需要给开始计划去做的bbs来点seo，因此计划添加一个sitemap.xml，网上就找到这样一个简单的示例。

spring sitemap

Sitemap Controller

首先需要这样一个控制器，用来指向sitemap.xml

@Controller
public class SitemapController {

@RequestMapping(value = "/sitemap.xml", method = RequestMethod.GET)
@ResponseBody
public XmlUrlSet main() {
    XmlUrlSet xmlUrlSet = new XmlUrlSet();
    create(xmlUrlSet, "", XmlUrl.Priority.HIGH);
    create(xmlUrlSet, "/posts",XmlUrl.Priority.MEDIUM);
    return xmlUrlSet;
}

private void create(XmlUrlSet xmlUrlSet, String link, XmlUrl.Priority priority) {
    xmlUrlSet.addUrl(new XmlUrl("http://thoughtworksbbs.phodal.com" + link, priority));
}


}

这样我们就可以控制对sitemap.xml的HTTP请求。

XmlUrl

@XmlAccessorType(value = XmlAccessType.NONE)
@XmlRootElement(name = "url")
public class XmlUrl {
    public enum Priority {
        HIGH("1.0"), MEDIUM("0.5");

        private String value;

        Priority(String value) {
            this.value = value;
        }

        public String getValue() {
            return value;
        }
    }

    @XmlElement
    private String loc;

    @XmlElement
    private String lastmod;

    {
        SimpleDateFormat  formatter=new SimpleDateFormat("yyyy-MM-dd");
        lastmod = formatter.format(new Date(System.currentTimeMillis()));
    }

    @XmlElement
    private String changefreq = "daily";

    @XmlElement
    private String priority;

    public XmlUrl() {
    }

    public XmlUrl(String loc, Priority priority) {
        this.loc = loc;
        this.priority = priority.getValue();
    }

    public String getLoc() {
        return loc;
    }

    public String getPriority() {
        return priority;
    }

    public String getChangefreq() {
        return changefreq;
    }

    public String getLastmod() {
        return lastmod;
    }
}

XmlUrlSet

@XmlAccessorType(value = XmlAccessType.NONE)
@XmlRootElement(name = "urlset", namespace = "http://www.sitemaps.org/schemas/sitemap/0.9")
public class XmlUrlSet {

@XmlElements({@XmlElement(name = "url", type = XmlUrl.class)})
private Collection xmlUrls = new ArrayList();

public void addUrl(XmlUrl xmlUrl) {
    xmlUrls.add(xmlUrl);
}

public Collection getXmlUrls() {
    return xmlUrls;
}


}

这样生成的还有点小问题，Google认为有bug，所以还需要一个package-info.java，在stackoverflow上看到的。

@XmlSchema(namespace = "http://www.sitemaps.org/schemas/sitemap/0.9",
        elementFormDefault = QUALIFIED, xmlns = {@XmlNs(prefix = "",
        namespaceURI = "http://www.sitemaps.org/schemas/sitemap/0.9")})
package com.thoughtworks.bbs.web.sitemap;

import static javax.xml.bind.annotation.XmlNsForm.QUALIFIED;
import javax.xml.bind.annotation.XmlNs;
import javax.xml.bind.annotation.XmlSchema;