tomcat新增跨域訪問功能-Access-Control-Allow-Origin:*
阿新 • • 發佈:2019-01-27
目標:tomcat伺服器提供的介面,不能在其他域中訪問的時候,需要增 Access-Control-Allow-Origin:*
直接配置的方法很多,但是我一個沒有成功過,所以只能自己寫攔截器了。
1. 編寫攔截器程式碼
新建一個類,實現Filter介面,程式碼如下
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package com.itxc.filter;
import javax.servlet.*;
import javax.servlet.http.HttpServletResponse; import java.io.IOException;
public class CORSFilter implements Filter
{
@Override
public void init(FilterConfig
filterConfig) throws ServletException
{
}
@Override
public void doFilter(ServletRequest
servletRequest, ServletResponse servletResponse, FilterChain filterChain) throws IOException,
ServletException { HttpServletResponse
httpResponse = (HttpServletResponse) servletResponse;
httpResponse.addHeader( "Access-Control-Allow-Origin" , "*" );
filterChain.doFilter(servletRequest,
servletResponse);
}
@Override
public void destroy()
{
}
}
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2. 配置web.xml
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< filter >
< filter-name >CorsFilter</ filter-name >
< filter-class >com.itxc.filter.CORSFilter</ filter-class >
</ filter >
< filter-mapping >
< filter-name >CorsFilter</ filter-name >
< url-pattern >/*</ url-pattern >
</ filter-mapping >
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3. 刪除你之前為了這個功能配置的亂起八糟的配置吧