运行时的错误以标记在程序处

package com.wzcx.action;

import java.util.Map;

import javax.servlet.http.HttpServletRequest; \错误

import org.apache.struts2.ServletActionContext;

import com.opensymphony.xwork2.ActionContext;
import com.opensymphony.xwork2.ActionSupport;
import com.wzcx.model.Wzcx;
import com.wzcx.service.WzcxService;

public class WzcxAction extends ActionSupport {

private static final long serialVersionUID = 1L;

private Wzcx wzcx;
private WzcxService wzcxservice;
private WzcxActionParam wzcxparam;

public Wzcx getWzcx() {
    return wzcx;
}
public void setWzcx(Wzcx wzcx) {
    this.wzcx = wzcx;
}

public void setWzcxservice(WzcxService wzcxservice) {
    this.wzcxservice = wzcxservice;
}

@Override
public void validate() {
    super.validate();
}

@SuppressWarnings("unchecked")
public String findByParam() throws Exception {

    int offset = 0;
    int pagesize = 18;
    HttpServletRequest request = ServletActionContext.getRequest();    \\错误
    if (request.getParameter("pager.offset") != null) {
        offset = Integer.parseInt(ServletActionContext.getRequest().getParameter("pager.offset"));
    }

    Map map = (Map) ActionContext.getContext().get("request");
    map.put("list", this.wzcxservice.findWzcxByParam(wzcx.getCh(), offset, pagesize));
    return SUCCESS;
}
public WzcxActionParam getWzcxparam() {
    return wzcxparam;
}
public void setWzcxparam(WzcxActionParam wzcxparam) {
    this.wzcxparam = wzcxparam;
}