版权声明:不卑不亢,不骄不躁---好男人就是我,我就是曾哥. https://blog.csdn.net/weixin_42884584/article/details/82460800
下面主要说明 Form-Based 的验证方式的演示代码,如果登陆时需要一个验证码的话,那只有自己想办法怎么得到这个码了:
package com.example.demo;
import org.apache.commons.httpclient.Cookie;
import org.apache.commons.httpclient.HttpClient;
import org.apache.commons.httpclient.NameValuePair;
import org.apache.commons.httpclient.cookie.CookiePolicy;
import org.apache.commons.httpclient.methods.GetMethod;
import org.apache.commons.httpclient.methods.PostMethod;
public class HttpClientLogin {
public
static void main(String[] args) {
//登陆 Url
String loginUrl = "http://192.168.1.100:8080/xx/login.do";
//需登陆后访问的 Url
String dataUrl = "http://192.168.1.100:8999/xx/user_info.html?userid=123456";
HttpClient httpClient = new HttpClient();
//模拟登陆,按实际服务器端要求选用 Post 或 Get 请求方式
PostMethod postMethod = new PostMethod(loginUrl);
//设置登陆时要求的信息,一般就用户名和密码,验证码自己处理了
NameValuePair[] data = {
new NameValuePair("username", "aaa"),
new NameValuePair("password", "123456"),
new NameValuePair("code", "anyany")
};
postMethod.setRequestBody(data);
try {
//设置 HttpClient 接收 Cookie,用与浏览器一样的策略
httpClient.getParams().setCookiePolicy(CookiePolicy.BROWSER_COMPATIBILITY);
httpClient.executeMethod(postMethod);
//获得登陆后的 Cookie
Cookie[] cookies = httpClient.getState().getCookies();
String tmpcookies = "";
for (Cookie c : cookies) {
tmpcookies += c.toString() + ";";
}
//进行登陆后的操作
GetMethod getMethod = new GetMethod(dataUrl);
//每次访问需授权的网址时需带上前面的 cookie 作为通行证
getMethod.setRequestHeader("cookie", tmpcookies);
//你还可以通过 PostMethod/GetMethod 设置更多的请求后数据
//例如,referer 从哪里来的,UA 像搜索引擎都会表名自己是谁,无良搜索引擎除外,这个也可以不要
// postMethod.setRequestHeader("Referer", "http://localhost:8080");
// postMethod.setRequestHeader("User-Agent", "aaa Spot");
httpClient.executeMethod(getMethod);
//打印出返回数据,检验一下是否成功
String text = getMethod.getResponseBodyAsString();
System.out.println(text);
} catch (Exception e) {
e.printStackTrace();
}
}
}
要引入jar包
<dependency>
<groupId>commons-httpclient</groupId>
<artifactId>commons-httpclient</artifactId>
<version>3.0.1</version>
</dependency>
参考文章:https://blog.csdn.net/sdbzwangdongdong/article/details/39557501