如何使用HttpClient

httpClient使用举例：

HttpClient client = new HttpClient()

String url = ana/workFlowOaInterface.do?action=oaTask

PostMethod postMethod = new PostMethod(url)

//设置参数编码为gbk

post.getParams().setParameter(HttpMethodParams.HTTP_CONTENT_CHARSET,"gbk")

//构造键值对参数

NameValuePair[] data = { new NameValuePair("processInstanceId", "230"), new NameValuePair("approveFlag", "1") }

// 把参数值放入postMethod中

postMethod.setRequestBody(data)

//执行

client.executeMethod(postMethod)

//读取内容

byte[] responseBody = postMethod.getResponseBody()

//处理内容

System.out.println(new String(responseBody))

System.out.println("getStatusLine:"+postMethod.getStatusLine())

System.out.println("~~~"+postMethod.getResponseBodyAsString())

System.out.println("statusCode:"+statusCode)

//打印结果页面

String response = new String(postMethod.getResponseBodyAsString().getBytes("utf-8"))

//打印返回的信息

System.out.println("response:"+response)

//释放连接

postMethod.releaseConnection()

如果传递的是中文参数，有可能会出现乱码，通过设置正确的参数编码来解决。

在被调用的接口方，直接通过request.getParameter的方式获取。

可以把你的这段代码简化一下<pre t="code" l="java">ins = method.getResponseBodyAsStream()

byte[] b = new byte[1024]

int r_len = 0

while ((r_len = ins.read(b)) >0)

{

result.append(new String(b, 0, r_len, method.getResponseCharSet()))

}替换为：

<pre t="code" l="java">byte[] ba = method.getResponseBody()

String str= new String(ba,"UTF-8") //得到指定编码格式的字符串这里的str就是你的返回值。这段代码我使用过，可以解决乱码问题

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