JavaWeb 发送get请求

JavaWeb 发送get请求

CreationTime--2018年6月20日15点27分

Author:Marydon

1.前提

  通过HttpClient来实现

2.具体实现

  客户端如何发送请求?

  所需jar包:

  commons-httpclient-3.0.jar

  commons-codec-1.9.jar

  commons-logging-1.1.1.jar 

  导入

import org.apache.commons.httpclient.HttpClient;
import org.apache.commons.httpclient.HttpStatus;
import org.apache.commons.httpclient.methods.GetMethod;
/**
 * 发送get请求
 * @explain
 *     1.请求体:get传参没有请求体
 *     2.数据格式:直接拼接到url后面,如:url?key1=value1&key2=value2&...
 * @param url 路径及参数
 * @return 服务器返回数据
 */
public static String sendGet(String url) {
    // 用于接收返回的结果
    String resultData = "";
    try {
        HttpClient httpClient = new HttpClient();
        httpClient.getHttpConnectionManager().getParams().setConnectionTimeout(3000); // 设置连接超时
        httpClient.getHttpConnectionManager().getParams().setSoTimeout(180000); // 设置读取数据超时
        httpClient.getParams().setContentCharset("UTF-8");
        GetMethod get = new GetMethod(url);
        int status = httpClient.executeMethod(get);
        // 状态码为:200
        if (status == HttpStatus.SC_OK) {
            resultData = get.getResponseBodyAsString();
        } else {
            throw new RuntimeException("接口连接失败!");
        }
    } catch (Exception e) {
        e.printStackTrace();
        throw new RuntimeException("接口连接失败!");
    }
    return resultData;
}

  服务器端如何接收客户端传递的数据?

  request.getParameter("key")

3.客户端调用测试

public static void main(String[] args) {
    String requestUrl = "http://localhost:8070/test/rz/server/rzxx/at_VaildToken.do?un_value=B022420184794C7C9D5096CC5F3AE7D2";
    // 发送post请求并接收返回结果
    String resultData = sendGet(requestUrl);
    System.out.println(resultData);
}

 

posted @ 2018-06-20 15:36  Marydon  阅读(3621)  评论(0编辑  收藏  举报