Spring MVC Junit测试实例 附:读取WEB-INF下配置文件的方法

本文介绍如何在Spring MVC项目中进行单元测试,包括如何通过JUnit测试Spring MVC Dao类和Controller类,以及如何正确配置和读取配置文件以避免空指针错误。此外,还详细解释了在不同位置读取配置文件的方法,并解决了引入Junit版本冲突导致的错误。

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Spring+Unit测试实例:
之前写过一个连接数据库的spring mvc annotation的一个实例(点击这里查看)。
当我们启动Web项目时要先启动Tomcat,而在Tomcat的启动过程中会读取spring项目的的各个配置文件,实例化各个注入的类,所以我们的程序中直接使用注解就可以操作各个类。

但是如果按普通的项目测试,就缺少了读取配置文件的过程,所以当你调用一个类方法时会出现空指针错误,因为类没有实例化。

对Spring MVC Dao的JUnit的测试。

下面是对上面提到的实例中的UserDao.class的测试,内容如下:

package org.spring.wayne.dao;

import org.junit.Test;
import org.junit.runner.RunWith;
import org.spring.wayne.web.form.User;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.test.context.ContextConfiguration;
import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;

@RunWith(SpringJUnit4ClassRunner.class)
@ContextConfiguration(locations = { "file:WebContent/WEB-INF/springMVCForm-servlet.xml" })
public class UserDaoTest {

	@Autowired
	private UserDao userDao;

	@Test
	public void test() {
		User user = new User();
		user.setUserName("u");
		user.setPassword("p");
		userDao.addUser(user);
	}

}
右键->Run as->JUnit Test运行,无误。查询数据库显示已经插入数据库。

对Spring MVC Controller的JUnit的测试。

下面是对上面提到的实例中的RegController.class的测试,内容如下:

package org.spring.wayne.web.controller;

import static org.junit.Assert.assertEquals;

import org.junit.After;
import org.junit.Before;
import org.junit.Test;
import org.mockito.Mock;
import org.mockito.Mockito;
import org.mockito.MockitoAnnotations;
import org.spring.wayne.web.form.User;
import org.springframework.mock.web.MockHttpServletRequest;
import org.springframework.mock.web.MockHttpServletResponse;
import org.springframework.ui.ExtendedModelMap;
import org.springframework.ui.Model;
import org.springframework.validation.BindingResult;

public class RegControllerTest {

	@Mock
	private BindingResult mockBindingResult;
	
	@Before
	public void setUp() {
		MockitoAnnotations.initMocks(this);
		Mockito.when(mockBindingResult.hasErrors()).thenReturn(true);
	}

	@Test
	public void test() throws Exception {
		MockHttpServletRequest request = new MockHttpServletRequest();
		MockHttpServletResponse response = new MockHttpServletResponse();
		RegController regController = new RegController();
		Model model = new ExtendedModelMap();
		User user = new User();
		user.setUserName("uuuuuuu");
		user.setPassword("ppppppp");
		String result = regController.handler(user, mockBindingResult, model, request, response);
		System.out.println(result);
		assertEquals("register", result);
	}

	@After
	public void destroy() {

	}
}
右键->Run as->JUnit Test运行,无误





读取WEB-INF下配置文件的方法:

配置文件放在class目录下:

ApplicationContext applicationContext = new ClassPathXmlApplicationContext("springMVCForm-servlet.xml");

WEB-INF下:

ApplicationContext applicationContext = new FileSystemXmlApplicationContext("WebContent/WEB-INF/springMVCForm-servlet.xml");

多个文件可用*表示:

ApplicationContext applicationContext = new FileSystemXmlApplicationContext("WebContent/WEB-INF/springMVCForm-*.xml");
注解方式:

配置文件放在class目录下:

@ContextConfiguration(locations={"classpath:springMVCForm-servlet.xml"})

WEB-INF下:

@ContextConfiguration(locations={"file:WebContent/WEB-INF/springMVCForm-servlet.xml"})

使用注解时,Junit报错:

java.lang.NoSuchFieldError: NULL
	at org.junit.runners.ParentRunner.<init>(ParentRunner.java:48)
	at org.junit.runners.BlockJUnit4ClassRunner.<init>(BlockJUnit4ClassRunner.java:58)
	at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.<init>(SpringJUnit4ClassRunner.java:104)
	at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
	at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:39)
	at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:27)
	at java.lang.reflect.Constructor.newInstance(Constructor.java:513)
	at org.junit.internal.requests.ClassRequest.buildRunner(ClassRequest.java:33)
	at org.junit.internal.requests.ClassRequest.getRunner(ClassRequest.java:28)
	at org.eclipse.jdt.internal.junit4.runner.JUnit4TestReference.<init>(JUnit4TestReference.java:33)
	at org.eclipse.jdt.internal.junit4.runner.JUnit4TestClassReference.<init>(JUnit4TestClassReference.java:25)
	at org.eclipse.jdt.internal.junit4.runner.JUnit4TestLoader.createTest(JUnit4TestLoader.java:48)
	at org.eclipse.jdt.internal.junit4.runner.JUnit4TestLoader.loadTests(JUnit4TestLoader.java:38)
	at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:452)
	at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:683)
	at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:390)
	at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:197)
经检查是jar包冲突,我在建项目的时候,myeclipse有自动加入junit4,而后面我又自己加入Junit4.8.1。
如果报以下错误,则是junit包版本太低,需要4.5或以上的版本:
Caused by: java.lang.ClassNotFoundException: org.junit.runners.BlockJUnit4ClassRunner  
    at java.net.URLClassLoader$1.run(URLClassLoader.java:200)  
    at java.security.AccessController.doPrivileged(Native Method)  
    at java.net.URLClassLoader.findClass(URLClassLoader.java:188)  
    at java.lang.ClassLoader.loadClass(ClassLoader.java:307)  
    at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:301)  
    at java.lang.ClassLoader.loadClass(ClassLoader.java:252)  
    at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:320)

#


排查结果如下: 1.使用mvn dependency:tree返回如下信息: [INFO] --- maven-dependency-plugin:3.1.2:tree (default-cli) @ zysygh --- [INFO] com.ghzy:zysygh:jar:0.1.196 [INFO] +- org.springframework.boot:spring-boot-starter-data-redis:jar:2.2.13.RELEASE:compile [INFO] | +- org.springframework.boot:spring-boot-starter:jar:2.2.13.RELEASE:compile [INFO] | | +- org.springframework.boot:spring-boot:jar:2.2.13.RELEASE:compile [INFO] | | +- org.springframework.boot:spring-boot-autoconfigure:jar:2.2.13.RELEASE:compile [INFO] | | +- jakarta.annotation:jakarta.annotation-api:jar:1.3.5:compile [INFO] | | \- org.yaml:snakeyaml:jar:1.25:runtime [INFO] | +- org.springframework.data:spring-data-redis:jar:2.2.12.RELEASE:compile [INFO] | | +- org.springframework.data:spring-data-keyvalue:jar:2.2.12.RELEASE:compile [INFO] | | | \- org.springframework.data:spring-data-commons:jar:2.2.12.RELEASE:compile [INFO] | | +- org.springframework:spring-tx:jar:5.2.12.RELEASE:compile [INFO] | | +- org.springframework:spring-oxm:jar:5.2.12.RELEASE:compile [INFO] | | \- org.springframework:spring-aop:jar:5.2.12.RELEASE:compile [INFO] | \- io.lettuce:lettuce-core:jar:5.2.2.RELEASE:compile [INFO] | +- io.netty:netty-common:jar:4.1.58.Final:compile [INFO] | +- io.netty:netty-handler:jar:4.1.58.Final:compile [INFO] | | +- io.netty:netty-resolver:jar:4.1.58.Final:compile [INFO] | | +- io.netty:netty-buffer:jar:4.1.58.Final:compile [INFO] | | \- io.netty:netty-codec:jar:4.1.58.Final:compile [INFO] | +- io.netty:netty-transport:jar:4.1.58.Final:compile [INFO] | \- io.projectreactor:reactor-core:jar:3.3.13.RELEASE:compile [INFO] | \- org.reactivestreams:reactive-streams:jar:1.0.3:compile [INFO] +- org.springframework.boot:spring-boot-starter-mail:jar:2.2.13.RELEASE:compile [INFO] | +- org.springframework:spring-context-support:jar:5.2.12.RELEASE:compile [INFO] | | +- org.springframework:spring-beans:jar:5.2.12.RELEASE:compile [INFO] | | \- org.springframework:spring-context:jar:5.2.12.RELEASE:compile [INFO] | \- com.sun.mail:jakarta.mail:jar:1.6.5:compile [INFO] | \- com.sun.activation:jakarta.activation:jar:1.2.2:compile [INFO] +- org.springframework.boot:spring-boot-starter-thymeleaf:jar:2.2.13.RELEASE:compile [INFO] | +- org.thymeleaf:thymeleaf-spring5:jar:3.0.12.RELEASE:compile [INFO] | | \- org.thymeleaf:thymeleaf:jar:3.0.12.RELEASE:compile [INFO] | | +- org.attoparser:attoparser:jar:2.0.5.RELEASE:compile [INFO] | | \- org.unbescape:unbescape:jar:1.1.6.RELEASE:compile [INFO] | \- org.thymeleaf.extras:thymeleaf-extras-java8time:jar:3.0.4.RELEASE:compile [INFO] +- org.springframework.boot:spring-boot-starter-web:jar:2.2.13.RELEASE:compile [INFO] | +- org.springframework.boot:spring-boot-starter-json:jar:2.2.13.RELEASE:compile [INFO] | | +- com.fasterxml.jackson.datatype:jackson-datatype-jdk8:jar:2.10.5:compile [INFO] | | +- com.fasterxml.jackson.datatype:jackson-datatype-jsr310:jar:2.10.5:compile [INFO] | | \- com.fasterxml.jackson.module:jackson-module-parameter-names:jar:2.10.5:compile [INFO] | +- org.springframework.boot:spring-boot-starter-tomcat:jar:2.2.13.RELEASE:compile [INFO] | | +- org.apache.tomcat.embed:tomcat-embed-core:jar:9.0.41:compile [INFO] | | +- org.apache.tomcat.embed:tomcat-embed-el:jar:9.0.41:compile [INFO] | | \- org.apache.tomcat.embed:tomcat-embed-websocket:jar:9.0.41:compile [INFO] | +- org.springframework.boot:spring-boot-starter-validation:jar:2.2.13.RELEASE:compile [INFO] | | +- jakarta.validation:jakarta.validation-api:jar:2.0.2:compile [INFO] | | \- org.hibernate.validator:hibernate-validator:jar:6.0.22.Final:compile [INFO] | | +- org.jboss.logging:jboss-logging:jar:3.4.1.Final:compile [INFO] | | \- com.fasterxml:classmate:jar:1.5.1:compile [INFO] | +- org.springframework:spring-web:jar:5.2.12.RELEASE:compile [INFO] | \- org.springframework:spring-webmvc:jar:5.2.12.RELEASE:compile [INFO] | \- org.springframework:spring-expression:jar:5.2.12.RELEASE:compile [INFO] +- org.mybatis.spring.boot:mybatis-spring-boot-starter:jar:2.3.2:compile [INFO] | +- org.springframework.boot:spring-boot-starter-jdbc:jar:2.2.13.RELEASE:compile [INFO] | | +- com.zaxxer:HikariCP:jar:3.4.5:compile [INFO] | | \- org.springframework:spring-jdbc:jar:5.2.12.RELEASE:compile [INFO] | +- org.mybatis.spring.boot:mybatis-spring-boot-autoconfigure:jar:2.3.2:compile [INFO] | \- org.mybatis:mybatis-spring:jar:2.1.2:compile [INFO] +- org.springframework.boot:spring-boot-starter-logging:jar:2.2.13.RELEASE:compile [INFO] | +- ch.qos.logback:logback-classic:jar:1.2.3:compile [INFO] | | \- ch.qos.logback:logback-core:jar:1.2.3:compile [INFO] | \- org.slf4j:jul-to-slf4j:jar:1.7.30:compile [INFO] +- mysql:mysql-connector-java:jar:8.0.26:runtime [INFO] +- org.projectlombok:lombok:jar:1.18.16:compile (optional) [INFO] +- org.springframework.boot:spring-boot-starter-test:jar:2.2.13.RELEASE:test [INFO] | +- org.springframework.boot:spring-boot-test:jar:2.2.13.RELEASE:test [INFO] | +- org.springframework.boot:spring-boot-test-autoconfigure:jar:2.2.13.RELEASE:test [INFO] | +- com.jayway.jsonpath:json-path:jar:2.4.0:test [INFO] | | \- net.minidev:json-smart:jar:2.3:test [INFO] | | \- net.minidev:accessors-smart:jar:1.2:test [INFO] | | \- org.ow2.asm:asm:jar:5.0.4:test [INFO] | +- jakarta.xml.bind:jakarta.xml.bind-api:jar:2.3.3:test [INFO] | | \- jakarta.activation:jakarta.activation-api:jar:1.2.2:test [INFO] | +- org.junit.jupiter:junit-jupiter:jar:5.5.2:test [INFO] | | +- org.junit.jupiter:junit-jupiter-api:jar:5.5.2:test [INFO] | | | +- org.opentest4j:opentest4j:jar:1.2.0:test [INFO] | | | \- org.junit.platform:junit-platform-commons:jar:1.5.2:test [INFO] | | +- org.junit.jupiter:junit-jupiter-params:jar:5.5.2:test [INFO] | | \- org.junit.jupiter:junit-jupiter-engine:jar:5.5.2:test [INFO] | +- org.junit.vintage:junit-vintage-engine:jar:5.5.2:test [INFO] | | +- org.apiguardian:apiguardian-api:jar:1.1.0:test [INFO] | | +- org.junit.platform:junit-platform-engine:jar:1.5.2:test [INFO] | | \- junit:junit:jar:4.12:test [INFO] | +- org.mockito:mockito-junit-jupiter:jar:3.1.0:test [INFO] | +- org.assertj:assertj-core:jar:3.13.2:test [INFO] | +- org.hamcrest:hamcrest:jar:2.1:test [INFO] | +- org.mockito:mockito-core:jar:3.1.0:test [INFO] | | +- net.bytebuddy:byte-buddy:jar:1.10.19:test [INFO] | | +- net.bytebuddy:byte-buddy-agent:jar:1.10.19:test [INFO] | | \- org.objenesis:objenesis:jar:2.6:test [INFO] | +- org.skyscreamer:jsonassert:jar:1.5.0:test [INFO] | | \- com.vaadin.external.google:android-json:jar:0.0.20131108.vaadin1:test [INFO] | +- org.springframework:spring-core:jar:5.2.12.RELEASE:compile [INFO] | | \- org.springframework:spring-jcl:jar:5.2.12.RELEASE:compile [INFO] | +- org.springframework:spring-test:jar:5.2.12.RELEASE:test [INFO] | \- org.xmlunit:xmlunit-core:jar:2.6.4:test [INFO] +- com.aliyun:aliyun-java-sdk-core:jar:4.5.3:compile [INFO] | +- com.google.code.gson:gson:jar:2.8.6:compile [INFO] | +- org.apache.httpcomponents:httpclient:jar:4.5.13:compile [INFO] | | \- commons-codec:commons-codec:jar:1.13:compile [INFO] | +- org.apache.httpcomponents:httpcore:jar:4.4.14:compile [INFO] | +- commons-logging:commons-logging:jar:1.2:compile [INFO] | +- javax.xml.bind:jaxb-api:jar:2.3.1:compile [INFO] | | \- javax.activation:javax.activation-api:jar:1.2.0:compile [INFO] | +- org.jacoco:org.jacoco.agent:jar:runtime:0.8.5:compile [INFO] | +- org.ini4j:ini4j:jar:0.5.4:compile [INFO] | +- org.slf4j:slf4j-api:jar:1.7.30:compile [INFO] | +- io.opentracing:opentracing-api:jar:0.33.0:compile [INFO] | \- io.opentracing:opentracing-util:jar:0.33.0:compile [INFO] | \- io.opentracing:opentracing-noop:jar:0.33.0:compile [INFO] +- com.aliyun:dysmsapi20170525:jar:4.1.0:compile [INFO] | +- com.aliyun:tea-util:jar:0.2.23:compile [INFO] | +- com.aliyun:endpoint-util:jar:0.0.7:compile [INFO] | +- com.aliyun:tea:jar:1.3.1:compile [INFO] | | \- com.squareup.okhttp3:okhttp:jar:3.14.9:compile [INFO] | | \- com.squareup.okio:okio:jar:1.17.2:compile [INFO] | +- com.aliyun:tea-openapi:jar:0.3.8:compile [INFO] | | +- com.aliyun:credentials-java:jar:1.0.1:compile [INFO] | | | \- com.aliyun:credentials-api:jar:1.0.0:compile [INFO] | | +- com.aliyun:alibabacloud-gateway-spi:jar:0.0.2:compile [INFO] | | \- com.aliyun:tea-xml:jar:0.1.6:compile [INFO] | | \- org.dom4j:dom4j:jar:2.0.3:compile [INFO] | \- com.aliyun:openapiutil:jar:0.2.2:compile [INFO] | \- org.bouncycastle:bcprov-jdk18on:jar:1.78.1:compile [INFO] +- com.alibaba:fastjson:jar:1.2.75:compile [INFO] +- org.mybatis:mybatis:jar:3.5.9:compile [INFO] +- org.jetbrains:annotations:jar:13.0:compile [INFO] +- org.springframework.boot:spring-boot-configuration-processor:jar:2.2.13.RELEASE:compile (optional) [INFO] +- redis.clients:jedis:jar:3.1.0:compile [INFO] | \- org.apache.commons:commons-pool2:jar:2.7.0:compile [INFO] +- io.jsonwebtoken:jjwt-api:jar:0.11.5:compile [INFO] +- io.jsonwebtoken:jjwt-impl:jar:0.11.5:runtime [INFO] \- io.jsonwebtoken:jjwt-jackson:jar:0.11.5:runtime [INFO] \- com.fasterxml.jackson.core:jackson-databind:jar:2.10.5.1:compile [INFO] +- com.fasterxml.jackson.core:jackson-annotations:jar:2.10.5:compile [INFO] \- com.fasterxml.jackson.core:jackson-core:jar:2.10.5:compile [INFO] ------------------------------------------------------------------------ 2.applicaion.properties中的配置内容为logging.config=classpath:logback-spring.xml 3.src/main/resources目录下存在logback-spring.xml文件,但之前里面没有那两行<include>配置项,现已添加。
最新发布
07-19
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