 0, null, null, null, null, function);
     }
 
+    public <T> FieldWriter createFieldWriter(String fieldName, ToCharFunction<T> function) {
+        return new FieldWriterCharValFunc(fieldName, 0, 0, null, null, null, null, function);
+    }
+
     public <T> FieldWriter createFieldWriter(String fieldName, Predicate<T> function) {
         return new FieldWriterBoolValFunc(fieldName, 0, 0, null, null, null, null, function);
     }

core/src/main/java/com/alibaba/fastjson2/writer/ObjectWriters.java

@@ -2,6 +2,7 @@ package com.alibaba.fastjson2.writer;
 
 import com.alibaba.fastjson2.codec.FieldInfo;
 import com.alibaba.fastjson2.function.ToByteFunction;
+import com.alibaba.fastjson2.function.ToCharFunction;
 import com.alibaba.fastjson2.function.ToFloatFunction;
 import com.alibaba.fastjson2.function.ToShortFunction;
 import com.alibaba.fastjson2.util.ParameterizedTypeImpl;
@@ -163,6 +164,10 @@ public class ObjectWriters {
         return INSTANCE.createFieldWriter(fieldName, function);
     }
 
+    public static <T> FieldWriter fieldWriter(String fieldName, ToCharFunction<T> function) {
+        return INSTANCE.createFieldWriter(fieldName, function);
+    }
+
     public static <T> FieldWriter fieldWriter(String fieldName, Predicate<T> function) {
         return INSTANCE.createFieldWriter(fieldName, function);
     }