需要jar包：
commons-httpclient.jar
commons-codec.jar
commons-logging.jar(或許不需要)
或依賴：

<!-- https://mvnrepository.com/artifact/commons-httpclient/commons-httpclient -->
<dependency>
    <groupId>commons-httpclient</groupId>
    <artifactId>commons-httpclient</artifactId>
 

    <version>3.1</version>
</dependency>

程式碼：

//先建立一個連線物件
HttpClient client = new HttpClient();
//建立請求方法
HttpMethod postMethod = new PostMethod("http://127.0.0.1:8080/Test-WebApp/test");
//請求引數物件
NameValuePair[] params = new NameValuePair[]{new NameValuePair("aaa", "111")};

//把請求引數設定到請求方法裡
postMethod.
 
setQueryString(params);
//執行請求
client.executeMethod(postMethod);

//獲取請求相應
String str = postMethod.getResponseBodyAsString();