使用HESSIAN的困惑

初次使用HESSIAN，采用Spring配置，配置结果成功，但是出现如下问题：对接口中的方法，如果没有参数，调用正常，如果有参数，调用出现一场，提示如下：500: java.io.IOException: Server returned HTTP response code: 500 for URL: http://localhost:8084/pm/service/helloService

无参数方法运行结果：

2008-09-30 19:48:02.437
2008-09-30 19:48:02.437
Tue Sep 30 19:48:02 CST 2008
1234567

代码：

    public static void main(String[] args) throws Exception {
        String url = "http://localhost:8084/pm/service/helloService";
        HessianProxyFactory factory = new HessianProxyFactory();
        IHelloWorld d = (IHelloWorld) factory.create(IHelloWorld.class, url);
        try {
            MessageBean bean = d.getMessageBean();
            System.out.println(bean.getMessage());
            System.out.println(bean.getMessage());
            System.out.println(bean.getTime());
            System.out.println(bean.getCode());
            //MessageBean bean = new MessageBean();
            //bean.setCode(10);
            //bean = d.getMessageBean("hgfgfhfhfhg");
            //System.out.println(bean.getMessage());
            //System.out.println(bean.getMessage());
            //System.out.println(bean.getTime());
            //System.out.println(bean.getCode());            
        } catch (Throwable t) {
            System.out.println(t.getMessage());
        }
    }

public interface IHelloWorld {

    public String getMessage();
    public MessageBean getMessageBean();
    public MessageBean getMessageBean(MessageBean bean);
    public MessageBean getMessageBean(String message);
}

/*
 * To change this template, choose Tools | Templates
 * and open the template in the editor.
 * IHelloWorld接口的实现
 */

package com.ccb.ha.remote.study;

import com.ccb.ha.remote.study.beans.MessageBean;
import java.io.Serializable;
import java.text.SimpleDateFormat;
import java.util.Date;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;

/**
 *
 * @author 应用开发
 */
public class HelloWorld  implements Serializable,IHelloWorld{
    private static final long serialVersionUID = 1L;
    private static SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss.SSS");
    private static Log log = LogFactory.getLog(HelloWorld.class);
    public String getMessage() {
        if(HelloWorld.log.isDebugEnabled()){
            HelloWorld.log.debug("现在进入服务方法：getMessage");
        }
        return HelloWorld.sdf.format(new Date());
    }

    public MessageBean getMessageBean() {
        MessageBean bean = new MessageBean();
        bean.setCode(1234567);
        bean.setMessage(this.getMessage());        
        return bean;
    }

    public MessageBean getMessageBean(MessageBean bean) {
        if(bean == null){
            return this.getMessageBean();   
        }
        bean.setCode(bean.getCode()*2);
        bean.setMessage("");
        bean.setTime(new Date());
        return bean;
    }

    public MessageBean getMessageBean(String message) {
        MessageBean bean = new MessageBean();
        bean.setCode(1234567);
        bean.setMessage(message);        
        return bean;
    }
}

/*
 * To change this template, choose Tools | Templates
 * and open the template in the editor.
 * IHelloWorld接口的实现
 */

package com.ccb.ha.remote.study;

import com.ccb.ha.remote.study.beans.MessageBean;
import java.io.Serializable;
import java.text.SimpleDateFormat;
import java.util.Date;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;

/**
 *
 * @author 应用开发
 */
public class HelloWorld  implements Serializable,IHelloWorld{
    private static final long serialVersionUID = 1L;
    private static SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss.SSS");
    private static Log log = LogFactory.getLog(HelloWorld.class);
    public String getMessage() {
        if(HelloWorld.log.isDebugEnabled()){
            HelloWorld.log.debug("现在进入服务方法：getMessage");
        }
        return HelloWorld.sdf.format(new Date());
    }

    public MessageBean getMessageBean() {
        MessageBean bean = new MessageBean();
        bean.setCode(1234567);
        bean.setMessage(this.getMessage());        
        return bean;
    }

    public MessageBean getMessageBean(MessageBean bean) {
        if(bean == null){
            return this.getMessageBean();   
        }
        bean.setCode(bean.getCode()*2);
        bean.setMessage("");
        bean.setTime(new Date());
        return bean;
    }

    public MessageBean getMessageBean(String message) {
        MessageBean bean = new MessageBean();
        bean.setCode(1234567);
        bean.setMessage(message);        
        return bean;
    }
}

评论

4 楼 junphine 2008-12-15  

应该是故意这么做的，Hessian既然定位为跨语言的rpc，就要考虑为其他不支持函数重载的语言着想，取其最小集。
其实这个往往可以绕过，如用Map或数组做参数。

3 楼 zhu_chen001 2008-10-02  

对了，3。13之前hessian就是不能重载的，后面的版本可以试试，估计可能也不行的，主要是java获取方法的问题，根据名称获取，只能返回第一个符合的

2 楼 fzhq1970 2008-10-02  

检查清楚了，在接口中不能重载方法，hessian系统只查找第一个方法，其他方法不能使用，不知道为什么？请帮忙

1 楼 largelove 2008-10-01  

非常讨厌hibernate，鸡肋！