SpringMVC通过ModelAndView向JSP页面传值

SpringMVC通过ModelAndView向JSP页面传值

Controller的写法：

@Controller

@RequestMapping("/auth")

public class LoginLogoutController {

private static final Logger logger = LoggerFactory.getLogger(LoginLogoutController.class);

 

@RequestMapping(value = "/login", method = RequestMethod.GET)

public ModelAndView getLoginPage(@RequestParam(value = "error", required = false) boolean error) {

logger.debug("Received request to show login page");

 

String errorValue = null;

if (error == true) {

errorValue = "You have entered an invalid username or password!";

} else {

errorValue = "";

}

Map model = new HashMap();

model.put("error", errorValue);

ModelAndView mav = new ModelAndView("loginpage", model);

return mav;

}

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JSp页面获取ModelAndView传递的值

<%@ page isELIgnored="false"%>

<%@ page language="java" contentType="text/html; charset=UTF-8"

pageEncoding="UTF-8"%>

Login

<%=request.getAttribute("error")%>

${requestScope.error}

Username

Password