HttpClient v4.5 简单抓取主页数据
2015-08-20 15:10
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由于工作原因，需要每隔半小时刷新一些网页，并查看上面的数据是否有更新。这件事能否自动化进行呢？查找了下Java相关的资料，蹦出一个关键词：HttpClient。
HttpClient是常用Http客户端库，相关的资料也不少，只是网上找到的资料好多都是不能用于4.5版的HttpClient，还是需要自己摸索。
在eclipse里新建一个maven工程(maven 3)，在pom.xml中做如下设置：
在pom.xml上运行"maven install"命令完成之后，在“Maven Dependencies”下有了四个jar包：
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OK，这样就可以抓到网站主页的数据了。现在的HttpClient对于gzip格式的响应解析做得很好，在内部就解压缩了，不需要使用者做特殊处理。
后续还需要做一个桌面的应用，能够隔几分钟轮询页面，并将所需部分内容是否更新的状态通知给用户的功能。
HttpClient是常用Http客户端库，相关的资料也不少，只是网上找到的资料好多都是不能用于4.5版的HttpClient，还是需要自己摸索。
在eclipse里新建一个maven工程(maven 3)，在pom.xml中做如下设置：
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd"> <modelVersion>4.0.0</modelVersion> <groupId>test</groupId> <artifactId>admin.test.httpclient</artifactId> <version>0.0.1-SNAPSHOT</version> <dependencies> <dependency> <groupId>org.apache.httpcomponents</groupId> <artifactId>httpclient</artifactId> <version>4.5</version> </dependency> </dependencies> <build> <finalName>MvnTest</finalName> <plugins> <plugin> <artifactId>maven-compiler-plugin</artifactId> <version>2.0.2</version> <configuration> <source>1.5</source> <target>1.5</target> </configuration> </plugin> </plugins> </build> </project>
在pom.xml上运行"maven install"命令完成之后，在“Maven Dependencies”下有了四个jar包：
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OK，这样就可以抓到网站主页的数据了。现在的HttpClient对于gzip格式的响应解析做得很好，在内部就解压缩了，不需要使用者做特殊处理。
后续还需要做一个桌面的应用，能够隔几分钟轮询页面，并将所需部分内容是否更新的状态通知给用户的功能。
内容来自用户分享和网络整理，不保证内容的准确性，如有侵权内容，可联系管理员处理 
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