diff --git a/chapter3/spark.py b/chapter3/spark.py
index 4ffc4de..750e795 100644
--- a/chapter3/spark.py
+++ b/chapter3/spark.py
@@ -6,6 +6,7 @@ import pymysql
 import datetime
 import time
 import json
+from snownlp import SnowNLP
 
 def mysql_query(sql):
     db = pymysql.connect("localhost","root","123456789","sparkproject" )
@@ -127,6 +128,28 @@ def collect_from_type(spark):
     mysql_execute("update datas set data = '{}' where `key` = 'from_type'".format( json.dumps(data,ensure_ascii=False) ))
 
 
+def _get_sentiments(df):
+    n = 0
+    for row in df.rdd.collect():
+        s  = SnowNLP(row.content)
+        n += s.sentiments
+    return n/df.count()
+
+def collect_sentiments(spark):
+    """情感分析"""
+    #小米8
+    df1 = spark.sql("select * from jd_comment where id like '7437788%'")
+    #荣耀10
+    df2 = spark.sql("select * from jd_comment where id like '7081550%'")
+
+    xiaomi_s = get_sentiments(df1)
+    huawei_s = get_sentiments(df2)
+
+    data = {"xiaomi_s": xiaomi_s, "huawei_s": huawei_s}
+    mysql_execute("update datas set data = '{}' where `key` = 'sentiments'".format( 
+        json.dumps(data,ensure_ascii=False) )) 
+
+
 if __name__ == "__main__":
     # $example on:spark_hive$
     # warehouse_location points to the default location for managed databases and tables
@@ -150,6 +173,7 @@ if __name__ == "__main__":
             collect_from_type(spark)
             collect_last_month_sells(spark)
             collect_hour_sells(spark)
+            collect_sentiments(spark)
             count = 1
 
         time.sleep(10)