[开发工具]java发送post请求(包括依赖包)复制粘贴即用

注意param为json格式的字符串
/**
     * 想weimob发出post请求数据
     * @param url
     * @param param param为json格式的字符串
     * @return
     */
    public static String doPost(String url,String param){
        //创建httpClient对象
        CloseableHttpClient httpClient = HttpClients.createDefault();
        CloseableHttpResponse response = null;
        String result = "";
        try{
            //创建http请求
            HttpPost httpPost = new HttpPost(url);
            httpPost.addHeader("Content-Type", "application/json");
            //创建请求内容
            StringEntity entity = new StringEntity(param);
            httpPost.setEntity(entity);
            response = httpClient.execute(httpPost);
            result = EntityUtils.toString(response.getEntity(),"utf-8");
        }catch (Exception e){
            e.printStackTrace();
        }finally {
            //关闭资源
            if(response != null){
                try {
                    response.close();
                }catch (IOException ioe){
                    ioe.printStackTrace();
                }
            }
            if(httpClient != null){
                try{
                    httpClient.close();
                }catch (IOException ioe){
                    ioe.printStackTrace();
                }
            }
        }
        return result;
    }

需要导入的依赖有：
<dependencies>
        <dependency>
            <groupId>com.alibaba</groupId>
            <artifactId>fastjson</artifactId>
            <version>1.2.47</version>
        </dependency>
        <dependency>
            <groupId>org.apache.httpcomponents</groupId>
            <artifactId>httpclient</artifactId>
            <version>4.5.10</version>
        </dependency>
        <!-- https://mvnrepository.com/artifact/net.java.dev.jna/jna -->
        <dependency>
            <groupId>net.java.dev.jna</groupId>
            <artifactId>jna</artifactId>
            <version>4.4.0</version>
        </dependency>
        <!-- https://mvnrepository.com/artifact/commons-codec/commons-codec -->
        <dependency>
            <groupId>commons-codec</groupId>
            <artifactId>commons-codec</artifactId>
            <version>1.10</version>
        </dependency>
        <dependency>
            <groupId>log4j</groupId>
            <artifactId>log4j</artifactId>
            <version>1.2.17</version>
        </dependency>
        <dependency>
            <groupId>org.apache.hive</groupId>
            <artifactId>hive-exec</artifactId>
            <version>2.1.1</version>
        </dependency>
        <dependency>
            <groupId>org.apache.hive</groupId>
            <artifactId>hive-jdbc</artifactId>
            <version>2.1.1</version>
        </dependency>
</dependencies>