Java和c#使用hessian通信
一個簡單的例子學(xué)習(xí)hessian服務(wù):服務(wù)端為Java,客戶端為C#。
先要準(zhǔn)備好C#和Java的第三方類庫:http://hessian.caucho.com/
Hssiancharp.dll
hessian-4.0.37.jar
Hessian服務(wù)端(java)
打開eclipse創(chuàng)建一個Dynamic Web Project,將hessian-4.0.37.jar放到lib下,大概如圖所示:
創(chuàng)建一個通信接口IHello:
package hessian.test.server; import java.util.ArrayList; public interface IHello { String sayHello(String msg); void sayHello2(int bean); void print(String msg); HelloBean getData(HelloBean bean); ArrayList<HelloBean> getBeanList(); ComplexData getComplexData(); } |
IHello接口的一個實現(xiàn):HelloImpl.java
package hessian.test.server; import java.util.ArrayList; public class HelloImpl implements IHello{ public String sayHello(String msg){ return "Hello " + msg; } public void sayHello2(int bean){ System.out.println("Hello " + bean); } public void print(String msg){ System.out.println(msg); } public HelloBean getData(HelloBean bean){ HelloBean result = new HelloBean(); result.setName("lu xiaoxun a new name"); result.setAge(26); System.out.print(bean.getName()); return result; } public ArrayList<HelloBean> getBeanList(){ ArrayList<HelloBean> beans = new ArrayList<HelloBean>(); HelloBean b1 = new HelloBean(); b1.setName("lu1"); b1.setAge(26); beans.add(b1); HelloBean b2 = new HelloBean(); b2.setName("lu2"); b2.setAge(27); beans.add(b2); return beans; } public ComplexData getComplexData(){ ComplexData data = new ComplexData(); ArrayList<HelloBean> beans = getBeanList(); data.setData(beans, beans.size()); return data; } } |
定義用來進行數(shù)據(jù)傳輸?shù)念悾瑑蓚€類都必須實現(xiàn)Serializable接口:
HelloBean.java package hessian.test.server; import java.io.Serializable; public class HelloBean implements Serializable { private static final long serialVersionUID = 570423789882653763L; private String name; private int age; public String getName() { return name; } public void setName(String name) { this.name = name; } public int getAge(){ return age; } public void setAge(int age){ this.age = age; } } ComplexData.java package hessian.test.server; import java.io.Serializable; import java.util.ArrayList; import java.util.HashMap; import java.util.Map; public class ComplexData implements Serializable{ private static final long serialVersionUID = 1L; private ArrayList<HelloBean> helloBeans; //private Map<String, HelloBean> helloBeanMap; private int number; public int getNumber(){ return number; } public ArrayList<HelloBean> getHelloBeans(){ return helloBeans; } public void setData(ArrayList<HelloBean> beans, int num){ this.number = num; this.helloBeans = beans; // helloBeanMap = new HashMap<String, HelloBean>(); // for (HelloBean helloBean : beans) { // if(!helloBeanMap.containsKey(helloBean.getName())) // { // helloBeanMap.put(helloBean.getName(), helloBean); // } // } } } web.xml內(nèi)容: <?xml version="1.0" encoding="UTF-8"?> <web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://java.sun.com/xml/ns/javaee" xmlns:web="http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd" id="WebApp_ID" version="3.0"> <display-name>hessian server</display-name> <servlet> <servlet-name>hessian</servlet-name> <servlet-class>com.caucho.hessian.server.HessianServlet</servlet-class> <init-param> <param-name>service-class</param-name> <param-value>hessian.test.server.HelloImpl</param-value> </init-param> </servlet> <servlet-mapping> <servlet-name>hessian</servlet-name> <url-pattern>/hessian</url-pattern> </servlet-mapping> </web-app> |
Hessian客戶端(c#)
定義一個與服務(wù)端對應(yīng)的IHello接口:IHello.cs
public interface IHello
{
String sayHello(String msg);
void sayHello2(int bean);
void print(String msg);
HelloBean getData(HelloBean bean);
HelloBean[] getBeanList();
ComplexData getComplexData();
}
定義與服務(wù)器端一致的的通信數(shù)據(jù)類:
HelloBean.cs using System; using System.Collections.Generic; using System.Linq; using System.Text; namespace hessian.test.server { public class HelloBean { public String Name { set { name = value; } get { return name; } } private String name; //類型和名稱需要和服務(wù)器端一致 public int Age { set { age = value; } get { return age; } } private int age; //類型和名稱需要和服務(wù)器端一致 public override String ToString() { return "Name: "+ name + " Age: " + age; } } } ComplexData.cs: using System; using System.Collections.Generic; using System.Linq; using System.Text; namespace hessian.test.server { public class ComplexData { private HelloBean[] helloBeans; //private Dictionary<String, HelloBean> helloBeanMap; private int number; public int GetNumber() { return number; } public HelloBean[] GetBeans() { return helloBeans; } //public Dictionary<String, HelloBean> GetBeansDic() //{ // return helloBeanMap; //} } } |
在主項目中添加Hessiancsharp.dll引用。
測試代碼:
using System; using System.Collections.Generic; using System.Linq; using System.Text; using hessiancsharp.client; using hessian.test.server; namespace HessianClientTest { class Program { static void Main(string[] args) { string url = @"http://localhost:8080/HessianServerTest/hessian"; CHessianProxyFactory factory = new CHessianProxyFactory(); IHello test = (IHello)factory.Create(typeof(IHello), url); //Test function Console.WriteLine(test.sayHello("lu")); //打印從服務(wù)器端獲取的字符串 test.sayHello2(12); //在服務(wù)器端控制臺打印 "Hello 12" test.print("hessian"); //在服務(wù)器端控制臺打印 "hessian" //Test Object HelloBean bean = new HelloBean(); //bean.setName("lu xiaoxun"); bean.Name = "luxiaoxun"; HelloBean result = test.getData(bean); Console.WriteLine(result.Name); Console.WriteLine(result.Age); Console.WriteLine(result); //Test Object Array HelloBean[] beans = test.getBeanList(); if (beans != null) { foreach (HelloBean data in beans) { Console.WriteLine(data.ToString()); } } //Test complex data ComplexData complexData = test.getComplexData(); if (complexData != null) { Console.WriteLine("Array number: " + complexData.GetNumber()); HelloBean[] comArray = complexData.GetBeans(); if (comArray != null) { foreach (HelloBean data in comArray) { Console.WriteLine(data.ToString()); } } //Dictionary<String, HelloBean> helloBeanMap = complexData.GetBeansDic(); //if (helloBeanMap != null) //{ // foreach (String key in helloBeanMap.Keys) // { // Console.WriteLine(helloBeanMap[key].GetHelloBeanInfo()); // } //} } Console.ReadKey(); } } } |
測試結(jié)果:
注意事項:
1、服務(wù)端和客戶端用于數(shù)據(jù)傳遞的對象的命名空間要一致
IHello接口所在命名空間服務(wù)端和客戶端可以不一致,但是IHello中用到的HelloBean和ComplexData在Java服務(wù)端和C#客戶端中兩個HelloBean類所在的命名空間要一致。
2、類的字段要一致
用于數(shù)據(jù)傳輸?shù)念惖淖侄蚊妥侄晤愋鸵恢拢ㄐ揎楊愋涂梢圆灰恢拢?/div>
3、服務(wù)端的類要序列化
4、盡量使用基本的數(shù)據(jù)類型
從上面的測試可以看出,傳遞基本的類型沒有問題,傳遞普通的類對象沒有問題,傳遞ArrayList的時候也沒有問題(C#客戶端使用Array數(shù)組),但是傳遞HashMap字典的時候會有問題,C#這邊使用Dictionary沒法對應(yīng)一致,可能是由于hash函數(shù)內(nèi)部實現(xiàn)不一致導(dǎo)致的,具體原因不明。
posted on 2014-09-22 09:24 順其自然EVO 閱讀(234) 評論(0) 編輯 收藏 所屬分類: 測試學(xué)習(xí)專欄
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