java如何实现postman中用x-www-form-urlencoded参数的请求

PostMethod postMethod = new PostMethod(valueConfig.getImpsAuthUrl()) ;
postMethod.setRequestHeader("Content-Type", "application/x-www-form-urlencoded;charset=utf-8") ;
//参数设置，需要注意的就是里边不能传NULL，要传空字符串
//key  value 形式参数
NameValuePair[] data = {
         new NameValuePair("username","test"),
         new NameValuePair("password","test123")
};
postMethod.setRequestBody(data);
HttpClient httpClient = new HttpClient();
int response = httpClient.executeMethod(postMethod); // 执行POST方法
String result = postMethod.getResponseBodyAsString() ;  //返回结果

if (response == 200 && result != null) {
		//成功后的逻辑
		doSth();
        log.info("获取请求,result={}", result);
}

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

public static void clientDemo() {
        try {
            String requestUrl = "http://hello/demo";
            PostMethod postMethod = new PostMethod(requestUrl);

            String data = "json_json_json_json";
            StringRequestEntity stringRequestEntity = new StringRequestEntity(data, "application/x-www-form-urlencoded", "utf-8");
            postMethod.setRequestEntity(stringRequestEntity);

            org.apache.commons.httpclient.HttpClient httpClient = new org.apache.commons.httpclient.HttpClient();

            //调用接口
            int code = httpClient.executeMethod(postMethod);
            String result = postMethod.getResponseBodyAsString();

            System.out.println("接口状态" + code);
            System.out.println("响应" + result);
        } catch (Exception e) {
            throw new RuntimeException(e.getMessage());
        }
    }

@RequestMapping(value = "/receive", method = RequestMethod.POST)
    @ResponseBody
    public String receiveFare(@RequestBody String str) {
        System.out.println("接到数据:" + str);
        return "ok";
    }