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Springmvc ajax跨域請(qǐng)求處理方法實(shí)例詳解

更新時(shí)間：2017年10月16日 10:24:51 投稿：mrr

這篇文章主要介紹了Springmvc ajax跨域請(qǐng)求處理方法實(shí)例詳解,需要的朋友可以參考下

上次給一個(gè)網(wǎng)站寫網(wǎng)站前后端分離最后跪在ajax跨域上面了自己在網(wǎng)上找了個(gè)方法親試可用記錄一下

寫一個(gè)類繼承HandlerInterceptorAdapter

package com.util;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.springframework.web.servlet.handler.HandlerInterceptorAdapter;
public class CommonInterceptor extends HandlerInterceptorAdapter {
public boolean preHandle(HttpServletRequest request,
HttpServletResponse response, Object handler) throws Exception {
response.setHeader("Access-Control-Allow-Origin", "*");
response.setHeader("Access-Control-Allow-Methods", "*");
response.setHeader("Access-Control-Max-Age", "3600");
response.setHeader("Access-Control-Allow-Headers",
"Origin, X-Requested-With, Content-Type, Accept");
response.setHeader("Access-Control-Allow-Credentials", "true"); // 是否允許瀏覽器攜帶用戶身份信息（cookie）
return true;
}
}

然后在xml里面配置一下路徑

<mvc:interceptors>
<!--過濾所有請(qǐng)求，處理跨域請(qǐng)求問題 -->
<mvc:interceptor>
<mvc:mapping path="/**" />
<bean class="com.util.CommonInterceptor" />
</mvc:interceptor>
</mvc:interceptors>

　這樣就可以了不過有篇博客說針對(duì)簡(jiǎn)單跨域沒問題。但是針對(duì)post＋json請(qǐng)求卻失敗，提示跨域失敗。所以下面記錄一下他的解決方式

建立一個(gè)類繼承 OncePerRequestFilter

public class CrossFilter extends OncePerRequestFilter {
  @Override
  protected void doFilterInternal(HttpServletRequest request, HttpServletResponse response, FilterChain filterChain) throws ServletException, IOException {
    if (request.getHeader("Access-Control-Request-Method") != null && "OPTIONS".equals(request.getMethod())) {
      // CORS "pre-flight" request
      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");//30 min
    }
    filterChain.doFilter(request, response);
  }
}

web.xml里面設(shè)置一下

<filter>
  <filter-name>cors</filter-name>
  <filter-class>cn.***.filter.CrossFilter</filter-class>
</filter>
<filter-mapping>
  <filter-name>cors</filter-name>
  <url-pattern>/*</url-pattern>
</filter-mapping>

然后就可以了上述方式為spring3.0版本如果是4.0版本可以用下面方式（無測(cè)）

xml里面配置

  <mvc:cors>
    <mvc:mapping path="/**" allowed-origins="*" allow-credentials="true" max-age="1800" allowed-methods="GET,POST,OPTIONS"/>
  </mvc:cors>

PS：使用SpringMVC解決Ajax跨域問題

package com.mengyao.system.filter;
 import java.io.IOException;
import javax.servlet.FilterChain;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.stereotype.Component;
import org.springframework.web.filter.OncePerRequestFilter;
/**
 * CORSFilter 解決跨域問題
 * @author mengyao
 *
 */
@Component
public class InitCORSFilter extends OncePerRequestFilter {
  private Logger logger = LoggerFactory.getLogger(InitCORSFilter.class);
  public InitCORSFilter() {
    logger.info("==== 初始化系統(tǒng)允許跨域請(qǐng)求 ====");
  }
  /**
   * 解決跨域：Access-Control-Allow-Origin，值為*表示服務(wù)器端允許任意Domain訪問請(qǐng)求
   */
  @Override
  protected void doFilterInternal(HttpServletRequest request, HttpServletResponse response, FilterChain filterChain)
      throws ServletException, IOException {
    if (request.getHeader("Access-Control-Request-Method") != null && "OPTIONS".equals(request.getMethod())) {
      response.addHeader("Access-Control-Allow-Origin", "*");
      response.addHeader("Access-Control-Allow-Methods", "GET, POST, PUT, DELETE, OPTIONS");
      response.addHeader("Access-Control-Allow-Headers", "origin, content-type, accept, x-requested-with, sid, mycustom, smuser");
      response.addHeader("Access-Control-Max-Age", "1800");//30 min
    }
    filterChain.doFilter(request, response);
  }
}

好了，代碼到此結(jié)束！

總結(jié)

以上所述是小編給大家介紹的Springmvc ajax跨域請(qǐng)求處理方法實(shí)例詳解，希望對(duì)大家有所幫助，如果大家有任何疑問請(qǐng)給我留言，小編會(huì)及時(shí)回復(fù)大家的。在此也非常感謝大家對(duì)腳本之家網(wǎng)站的支持！

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