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				@@ -20,6 +20,10 @@ import java.util.List; 
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				 @EnableConfigurationProperties(FastJsonProperties.class) 
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				 public class FastJsonCfg implements WebMvcConfigurer { 
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				+    public FastJsonCfg(){ 
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				+        System.out.println("FastJsonCfg init"); 
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				+    } 
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				+ 
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				     public static SerializerFeature[] serializerFeatures = new SerializerFeature[] { 
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				             // 字符类型字段如果为null,输出为"",而不是null 
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				             SerializerFeature.WriteNullStringAsEmpty, 
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