基于java连接mysql数据库单元测试查询数据实例源码,今天要给各位朋友带来的是一篇java实现连接mysql数据库单元测试查询数据的实例代码,小编觉得很有参考价值,所以分享给大家,有兴趣的朋友收藏了吧。
1、按照javaweb项目的要求逐步建立搭建起机构,具体的类包有:model 、db、dao、test;
具体架构如下图:
2、根据搭建的项目架构新建数据库test和数据库表t_userinfo并添加对应的测试数据; (在此本人使用的是绿色版的数据库,下载地址:http://pan.baidu.com/s/1mg88YAc)
具体的建立数据库操作如下图:
3、编写包中的各种类代码,具体代码如下:
UserInfo.java
package com.org.user.model;
/**
* @ClassName: UserInfo
* @Description:TODO封装对象的信息
* @author: gaoxing
*/
public class UserInfo {
private int userid;
private String username;
private String password;
/**
* @Title: UserInfo
* @Description: TODO(描述这个方法的作用)
* @param: @param userid
* @param: @param username
* @param: @param password
* @throws
*/
public UserInfo(int userid, String username, String password) {
super();
this.userid = userid;
this.username = username;
this.password = password;
}
/**
* @Title: UserInfo
* @Description: TODO无参的构造方法
* @param:
* @throws
*/
public UserInfo() {
super();
}
public int getUserid() {
return userid;
}
public void setUserid(int userid) {
this.userid = userid;
}
public String getUsername() {
return username;
}
public void setUsername(String username) {
this.username = username;
}
public String getPassword() {
return password;
}
public void setPassword(String password) {
this.password = password;
}
}
UserInfoDBManger.java
package com.org.user.db;
import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.SQLException;
import com.mysql.jdbc.Connection;
import com.mysql.jdbc.PreparedStatement;
/**
* @ClassName: UserInfoDBManger
* @Description:TODO连接数据库的操作
* @author: gaoxing
*/
public class UserInfoDBManger {
private static Connection conn = null;
private PreparedStatement ps = null;
private ResultSet rs = null;
public static Connection getConn() {
String url = "jdbc:mysql://localhost:3306/test";
try {
Class.forName("com.mysql.jdbc.Driver");
try {
conn = (Connection) DriverManager.getConnection(url, "root",
"mysql");
} catch (SQLException e) {
System.out.println(e.getMessage());
}
} catch (ClassNotFoundException e) {
System.out.println(e.getMessage());
}
return conn;
}
public void close() {
try {
rs.close();
ps.close();
conn.close();
} catch (SQLException e) {
e.getMessage();
}
}
}
UserInfoDao.java
package com.org.user.dao;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.util.ArrayList;
import java.util.List;
import com.mysql.jdbc.Connection;
import com.mysql.jdbc.PreparedStatement;
import com.org.user.db.UserInfoDBManger;
import com.org.user.model.UserInfo;
/**
* @ClassName: UserInfoDao
* @Description:TODO处理通过数据库的连接进行操作对象信息
* @author: gaoxing
*/
public class UserInfoDao {
Connection conn=null;
PreparedStatement ps=null;
ResultSet rs=null;
public List<UserInfo> find(){
List<UserInfo> list=new ArrayList<UserInfo>();
String sql="select * from t_userinfo ";
conn=UserInfoDBManger.getConn();
try {
ps=(PreparedStatement) conn.prepareStatement(sql);
rs=ps.executeQuery();
while (rs.next()) {
UserInfo ui=new UserInfo();
ui.setUserid(rs.getInt(1));
ui.setUsername(rs.getString(2));
ui.setPassword(rs.getString(3));
list.add(ui);
}
} catch (SQLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
return list;
}
}
UserInfoTest.java
/**
* FileName: UserInfoTest.java
* @Description: TODO测试dao包的方法
* Copyright: personage
* Company personage
* @author: gaoxing
* @version V1.0
*
* Modification History:
* Date Author Version Discription
* Why & What is modified: <修改原因描述>
*/
package com.org.user.test;
import static org.junit.Assert.*;
import java.util.List;
import org.junit.AfterClass;
import org.junit.BeforeClass;
import org.junit.Test;
import com.org.user.dao.UserInfoDao;
import com.org.user.model.UserInfo;
/**
* @ClassName: UserInfoTest
* @Description:TODO 测试dao包的方法
* @author: gaoxing
*/
public class UserInfoTest {
/**
* @Title: setUpBeforeClass
* @Description: TODO(描述这个方法的作用)
* @param: @throws java.lang.Exception
* @return: void
* @throws
*/
@BeforeClass
public static void setUpBeforeClass() throws Exception {
}
/**
* @Title: tearDownAfterClass
* @Description: TODO(描述这个方法的作用)
* @param: @throws java.lang.Exception
* @return: void
* @throws
*/
@AfterClass
public static void tearDownAfterClass() throws Exception {
}
/**
* Test method for {@link com.org.user.dao.UserInfoDao#find()}.
*/
@Test
public void testFind() {
UserInfoDao udao=new UserInfoDao();
List<UserInfo> list=udao.find();
for (int i = 0; i < list.size(); i++) {
UserInfo ui=list.get(i);
System.out.println("名称: "+ui.getUsername()+"密码: "+ui.getPassword());
}
}
}
4、在编写好类内容以后,在搭建项目的过程当中要加入辅助的JUnit的测试包junit.jar,同时还需要导入数据库的连接mysq-connector-java-5.1.7-bin.jar sqljdbc.jar,这样才能够连接到数据库;
5、所有工作都做好以后,就能够启动服务进行运行了查看结果了,要是在JUnit测试台和控制台出现如下结果就说明项目运行成功了。