spring mvc跨域（ajax post json）--filter方案

2022-11-10 19:58:19

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

    public Message login(HttpServletRequest request,HttpServletResponse response) throws BusinessException {

//        CORSUtil.addHeaders(response);

        // 获取请求参数

        JSONObject json = WebUtils.getRequest(request);

        String userName = (String) json.get("userName");

        String password = (String) json.get("password");

//        String userName = request.getParameter("userName");

//        String password = request.getParameter("password");

        UsersLoginInfoVO usersLoginInfo = iLoginService.login(userName, password);

        return response(SUCCESS.getCode(),usersLoginInfo);

    }

import java.io.IOException;

import javax.servlet.Filter;

import javax.servlet.FilterChain;

import javax.servlet.FilterConfig;

import javax.servlet.ServletException;

import javax.servlet.ServletRequest;

import javax.servlet.ServletResponse;

import javax.servlet.http.HttpServletRequest;

import javax.servlet.http.HttpServletResponse;

public class HeadersCORSFilter implements Filter {

    @Override

    public void init(FilterConfig filterConfig) throws ServletException {

        // TODO Auto-generated method stub

    }

    @Override

    public void doFilter(ServletRequest request, ServletResponse response,

                         FilterChain chain) throws IOException, ServletException {

        HttpServletResponse httpResp = (HttpServletResponse) response;

        HttpServletRequest httpServletRequest = (HttpServletRequest) request;

        httpResp.setHeader("Access-Control-Allow-Methods", "GET, POST, PUT, OPTIONS");

        httpResp.setHeader("Access-Control-Allow-Origin", "*");

        httpResp.setHeader("Access-Control-Allow-Credentials","true");

        httpResp.setHeader("Access-Control-Max-Age", "3600");

        if (httpServletRequest.getMethod().equalsIgnoreCase("OPTIONS")) {

            httpResp.setHeader("Access-Control-Allow-Headers", "Content-Type,X-Requested-With,accept,Origin," +

                    "Access-Control-Request-Method,Access-Control-Request-Headers,userID,Authentication");

        }

        chain.doFilter(request, response);

    }

    @Override

    public void destroy() {

        // TODO Auto-generated method stub

    }

}

 <!--&lt;!&ndash;cors过滤器&ndash;&gt;-->

    <filter>

        <filter-name>cors</filter-name>

        <filter-class>com.backstage.filter.HeadersCORSFilter</filter-class>

        <async-supported>true</async-supported>

    </filter>

    <filter-mapping>

        <filter-name>cors</filter-name>

        <url-pattern>/*</url-pattern>

    </filter-mapping>

<!DOCTYPE html>

<html>

<head lang="en">

    <meta charset="UTF-8">

    <title>新闻动态</title>

    <meta content="width=device-width, initial-scale=1.0, maximum-scale=1.0, user-scalable=0" name="viewport">

</head>

<body class="body-blackBg">

</body>

<script src="jquery.min.js"></script>

<script>

    $(document).ready(function () {

        $.ajax({

            type: "POST",

            dataType: "json",

            url: "http://localhost:8081/api/pas/web/user/login.do",

            contentType: "application/json; charset=utf-8",

            data:JSON.stringify({userName:"admin", password:"admin123"}),

            success: function (data) {

                console.log(data);

            },

            error: function (data) {

            }

        });

    })

</script>

</html>

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