第一种：返回XML

public void XXX(ActionMapping mapping,

ActionForm actionForm, HttpServletRequest request,

HttpServletResponse response) throws Exception {

String limitStr = URLDecoder.decode(request.getParameter("limit"),"utf-8");

String offsetStr = URLDecoder.decode(request.getParameter("offset"),"utf-8");

String projectNo = URLDecoder.decode(request.getParameter("projectNo"),"utf-8");

if("null".equals(projectNo))

projectNo="";

int limit= Integer.parseInt(limitStr);

int offset =Integer.parseInt(offsetStr);

String start=String.valueOf((limit-1)*offset+1);

String end=String.valueOf(limit*offset);

//int start=(limit-1)*offset+1;

//int end=limit*offset;

// HttpClientUtil httpClientUtil = new HttpClientUtil();

//Map createMap = new HashMap();

//createMap.put("method", "GetAdviceData");

//createMap.put("start", start);

//createMap.put("end", end);

//createMap.put("projectNo", "");

//

//String returnJson = httpClientUtil.doPost(adviceDataUrl, createMap,

//"UTF-8");

//responseJson.writeJsonToResponse(returnJson,response);

String endpoint = ”XXX.asmx“;

String targetNamespace = "http://tempuri.org/";

//所调用接口的方法method

String method = "XXX";

// 创建一个服务(service)调用(call)

Service service = new Service();

Call call = (Call) service.createCall();// 通过service创建call对象

// 设置service所在URL

call.setTargetEndpointAddress(new java.net.URL(endpoint));

call.setOperationName(new QName(targetNamespace, method));

//变量最好只是用String类型，其他类型会报错

call.addParameter(new QName(targetNamespace, "projectNo"),

Constants.XSD_STRING,javax.xml.rpc.ParameterMode.IN);

call.addParameter(new QName(targetNamespace, "start"),

Constants.XSD_STRING,javax.xml.rpc.ParameterMode.IN);

call.addParameter(new QName(targetNamespace, "end"),

Constants.XSD_STRING,javax.xml.rpc.ParameterMode.IN);

call.setUseSOAPAction(true);

//call.setReturnType(org.apache.axis.encoding.XMLType.XSD_STRING);// 设置返回类型

call.setReturnType( Constants.XSD_STRING);

call.setEncodingStyle(endpoint);

call.setSOAPActionURI(targetNamespace +method);

String jsonString = (String) call.invoke(new Object[] { projectNo,start,end }); //此处为数组，有几个变量传几个变量

JSONObject obj=JSONObject.fromObject(jsonString);

String obj1=obj.getString("Table");

String cnt="0";

if(obj.has("Table1"))

{

String obj2=obj.getString("Table1");

JSONObject objcnt=JSONObject.fromObject(obj2);

cnt=objcnt.getString("number");

}

String json="{\"rows\":"+obj1+","+"\"total\":"+cnt+"}";

responseJson.writeJsonToResponse(json,response);

}

第二种：返回字符串

public static String sendPost(String url, String param) {

PrintWriter out = null;

BufferedReader in = null;

String result = "";

try {

URL realUrl = new URL(url);

// 打开和URL之间的连接

URLConnection conn = realUrl.openConnection();

// 设置通用的请求属性

conn.setRequestProperty("accept", "*/*");

conn.setRequestProperty("connection", "Keep-Alive");

conn.setRequestProperty("user-agent",

"Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1;SV1)");

// 发送POST请求必须设置如下两行

conn.setDoOutput(true);

conn.setDoInput(true);

// 获取URLConnection对象对应的输出流

// out = new PrintWriter(conn.getOutputStream());

out = new PrintWriter(new OutputStreamWriter(conn.getOutputStream(),"UTF-8"));

// 发送请求参数

out.print(param);

// flush输出流的缓冲

out.flush();

// 定义BufferedReader输入流来读取URL的响应

in = new BufferedReader(

new InputStreamReader(conn.getInputStream(),"UTF-8"));//流的编码格式

String line;

while ((line = in.readLine()) != null) {

result += line;

}

} catch (Exception e) {

System.out.println("发送 POST 请求出现异常！"+e);

e.printStackTrace();

}

//使用finally块来关闭输出流、输入流

finally{

try{

if(out!=null){

out.close();

}

if(in!=null){

in.close();

}

}

catch(IOException ex){

ex.printStackTrace();

}

}

return result;

}

// 调用

Stirng url=xxx.asmx/XXX;

string para="";

sendPost(url,para);