1.首先新建一个maven工程,这里就不详细赘述了,下图是我的工程结构,红框圈出来的是这次设计的类以及配置文件的位置,注意:db.properties文件的位置
2.首先配置pom.xml,我主要配置了Junit依赖,MySql依赖,TestNG依赖,代码如下:
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">
3.在src/test/resources文件夹下面新建一个普通的file文件,命名db.properties,里面是配置的mysql的连接配置,注意:这是本地数据库,具体如何配置本地数据库请参照:https://www.jianshu.com/writer#/notebooks/34587789/notes/44947394
配置内容如下:
jdbc.driverClassName=com.mysql.cj.jdbc.Driver
jdbc.url=jdbc:mysql://localhost:3306/test?characterEncoding=utf-8&serverTimezone=UTC
jdbc.username=root
jdbc.password=123
4.在com.wx.parameter包下面新建testNG.xml配置文件,在这个文件下面配置参数dbconfig, poolsize的值,在测试类中就会通过dbconfig, poolsize这两个参数传值给测试类,如下图,就是将dbconfig赋值为db.properties,poolsize赋值为10
5.编写测试文件TestParameterXML.java,具体解释见下面注释:
package com.wx.parameter;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;
import java.util.Properties;
import org.testng.annotations.Parameters;
import org.testng.annotations.Test;
public class TestParameterXML {
Connection con;
@Test
@Parameters({ "dbconfig", "poolsize" })//传递testNG.xml中值
public void createConnection(String dbconfig, int poolsize) throws IOException, ClassNotFoundException {
//打印testNG.xml中的值
System.out.println("dbconfig=" + dbconfig);
System.out.println("poolsize=" + poolsize);
Properties properties = new Properties();
InputStream inputStream = null;
try {
//读取配置文件,注意db.properties的位置
inputStream =TestParameterXML.class.getClassLoader().getResourceAsStream("db.properties");
properties.load(inputStream);
//获取db.properties中的值
String driverClassName = properties.getProperty("jdbc.driverClassName");
String JDBCurl = properties.getProperty("jdbc.url");
String JDBCUsername = properties.getProperty("jdbc.username");
String JDBCPassword = properties.getProperty("jdbc.password");
//分别打印出db.properties中的值
System.out.println("driverClassName="+driverClassName);
System.out.println("url="+JDBCurl );
System.out.println("username="+JDBCUsername );
System.out.println("password="+JDBCPassword );
try {
Class.forName(driverClassName);
con = DriverManager.getConnection(JDBCurl, JDBCUsername, JDBCPassword);
} catch (SQLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
} catch (FileNotFoundException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} finally {
if (inputStream != null) {
try {
inputStream.close();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}
}
}
在TestParameterXML.java文件中右击,Run As --> Run Configurations
选择Suite和对应路径下面的testNG 文件,选择Run
结果如下:
6.在过程中所遇到的问题
(1)时区问题
报错:The server time zone value '�й���ʱ��' is unrecognized or represents more than one time zone. You must configure either the server or JDBC driver (via the serverTimezone configuration property) to use a more specifc time zone value if you want to utilize time zone support.
在配置文件db.properties中
jdbc.url=jdbc:mysql://localhost:3306/test?characterEncoding=utf-8 我没有设置时区,导致出现报错,修改为jdbc.url=jdbc:mysql://localhost:3306/testcharacterEncoding=utf-8&serverTimezone=UTC
(2)mysql的驱动过旧
报错:Loading class `com.mysql.jdbc.Driver'. This is deprecated. The new driver class is `com.mysql.cj.jdbc.Driver'. The driver is automatically registered via the SPI and manual loading of the driver class is generally unnecessary.
因为数据库驱动com.mysql.jdbc.Driver'已经被弃用了、应当使用新的驱动com.mysql.cj.jdbc.Driver'
在配置文件db.properties中
jdbc.driverClassName=com.mysql.jdbc.Driver
修改为jdbc.driverClassName=com.mysql.cj.jdbc.Driver
(3)db.properties文件的位置
我的Java文件在src/test/java目录下面,对应的配置文件应该写在src/test/resources下面,不然读取配置文件的时候会报错