在部署tomcat项目时经常会遇到中文乱码问题，解决的方法可参考以下步骤。

1、更改Tomcat安装目录下的conf\server.xml，指定浏览器的编码格式为“utf-8”格式：

　　方法是更改 server.xml 中的

    <Connector port="8080" maxThreads="150" minSpareThreads="25" maxSpareThreads="75"

    enableLookups="false" redirectPort="8443" acceptCount="100"

    connectionTimeout="20000" disableUploadTimeout="true" URIEncoding='utf-8' />

注意设置URIEncoding='utf-8'

2、设置servlet过滤器

方法是在项目的web.xml文件中加入以下filter

  <filter>

    <filter-name>CharacterEncodingFilter</filter-name>

    <filter-class>net.servlet.CharacterEncodingFilter</filter-class>

  </filter>

  <filter-mapping>

    <filter-name>CharacterEncodingFilter</filter-name>

    <url-pattern>/*</url-pattern>

  </filter-mapping>

net.servlet.CharacterEncodingFilter中的代码如下

package net.servlet;

import java.io.IOException;

import javax.servlet.Filter;

import javax.servlet.FilterChain;

import javax.servlet.FilterConfig;

import javax.servlet.ServletException;

import javax.servlet.ServletRequest;

import javax.servlet.ServletResponse;

public class CharacterEncodingFilter  implements Filter  {

	private static String encoding = "utf-8";

    private boolean ignore=true;  

    protected String getEncoding(){

        return this.encoding;

    }   

	@Override

	public void destroy() {

		// TODO Auto-generated method stub

	}

	@Override

	public void doFilter(ServletRequest request, ServletResponse response,

			FilterChain chain) throws IOException, ServletException {

		String pencoding="utf-8";

		if(ignore||null==request.getCharacterEncoding()){

            if(pencoding!=null){

                request.setCharacterEncoding(pencoding);

            }

        }

//      System.out.println("encoding===="+encoding);

        response.setContentType("text/html;charset="+pencoding);

//      do something here

        //当前工作全部完成后，将请求放开给过滤器链的下一filter

        chain.doFilter(request, response);   

	}

	@Override

	public void init(FilterConfig filterConfig) throws ServletException {

		  this.encoding=filterConfig.getInitParameter("encoding");

	        String value=filterConfig.getInitParameter("ignore");

	        if(value==null){

	            this.ignore=true;

	        }else if(value.equalsIgnoreCase("true")){

	            this.ignore=true;

	        }else if(value.equalsIgnoreCase("yes")){

	            this.ignore=true;

	        }else{

	            this.ignore=false;

	        }

	}

}

3、如果以上两个步骤还没有解决乱码问题，那就有可能是数据库本身的问题。应当将数据库的编码方式统一设置为utf-8。此外，还应注意设置数据库连接的编码类型。如果使用mysql数据库，在指定数据库连接url时应指定characterEncoding。

<DataSources>

	    <ds name="MyPrintPhoto">

			<username>root</username>

			<password>123456</password>

			<dburl>jdbc:mysql://localhost:3306/myprintphoto?useUnicode=true&characterEncoding=utf8&useOldAliasMetadataBehavior=true

			</dburl>

			<classname>com.mysql.jdbc.Driver</classname>

		</ds>

</DataSources>