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spring3.1使用JDBC数据源datasource的异常有关问题

热度:3904   发布时间:2013-02-25 21:18:37
spring3.1使用JDBC数据源datasource的错误问题
JAR包:
junit-4.10.jar
org.springframework.beans-3.1.1.RELEASE.jar
org.springframework.context-3.1.1.RELEASE.jar
org.springframework.core-3.1.1.RELEASE.jar
org.springframework.asm-3.1.1.RELEASE.jar
org.springframework.expression-3.1.1.RELEASE.jar
org.springframework.jdbc-3.1.1.RELEASE.jar
commons-logging.jar
mysql-connector-java-5.1.18-bin.jar

1、User类
Java code
package com.model;public class User {    private int id;    private String 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;    }}


2、UserDAO接口
Java code
package com.dao;import com.model.User;public interface UserDAO {    public void save(User u);}

3、UserDAOImpl实现类
Java code
package com.dao.impl;import java.sql.Connection;import java.sql.SQLException;import javax.annotation.Resource;import javax.sql.DataSource;import org.springframework.stereotype.Component;import com.dao.UserDAO;import com.model.User;@Component("userDAO")public class UserDAOImpl implements UserDAO {        private DataSource dataSource ;    public DataSource getDataSource() {        return dataSource;    }    @Resource(name="dataSource")    public void setDataSource(DataSource dataSource) {        this.dataSource = dataSource;    }    @Override    public void save(User u) {        try {            Connection conn = dataSource.getConnection();            conn.createStatement().executeUpdate("insert into user values(null,'lisi')");            conn.close();        } catch (SQLException e) {            // TODO Auto-generated catch block            e.printStackTrace();        }                System.out.println("A user saved!");            }}

4、UserService类
Java code
package com.service;import javax.annotation.Resource;import org.springframework.stereotype.Component;import com.dao.UserDAO;import com.dao.impl.UserDAOImpl;import com.model.User;@Component("userService")public class UserService {    private UserDAO userDAO = new UserDAOImpl();    public UserDAO getUserDAO() {        return userDAO;    }    @Resource(name="userDAO")    public void setUserDAO(UserDAO userDAO) {        this.userDAO = userDAO;    }        public void add(User u) {        userDAO.save(u);    }}

5、UserServiceTest测试类
Java code
package com.test;import org.junit.Test;import org.springframework.context.ApplicationContext;import org.springframework.context.support.ClassPathXmlApplicationContext;import com.model.User;import com.service.UserService;public class UserServiceTest {    @Test    public void testAdd() {        User u = new User();        ApplicationContext context = new ClassPathXmlApplicationContext(new String[]{"beans.xml"});        UserService userService = (UserService)context.getBean("userService");        userService.add(u);    }}



------解决方案--------------------------------------------------------
还有你既然用了spring的注解干嘛还要用java的注解

进行依赖注入的时候用@Autowired不是很好么,get setter方法都不用添加,如果想要更加可观赏性那就这样
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