JAVA加载properties配置文件出错怎么办？

[人到中年不得已]

看教程中有个加载jdbc.properties



import java.io.InputStream;
import java.sql.DriverManager;
import java.util.Properties;

import org.junit.Test;

import com.mysql.jdbc.Connection;

public class JdbcTest {
/**
* @throws Exception
*
*/
@Test
public void testJdbc() throws Exception {

// 用类加载器加载Properties
Properties ps = new Properties();

InputStream inStream = Object.class.getClassLoader().getResourceAsStream("jdbc.properties");

ps.load(inStream);

String user = ps.getProperty("user");
String password = ps.getProperty("password");
String jdbcUrl = ps.getProperty("jdbcUrl");
String driverClass = ps.getProperty("driverClass");

Class.forName(driverClass);

// 获取数据库连接
Connection conn = (Connection) DriverManager.getConnection(jdbcUrl, user, password);
System.out.println(conn);
}
}

在src根目录下有jdbc.properties这个文件！但运行时出java.lang.NullPointerException
at com.huaan.test.JdbcTest.testJdbc(JdbcTest.java:22)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:50)
at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)
at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:47)
at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17)
at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:325)
at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:78)
at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:57)
at org.junit.runners.ParentRunner$3.run(ParentRunner.java:290)
at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:71)
at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:288)
at org.junit.runners.ParentRunner.access$000(ParentRunner.java:58)
at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:268)
at org.junit.runners.ParentRunner.run(ParentRunner.java:363)
at org.eclipse.jdt.internal.junit4.runner.JUnit4TestReference.run(JUnit4TestReference.java:86)
at org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:38)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:459)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:678)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:382)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:192)

[人到中年不得已]

解决了！ 将InputStream inStream = Object.class.getClassLoader().getResourceAsStream("jdbc.properties");中的Object换成JdbcTest就行了！

[尼古拉斯-全蛋]