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该文供以下文章的参考内容:
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bean类:
package com.evenif.bean;
public class Index {
private int id;
private String name;
public Index() {
System.out.println("create Index class");
}
public Index(int id, String name) {
this.id = id;
this.name = name;
}
public int getId() {
return id;
}
public void setId(int id) {
this.id = id;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
@Override
public String toString() {
return "Index{" +
"id=" + id +
", name='" + name + '\'' +
'}';
}
}
dao层:
package com.evenif.dao;
import com.evenif.bean.Index;
public interface IndexDao {
public Index getIndex();
}
dao层实现:
实现1:
package com.evenif.dao.impl;
import com.evenif.bean.Index;
import com.evenif.dao.IndexDao;
public class IndexMysqlDaoImpl implements IndexDao {
@Override
public Index getIndex() {
// 假装是从数据库获取的Index对象
return new Index(2,"mysql02");
}
}
实现2
package com.evenif.dao.impl;
import com.evenif.bean.Index;
import com.evenif.dao.IndexDao;
public class IndexOralceDaoImpl implements IndexDao {
@Override
public Index getIndex() {
// 假装是从数据库获取的Index对象
return new Index(3,"oralce03");
}
}
service层:
package com.evenif.service;
import com.evenif.bean.Index;
public interface IndexService {
public Index getIndex();
}
service层实现:
package com.evenif.service.impl;
import com.evenif.bean.Index;
import com.evenif.dao.IndexDao;
import com.evenif.service.IndexService;
public class IndexServiceImpl implements IndexService {
private IndexDao indexDao;
public void setIndexDao(IndexDao indexDao) {
this.indexDao = indexDao;
}
@Override
public Index getIndex() {
return indexDao.getIndex();
}
}
测试:
package com.evenif;
import com.evenif.service.IndexService;
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;
public class Main {
public static void main(String[] args) {
//注意这个xml文件位置要放对
ApplicationContext context = new ClassPathXmlApplicationContext("beans.xml");
IndexService indexService = (IndexService) context.getBean("indexService");
System.out.println(indexService.getIndex());
}
}
//执行结果:
//Index{id=2, name='mysql02'}
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