Index data from mysql database error font utf8?

Hi ,all
i used plugin _river and connect my mysql database with jdbc,however when i index data from table ,the return of data i get back display wrong with error font.
i try to <charset="utf-8"> on html page but not fix .

curl -XPUT 'localhost:9200/_river/my_jdbc_river/_meta' -d '{
"type" : "jdbc",
"jdbc" : {
"driver" : "com.mysql.jdbc.Driver",
"url" : "jdbc:mysql://localhost:3306/gate",
"user" : "root",
"password" : "root",
"sql" : "select * from news"
},
"index" : {
"index" : "news",
"type" : "news"
}
}'

=>data getback : curl -XGET 'localhost:9200/news/news/_search?pretty&q=*'
With error font : title "Xuất hiện game Tiên Tích tại VN" became:" Xuất hiện game Tiên Tích tại VN"

how i can fix it ?