背景:通过springboot完成一个web项目时,想像springmvc一样通过controller层实现页面切换。实现方式如下:
//return "dashboard";//这是由模板引擎解析,然后拼串
//return "forward:/dashboard.html";//这是转发
return "redirect:/main.html";//这是重定向
最终浏览器返回的只是字符串本身:redirect:/main.html。而无法实现页面切换。
各种百度,无法解决。最后才发现是因为springboot注解的原因。
springboot控制层默认注解是:@RestController ,而@RestController是@Controller 和 @ResponseBody的合体。 @ResponseBody会将返回值转换为字符串返回,所以得到的结果只能是字符串。
将@RestController 换成@Controller 后,就实现了页面的切换。
package com.zr.gktjweb.controller.login;
import com.zr.gktjweb.common.HttpClientUtil;
import com.zr.gktjweb.common.ResponseBean;
import com.zr.gktjweb.constant.SysCode;
import com.zr.gktjweb.model.SysUser;
import com.zr.gktjweb.util.JSONUtils;
import com.zr.gktjweb.util.UserUtil;
import io.swagger.annotations.Api;
import io.swagger.annotations.ApiImplicitParam;
import io.swagger.annotations.ApiImplicitParams;
import io.swagger.annotations.ApiOperation;
import net.sf.json.JSONObject;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.ResponseBody;
import javax.servlet.http.HttpServletRequest;
import java.util.HashMap;
import java.util.Map;
@Api(tags = "登录")
@Controller
public class LoginController {
@Value("${baseurl}")
private String baseurl;
@Value("${login_url}")
private String loginUrl;
@Value("${logout_url}")
private String logoutUrl;
private static final Logger LOGGER = LoggerFactory.getLogger(LoginController.class);
@ApiOperation(value = "登录", notes = "登录验证")
@ApiImplicitParams({@ApiImplicitParam(name = "username", value = "姓名", required = true, dataType = "String"),
@ApiImplicitParam(name = "password", value = "密码", required = true, dataType = "String")
})
@RequestMapping(value = "/login.do", method = RequestMethod.POST)
@ResponseBody
public ResponseBean login(String username, String password) {
String url = baseurl + loginUrl;
Map<String, String> map = new HashMap<>();
map.put("username", username);
map.put("password", password);
String result = "";
//请求服务失败
try {
result = HttpClientUtil.doPost(url, map);
} catch (Exception e) {
e.printStackTrace();
LOGGER.error("用户登录", e);
return new ResponseBean(SysCode.errCode, "系统异常,请联系管理员", "");
}
JSONObject json = JSONObject.fromObject(result);
//登录验证未通过
if (!json.getString("code").equals(SysCode.successCode + "")) {
ResponseBean responseBean = JSONUtils.jsonToObject(ResponseBean.class, result);
return responseBean;
}
//验证通过,在session中设置token
JSONObject dataJson = (JSONObject) json.get("data");
String userJson = dataJson.getString("user");
SysUser sysUser = JSONUtils.jsonToObject(SysUser.class, userJson);
JSONObject tokenJson = (JSONObject) dataJson.get("token");
String token = tokenJson.getString("token");
UserUtil.setToken(token);
UserUtil.setUserSession(sysUser);
// session.setAttribute("token", token);
// session.setAttribute("user", sysUser);
String url1 = "/index.html";
Map<String, Object> resMap = new HashMap<>();
resMap.put("url", url1);
return new ResponseBean(SysCode.successCode, "登录成功", resMap);
}
/**
* 注销登录
*
* @param request
* @return
*/
@RequestMapping("/loginout.do")
public String loginOut(HttpServletRequest request) {
request.getSession().invalidate();
String url=baseurl+logoutUrl;
HttpClientUtil.doGet(url);
return "redirect:/";
}
}