2021-03-11

tomcat跨域配置

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1.web.xml

配置web.xml过滤器

<filter>
	<filter-name>CharsetEncodingFilter</filter-name>
	<filter-class>inteceptor.CharsetEncodingFilter</filter-class>
	<init-param>
		<param-name>encoding</param-name>
		<param-value>UTF-8</param-value>
	</init-param>
</filter>
<filter-mapping>
	<filter-name>CharsetEncodingFilter</filter-name>
	<url-pattern>/*</url-pattern>
</filter-mapping>

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2.inteceptor.CharsetEncodingFilter

根据web.xml中配置对应路径的过滤器类

package inteceptor;

import java.io.IOException;
import java.util.List;

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;

import org.springframework.web.context.WebApplicationContext;

public class CharsetEncodingFilter implements Filter {
	private String encoding = null;

	/*
	 * 注销函数
	 */
	public void destroy() {
		encoding = null;
	}

	/*
	 * 过滤器操作的编码统一处理
	 */
	public void doFilter(ServletRequest req, ServletResponse res,
			FilterChain filterChain) throws IOException, ServletException {
		HttpServletRequest request = (HttpServletRequest) req;
		HttpServletResponse response = (HttpServletResponse) res;
		
		request.setCharacterEncoding(encoding);
		response.setCharacterEncoding(encoding);
		
		//跨域
		response.setHeader("Access-Control-Allow-Credentials", "true");
        response.setHeader("Access-Control-Allow-Headers", "*");
        response.setHeader("Access-Control-Allow-Methods", "POST, GET, OPTIONS, DELETE, PUT");
		response.setHeader("Access-Control-Allow-Origin", request.getHeader("Origin"));
		response.setHeader("Access-Control-Max-Age", "7200");
		
		filterChain.doFilter(request, response);
	}

	/*
	 * 完成过滤器编码的初始化操作
	 */
	public void init(FilterConfig filterConfig) throws ServletException {
		encoding = filterConfig.getInitParameter("encoding");

	}
}

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3.ajax

前端ajax全局配置属性，所有ajax请求都要配置这几个值

$(function(){
	// 设置ajax全局配置
	$.ajaxSetup({
		xhrFields:{
			withCredentials: true
		},
		crossDomain:true
	});
});