Java实现RSETful请求的工具类

使用java编写一个简单的实现restful请求的的工具类

1、加入以下pom依赖

<dependencies>
        <dependency>
            <groupId>com.alibaba</groupId>
            <artifactId>fastjson</artifactId>
            <version>1.2.47</version>
        </dependency>

        <dependency>
            <groupId>commons-httpclient</groupId>
            <artifactId>commons-httpclient</artifactId>
            <version>3.1</version>
        </dependency>

        <dependency>
            <groupId>junit</groupId>
            <artifactId>junit</artifactId>
            <version>4.12</version>
            <scope>test</scope>
        </dependency>
</dependencies>

2、工具类代码

import com.alibaba.fastjson.JSONObject;
import org.apache.commons.httpclient.HttpClient;
import org.apache.commons.httpclient.methods.DeleteMethod;
import org.apache.commons.httpclient.methods.GetMethod;
import org.apache.commons.httpclient.methods.PostMethod;

import java.io.IOException;

/**
 * @Author: zxb
 * @Date : 2020/10/13 9:35 下午
 */
public class HttpClientUtil {

    @SuppressWarnings("deprecation")
    /**
     * 模拟post请求
     */
    public static String postRest(String url, JSONObject json) throws IOException {
        HttpClient httpClient = new HttpClient();
        //创建一个post请求
        PostMethod postMethod = new PostMethod(url);
        //设置传送消息的格式
        // 设置为JSON格式调用
        postMethod.setRequestHeader("Content-Type", "application/json;charset=UTF-8");
        postMethod.setRequestBody(json.toString());
        int code = httpClient.executeMethod(postMethod);
        System.out.println("消息码为：" + code);
        String result = postMethod.getResponseBodyAsString();
        postMethod.releaseConnection();
        return result;
    }

    /**
     * 模拟get请求
     *
     * @param url
     * @return
     * @throws IOException
     */
    public static String getRest(String url) throws IOException {
        HttpClient httpClient = new HttpClient();
        // 创建一个get请求
        GetMethod getMethod = new GetMethod(url);
        getMethod.setRequestHeader("Content-Type", "application/json;charset=UTF-8");
        int code = httpClient.executeMethod(getMethod);
        System.out.println("消息码为：" + code);
        String result = getMethod.getResponseBodyAsString();
        getMethod.releaseConnection();
        return result;
    }

    public static void delRest(String url) throws IOException {
        HttpClient httpClient = new HttpClient();
        DeleteMethod deleteMethod = new DeleteMethod(url);
        deleteMethod.setRequestHeader("Content-Type", "application/json;charset=UTF-8");
        int code = httpClient.executeMethod(deleteMethod);
        System.out.println("消息码为：" + code);
        String result = deleteMethod.getResponseBodyAsString();
        System.out.println("Result:" + result);
        deleteMethod.releaseConnection();
    }
}

3、单元测试

import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.JSONObject;
import org.junit.Test;

import java.io.IOException;

/**
 * @Author: zxb
 * @Date : 2020/10/13 9:54 下午
 */
public class HttpClientUtilTest {

    @Test
    public void testPostRest() throws IOException {
        String url = "http://localhost:8080/jpa/user/";
        JSONObject json = new JSONObject();
        json.put("name", "eric");
        json.put("email", "eric@163.com");
        System.out.println(json);
        String result = HttpClientUtil.postRest(url, json);
        JSONObject jsonObject = JSON.parseObject(result);
        System.out.println(JSON.toJSONString(jsonObject, true));
    }

    @Test
    public void testGetRest() throws IOException {
        String url = "http://localhost:8080/jpa/users";
        String result = HttpClientUtil.getRest(url);
        System.out.println(result);
    }
}

测试运行截图：

数据库表内容：

请求的服务api url