spingmvc 解决跨域问题

前后端联调接口时，会报跨域错误 无法访问接口

1.在spingContext.xml文件中添加

xmlns:mvc="http://www.springframework.org/schema/mvc"
http://www.springframework.org/schema/mvc
http://www.springframework.org/schema/mvc/spring-mvc-4.0.xsd

2.com.sense.ivr.controller.LoginHandlerInterceptor为拦截类

<!-- 访问拦截  -->
    <mvc:interceptors>
        <mvc:interceptor>
            <mvc:mapping path="/**"/>
            <bean class="com.sense.ivr.controller.LoginHandlerInterceptor"/>
        </mvc:interceptor>
    </mvc:interceptors>

package com.sense.ivr.controller;


import org.springframework.web.servlet.handler.HandlerInterceptorAdapter;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.io.PrintWriter;

/**
 * 
 * 类名称：LoginHandlerInterceptor.java 类描述：
 */
public class LoginHandlerInterceptor extends HandlerInterceptorAdapter {

	@Override
	public boolean preHandle(HttpServletRequest request,
                             HttpServletResponse response, Object handler) throws Exception {

		response.addHeader("Access-Control-Allow-Origin", "*");
		response.addHeader("Access-Control-Allow-Methods", "GET, POST, PUT, DELETE");
		response.addHeader("Access-Control-Allow-Headers", "Content-Type");
		response.addHeader("Access-Control-Max-Age", "1800");
		return true;
	}

	public void out (HttpServletResponse httpServletResponse, String response){
		try {
			//httpServletResponse.setCharacterEncoding("UTF-8");
			httpServletResponse.setContentType("application/json; charset=utf-8");
			PrintWriter out = httpServletResponse.getWriter();
			out.print(response);
		} catch (IOException e) {
			e.printStackTrace();
		}
	}

}

 

本文地址：https://blog.csdn.net/weixin_42152292/article/details/111985567