SSH整合时出现的InvocationTargetException问题及实例讲解

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今天参考师兄的一个项目来做了一下SSH整合的实验，不过师兄用的是注解的方式，由于本人水平有限，还是用配置文件来的，然后一不留神就出现了下面的问题：

先说明一下实验项目的分层：实体Po、接口Dao、接口实现Impl、业务Service、表单封装Dto、Action；如下图：

本来之前实验的时候都是在Action层直接使用Impl的，不过参考了师兄的项目增加了一个Service层，直接在Service层里面使用Dao，额，这个应该对老手来说是理所当然的；不过在本人实验的过程中遇到了一个很纠结的问题：

Debug的时候在Service里面调用到Dao方法时就会跳到了下面这个方法这里：

  1. publicInvocationTargetException(Throwabletarget){
  2. super((Throwable)null);//DisallowinitCause
  3. this.target=target;
  4. }

在网上查了好久，大致了解是配置文件的问题，然后就以配置文件为切入点寻找问题；不过查看了好久，貌似配置文件是没有什么问题的

一开始我是这样配置的：

<bean id="SecHandDaoImpl" class="org.sip.dao.impl.SecHandDaoImpl">
<property name="sessionFactory" ref="sessionFactory" />
</bean>

<bean id="SecHandService" class="org.sip.service.SecHandService">
</bean>

<bean id="SecHandAction" scope="prototype" class="org.sip.action.SecHandAction">
<property name="secHandService" ref="SecHandService" />
</bean>


问题就出现在了红色标识的地方，因为Service里面只有Dao接口，所以在上面红色这里就不知道怎么注入了，所以尝试了好多方式都没有问题，后来找书看了一下里面的例子讲解，终于解决问题：

<bean id="SecHandService" class="org.sip.service.SecHandService">
<property name="secHandDao" ref="SecHandDaoImpl"></property>
</bean>

这里的secHandDao就是Service里面的使用的接口，SecHandDaoImpl 为接口的实现（这个要先装配好），然后问题就解决了

想了一下，还是基础不太扎实，以后得加强一下先，也应该使用注解来开发了，配置文件的话感觉太臃肿了；

下面贴一下完整的代码：（现在一个练习项目，这里的主要功能是将一些信息添加到数据库：这里使用MysqL）

（1）Po和映射文件（这个个人比较懒都是用Hibernate逆向工程来生成的）：

package org.sip.po;


/**
 * SecHand entity. @author MyEclipse Persistence Tools
 */

public class SecHand  implements java.io.Serializable {


    // Fields    

     private Integer sechandId;
     private User user;
     private String sechandName;
     private String sechandContent;
     private String sechandNewsold;
     private String sechandPriceRegion;
     private String  sechandPrice;
     private String sechandPicture;
     private String sechandDate;
     private String sechandType;
     private String sechandAuPhone;
     private String sechandCollege;
     private String sechandCampus;
     private String sechandPersonIdentity;
     private String sechandOthers;


    // Constructors

    /** default constructor */
    public SecHand() {
    }

	/** minimal constructor */
    public SecHand(User user,String sechandName,String sechandContent,String sechandNewsold,String sechandPriceRegion,String sechandPrice,String sechandPicture,String sechandDate,String sechandType,String sechandAuPhone,String sechandCollege,String sechandCampus,String sechandPersonIdentity) {
        this.user = user;
        this.sechandName = sechandName;
        this.sechandContent = sechandContent;
        this.sechandNewsold = sechandNewsold;
        this.sechandPriceRegion = sechandPriceRegion;
        this.sechandPrice = sechandPrice;
        this.sechandPicture = sechandPicture;
        this.sechandDate = sechandDate;
        this.sechandType = sechandType;
        this.sechandAuPhone = sechandAuPhone;
        this.sechandCollege = sechandCollege;
        this.sechandCampus = sechandCampus;
        this.sechandPersonIdentity = sechandPersonIdentity;
    }
    
    /** full constructor */
    public SecHand(User user,String sechandPersonIdentity,String sechandOthers) {
        this.user = user;
        this.sechandName = sechandName;
        this.sechandContent = sechandContent;
        this.sechandNewsold = sechandNewsold;
        this.sechandPriceRegion = sechandPriceRegion;
        this.sechandPrice = sechandPrice;
        this.sechandPicture = sechandPicture;
        this.sechandDate = sechandDate;
        this.sechandType = sechandType;
        this.sechandAuPhone = sechandAuPhone;
        this.sechandCollege = sechandCollege;
        this.sechandCampus = sechandCampus;
        this.sechandPersonIdentity = sechandPersonIdentity;
        this.sechandOthers = sechandOthers;
    }

   
    // Property accessors

    public Integer getSechandId() {
        return this.sechandId;
    }
    
    public void setSechandId(Integer sechandId) {
        this.sechandId = sechandId;
    }

    public User getUser() {
        return this.user;
    }
    
    public void setUser(User user) {
        this.user = user;
    }

    public String getSechandName() {
        return this.sechandName;
    }
    
    public void setSechandName(String sechandName) {
        this.sechandName = sechandName;
    }

    public String getSechandContent() {
        return this.sechandContent;
    }
    
    public void setSechandContent(String sechandContent) {
        this.sechandContent = sechandContent;
    }

    public String getSechandNewsold() {
        return this.sechandNewsold;
    }
    
    public void setSechandNewsold(String sechandNewsold) {
        this.sechandNewsold = sechandNewsold;
    }

    public String getSechandPriceRegion() {
        return this.sechandPriceRegion;
    }
    
    public void setSechandPriceRegion(String sechandPriceRegion) {
        this.sechandPriceRegion = sechandPriceRegion;
    }

    public String getSechandPrice() {
        return this.sechandPrice;
    }
    
    public void setSechandPrice(String sechandPrice) {
        this.sechandPrice = sechandPrice;
    }

    public String getSechandPicture() {
        return this.sechandPicture;
    }
    
    public void setSechandPicture(String sechandPicture) {
        this.sechandPicture = sechandPicture;
    }

    public String getSechandDate() {
        return this.sechandDate;
    }
    
    public void setSechandDate(String sechandDate) {
        this.sechandDate = sechandDate;
    }

    public String getSechandType() {
        return this.sechandType;
    }
    
    public void setSechandType(String sechandType) {
        this.sechandType = sechandType;
    }

    public String getSechandAuPhone() {
        return this.sechandAuPhone;
    }
    
    public void setSechandAuPhone(String sechandAuPhone) {
        this.sechandAuPhone = sechandAuPhone;
    }

    public String getSechandCollege() {
        return this.sechandCollege;
    }
    
    public void setSechandCollege(String sechandCollege) {
        this.sechandCollege = sechandCollege;
    }

    public String getSechandCampus() {
        return this.sechandCampus;
    }
    
    public void setSechandCampus(String sechandCampus) {
        this.sechandCampus = sechandCampus;
    }

    public String getSechandPersonIdentity() {
        return this.sechandPersonIdentity;
    }
    
    public void setSechandPersonIdentity(String sechandPersonIdentity) {
        this.sechandPersonIdentity = sechandPersonIdentity;
    }

    public String getSechandOthers() {
        return this.sechandOthers;
    }
    
    public void setSechandOthers(String sechandOthers) {
        this.sechandOthers = sechandOthers;
    }
   

}


映射文件

<?xml version="1.0" encoding="utf-8"?>
<!DOCTYPE hibernate-mapping PUBLIC "-//Hibernate/Hibernate Mapping DTD 3.0//EN"
"http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd">
<!-- Mapping file autogenerated by MyEclipse Persistence Tools -->
<hibernate-mapping>
	<class name="org.sip.po.SecHand" table="t_sechand" catalog="gxnusip">
		<id name="sechandId" type="java.lang.Integer">
			<column name="sechand_id" />
			<generator class="identity" />
		</id>
		<many-to-one name="user" class="org.sip.po.User" fetch="select">
			<column name="sechand_writter_id" not-null="true" />
		</many-to-one>
		<property name="sechandName" type="java.lang.String">
			<column name="sechand_name" not-null="true" />
		</property>
		<property name="sechandContent" type="java.lang.String">
			<column name="sechand_content" not-null="true" />
		</property>
		<property name="sechandNewsold" type="java.lang.String">
			<column name="sechand_newsold" not-null="true" />
		</property>
		<property name="sechandPriceRegion" type="java.lang.String">
			<column name="sechand_price_region" not-null="true" />
		</property>
		<property name="sechandPrice" type="java.lang.String">
			<column name="sechand_price" not-null="true" />
		</property>
		<property name="sechandPicture" type="java.lang.String">
			<column name="sechand_picture" not-null="false" />
		</property>
		<property name="sechandDate" type="java.lang.String">
			<column name="sechand_date" not-null="true" />
		</property>
		<property name="sechandType" type="java.lang.String">
			<column name="sechand_type" not-null="true" />
		</property>
		<property name="sechandAuPhone" type="java.lang.String">
			<column name="sechand_au_phone" not-null="true" />
		</property>
		<property name="sechandCollege" type="java.lang.String">
			<column name="sechand_college" not-null="true" />
		</property>
		<property name="sechandCampus" type="java.lang.String">
			<column name="sechand_campus" not-null="true" />
		</property>
		<property name="sechandPersonIdentity" type="java.lang.String">
			<column name="sechand_person_identity" not-null="true" />
		</property>
		<property name="sechandOthers" type="java.lang.String">
			<column name="sechand_others" />
		</property>
	</class>
</hibernate-mapping>


（2）Dao

package org.sip.dao;

import org.sip.po.SecHand;public interface SecHandDao {
 public boolean addSecHand(SecHand secHand);
}

（3）DaoImpl

package org.sip.dao.impl;

import java.sql.sqlException;
import java.util.List;

import org.hibernate.HibernateException;
import org.hibernate.Query;
import org.hibernate.Session;
import org.sip.dao.SecHandDao;
import org.sip.po.SecHand;
import org.springframework.orm.hibernate3.HibernateCallback;
import org.springframework.orm.hibernate3.HibernateTemplate;
import org.springframework.orm.hibernate3.support.HibernateDaoSupport;
import org.springframework.stereotype.Component;

public class SecHandDaoImpl extends HibernateDaoSupport implements SecHandDao {

	@Override
	public boolean addSecHand(SecHand secHand) {
		// TODO Auto-generated method stub
		try{
			getHibernateTemplate().save(secHand);
			System.out.println("二手信息添加成功");
			return true;
		}
		catch(RuntimeException re){
			System.out.println("二手信息添加失败"+re.toString());
			return false;
		}
		
	}

	@SuppressWarnings("rawtypes")
	@Override
	public List findSecHand(final String queryString,final int pageNumber,final int pageSize) {
		// TODO Auto-generated method stub
		try{
			return (List) getHibernateTemplate().executeFind(new HibernateCallback(){
				public Object doInHibernate(Session s) throws HibernateException,sqlException{   
					Query query=s.createQuery(queryString);
					query.setFirstResult((pageNumber-1)*pageSize);
					query.setMaxResults(pageSize);
					List list= query.list();
					return list;
				}
			});
		}catch (RuntimeException re){throw re;}
	}

	@SuppressWarnings("rawtypes")
	@Override
	public List findAllSecHand(int pageNumber,int pageSize) {
		// TODO Auto-generated method stub
		String queryString="from SecHand";
		return findSecHand(queryString,pageNumber,pageSize);
	}

}

（4）Service

package org.sip.service;

import java.util.List;

import org.sip.dao.SecHandDao;
import org.sip.po.SecHand;

public class SecHandService {
	
	private SecHandDao secHandDao;
	
	public SecHandDao getSecHandDao() {
		return secHandDao;
	}
	public void setSecHandDao(SecHandDao secHandDao) {
		this.secHandDao = secHandDao;
	}

	public void addSecHand(SecHand secHand){
		System.out.print("Service:"+secHand.getSechandName());
		//boolean bool=secHandDao.addSecHand(secHand);
		secHandDao.addSecHand(secHand);
		//System.out.print("SUCCESS");
	}
	
	public List findAllSecHand(int pageNumber,int pageSize){
		return secHandDao.findAllSecHand(pageNumber,pageSize);
	}

}



（5）DTO

package org.sip.dto;

import org.sip.po.SecHand;

public class SecHandAuthorization {
	

	private String sechandName;
	private String sechandContent;
	private String sechandNewsold;
	private String sechandPriceRegion;
	private String sechandPrice;
	//private String sechandPicture;	
	private String sechandType;
	private String sechandAuPhone;
	private String sechandCollege;
	private String sechandCampus;
	private String sechandPersonIdentity;
	private String sechandOthers;
	
	//private File sechandPicture;
	//第几页
	private int page;
	
	public String getSechandName() {
		return sechandName;
	}
	public void setSechandName(String sechandName) {
		this.sechandName = sechandName;
	}
	public String getSechandContent() {
		return sechandContent;
	}
	public void setSechandContent(String sechandContent) {
		this.sechandContent = sechandContent;
	}
	public String getSechandNewsold() {
		return sechandNewsold;
	}
	public void setSechandNewsold(String sechandNewsold) {
		this.sechandNewsold = sechandNewsold;
	}
	public String getSechandPriceRegion() {
		return sechandPriceRegion;
	}
	public void setSechandPriceRegion(String sechandPriceRegion) {
		this.sechandPriceRegion = sechandPriceRegion;
	}
	public String getSechandPrice() {
		return sechandPrice;
	}
	public void setSechandPrice(String sechandPrice) {
		this.sechandPrice = sechandPrice;
	}
	

	public String getSechandType() {
		return sechandType;
	}
	public void setSechandType(String sechandType) {
		this.sechandType = sechandType;
	}
	public String getSechandAuPhone() {
		return sechandAuPhone;
	}
	public void setSechandAuPhone(String sechandAuPhone) {
		this.sechandAuPhone = sechandAuPhone;
	}
	public String getSechandCollege() {
		return sechandCollege;
	}
	public void setSechandCollege(String sechandCollege) {
		this.sechandCollege = sechandCollege;
	}
	public String getSechandCampus() {
		return sechandCampus;
	}
	public void setSechandCampus(String sechandCampus) {
		this.sechandCampus = sechandCampus;
	}
	public String getSechandPersonIdentity() {
		return sechandPersonIdentity;
	}
	public void setSechandPersonIdentity(String sechandPersonIdentity) {
		this.sechandPersonIdentity = sechandPersonIdentity;
	}
	public String getSechandOthers() {
		return sechandOthers;
	}
	public void setSechandOthers(String sechandOthers) {
		this.sechandOthers = sechandOthers;
	}
	
	
	public void setPage(int page) {
		this.page = page;
	}
	public SecHand getSecHand(){
		
	
		SecHand secHand=new SecHand();
		
		secHand.setSechandName(sechandName);
		secHand.setSechandContent(sechandContent);
		secHand.setSechandPersonIdentity(sechandPersonIdentity);
		secHand.setSechandType(sechandType);
		secHand.setSechandNewsold(sechandNewsold);
		secHand.setSechandPriceRegion(sechandPriceRegion);
		secHand.setSechandPrice(sechandPrice);
		//secHand.setSechandPicture(sechandPicture);
		secHand.setSechandCollege(sechandCollege);
		secHand.setSechandCampus(sechandCampus);
		secHand.setSechandAuPhone(sechandAuPhone);
		if(sechandOthers!=null){
			secHand.setSechandOthers(sechandOthers);
		}
		return secHand;
		
	}
	
	public int getPage(){
		return page;
	}
	
	

}


（5）Action

package org.sip.action;

import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.List;
import java.util.Map;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpSession;

import org.apache.struts2.ServletActionContext;
import org.apache.struts2.interceptor.SessionAware;
import org.sip.dto.SecHandAuthorization;
import org.sip.po.SecHand;
import org.sip.po.User;
import org.sip.service.SecHandService;

import com.opensymphony.xwork2.ModelDriven;

public class SecHandAction implements SessionAware,ModelDriven<SecHandAuthorization> {

	private SecHandAuthorization secHandAuthorization = new SecHandAuthorization();
	private SecHandService secHandService;
	private Map<String,Object> session;
	private String sechand_result = "";

	private File picture;
	private String pictureContentType;// 上传文件的类型
	private String pictureFileName; // 上传文件名
	private String savePath; // 文件保存路径

	public SecHandAuthorization getSecHandAuthorization() {
		return secHandAuthorization;
	}

	public void setSecHandAuthorization(
			SecHandAuthorization secHandAuthorization) {
		this.secHandAuthorization = secHandAuthorization;
	}

	public void setSecHandService(SecHandService secHandService) {
		this.secHandService = secHandService;
	}

	@Override
	public SecHandAuthorization getModel() {
		// TODO Auto-generated method stub
		return secHandAuthorization;
	}

	// addSecHand
	public String addSecHand() throws Exception {

		String picture_name = null;
		if (picture.length() != 0) {
			 picture_name= getSavePath() + "\\" + getPictureFileName();
			FileOutputStream fileOutputStream = new FileOutputStream(
					picture_name);
			FileInputStream fileInputputStream = new FileInputStream(
					getPicture());

			int len = 0;
			byte[] b = new byte[1024];
			while ((len = fileInputputStream.read(b)) > 0) {
				fileOutputStream.write(b,len);
			}
		}
		String curdate = "";
		Date dt = new Date(); // 获取当前系统时间，作为发布时间
		SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd"); // 日期格式
		curdate = sdf.format(dt);

		HttpServletRequest request = ServletActionContext.getRequest();
		HttpSession session = request.getSession();
		int userId = (Integer) session.getAttribute("userId");
		// User
		User user = new User();
		user.setUserId(userId);
		SecHand secHand = new SecHand();
		secHand = secHandAuthorization.getSecHand();

		// 图片保存路径
		secHand.setSechandPicture(picture_name);
		// 发布者
		secHand.setUser(user);
		// 发布时间
		secHand.setSechandDate(curdate);

		secHandService.addSecHand(secHand);
		sechand_result = "/findAllSecHandAction.action";

		return "sechand_add";
	}

	// findSecHand

	public String findAllSecHand() {
		System.out.println("页数" + secHandAuthorization.getPage());
		List seclist = secHandService.findAllSecHand(
				secHandAuthorization.getPage(),15);

		// 放入session

		session.put("seclist",seclist);

		// sechand_result="sechand_findall";
		return "sechand_findall";

	}

	@Override
	public void setSession(Map<String,Object> arg0) {
		// TODO Auto-generated method stub
		this.session = arg0;
	}

	public File getPicture() {
		return picture;
	}

	public void setPicture(File picture) {
		this.picture = picture;
	}

	public String getPictureContentType() {
		return pictureContentType;
	}

	public void setPictureContentType(String pictureContentType) {
		this.pictureContentType = pictureContentType;
	}

	public String getPictureFileName() {
		return pictureFileName;
	}

	public void setPictureFileName(String pictureFileName) {
		this.pictureFileName = pictureFileName;
	}

	public String getSavePath() throws Exception {
		return ServletActionContext.getRequest().getRealPath(savePath);
	}

	public void setSavePath(String savePath) {
		this.savePath = savePath;
	}

	public String getSechand_result() {
		return sechand_result;
	}

	public void setSechand_result(String sechand_result) {
		this.sechand_result = sechand_result;
	}

}


（7）JSP页面就不贴出来啦，欢迎大家批评指正

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