依赖注入有三种方式：
1接口注入：
接口注入的意思是通过接口来实现信息的注入，而其它的类要实现该接口时，就可以实现了注入：
下面是代码

Java代码

1. publicinterfaceManager{
2. publicvoidmanage(Businessbusiness);
3. }
5. publicclassxx{
6. privateBusinessbusiness;
7. publicvoidmanage(Businessbusiness){
8. this.business=business;
9. }
10. }

public interface Manager{
 public void manage(Business business);
}

public class xx {
private Business business;
public void manage(Business business){
this.business = business;
}
}

2 Set注入:
通过set方法来注入

Java代码

1. publicclassxx{
2. privateManagermanage;
3. publicvoidsetManager(Managermanage){
4. this.manage=manage;
5. }
6. }

public class xx {
private Manager manage;
public void setManager(Manager manage){
this.manage= manage;
}
}

3 构造注入：
通过构造函数来注入

Java代码

1. publicclassxx{
2. privateManagermanage;
3. publicxx(Managermanage){
4. this.manage=manage;
5. }
6. }

@H_230_301@public class xx { private Manager manage; public xx(Manager manage){ this.manage= manage; } }
当然通过不同的注入方式，config.xml的配置是不同的。