springMVC+mybatis

package demo.spring.mvc.common; import java.io.IOException; import java.io.PrintWriter; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import javax.servlet.jsp.JspException; import javax.servlet.jsp.JspWriter; import javax.servlet.jsp.PageContext; import javax.servlet.jsp.tagext.Tag; import org.springframework.web.context.request.RequestContextHolder; import org.springframework.web.context.request.ServletRequestAttributes; public class ViewIPTag implements Tag{ private PageContext pageContext; @Override public int doEndTag() throws JspException { // HttpServletRequest request = (HttpServletRequest)pageContext.getRequest(); //获取request HttpServletRequest request2 = ((ServletRequestAttributes)RequestContextHolder.getRequestAttributes()).getRequest(); // JspWriter out = pageContext.getOut(); //获取out</span> HttpServletResponse response = ((ServletRequestAttributes)RequestContextHolder.getRequestAttributes()).getResponse(); String ip = request2.getRemoteAddr(); //通过request获取客户机的ip try { PrintWriter out2=response.getWriter(); out2.write("<div style='color:red' position:relation>"+ip+"</div>"); } catch (IOException e1) { // TODO Auto-generated catch block e1.printStackTrace(); } /*try { out.write(ip); //写到浏览器 } catch (IOException e) { throw new RuntimeException(e); } */ return 0; } @Override public int doStartTag() throws JspException { // TODO Auto-generated method stub return 0; } @Override public Tag getParent() { // TODO Auto-generated method stub return null; } @Override public void release() { // TODO Auto-generated method stub } @Override public void setPageContext(PageContext arg0) { // TODO Auto-generated method stub } @Override public void setParent(Tag arg0) { // TODO Auto-generated method stub } }