写完论文了！！！

ruoyi-admin/src/main/java/com/ruoyi/web/controller/EChartsController.java

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+package com.ruoyi.web.controller;
+
+import com.github.abel533.echarts.Option;
+import com.github.abel533.echarts.axis.CategoryAxis;
+import com.github.abel533.echarts.axis.ValueAxis;
+import com.github.abel533.echarts.code.AxisType;
+import com.github.abel533.echarts.series.Bar;
+import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.ResponseBody;
+
+public class EChartsController {
+    /*
+     * 获取柱状图 json数据
+     * */
+    @GetMapping("/getOption")
+    @ResponseBody
+    public Option getOption()
+    {
+        Option option = new Option();
+        option.tooltip().show(true);
+        option.legend().data("销量");
+
+        ValueAxis valueAxis = new ValueAxis();
+        valueAxis.type(AxisType.category);
+        valueAxis.data("1月","2月","3月","4月","5月","6月","7月","8月","9月","10月","11月","12月","13","14");
+        option.xAxis(valueAxis);
+
+        CategoryAxis categoryAxis = new CategoryAxis();
+        categoryAxis.type(AxisType.value);
+        option.yAxis(categoryAxis);
+
+        Bar bar = new Bar();
+        bar.name("女性").data(36.5, 37.9, 37.0, 40.2, 39.6, 36.7, 35.6, 36.2, 36.6, 40.0, 36.4, 38.3, 36.4, 38.3);
+        Bar bar2 = new Bar();
+        bar2.name("男性").data(36.5, 37.9, 36.0, 38.2, 36.6, 37.7, 39.6, 36.2, 36.6, 40.0, 36.9, 37.3, 36.4, 38.3);
+        option.series(bar2);
+
+        return option;
+    }
+}

ruoyi-framework/src/main/java/com/ruoyi/framework/config/JacksonConfig.java

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+package com.ruoyi.framework.config;
+
+import com.fasterxml.jackson.annotation.JsonInclude;
+import com.fasterxml.jackson.core.JsonGenerator;
+import com.fasterxml.jackson.core.JsonProcessingException;
+import com.fasterxml.jackson.databind.JsonSerializer;
+import com.fasterxml.jackson.databind.ObjectMapper;
+import com.fasterxml.jackson.databind.SerializerProvider;
+import org.springframework.boot.autoconfigure.condition.ConditionalOnMissingBean;
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Configuration;
+import org.springframework.context.annotation.Primary;
+import org.springframework.http.converter.json.Jackson2ObjectMapperBuilder;
+
+
+import java.io.IOException;
+
+@Configuration
+public class JacksonConfig {
+    @Bean
+    @Primary
+    @ConditionalOnMissingBean(ObjectMapper.class)
+    public ObjectMapper jacksonObjectMapper(Jackson2ObjectMapperBuilder builder) {
+        ObjectMapper objectMapper = builder.createXmlMapper(false).build();
+
+        // 通过该方法对mapper对象进行设置，所有序列化的对象都将按改规则进行系列化
+        // Include.Include.ALWAYS 默认
+        // Include.NON_DEFAULT 属性为默认值不序列化
+        // Include.NON_EMPTY 属性为 空（""） 或者为 NULL 都不序列化，则返回的json是没有这个字段的。这样对移动端会更省流量
+        // Include.NON_NULL 属性为NULL 不序列化
+        objectMapper.setSerializationInclusion(JsonInclude.Include.NON_EMPTY);
+
+        // 字段保留，将null值转为""
+        objectMapper.getSerializerProvider().setNullValueSerializer(new JsonSerializer<Object>() {
+            @Override
+            public void serialize(Object o, JsonGenerator jsonGenerator, SerializerProvider serializerProvider) throws IOException, JsonProcessingException {
+                jsonGenerator.writeString("");
+            }
+        });
+        return objectMapper;
+    }
+}