init project

nladmin-system/src/main/java/org/nl/config/CustomJsonConfiguration.java

@@ -0,0 +1,44 @@
+/*
+package org.nl.config;
+
+import com.fasterxml.jackson.databind.ObjectMapper;
+import com.fasterxml.jackson.databind.module.SimpleModule;
+import com.fasterxml.jackson.databind.ser.std.ToStringSerializer;
+import org.springframework.context.annotation.Configuration;
+import org.springframework.http.converter.HttpMessageConverter;
+import org.springframework.http.converter.json.MappingJackson2HttpMessageConverter;
+import org.springframework.web.servlet.config.annotation.EnableWebMvc;
+import org.springframework.web.servlet.config.annotation.WebMvcConfigurer;
+
+import java.util.List;
+
+*/
+/**
+ * 处理前端和后端Long类型失去精度问题.
+ * https://blog.51cto.com/u_15127549/3519757
+ *//*
+
+@Configuration
+@EnableWebMvc
+public class CustomJsonConfiguration implements WebMvcConfigurer {
+    @Override
+    public void configureMessageConverters(List<HttpMessageConverter<?>> converters) {
+        MappingJackson2HttpMessageConverter jackson2HttpMessageConverter = new MappingJackson2HttpMessageConverter();
+
+        ObjectMapper objectMapper = new ObjectMapper();
+        */
+/**
+         * 序列换成json时,将所有的long变成string
+         * 因为js中得数字类型不能包含所有的java long值
+         *//*
+
+        SimpleModule simpleModule = new SimpleModule();
+        simpleModule.addSerializer(Long.class, ToStringSerializer.instance);
+        simpleModule.addSerializer(Long.TYPE, ToStringSerializer.instance);
+        objectMapper.registerModule(simpleModule);
+
+        jackson2HttpMessageConverter.setObjectMapper(objectMapper);
+        converters.add(jackson2HttpMessageConverter);
+    }
+}
+*/