SpringMVC跨域配置

刺骨的言语ヽ痛彻心扉 2022-02-18 11:39 521阅读 0赞

> **一：SpringMVC4.x以下，就需要对该请求配置Filter，设置请求头可支持跨域。**

** 1.web.xml配置**

<filter>
    	<filter-name>header</filter-name>
    	<filter-class>com.foriseland.fsoa.pay.filter.HeaderFilter</filter-class>
    </filter>
    <filter-mapping>
    	<filter-name>header</filter-name>
    	<url-pattern>/*</url-pattern>
    </filter-mapping> -->

**3.自定义Filter拦截请求，添加跨域请求支持**

package com.foriseland.fsoa.pay.filter;
     
    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;
     
    /**
     * 头部过滤器
     * @author 
     */
    public class HeaderFilter implements Filter{
     
    	public void destroy() {
    		
    	}
     
    	public void doFilter(ServletRequest req, ServletResponse res, FilterChain chain)
    			throws IOException, ServletException {
    		HttpServletRequest request = (HttpServletRequest)req;
    		HttpServletResponse response = (HttpServletResponse) res;
    		String originHeader = request.getHeader("Origin");
    		response.setHeader("Access-Control-Allow-Origin", originHeader);
    		response.setHeader("Access-Control-Allow-Methods", "POST, GET, OPTIONS, DELETE");  
    		response.setHeader("Access-Control-Max-Age", "0");  
    		response.setHeader("Access-Control-Allow-Headers", "Origin, No-Cache, X-Requested-With, If-Modified-Since, Pragma, Last-Modified, Cache-Control, Expires, Content-Type, X-E4M-With,userId,token");  
    		response.setHeader("Access-Control-Allow-Credentials", "true");  
    		response.setHeader("XDomainRequestAllowed","1");   
    		response.setHeader("XDomainRequestAllowed","1");   
            chain.doFilter(request, response);  
    	}
     
    	public void init(FilterConfig arg0) throws ServletException {
    		
    	}
    }

> **二、SpringMVC4.x以上，从SpringMVC4.x开始，就增加了支持跨域访问。**

**1、某个方法支持跨域访问：在方法上增加@CrossOrigin注解**

@RequestMapping("/crossDomain2")  
    @ResponseBody  
    @CrossOrigin  
    public String crossDomain2(HttpServletRequest req, HttpServletResponse res, String name){  
        ……  
        ……  
    }

**2、整个Controller都支持跨域访问，在类上面加上注解@CrossOrigin**

@Controller  
    @CrossOrigin  
    public class TestController {  
        ……  
        ……  
    }

**3.自定义规则支持全局跨域访问，在spring-mvc.xml文件中配置映射路径**

<mvc:cors>  
        <mvc:mapping path="/cross/*"/>  
    </mvc:cors>

如果整个项目所有方法都可以访问，则可以这样配置

<mvc:cors>    
        <mvc:mapping path="/**"/>    
    </mvc:cors>  
    
    /**
    其中* 表示匹配到下一层
    
    ** 表示后面不管有多少层，都能匹配。
    **/

上面表示有/cross/路径的请求都支持跨域访问，也可以增加其它的，如下：

<mvc:cors>  
        <mvc:mapping path="/cross/**" allowed-origins="" max-age="2500"/>  
        <mvc:mapping path="/domain/**"/>  
    </mvc:cors>

请求路径有/cross/，方法示例如下：

@RequestMapping("/cross/crossDomain")  
    @ResponseBody  
    public String crossDomain(HttpServletRequest req, HttpServletResponse res, String name){  
        ……  
        ……  
    }