fix: WriterFilter issue alibaba#471.

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

@@ -383,7 +383,7 @@ public void writeWithFilter(JSONWriter jsonWriter, Object object, Object fieldNa
                 continue;
             }
 
-            boolean nameChanged = filteredName != fieldName;
+            boolean nameChanged = filteredName != null && filteredName != fieldName;
 
             Object filteredValue;
             if (valueFilter != null

extension/src/test/java/com/alibaba/fastjson2/spring/issues/issue471/Issue471.java

@@ -0,0 +1,121 @@
+package com.alibaba.fastjson2.spring.issues.issue471;
+
+import com.alibaba.fastjson2.filter.PropertyFilter;
+import com.alibaba.fastjson2.support.config.FastJsonConfig;
+import com.alibaba.fastjson2.support.spring.http.converter.FastJsonHttpMessageConverter;
+import lombok.Data;
+import org.junit.jupiter.api.BeforeEach;
+import org.junit.jupiter.api.Test;
+import org.junit.jupiter.api.extension.ExtendWith;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.context.annotation.ComponentScan;
+import org.springframework.context.annotation.Configuration;
+import org.springframework.core.Ordered;
+import org.springframework.core.annotation.Order;
+import org.springframework.http.MediaType;
+import org.springframework.http.converter.HttpMessageConverter;
+import org.springframework.test.context.ContextConfiguration;
+import org.springframework.test.context.junit.jupiter.SpringExtension;
+import org.springframework.test.context.web.WebAppConfiguration;
+import org.springframework.test.web.servlet.MockMvc;
+import org.springframework.test.web.servlet.setup.MockMvcBuilders;
+import org.springframework.web.bind.annotation.PostMapping;
+import org.springframework.web.bind.annotation.RequestBody;
+import org.springframework.web.bind.annotation.RequestMapping;
+import org.springframework.web.bind.annotation.RestController;
+import org.springframework.web.context.WebApplicationContext;
+import org.springframework.web.filter.CharacterEncodingFilter;
+import org.springframework.web.servlet.config.annotation.EnableWebMvc;
+import org.springframework.web.servlet.config.annotation.WebMvcConfigurer;
+
+import java.nio.charset.StandardCharsets;
+import java.util.*;
+
+import static org.springframework.test.web.servlet.request.MockMvcRequestBuilders.post;
+import static org.springframework.test.web.servlet.result.MockMvcResultHandlers.print;
+import static org.springframework.test.web.servlet.result.MockMvcResultMatchers.status;
+
+@ExtendWith(SpringExtension.class)
+@WebAppConfiguration
+@ContextConfiguration
+public class Issue471 {
+    @Autowired
+    private WebApplicationContext wac;
+
+    private MockMvc mockMvc;
+
+    @BeforeEach
+    public void setup() {
+        this.mockMvc = MockMvcBuilders.webAppContextSetup(this.wac) //
+                .addFilter(new CharacterEncodingFilter("UTF-8", true)) // 设置服务器端返回的字符集为：UTF-8
+                .build();
+    }
+
+    @Test
+    public void test() throws Exception {
+        mockMvc.perform(
+                (post("/test").characterEncoding("UTF-8")
+                        .contentType(MediaType.APPLICATION_JSON_VALUE)
+                        .content("{\"id\":10000,\"name\":\"name\"}")
+                )).andExpect(status().isOk()).andDo(print());
+    }
+
+    @RestController
+    @RequestMapping
+    public static class BeanController {
+        @PostMapping(path = "/test", consumes = MediaType.APPLICATION_JSON_VALUE, produces = MediaType.APPLICATION_JSON_VALUE)
+        public ResponseData test(@RequestBody RequestData request) {
+            ResponseData<Map<String, List>> response = new ResponseData();
+            Map<String, List> map = new HashMap<>();
+            request.setId(10L + request.getId());
+            request.setName("test" + request.getName());
+            map.put("test", Arrays.asList(request));
+            response.setCode(200);
+            response.setMessage("请求成功");
+            response.setSuccess(true);
+            response.setData(map);
+            return response;
+        }
+    }
+
+    @ComponentScan(basePackages = "com.alibaba.fastjson2.spring.issues.issue471")
+    @Configuration
+    @Order(Ordered.LOWEST_PRECEDENCE + 1)
+    @EnableWebMvc
+    public static class WebMvcConfig
+            implements WebMvcConfigurer {
+        @Override
+        public void configureMessageConverters(List<HttpMessageConverter<?>> converters) {
+            FastJsonConfig config = new FastJsonConfig();
+            config.setDateFormat("yyyy-MM-dd HH:mm:ss");
+            config.setCharset(StandardCharsets.UTF_8);
+            config.setWriterFilters(new CustomizePropertyFilter());
+            FastJsonHttpMessageConverter converter = new FastJsonHttpMessageConverter();
+            converter.setFastJsonConfig(config);
+            converter.setDefaultCharset(StandardCharsets.UTF_8);
+            converter.setSupportedMediaTypes(Collections.singletonList(MediaType.APPLICATION_JSON));
+            converters.add(converter);
+        }
+    }
+
+    static class CustomizePropertyFilter implements PropertyFilter {
+        @Override
+        public boolean apply(Object object, String name, Object value) {
+            return true;
+        }
+    }
+
+    @Data
+    static class RequestData {
+        private Long id;
+        private String name;
+    }
+
+    @Data
+    static class ResponseData<T> {
+        private int code;
+        private String message;
+        private boolean success;
+        private T data;
+    }
+}