spring的普通類中獲取session和request對像

　

　　　在使用spring時,經常需要在普通類中獲取session,request等對像.

1.第一鍾方式，針對Spring和Struts2集成的項目:

在有使用struts2時,因為struts2有一個接口使用org.apache.struts2.ServletActionContext即可很方便的取到session對像.
用法:

ServletActionContext.getRequest().getSession();

 

 

例如:

        // 整合了Struts，所有用這種方式獲取session中屬性(親測有效)
        User user = (User) ServletActionContext.getRequest().getSession().getAttribute("userinfo");//獲取session中的user對象進而獲取操作人名字

 

 

 

2.但在單獨使用spring時如何在普通類中獲取session,reuqest(親測有效，注意:與struts整合之后下面方法失效，獲取不到session中的值)

首先要在web.xml增加如下代碼:(網上說需要這一步，我在IDEA中沒有用這一步也成功了)

 <listener>
        <listener-class>org.springframework.web.context.request.RequestContextListener</listener-class>
 </listener>

 

 

 

第一種方式采用自動注入:

接着在普通類中:

    @Autowired//自動注入request
    private HttpServletRequest request;
    @Autowired
    private HttpSession session;

 

 

 

例如我的測試:

package cn.xm.jwxt.controller.system;

import cn.xm.jwxt.bean.system.User;
import cn.xm.jwxt.service.system.UserService;

import com.github.pagehelper.PageHelper;
import com.github.pagehelper.PageInfo;
import org.apache.log4j.Logger;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.ResponseBody;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpSession;
import java.sql.SQLException;
import java.util.List;

@Controller
public class UserAction {
    private Logger logger = Logger.getLogger(UserAction.class);
    @Autowired
    private UserService userService;
    @Autowired//自動注入request
    private HttpServletRequest request;
    @Autowired
    private HttpSession session;

    /**
     * 根據userCode查詢user
     * @param userCode
     * @return
     */
    @RequestMapping("/findUserById.action")
    public @ResponseBody
    User findUserById(String userCode){
        User user = null;
        try {
            user = userService.findUserByUsercode(userCode);
 Object username = session.getAttribute("username"); System.out.println(username.toString());
        } catch (SQLException e) {
            logger.error("根據userCode查詢user出錯",e);
        }
        return user;
    }
/**
     * 測試環境
     * @return
     */
    @RequestMapping("/test.action")
    public @ResponseBody
    String testEnv() {
        //通過自動注入session之后保存一個屬性
        session.setAttribute("username","qlq");
        return "success";
    }
}

 

 

 

第二種方式使用RequestContextHolder獲取:

            //獲取request與session
            HttpServletRequest request = ((ServletRequestAttributes) RequestContextHolder.getRequestAttributes()).getRequest();
            HttpSession session = request.getSession(false);

 

 

例如我的測試:

package cn.xm.jwxt.controller.system;

import cn.xm.jwxt.bean.system.User;
import cn.xm.jwxt.service.system.UserService;

import com.github.pagehelper.PageHelper;
import com.github.pagehelper.PageInfo;
import org.apache.log4j.Logger;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.ResponseBody;
import org.springframework.web.context.request.RequestContextHolder;
import org.springframework.web.context.request.ServletRequestAttributes;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpSession;
import java.sql.SQLException;
import java.util.List;

@Controller
public class UserAction {
    private Logger logger = Logger.getLogger(UserAction.class);
    @Autowired
    private UserService userService;
    /**
     * 根據userCode查詢user
     * @param userCode
     * @return
     */
    @RequestMapping("/findUserById.action")
    public @ResponseBody
    User findUserById(String userCode){
        User user = null;
        try {
            user = userService.findUserByUsercode(userCode);
            //獲取request與session
            HttpServletRequest request = ((ServletRequestAttributes) RequestContextHolder.getRequestAttributes()).getRequest();
            HttpSession session = request.getSession(false);
            Object username = session.getAttribute("username"); System.out.println(username.toString());
        } catch (SQLException e) {
            logger.error("根據userCode查詢user出錯",e);
        }
        return user;
    }/**
     * 測試環境
     * @return
     */
    @RequestMapping("/test.action")
    public @ResponseBody
    String testEnv() {
        //獲取request與session
        HttpServletRequest request = ((ServletRequestAttributes) RequestContextHolder.getRequestAttributes()).getRequest();
        HttpSession session = request.getSession(false);
        session.setAttribute("username","qlq");
        return "success";
    }
}