解决Tomcat7中文乱码问题

最近使用ssh框架写一个小项目时，发现使用tomcat7，post和get请求会出现中文乱码的为问题，spring框架下提供了一个CharacterEncodingFilter类来解决post中文乱码的问题

在web.xml里配置过滤器

<filter>
  	<filter-name>characterEncodingFilter</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>characterEncodingFilter</filter-name>
  	<url-pattern>/*</url-pattern>
  </filter-mapping>

---

由于CharacterEncodingFilter类中只提供了对post请求中文乱码的解决方案，所以可以自定义一个类来解决post和get两种请求的中文乱码问题

import javax.servlet.*;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletRequestWrapper;
import java.io.IOException;
import java.io.UnsupportedEncodingException;
import java.util.Map;
import java.util.Map.Entry;


/**
 * 解决tomcat7 post和get请求中文乱码问题
 */
public class MyEncodingFilter implements Filter {

    @Override
    public void init(FilterConfig filterConfig) throws ServletException {
    }

    @Override
    public void doFilter(ServletRequest request, ServletResponse response, FilterChain filterChain) throws IOException, ServletException {
        //1.设置POST请求中文乱码的问题
        request.setCharacterEncoding("utf-8");

        //2.解决GET请求中文乱码的问题
        HttpServletRequest hsr = (HttpServletRequest) request;
        if(hsr.getMethod().equalsIgnoreCase("get")){
            MyRequest myRequest = new MyRequest(hsr);

            //放行请求
            filterChain.doFilter(myRequest,response);
        }else{
            filterChain.doFilter(request,response);
        }

    }

    @Override
    public void destroy() {
    }

    /**
     * 自定义包装类
     */
    private class MyRequest extends HttpServletRequestWrapper {
        private HttpServletRequest request;
        private boolean isEncoding = false; //是否已经utf-8编码

        public MyRequest(HttpServletRequest request) {
            super(request);
            this.request = request;
        }

        @Override
        public String getParameter(String name) {
            return getParameterMap().get(name)[0];
        }

        @Override
        public Map<String, String[]> getParameterMap() {
            Map<String,String[]> map = request.getParameterMap();

            if(isEncoding == true){
                return map;
            }

            //遍历value， 改成utf-8编码
            for(Entry<String,String[]> entry : map.entrySet())
            {
                //取数组值
                String[] values = entry.getValue();

                for (int i = 0; i < values.length; i++) {
                    try {
                        values[i] = new String(values[i].getBytes("ISO-8859-1"),"utf-8");
                    } catch (UnsupportedEncodingException e) {
                        e.printStackTrace();
                    }
                }
            }
            isEncoding = true;
            return map;
        }
    }
}

web.xml配置

<!--配置字符编码的过滤器-->
    <filter>
        <filter-name>encodingFilter</filter-name>
        <filter-class>com.gyf.bos.web.filter.MyEncodingFilter</filter-class>
    </filter>
    <filter-mapping>
        <filter-name>encodingFilter</filter-name>
        <url-pattern>/*</url-pattern>
    </filter-mapping>