java web应用读取mysql数据，经常不是最新的，求大神解救

应用用的是springmvc+springdata jpa+hibernate jpa
jpa配置如下：

<?xml version="1.0" encoding="UTF-8"?>

xmlns="http://xmlns.jcp.org/xml/ns/persistence" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/persistence http://xmlns.jcp.org/xml/ns/persistence/persistence_2_1.xsd">
<persistence-unit name="xinke">
    <class>com.zuoke.model.core.TCoinHistory</class>
    <class>com.zuoke.model.core.TComment</class>
    <class>com.zuoke.model.core.TIndividuation</class>
    <class>com.zuoke.model.core.TMember</class>
    <class>com.zuoke.model.core.TMessage</class>
    <class>com.zuoke.model.core.TNotice</class>
    <class>com.zuoke.model.core.TSignHistory</class>
    <class>com.zuoke.model.core.TUser</class>
    <class>com.zuoke.model.core.TUserinfo</class>
    <class>com.zuoke.model.core.TDataDictionary</class>
    <class>com.zuoke.model.core.THouseDesc</class>
    <class>com.zuoke.model.core.THelpInfoReply</class>
    <class>com.zuoke.model.core.THelpInfo</class>
    <class>com.zuoke.model.core.TReviceInv</class>
    <class>com.zuoke.model.core.TPhotoFile</class>
    <class>com.zuoke.model.core.TPhotoRelation</class>
    <class>com.zuoke.model.core.TGuestOrder</class>
    <class>com.zuoke.model.core.TOrder</class>
    <class>com.zuoke.model.core.TProduct</class>
    <class>com.zuoke.model.core.TInvitation</class>
    <class>com.zuoke.model.core.THouse</class>
    <class>com.zuoke.model.core.TVipHistory</class>
    <properties>
        <property name="hibernate.connection.driver_class" value="com.mysql.jdbc.Driver" />
        <property name="hibernate.connection.url"
            value="jdbc:mysql://120.25.204.164:3306/xinke?characterEncoding=utf-8" />
        <!-- <property name="hibernate.connection.url" value="jdbc:mysql://localhost:3306/xinke?characterEncoding=utf-8"/> -->
        <property name="hibernate.connection.username" value="" />
        <property name="hibernate.connection.password" value="" />
        <property name="hibernate.dialect" value="org.hibernate.dialect.MySQL5Dialect" />
        <property name="hibernate.show_sql" value="true" />
        <property name="hibernate.format_sql" value="true" />
        <property name="hibernate.use_sql_comments" value="false" />
        <property name="hibernate.hbm2ddl.auto" value="update" />
        <property name="hibernate.cache.provider_class" value="org.hibernate.cache.EhCacheProvider" />
        <!-- <property name="hibernate.cache.use_second_level_cache" value="true" /> 
        <property name="hibernate.cache.use_query_cache" value="true" />-->
        <property name="connection.provider_class"
            value="org.hibernate.connection.C3P0ConnectionProvider" />
        <property name="hibernate.c3p0.acquire_increment" value="4" />
        <property name="hibernate.c3p0.idle_test_period" value="3000" />
        <property name="hibernate.c3p0.max_size" value="100" />
        <property name="hibernate.c3p0.max_statements" value="15" />
        <property name="hibernate.c3p0.min_size" value="5" />
        <property name="hibernate.c3p0.maxIdleTime" value="60"/>
        <property name="hibernate.c3p0.timeout" value="25200" />
        <property name="hibernate.c3p0.preferredTestQuery" value="select 1;" />
    </properties>
</persistence-unit>