Java代码：调用外部接口(使用Json格式传递参数)的方法

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代码如下：

String url="所给外部接口的url";

//创建连接对象

HttpClient httpClient = new HttpClient();

//创建请求

PostMethod method = new PostMethod(url);

//设置请求头格式为json格式

RequestEntity entity=new StringRequestEntity(json,"application/json","UTF-8");

//设置请求体信息

method.setRequestEntity(entity);

//设置请求头信息

method.setRequestHeader("APPKEY", "C6C6E17AC153ED8DF8D61207");

//创建连接

httpClient.executeMethod(method);

//获取返回信息

InputStream in = method.getResponseBodyAsStream();

InputStreamReader isr = new InputStreamReader(in, "UTF-8");

char[] b = new char[4096];

for(int n; (n = isr.read(b)) != -1;) {

sb.append(new String(b, 0, n));

}

String returnStr = sb.toString();