通过发送请求的形式执行某些相关操作，
这里用到了两种，包括Get和Post
下面进行说明
Get：
1 @Autowired//根据类型匹配需要配合Qualifier 2 //@Qualifier//名称 3 //@Resource//根据名称自动匹配，区别于@Autowired 4 public GetCaptcha Captcha; 5 6 @GetMapping("Captcha")//等同于下面 7 //@RequestMapping(value = "name",method = RequestMethod.GET) 8 public @ResponseBody String index(HttpServletRequest request){//错误需要另外处理 9 10 //初始化 11 HttpClient httpClient = Captcha.GetHttpClient(); 12 CaptchaData captchaData = new CaptchaData(); 13 captchaData.setHttpClient(httpClient); 14 15 if(httpClient==null){ 16 return "创建对象错误，检查代理是否到期"; 17 } 18 19 CaptchaData imgValue = Captcha.GetCaptcha(captchaData); 20 21 request.getSession().setAttribute("captchaData",imgValue); 22 23 String htmlText = imgValue.getImg()+"<form action="/json" method="POST"> " + 24 "请输入用户名:<br> " + 25 "<input type="text" name="name" value="张三"> " + 26 "<input type="submit" value="提交"> " + 27 "</form> "; 28 return htmlText;//返回视图名称 29 }
初始化HTTPClient信息，包括不限于：Proxy、SSL、访问头信息。。。。等
1 HttpClient httpClient = Captcha.GetHttpClient();
下面是我所用的设置信息
1 //初始化httpClient对象 2 public HttpClient GetHttpClient() { 3 //创建HTTPClient对象， 4 //初始化 5 SslContextFactory sslContextFactory = new SslContextFactory(); 6 sslContextFactory.setTrustAll(true); 7 HttpClient httpClient = new HttpClient(sslContextFactory); 8 httpClient.setConnectTimeout(10000); 9 httpClient.setFollowRedirects(true); 10 httpClient.setUserAgentField(new HttpField("User-Agent", "xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx")); 11 12 ProxyConfiguration proxyConfig = httpClient.getProxyConfiguration(); 13 HttpProxy proxy = new HttpProxy("xx.xx.xx.xx", xxx); 14 proxyConfig.getProxies().add(proxy); 15 try { 16 httpClient.start(); 17 return httpClient; 18 } catch (Exception e) { 19 return null; 20 } 21 22 }
因要写成Server服务的形式，存在多名用户相互访问的情况，需要将某些信息保存在Session种加以区分。
又因需要传递多个参数，且参数类型不一致，故才采用对象的形式传递，设置CaptchaData进行存储和传递参数
获取的验证码以Baes64存储和展示。
Get请求实现
1 CaptchaData imgValue = Captcha.GetCaptcha(captchaData);
获取信息后返回给请求主体。
Post：
Post与Get的区别在于可以获取数据信息。
1 @PostMapping("json") 2 public @ResponseBody String resp(Userdb user,HttpServletRequest request){ 3 4 CaptchaData captchaData = (CaptchaData) request.getSession().getAttribute("captchaData"); 5 HttpClient httpClient = captchaData.getHttpClient(); 6 7 String returnValue = ""; 8 try { 9 returnValue = Captcha.PostData(user,captchaData); 10 }catch (Exception e){ 11 returnValue = "数据传输出现错误，请检查数据信息"; 12 }finally { 13 try{ 14 httpClient.stop(); 15 } 16 catch (Exception e){ 17 returnValue += " HttpClient关闭异常"; 18 } 19 } 20 return returnValue; 21 }
以表单形式传递参数可以在读取时设定相对应的名称来获取，可以对数值进行限定（不为空，在某个值范围之内）
最后贴出自己的pom.xml配置信息
1 <!-- 继承父包 --> 2 <parent> 3 <groupId>org.springframework.boot</groupId> 4 <artifactId>spring-boot-starter-parent</artifactId> 5 <version>1.5.9.RELEASE</version> 6 </parent> 7 8 <dependencies> 9 <!-- spring-boot使用jetty容器配置begin --> 10 <dependency> 11 <groupId>org.springframework.boot</groupId> 12 <artifactId>spring-boot-starter-web</artifactId> 13 <!-- 排除默认的tomcat,引入jetty容器. --> 14 <exclusions> 15 <exclusion> 16 <groupId>org.springframework.boot</groupId> 17 <artifactId>spring-boot-starter-tomcat</artifactId> 18 </exclusion> 19 </exclusions> 20 </dependency> 21 <!-- jetty 容器. --> 22 <dependency> 23 <groupId>org.springframework.boot</groupId> 24 <artifactId>spring-boot-starter-jetty</artifactId> 25 </dependency> 26 <dependency> 27 <groupId>org.springframework.boot</groupId> 28 <artifactId>spring-boot-starter-test</artifactId> 29 <scope>test</scope> 30 </dependency> 31 <!-- spring-boot使用jetty容器配置end --> 32 33 <dependency> 34 <groupId>org.jsoup</groupId> 35 <artifactId>jsoup</artifactId> 36 <version>1.10.3</version> 37 </dependency> 38 39 </dependencies>
这里必须移除默认的Tomcat容器，否则会产生异常错误
。
END