What should I do if Chinese garbled characters appear in tomcat under centos?

[root@iZ25bdzgev8Z ~]# locale　　#查看当前系统的语言环境
[root@iZ25bdzgev8Z ~]# yum -y install kde-l10n-Chinese　　#安装中文语言包, yum源配置在阿里
[root@iZ25bdzgev8Z ~]# yum reinstall glibc-common
[root@iZ25bdzgev8Z ~]# LANG="zh_CN.UTF-8"

<Connector port="9999" protocol="HTTP/1.1"
    connectionTimeout="20000" URIEncoding="UTF-8"  useBodyEncodingForURI=”true”
    redirectPort="8443" />
<Connector port="8009" protocol="AJP/1.3" redirectPort="8443" URIEncoding="UTF-8"   />

jdbc.url=jdbc:mysql://IP地址:3306/ myprojectDB?useUnicode=true&characterEncoding=utf-8&zeroDateTimeBehavior=convertToNull&useOldAliasMetadataBehavior=true

<servlet>
    <servlet-name>login</servlet-name>
    <servlet-class>cn.hncu.servlets.LoginServlet</servlet-class>
    <init-param>
        <param-name>character</param-name>
        <param-value>GBK</param-value>
    </init-param>
</servlet>

mysql> show variables like 'character_set_database';
mysql> alter database 库名 CHARACTER SET utf-8;