【Java】批量下载Google字体示例代码

现在我要批量的下载Google字体，字体文件路径是

http://fonts.googleapis.com/css?family=Open+Sans:300,400,600,700,800

/* cyrillic-ext */
@font-face {
  font-family: 'Open Sans';
  font-style: normal;
  font-weight: 300;
  src: local('Open Sans Light'), local('OpenSans-Light'), url(http://fonts.gstatic.com/s/opensans/v13/DXI1ORHCpsQm3Vp6mXoaTa-j2U0lmluP9RWlSytm3ho.woff2) format('woff2');
  unicode-range: U+0460-052F, U+20B4, U+2DE0-2DFF, U+A640-A69F;
}
/* cyrillic */
@font-face {
  font-family: 'Open Sans';
  font-style: normal;
  font-weight: 300;
  src: local('Open Sans Light'), local('OpenSans-Light'), url(http://fonts.gstatic.com/s/opensans/v13/DXI1ORHCpsQm3Vp6mXoaTZX5f-9o1vgP2EXwfjgl7AY.woff2) format('woff2');
  unicode-range: U+0400-045F, U+0490-0491, U+04B0-04B1, U+2116;
}
/* greek-ext */
@font-face {
  font-family: 'Open Sans';
  font-style: normal;
  font-weight: 300;
  src: local('Open Sans Light'), local('OpenSans-Light'), url(http://fonts.gstatic.com/s/opensans/v13/DXI1ORHCpsQm3Vp6mXoaTRWV49_lSm1NYrwo-zkhivY.woff2) format('woff2');
  unicode-range: U+1F00-1FFF;
}

有很多woff2这样的文件，如果我一个一个复制路径下载会很慢，加入我使用程序会省不少力

思路：首先是写一个下载的程序，利用正则匹配字体路径循环下载

第一步：写一个下载程序方法

public static String getContent(String url) {  
    CloseableHttpClient httpClient = null;  
    try {  
        // httpClient = HttpClients.createDefault(); //生成一个httpclient对象, 同下代码  
        httpClient = HttpClientBuilder.create().build();  

        HttpGet httpGet = new HttpGet(url);  

        // 配置请求的超时设置  
        RequestConfig config = RequestConfig.custom().setConnectionRequestTimeout(50).setConnectTimeout(50).build();   
        httpGet.setConfig(config);  

        HttpResponse response = httpClient.execute(httpGet);  
        System.out.println("状态码：" + response.getStatusLine()); // 返回响应状态信息  

         // 获取响应消息实体  
        HttpEntity entity = response.getEntity();  

         // 判断响应实体是否为空  
        if (entity != null) {  
            System.out.println("contentEncoding（内容编码）:" + entity.getContentEncoding());  
            String content = EntityUtils.toString(entity, "UTF-8");
            System.out.println("response content（响应内容）:" + content); 
            return content;
        }  
    } catch (Exception e) {  
        e.printStackTrace();  
    } finally {  
        // 关闭或释放资源  
        try {  
            httpClient.close();  
        } catch (IOException e) {  
            e.printStackTrace();  
        }  
    }
    return "";  
}

第二步：将内容压缩成字符串

利用在线css压缩工具压缩成一行字符串，示例如下 

第三步：正则匹配路径：匹配方式参考我的文章 

java正则表达式匹配小括号内的内容： https://www.youcl.com/info/2636

最后一步，循环下载测试

public static void urlDownloads(){
    String content = "@font-face{font-family:'Open Sans';font-style:normal;font-weight:300;src:local('Open Sans Light'),local('OpenSans-Light'),url(http://fonts.gstatic.com/s/opensans/v13/DXI1ORHCpsQm3Vp6mXoaTa-j2U0lmluP9RWlSytm3ho.woff2) format('woff2');unicode-range:U+0460-052F,U+20B4,U+2DE0-2DFF,U+A640-A69F;}@font-face{font-family:'Open Sans';font-style:normal;font-weight:300;src:local('Open Sans Light'),local('OpenSans-Light'),url(http://fonts.gstatic.com/s/opensans/v13/DXI1ORHCpsQm3Vp6mXoaTZX5f-9o1vgP2EXwfjgl7AY.woff2) format('woff2');unicode-range:U+0400-045F,U+0490-0491,U+04B0-04B1,U+2116;}@font-face{font-family:'Open Sans';font-style:normal;font-weight:300;src:local('Open Sans Light'),local('OpenSans-Light'),url(http://fonts.gstatic.com/s/opensans/v13/DXI1ORHCpsQm3Vp6mXoaTRWV49_lSm1NYrwo-zkhivY.woff2) format('woff2');unicode-range:U+1F00-1FFF;}@font-face{font-family:'Open Sans';font-style:normal;font-weight:300;src:local('Open Sans Light'),local('OpenSans-Light'),url(http://fonts.gstatic.com/s/opensans/v13/DXI1ORHCpsQm3Vp6mXoaTaaRobkAwv3vxw3jMhVENGA.woff2) format('woff2');unicode-range:U+0370-03FF;}@font-face{font-family:'Open Sans';font-style:normal;font-weight:300;src:local('Open Sans Light'),local('OpenSans-Light'),url(http://fonts.gstatic.com/s/opensans/v13/DXI1ORHCpsQm3Vp6mXoaTf8zf_FOSsgRmwsS7Aa9k2w.woff2) format('woff2');unicode-range:U+0102-0103,U+1EA0-1EF9,U+20AB;}@font-face{font-family:'Open Sans';font-style:normal;font-weight:300;src:local('Open Sans Light'),local('OpenSans-Light'),url(http://fonts.gstatic.com/s/opensans/v13/DXI1ORHCpsQm3Vp6mXoaTT0LW-43aMEzIO6XUTLjad8.woff2) format('woff2');unicode-range:U+0100-024F,U+1E00-1EFF,U+20A0-20AB,U+20AD-20CF,U+2C60-2C7F,U+A720-A7FF;}@font-face{font-family:'Open Sans';font-style:normal;font-weight:300;src:local('Open Sans Light'),local('OpenSans-Light'),url(http://fonts.gstatic.com/s/opensans/v13/DXI1ORHCpsQm3Vp6mXoaTegdm0LZdjqr5-oayXSOefg.woff2) format('woff2');unicode-range:U+0000-00FF,U+0131,U+0152-0153,U+02C6,U+02DA,U+02DC,U+2000-206F,U+2074,U+20AC,U+2212,U+2215,U+E0FF,U+EFFD,U+F000;}@font-face{font-family:'Open Sans';font-style:normal;font-weight:400;src:local('Open Sans'),local('OpenSans'),url(http://fonts.gstatic.com/s/opensans/v13/K88pR3goAWT7BTt32Z01mxJtnKITppOI_IvcXXDNrsc.woff2) format('woff2');unicode-range:U+0460-052F,U+20B4,U+2DE0-2DFF,U+A640-A69F;}@font-face{font-family:'Open Sans';font-style:normal;font-weight:400;src:local('Open Sans'),local('OpenSans'),url(http://fonts.gstatic.com/s/opensans/v13/RjgO7rYTmqiVp7vzi-Q5URJtnKITppOI_IvcXXDNrsc.woff2) format('woff2');unicode-range:U+0400-045F,U+0490-0491,U+04B0-04B1,U+2116;}@font-face{font-family:'Open Sans';font-style:normal;font-weight:400;src:local('Open Sans'),local('OpenSans'),url(http://fonts.gstatic.com/s/opensans/v13/LWCjsQkB6EMdfHrEVqA1KRJtnKITppOI_IvcXXDNrsc.woff2) format('woff2');unicode-range:U+1F00-1FFF;}@font-face{font-family:'Open Sans';font-style:normal;font-weight:400;src:local('Open Sans'),local('OpenSans'),url(http://fonts.gstatic.com/s/opensans/v13/xozscpT2726on7jbcb_pAhJtnKITppOI_IvcXXDNrsc.woff2) format('woff2');unicode-range:U+0370-03FF;}@font-face{font-family:'Open Sans';font-style:normal;font-weight:400;src:local('Open Sans'),local('OpenSans'),url(http://fonts.gstatic.com/s/opensans/v13/59ZRklaO5bWGqF5A9baEERJtnKITppOI_IvcXXDNrsc.woff2) format('woff2');unicode-range:U+0102-0103,U+1EA0-1EF9,U+20AB;}@font-face{font-family:'Open Sans';font-style:normal;font-weight:400;src:local('Open Sans'),local('OpenSans'),url(http://fonts.gstatic.com/s/opensans/v13/u-WUoqrET9fUeobQW7jkRRJtnKITppOI_IvcXXDNrsc.woff2) format('woff2');unicode-range:U+0100-024F,U+1E00-1EFF,U+20A0-20AB,U+20AD-20CF,U+2C60-2C7F,U+A720-A7FF;}@font-face{font-family:'Open Sans';font-style:normal;font-weight:400;src:local('Open Sans'),local('OpenSans'),url(http://fonts.gstatic.com/s/opensans/v13/cJZKeOuBrn4kERxqtaUH3VtXRa8TVwTICgirnJhmVJw.woff2) format('woff2');unicode-range:U+0000-00FF,U+0131,U+0152-0153,U+02C6,U+02DA,U+02DC,U+2000-206F,U+2074,U+20AC,U+2212,U+2215,U+E0FF,U+EFFD,U+F000;}@font-face{font-family:'Open Sans';font-style:normal;font-weight:600;src:local('Open Sans Semibold'),local('OpenSans-Semibold'),url(http://fonts.gstatic.com/s/opensans/v13/MTP_ySUJH_bn48VBG8sNSq-j2U0lmluP9RWlSytm3ho.woff2) format('woff2');unicode-range:U+0460-052F,U+20B4,U+2DE0-2DFF,U+A640-A69F;}@font-face{font-family:'Open Sans';font-style:normal;font-weight:600;src:local('Open Sans Semibold'),local('OpenSans-Semibold'),url(http://fonts.gstatic.com/s/opensans/v13/MTP_ySUJH_bn48VBG8sNSpX5f-9o1vgP2EXwfjgl7AY.woff2) format('woff2');unicode-range:U+0400-045F,U+0490-0491,U+04B0-04B1,U+2116;}@font-face{font-family:'Open Sans';font-style:normal;font-weight:600;src:local('Open Sans Semibold'),local('OpenSans-Semibold'),url(http://fonts.gstatic.com/s/opensans/v13/MTP_ySUJH_bn48VBG8sNShWV49_lSm1NYrwo-zkhivY.woff2) format('woff2');unicode-range:U+1F00-1FFF;}@font-face{font-family:'Open Sans';font-style:normal;font-weight:600;src:local('Open Sans Semibold'),local('OpenSans-Semibold'),url(http://fonts.gstatic.com/s/opensans/v13/MTP_ySUJH_bn48VBG8sNSqaRobkAwv3vxw3jMhVENGA.woff2) format('woff2');unicode-range:U+0370-03FF;}@font-face{font-family:'Open Sans';font-style:normal;font-weight:600;src:local('Open Sans Semibold'),local('OpenSans-Semibold'),url(http://fonts.gstatic.com/s/opensans/v13/MTP_ySUJH_bn48VBG8sNSv8zf_FOSsgRmwsS7Aa9k2w.woff2) format('woff2');}";
    // 从内容上截取路径数组
    Pattern pattern = Pattern.compile("(?<=url\\()[^\\)]+"); 
    Matcher matcher = pattern.matcher(content);
    while(matcher.find()){
        String url = matcher.group();
        System.out.println(url);
        // 下载字体
        String filename = url.substring(url.lastIndexOf("/")+1);
        System.out.println("文件名："+filename);
        downloadFile(url, filename);
    }
}

public static void main(String[] args) {
     urlDownloads();
}