160912、工具类：spring+springmvc自定义编码转换

一、自定义的类（注意其中的属性，web.xml中的配置就是根据这个类的）
import org.springframework.web.filter.OncePerRequestFilter;
import javax.servlet.FilterChain;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.io.UnsupportedEncodingException;
import java.util.Iterator;
/**
 * Filter - 编码格式转换
 */
public class EncodingConvertFilter extends OncePerRequestFilter {
    /** 原编码格式：与web.xml文件中对应设置 */
    private String fromEncoding = "ISO-8859-1";
    /** 目标编码格式 ：与web.xml文件中对应设置*/
    private String toEncoding = "UTF-8";
    @SuppressWarnings("unchecked")
    @Override
    protected void doFilterInternal(HttpServletRequest request, HttpServletResponse response, FilterChain filterChain) throws ServletException, IOException {
        if (request.getMethod().equalsIgnoreCase("GET")) {
            for (Iterator<String[]> iterator = request.getParameterMap().values().iterator(); iterator.hasNext();) {
                String[] parames = iterator.next();
                for (int i = 0; i < parames.length; i++) {
                    try {
                        parames[i] = new String(parames[i].getBytes(fromEncoding), toEncoding);
                    } catch (UnsupportedEncodingException e) {
                        e.printStackTrace();
                    }
                }
            }
        }
        filterChain.doFilter(request, response);
    }
    /**
     * 获取原编码格式
     * @return 原编码格式
     */
    public String getFromEncoding() {
        return fromEncoding;
    }
    /**
     * 设置原编码格式
     * @param fromEncoding
     *   原编码格式
     */
    public void setFromEncoding(String fromEncoding) {
        this.fromEncoding = fromEncoding;
    }
    /**
     * 获取目标编码格式
     * @return 目标编码格式
     */
    public String getToEncoding() {
        return toEncoding;
    }
    /**
     * 设置目标编码格式
     * @param toEncoding
     *            目标编码格式
     */
    public void setToEncoding(String toEncoding) {
        this.toEncoding = toEncoding;
    }
}
二、web.xml
<!--springmvc自定的过滤post-->
<filter>
    <filter-name>encodingFilter</filter-name>
    <filter-class>org.springframework.web.filter.CharacterEncodingFilter</filter-class>
    <!-- 其中encoding用来设置编码格式，forceEncoding用来设置是否理会 request.getCharacterEncoding()方法，设置为true则强制覆盖之前的编码格式 -->
    <init-param>
      <param-name>encoding</param-name>
      <param-value>UTF-8</param-value>
    </init-param>
    <init-param>
      <param-name>forceEncoding</param-name>
      <param-value>true</param-value>
    </init-param>
  </filter>
<!--自定义过滤get请求，如果tomcat中server.xml文件中配置了URIEncoding="UTF-8",可以不需要-->
<filter>
    <filter-name>encodingConvertFilter</filter-name>
    <filter-class>home.xxx.filter.EncodingConvertFilter</filter-class>
    <init-param>
      <param-name>fromEncoding</param-name>
      <param-value>ISO-8859-1</param-value>
    </init-param>
    <init-param>
      <param-name>toEncoding</param-name>
      <param-value>UTF-8</param-value>
    </init-param>
  </filter>
<filter-mapping>