调用WebService接口返回字符串

Service service = new Service();
            Call call = (Call) service.createCall();
            call.setTargetEndpointAddress(this.endPoint);
            call.setOperationName(new QName(this.defaultNameSpace,this.interfaceMethodName));
            call.setSOAPActionURI(this.defaultNameSpace + "/"+ this.interfaceMethodName);
            
            if (this.methodParameter.contains(",")) {
                String[] paramter = this.methodParameter.split(",");
                for (int i = 0; i < paramter.length; i++) {
                    // 接口的参数
                    call.addParameter(new QName(this.defaultNameSpace,paramter[i]), Constants.XSD_STRING,javax.xml.rpc.ParameterMode.IN);
                }
            } else {
                // 接口的参数
                call.addParameter(new QName(this.defaultNameSpace,this.methodParameter), Constants.XSD_STRING,javax.xml.rpc.ParameterMode.IN);
            }
            // 设置返回类型
            call.setReturnType(Constants.XSD_STRING);

            Object[] strs = new Object[] { strDate, hour };
            String returnVal = (String) call.invoke(strs);
            // 给方法传递参数，并且调用方法
            System.out.println("returnVal is " + returnVal);