spring 错误(org.springframework.beans.NotWritablePropertyException)
org.springframework.beans.NotWritablePropertyException: Invalid property &＃39;postDao&＃39; of bean class&＃xff1f;
出现异常的原因是在application-xxx.xml中property name的错误。
&＃xff1c;property name&＃61;"...."&＃xff1e; 中name的名字是与bean的set方法相关的&＃xff0c;而且要注意大小写。
比如:
public class PostManageImpl extends BaseManage implements PostManage {
private PostDAO dao &＃61; null;
public void setPostDAO(PostDAO postDAO){
this.dao &＃61; postDAO;
}
} 那么xml的定义应该是&＃xff1a;
&＃xff1c;bean id&＃61;"postManage" parent&＃61;"txProxyTemplate"&＃xff1e;
&＃xff1c;property name&＃61;"target"&＃xff1e;
&＃xff1c;bean class&＃61;"com.yz.spring.service.implement.PostManageImpl"&＃xff1e;
&＃xff1c;property name&＃61;"postDAO"&＃xff1e;&＃xff1c;ref bean&＃61;"postDAO"/&＃xff1e;&＃xff1c;/property&＃xff1e; 对
&＃xff1c;property name&＃61;"dao"&＃xff1e;&＃xff1c;ref bean&＃61;"postDAO"/&＃xff1e;&＃xff1c;/property&＃xff1e; 错
&＃xff1c;/bean&＃xff1e;
&＃xff1c;/property&＃xff1e;
&＃xff1c;/bean&＃xff1e;
package com.bjsxt.spring.dao;
public interface UserDao {
public void save(String username, String password);
}
package com.bjsxt.spring.dao;
public class UserDao4MySqlImpl implements UserDao {
public void save(String username, String password) {
System.out.println("--------UserDao4MySqlImpl.save()-------");
}
}
package com.bjsxt.spring.manager;
public interface UserManager {
public void save(String username, String password);
}
//注意set方法是在用到bean的class文件中定义&＃xff0c;而不是在对应的DAO实现中定义
package com.bjsxt.spring.manager;
import com.bjsxt.spring.dao.UserDao;
public class UserManagerImpl implements UserManager {
private UserDao userDao;
// public UserManagerImpl(UserDao userDao) {
// this.userDao &＃61; userDao;
// }
public void save(String username, String password) {
this.userDao.save(username, password);
}
public void setUserDao(UserDao userDao) {
this.userDao &＃61; userDao;
}
}
xmlns:xsi&＃61;"http://www.w3.org/2001/XMLSchema-instance"
xmlns:aop&＃61;"http://www.springframework.org/schema/aop"
xmlns:tx&＃61;"http://www.springframework.org/schema/tx"
xsi:schemaLocation&＃61;"http://www.springframework.org/schema/beanshttp://www.springframework.org/schema/beans/spring-beans-2.0.xsd
http://www.springframework.org/schema/aophttp://www.springframework.org/schema/aop/spring-aop-2.0.xsd
http://www.springframework.org/schema/txhttp://www.springframework.org/schema/tx/spring-tx-2.0.xsd">
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