带有 Gradle 的 Spring Boot 应用程序因 ./gradlew bootRun 而失败答案

【问题标题】：SpringBoot Application with Gradle fails with ./gradlew bootRun带有 Gradle 的 Spring Boot 应用程序因 ./gradlew bootRun 而失败
【发布时间】：2019-01-31 11:20:45
【问题描述】：

我在尝试使用 SpringBoot 构建介绍性应用程序时遇到问题。

我使用 Gradle 作为构建管理工具

build.gradle

buildscript {
    repositories {
        jcenter()
    }
    dependencies {

    }   
}
plugins {
    id 'org.springframework.boot' version '2.0.4.RELEASE'
}
apply plugin: 'java'
apply plugin: 'eclipse'
apply plugin: 'org.springframework.boot'
apply plugin: 'io.spring.dependency-management'

group = 'sia'
version = '0.0.1-SNAPSHOT'

description = "taco-cloud"

bootJar {
    baseName = 'taco-cloud'
    version = '0.1.0'
}

sourceCompatibility = 1.8
targetCompatibility = 1.8
tasks.withType(JavaCompile) {
    options.encoding = 'UTF-8'
}

repositories {
     mavenCentral()   
     maven { url "https://repo.spring.io/milestone" }
     maven { url "http://repo.maven.apache.org/maven2" }
}
dependencies {
    compile group: 'org.springframework.boot', name: "spring-boot-starter-data-jpa"
    compile group: 'org.springframework.boot', name: 'spring-boot-starter-thymeleaf', version:'2.0.0.M3'
    compile group: 'org.springframework.boot', name: 'spring-boot-starter-web', version:'2.0.0.M3'
    runtime group: 'org.springframework.boot', name: 'spring-boot-devtools', version:'2.0.0.M3'
    //providedRuntime group: 'org.springframework.boot', name: 'spring-boot-starter-tomcat'
    testCompile(group: 'org.springframework.boot', name: 'spring-boot-starter-test', version:'2.0.0.M3') {
exclude(module: 'commons-logging')
    }
}

我很确定这应该涵盖大部分依赖项。我只有几个课程和几个测试。

司机

/*
 * This Java source file was generated by the Gradle 'init' task.
 */
package tacos;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;

@SpringBootApplication
@EnableAutoConfiguration(exclude={DataSourceAutoConfiguration.class})
public class TacoCloudApplication {

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

控制器

package tacos;

import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.GetMapping;

@Controller
public class HomeController
{
    @GetMapping("/")
    public String home()
    {
        return "home";
    }
}

司机考试

/*
 * This Java source file was generated by the Gradle 'init' task.
 */
package tacos;

import org.junit.Test;
import org.junit.runner.RunWith;
import org.springframework.boot.test.context.SpringBootTest;
import org.springframework.test.context.junit4.SpringRunner;
//import static org.junit.Assert.*;

@RunWith(SpringRunner.class)

@SpringBootTest
public class TacoCloudApplicationTest {
    @Test 
    public void contextLoads() {

    }
}

控制器测试

package tacos;

import static org.hamcrest.Matchers.containsString;
import static org.springframework.test.web.servlet.request.MockMvcRequestBuilders.get;
import static org.springframework.test.web.servlet.result.MockMvcResultMatchers.content;
import static org.springframework.test.web.servlet.result.MockMvcResultMatchers.status;
import static org.springframework.test.web.servlet.result.MockMvcResultMatchers.view;

import org.junit.Test;
import org.junit.runner.RunWith;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.test.autoconfigure.web.servlet.WebMvcTest;
import org.springframework.test.context.junit4.SpringRunner;
import org.springframework.test.web.servlet.MockMvc;

@RunWith(SpringRunner.class)
@WebMvcTest(HomeController.class)
public class HomeControllerTest
{
    @Autowired
    private MockMvc mockMvc;

    @Test
    public void testHomePage() throws Exception
    {
        mockMvc.perform(get("/"))
        .andExpect(status().isOk())
        .andExpect(view().name("home"))
        .andExpect(content().string(containsString("Welcome to ...")));
    }
}

这应该是一个超级简单的应用程序，但我似乎缺少依赖项或 SpringApplication.run 无法发生的其他问题。我看过其他类似的帖子，但给出的解决方案没有多大意义。我从测试中得到的错误是：

java.lang.IllegalStateException: Failed to load ApplicationContext
    at org.springframework.test.context.cache.DefaultCacheAwareContextLoaderDelegate.loadContext(DefaultCacheAwareContextLoaderDelegate.java:125)
    at org.springframework.test.context.support.DefaultTestContext.getApplicationContext(DefaultTestContext.java:108)
    at org.springframework.test.context.web.ServletTestExecutionListener.setUpRequestContextIfNecessary(ServletTestExecutionListener.java:190)
    at org.springframework.test.context.web.ServletTestExecutionListener.prepareTestInstance(ServletTestExecutionListener.java:132)
    at org.springframework.test.context.TestContextManager.prepareTestInstance(TestContextManager.java:246)
    at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.createTest(SpringJUnit4ClassRunner.java:227)
    at org.springframework.test.context.junit4.SpringJUnit4ClassRunner$1.runReflectiveCall(SpringJUnit4ClassRunner.java:289)
    at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)
    at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.methodBlock(SpringJUnit4ClassRunner.java:291)
    at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.runChild(SpringJUnit4ClassRunner.java:246)
    at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.runChild(SpringJUnit4ClassRunner.java:97)
    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$2.evaluate(ParentRunner.java:268)
    at org.springframework.test.context.junit4.statements.RunBeforeTestClassCallbacks.evaluate(RunBeforeTestClassCallbacks.java:61)
    at org.springframework.test.context.junit4.statements.RunAfterTestClassCallbacks.evaluate(RunAfterTestClassCallbacks.java:70)
    at org.junit.runners.ParentRunner.run(ParentRunner.java:363)
    at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.run(SpringJUnit4ClassRunner.java:190)
    at org.gradle.api.internal.tasks.testing.junit.JUnitTestClassExecuter.runTestClass(JUnitTestClassExecuter.java:114)
    at org.gradle.api.internal.tasks.testing.junit.JUnitTestClassExecuter.execute(JUnitTestClassExecuter.java:57)
    at org.gradle.api.internal.tasks.testing.junit.JUnitTestClassProcessor.processTestClass(JUnitTestClassProcessor.java:66)
    at org.gradle.api.internal.tasks.testing.SuiteTestClassProcessor.processTestClass(SuiteTestClassProcessor.java:51)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:498)
    at org.gradle.internal.dispatch.ReflectionDispatch.dispatch(ReflectionDispatch.java:35)
    at org.gradle.internal.dispatch.ReflectionDispatch.dispatch(ReflectionDispatch.java:24)
    at org.gradle.internal.dispatch.ContextClassLoaderDispatch.dispatch(ContextClassLoaderDispatch.java:32)
    at org.gradle.internal.dispatch.ProxyDispatchAdapter$DispatchingInvocationHandler.invoke(ProxyDispatchAdapter.java:93)
    at com.sun.proxy.$Proxy1.processTestClass(Unknown Source)
    at org.gradle.api.internal.tasks.testing.worker.TestWorker.processTestClass(TestWorker.java:109)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:498)
    at org.gradle.internal.dispatch.ReflectionDispatch.dispatch(ReflectionDispatch.java:35)
    at org.gradle.internal.dispatch.ReflectionDispatch.dispatch(ReflectionDispatch.java:24)
    at org.gradle.internal.remote.internal.hub.MessageHubBackedObjectConnection$DispatchWrapper.dispatch(MessageHubBackedObjectConnection.java:146)
    at org.gradle.internal.remote.internal.hub.MessageHubBackedObjectConnection$DispatchWrapper.dispatch(MessageHubBackedObjectConnection.java:128)
    at org.gradle.internal.remote.internal.hub.MessageHub$Handler.run(MessageHub.java:404)
    at org.gradle.internal.concurrent.ExecutorPolicy$CatchAndRecordFailures.onExecute(ExecutorPolicy.java:63)
    at org.gradle.internal.concurrent.ManagedExecutorImpl$1.run(ManagedExecutorImpl.java:46)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
    at org.gradle.internal.concurrent.ThreadFactoryImpl$ManagedThreadRunnable.run(ThreadFactoryImpl.java:55)
    at java.lang.Thread.run(Thread.java:748)

使用 ./gradlew bootRun 的错误类似，因为应用程序上下文永远不会加载。真的很困惑，因为这应该是一个不费吹灰之力的介绍练习。最初的练习是一个 Maven 构建，所以我不确定这是否有什么不同。

超级卡住....

【问题讨论】：

您是否设置了与数据库的连接属性？
此应用程序不需要或配置持久性。
@Rcordoval - 这实际上是其中的一部分，这很有趣。我需要添加两个额外的导入：import org.springframework.boot.autoconfigure.EnableAutoConfiguration；导入 org.springframework.boot.autoconfigure.jdbc.DataSourceAutoConfiguration；然后我需要注释 TocoCloudApplication：@EnableAutoConfiguration(exclude={DataSourceAutoConfiguration.class}) 但是，当测试通过时，应用程序将不会使用 ./gradlew bootRun 运行

标签： java spring spring-boot

【解决方案1】：

在@Rcordoval 和post 的帮助下，我能够解决测试和 bootRun 任务失败的问题。

我需要解决自动配置正在尝试的问题。这也试图配置一个 jdbc 数据库。因此，我不得不更新驱动程序类，就像使用几个导入和一个新注释来排除尝试配置数据库一样。

package tacos;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.EnableAutoConfiguration;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.boot.autoconfigure.jdbc.DataSourceAutoConfiguration;

@SpringBootApplication
@EnableAutoConfiguration(exclude={DataSourceAutoConfiguration.class})
public class TacoCloudApplication {

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

最后，链接的帖子向我指出了 bootRun 任务的最后一期。我只是从 build.gradle 中删除了 spring-boot-devtools 依赖项的版本。现在应用程序在 tomcat 中启动并且测试通过了。

【讨论】：