观云台小程序

gic-data-cloud-wxapp/src/main/java/com/gic/cloud/web/utils/BigDecimalConvertUtils.java

+package com.gic.cloud.web.utils;
+
+import com.fasterxml.jackson.databind.DeserializationFeature;
+import com.fasterxml.jackson.databind.ObjectMapper;
+import com.fasterxml.jackson.databind.module.SimpleModule;
+import org.springframework.context.annotation.Bean;
+import org.springframework.http.converter.json.MappingJackson2HttpMessageConverter;
+import org.springframework.stereotype.Component;
+
+import java.math.BigDecimal;
+
+@Component
+public class BigDecimalConvertUtils {
+    @Bean
+    public MappingJackson2HttpMessageConverter jackson2HttpMessageConverter1(){
+        MappingJackson2HttpMessageConverter jackson2HttpMessageConverter = new MappingJackson2HttpMessageConverter();
+
+        ObjectMapper objectMapper = new ObjectMapper();
+        /**
+         * 序列换成json时,BigDecimal
+         * 因为js中得数字类型不能包含所有的java BigDecimal
+         */
+        SimpleModule simpleModule = new SimpleModule();
+        simpleModule.addSerializer(BigDecimal.class, new BigDecimalJsonSeralizer());
+        simpleModule.addSerializer(String.class, new StringJsonSeralizer());
+        //simpleModule.addSerializer(String.class, new StringJsonSeralizer());
+        objectMapper.registerModule(simpleModule);
+        jackson2HttpMessageConverter.setObjectMapper(objectMapper);
+        objectMapper.configure(DeserializationFeature.FAIL_ON_UNKNOWN_PROPERTIES, false);
+
+        return  jackson2HttpMessageConverter;
+    }
+}

gic-data-cloud-wxapp/src/main/java/com/gic/cloud/web/utils/BigDecimalJsonSeralizer.java

+package com.gic.cloud.web.utils;
+
+import com.fasterxml.jackson.core.JsonGenerator;
+import com.fasterxml.jackson.core.JsonProcessingException;
+import com.fasterxml.jackson.databind.JsonSerializer;
+import com.fasterxml.jackson.databind.SerializerProvider;
+
+import java.io.IOException;
+import java.math.BigDecimal;
+
+public class BigDecimalJsonSeralizer extends JsonSerializer<BigDecimal> {
+
+    @Override
+    public void serialize(BigDecimal value, JsonGenerator jsonGenerator, SerializerProvider serializerProvider) throws IOException, JsonProcessingException {
+        if(value != null){
+            BigDecimal result = value.setScale(2, BigDecimal.ROUND_HALF_UP);
+            jsonGenerator.writeString(result.toString());
+        }else {
+            jsonGenerator.writeString("--");
+        }
+    }
+}
+

gic-data-cloud-wxapp/src/main/java/com/gic/cloud/web/utils/StringJsonSeralizer.java

+package com.gic.cloud.web.utils;
+
+import com.fasterxml.jackson.core.JsonGenerator;
+import com.fasterxml.jackson.core.JsonProcessingException;
+import com.fasterxml.jackson.databind.JsonSerializer;
+import com.fasterxml.jackson.databind.SerializerProvider;
+import org.apache.commons.lang3.StringUtils;
+
+import java.io.IOException;
+import java.math.BigDecimal;
+import java.util.regex.Matcher;
+import java.util.regex.Pattern;
+
+public class StringJsonSeralizer extends JsonSerializer<String> {
+
+    @Override
+    public void serialize(String value, JsonGenerator jsonGenerator, SerializerProvider serializerProvider) throws IOException, JsonProcessingException {
+        if(StringUtils.isNotBlank(value)){
+            Pattern pattern = Pattern.compile("\\d+\\.\\d+$|-\\d+\\.\\d+$");
+            Matcher isNum = pattern.matcher(value);
+            if(isNum.matches()){
+                BigDecimal decimal = new BigDecimal(value).setScale(2, BigDecimal.ROUND_HALF_UP);
+                jsonGenerator.writeString(decimal.toString());
+                return;
+            }
+        }
+        jsonGenerator.writeString(value);
+    }
+}
+