Linux mysql 中文乱码处理

在项目中,通过tomcat上部署的web服务器,客户端通过http向服务器的mysql插入数据,但插入的中文会变成???这样的内容,原因有很多

1.服务器没有对request和response进行编码处理,这点好解决,可以通过设置字符集来处理

/**
	 * @see HttpServlet#doGet(HttpServletRequest request, HttpServletResponse
	 *      response)
	 */
	protected void doGet(HttpServletRequest request, HttpServletResponse response)
			throws ServletException, IOException {
		request.setCharacterEncoding("UTF-8");
		response.setCharacterEncoding("UTF-8"); 
		//这句话的意思，是让浏览器用utf8来解析返回的数据  
        response.setHeader("Content-type", "text/html;charset=UTF-8");  
		service(request, response);

	}

2.如果这样仍然会有中文乱码,可以尝试在1的基础上添加filter处理

@WebFilter("/CharsetFilter")
public class CharsetFilter implements Filter {

    /**
     * Default constructor. 
     */
    public CharsetFilter() {
      
    }

	/**
	 * @see Filter#destroy()
	 */
	public void destroy() {
	}

	/**
	 * @see Filter#doFilter(ServletRequest, ServletResponse, FilterChain)
	 */
	public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain) throws IOException, ServletException {
		request.setCharacterEncoding("UTF-8");
		response.setCharacterEncoding("UTF-8"); 
		chain.doFilter(request, response);
	}

	/**
	 * @see Filter#init(FilterConfig)
	 */
	public void init(FilterConfig fConfig) throws ServletException {
	
	}

}

3.如果设置了filter仍然解决不了中文乱码,可能就是mysql服务器出现了问题,可以通过查询编码设置来查看是否有问题

这个是设置好的值,如果有中文乱码问题,一些value的值应该是latin或者是其他的编码表

4.彻底的解决这个问题,本人通过xftp软件对linux的文件进行处理,方便.

找到/etc/my.cnf,替换为一下内容

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[mysql]
no-auto-rehash
default-character-set=utf8

[mysqld]
port = 3306
datadir=/var/lib/mysql
socket=/var/lib/mysql/mysql.sock

# Disabling symbolic-links is recommended to prevent assorted security risks
symbolic-links=0
default-character-set = utf8
character-set-server = utf8
# Settings user and group are ignored when systemd is used (fedora >= 15).
# If you need to run mysqld under a different user or group,
# customize your systemd unit file for mysqld according to the
# instructions in http://fedoraproject.org/wiki/Systemd
user=mysql

# Semisynchronous Replication
# http://dev.mysql.com/doc/refman/5.5/en/replication-semisync.html
# uncomment next line on MASTER
;plugin-load=rpl_semi_sync_master=semisync_master.so
# uncomment next line on SLAVE
;plugin-load=rpl_semi_sync_slave=semisync_slave.so

# Others options for Semisynchronous Replication
;rpl_semi_sync_master_enabled=1
;rpl_semi_sync_master_timeout=10
;rpl_semi_sync_slave_enabled=1

# http://dev.mysql.com/doc/refman/5.5/en/performance-schema.html
;performance_schema


[mysqld_safe]
log-error=/var/log/mysqld.log
pid-file=/var/run/mysqld/mysqld.pid
default-character-set = utf8

[mysql.server]
default-character-set = utf8
[client]
port = 3306
default-character-set = utf8
socket = /var/lib/mysql/mysql.sock

5.重启mysql服务即可

service mysql stop 
service mysql start

或者直接

service mysql restart