Question

我有一个Spring-boot应用程序。我想在类方法中使用application.properties中的变量，但我有nullPointerException。

这是一个不起作用的简单例子。

application.properties：

#data paths
file.path=C:\\Users\\apodar\\autoTest

Config.java

package com.eserv.autotest;

import org.springframework.beans.factory.annotation.Value;
import org.springframework.stereotype.Component;

@Component
public class Config {

@Value("${file.path}")
String filePath;

    public String getFilePath() { return filePath; }
    public String getScreenshotsPath() {
        return getFilePath() + "/screenshots";
       }

}

AutotestApplication.java

package com.eserv.autotest;

import org.apache.tomcat.jdbc.pool.DataSource;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.CommandLineRunner;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.transaction.annotation.Transactional;


@SpringBootApplication(
        scanBasePackageClasses = {
            AutotestApplication.class,
       }
)
public class AutotestApplication implements CommandLineRunner {


    @Autowired DataSource dataSource;

    public static void main(String[] args) {
        SpringApplication.run(AutotestApplication.class, args);
    }

    @Transactional(readOnly = true)
    @Override
    public void run(String... args) throws Exception {

         System.out.println("DATASOURCE = " + dataSource);

    }
 }

SeleniumTestExecutionListener：

    public class SeleniumTestExecutionListener extends AbstractTestExecutionListener {

    @Inject Config config;

    private WebDriver webDriver;

    @Override
    public void afterTestMethod(TestContext testContext) throws Exception {
        if (testContext.getTestException() == null) {
            return;
        }
        File screenshot = ((TakesScreenshot) webDriver).getScreenshotAs(OutputType.FILE);
        String testName = toLowerUnderscore(testContext.getTestClass().getSimpleName());
        String methodName = toLowerUnderscore(testContext.getTestMethod().getName());

        FileUtils.copyFile(screenshot, new File( config.getScreenshotsPath() + testName + "_" + methodName + "_" + screenshot.getName()));
    }

}

为什么config.getScreenshotsPath()方法不返回路径。 config为空。

Answer 1

TestExecutionListener中的自动装配将无效。 TestExecutionListener实例的创建和生命周期由Spring的Test Context框架管理，它不是ApplicationContext的一部分，而是外部的。因此，自动接线不起作用。

如果您想在TestExecutionListener中使用bean，而是从ApplicationContext检索TestContext。

@Override
public void afterTestMethod(TestContext testContext) throws Exception {
    if (testContext.getTestException() == null) {
        return;
    }

    final Config config = testContext.getApplicationContext().getBean(Config.class);
    File screenshot = ((TakesScreenshot) webDriver).getScreenshotAs(OutputType.FILE);
    String testName = toLowerUnderscore(testContext.getTestClass().getSimpleName());
    String methodName = toLowerUnderscore(testContext.getTestMethod().getName());

    FileUtils.copyFile(screenshot, new File( config.getScreenshotsPath() + testName + "_" + methodName + "_" + screenshot.getName()));
}

在类方法

1 个答案: