Jeesite中解决GET请求及POST乱码

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我们在使用jeesite进行开发的时候，在CMS中的评论管理中后发现乱码问题，这个乱码是由于GET请求传递中文造成的，我们的解决方案是自定义编码过滤器解决。

相应的代码如下：

package com.thinkgem.jeesite.common.filter;

import java.io.IOException;
import java.io.UnsupportedEncodingException;
import java.util.Map;

import javax.servlet.Filter;
import javax.servlet.FilterChain;
import javax.servlet.FilterConfig;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletRequestWrapper;

public class GetAndPostEncodingFilter implements Filter {

	@Override
	public void init(FilterConfig filterConfig) throws ServletException {
		// TODO Auto-generated method stub

	}

	@Override
	public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain)
			throws IOException, ServletException {
		//处理请求乱码
		HttpServletRequest httpServletRequest = (HttpServletRequest) request;
		HttpServletRequest myRequest = new MyRequest(httpServletRequest);
		
		//处理响应乱码
		response.setContentType("text/html;charset=utf-8");
		chain.doFilter(myRequest, response);
	}

	@Override
	public void destroy() {
		// TODO Auto-generated method stub

	}

}

//自定义request对象
class MyRequest extends HttpServletRequestWrapper{

  private HttpServletRequest request;
  private boolean hasEncode;

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

  //对需要增强的方法 进行覆盖
  @Override
  @SuppressWarnings("unchecked")
  public Map<String,String[]> getParameterMap() {
      //先获得请求方式
      String method = request.getMethod();
      if(method.equalsIgnoreCase("post")){   //post方式请求
          try {
              request.setCharacterEncoding("utf-8");
              return request.getParameterMap();
          } catch (UnsupportedEncodingException e) {
              e.printStackTrace();
          }
      }else if(method.equalsIgnoreCase("get")){  //get方式请求
		Map<String,String[]> parameterMap = request.getParameterMap();
          if(!hasEncode){
              for(String parameterName:parameterMap.keySet()){
                  String[] values = parameterMap.get(parameterName);
                  if(values!=null){
                      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();
                          }
                      }
                  }
              }
              hasEncode =  true;
          }
          return parameterMap;
      }
      return super.getParameterMap();
  }

  @Override
  public String getParameter(String name) {
      Map<String,String[]> parameterMap = getParameterMap();
      String[] values = parameterMap.get(name);
      if(values==null){
          return null;
      }
      return values[0];
  }

  @Override
  public String[] getParameterValues(String name) {
      Map<String,String[]> parameterMap = getParameterMap();
      String[] values=parameterMap.get(name);
      return values;
  }
}

相应的web.xml配置如下：

	<!-- 自定义编码过滤器解决POST请求与GET请求乱码问题 -->
	<filter>
		<filter-name>getAndPostEncodingFilter</filter-name>
		<filter-class>com.thinkgem.jeesite.common.filter.GetAndPostEncodingFilter</filter-class>
	</filter>
	<filter-mapping>
		<filter-name>getAndPostEncodingFilter</filter-name>
		<url-pattern>/*</url-pattern>
	</filter-mapping>