最近开始又转向J2EE的开发。很久没用，重新熟悉。
本地环境ubuntu 12.13,mysql5.x,tomcat7.x，struts2.3.15.x，spring3.1.0，hibernate4.1.x
之前一直连线上服务器上测试数据库，没有发现有中文乱码问题。
现在在本地搭建此环境，使用本地数据库，便于调试，但是发现每次对数据库操作，有中文就会出现????乱码。
那现在一步步排除什么原因引起：
<%@ page language="java" contentType="text/html; charset=utf-8" pageEncoding="UTF-8"%>
<Connector port="8080" protocol="HTTP/1.1"
connectionTimeout="20000"
redirectPort="8443"
URIEncoding="utf-8"/>
<filter>
<filter-name>encodingFilter</filter-name>
<filter-class>org.springframework.web.filter.CharacterEncodingFilter</filter-class>
<init-param>
<param-name>encoding</param-name>
<param-value>UTF-8</param-value>
</init-param>
</filter>
<filter-mapping>
<filter-name>encodingFilter</filter-name>
<url-pattern>/*</url-pattern>
</filter-mapping> <!-- A filter that sets character encoding that is used to decode -->
<!-- parameters in a POST request -->
<filter>
<filter-name>setCharacterEncodingFilter</filter-name>
<filter-class>org.apache.catalina.filters.SetCharacterEncodingFilter</filter-class>
<init-param>
<param-name>encoding</param-name>
<param-value>UTF-8</param-value>
</init-param>
<async-supported>true</async-supported>
</filter>
mydata.driverClass=com.mysql.jdbc.Driver #mydata.url=jdbc:mysql://localhost:3306/sdk?useUnicode=true&characterEncoding=UTF-8 mydata.url=jdbc:mysql://localhost:3306/sdk?useUnicode=true&characterEncoding=UTF-8 mydata.username=root wshouyouDB.password=xxxx(我遇到的问题是出现上段代码中)
<!-- 读取jdbc.properties配置文件 -->
<bean
class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer">
<property name="locations">
<value>classpath:database-config.properties</value>
</property>
</bean>
<bean id="dataSource" destroy-method="close"
class="com.mchange.v2.c3p0.ComboPooledDataSource">
<property name="driverClass" value="${mydata.driverClass}" />
<property name="jdbcUrl" value="${mydata.url}" />
<property name="user" value="${mydata.username}" />
<property name="password" value="${mydata.password}" />
CREATE TABLE `gamepad_model` ( `edit_id` varchar(50) NOT NULL, `filedata` text, `gamepad_type` varchar(100) NOT NULL, `pic_url` varchar(255) DEFAULT NULL, `sdk_version` varchar(50) NOT NULL, `update_date` timestamp NOT NULL DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP, PRIMARY KEY (`edit_id`) ) ENGINE=InnoDB DEFAULT CHARSET=utf8需要加上：CHARSET=utf8
insert into gamepad_model(edit_id,filedata,gamepad_type,sdk_version) values('test3_测试','ttt','testtt_你好','1'); 如果没有问题，则排除mysql问题mydata.url=jdbc:mysql://localhost:3306/sdk?useUnicode=true&characterEncoding=UTF-8一般不在xml中，连接数据库需要加上
useUnicode=true&characterEncoding=UTF-8但是如果在xml中，需要转意一下
原文地址：http://blog.csdn.net/richerg85/article/details/41171625
