我有一个LoginServlet.java:
public class LoginServlet extends HttpServlet {
public void doGet(HttpServletRequest request, HttpServletResponse response) throws IOException, ServletException {
response.getWriter().println("HELLO THERE");
}
和web.xml中的这段代码(以及其他内容):
<servlet-mapping>
<servlet-name>LoginServlet</servlet-name>
<url-pattern>/LoginResult.do</url-pattern>
</servlet-mapping>
<servlet>
<servlet-name>LoginServlet</servlet-name>
<servlet-class>com.web.LoginServlet</servlet-class>
</servlet>
我尝试去URL:http://localhost:8080/ProjectName/LoginResult.do
并得到HTTP Status 404 – Not Found
错误。
为什么?看起来Tomcat无法找到servlet,否则它将能够输出文本,因为它相当容易。
我的项目结构:
ProjectName
-----------index.jsp
-----------pom.xml
-----------src
--------------main
------------------java
----------------------com
-------------------------web
---------------------------------LoginServlet.java
------------------webapp
------------------------WEB-INF
-------------------------------classes
--------------------------------------com
------------------------------------------web
---------------------------------------------LoginServlet.class
编辑:我想出了各种解决方案:如果我将WEB-INF
文件夹及其所有内容放入root ProjectName
,它工作正常,我可以访问servlet。但是,我在教程中推荐了这个(就像我的问题一样)项目结构。当WEB-INF
位于src/main/webapp
内时,如何使其与项目结构一起使用?我稍微使用了Maven(下载依赖项并指定目标输出目录)。我是否需要在pom.xml
中进行一些更改才能使其正常工作?
编辑2:这是我的pom.xml
:
<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>com.util</groupId>
<artifactId>testproject</artifactId>
<packaging>war</packaging>
<version>1.0-SNAPSHOT</version>
<name>Test Project</name>
<url>https://test.com</url>
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>1.4.2.RELEASE</version>
</parent>
<dependencies>
<!-- https://mvnrepository.com/artifact/org.apache.tomcat/tomcat-util -->
<dependency>
<groupId>org.apache.tomcat</groupId>
<artifactId>tomcat-util</artifactId>
<version>8.0.0-RC1</version>
</dependency>
<!-- https://mvnrepository.com/artifact/org.json/json -->
<dependency>
<groupId>org.json</groupId>
<artifactId>json</artifactId>
<version>20180813</version>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-thymeleaf</artifactId>
<version>2.1.3.RELEASE</version>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-devtools</artifactId>
<version>1.3.0.RELEASE</version>
<optional>true</optional>
</dependency>
<dependency>
<groupId>javax.servlet</groupId>
<artifactId>javax.servlet-api</artifactId>
<version>3.0.1</version>
<scope>provided</scope>
</dependency>
<dependency>
<groupId>org.apache.httpcomponents</groupId>
<artifactId>httpclient</artifactId>
<version>4.5.2</version>
</dependency>
<!--Using logback-->
<dependency>
<groupId>commons-logging</groupId>
<artifactId>commons-logging</artifactId>
<version>1.2</version>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-logging</artifactId>
<version>2.1.3.RELEASE</version>
</dependency>
<!-- https://mvnrepository.com/artifact/org.apache.maven.plugins/maven-enforcer-plugin -->
<dependency>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-enforcer-plugin</artifactId>
<version>3.0.0-M2</version>
</dependency>
<!-- https://mvnrepository.com/artifact/log4j/log4j -->
<dependency>
<groupId>log4j</groupId>
<artifactId>log4j</artifactId>
<version>1.2.17</version>
</dependency>
</dependencies>
<properties>
<java.version>1.7</java.version>
<start-class>com.web.LoginServlet</start-class>
</properties>
<build>
<outputDirectory>${basedir}\src\main\webapp\WEB-INF\classes</outputDirectory>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-dependency-plugin</artifactId>
<version>2.3</version>
<executions>
<execution>
<phase>package</phase>
<goals><goal>copy</goal></goals>
<configuration>
<artifactItems>
<artifactItem>
<groupId>com.github.jsimone</groupId>
<artifactId>webapp-runner</artifactId>
<version>8.0.30.2</version>
<destFileName>webapp-runner.jar</destFileName>
</artifactItem>
</artifactItems>
</configuration>
</execution>
</executions>
</plugin>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-war-plugin</artifactId>
<version>3.2.2</version>
</plugin>
<!-- https://mvnrepository.com/artifact/org.apache.maven.plugins/maven-compiler-plugin -->
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
<version>3.8.0</version>
<configuration>
<source>1.7</source>
<target>1.7</target>
</configuration>
</plugin>
</plugins>
<defaultGoal>install</defaultGoal>
</build>
</project>
当我运行mvn package
时,它会在testproject-1.0-SNAPSHOT.war
中创建一个testproject-1.0-SNAPSHOT.war.original
和root/target
。但是当我去http://localhost:8080/ProjectName/LoginResult.do
时它仍然是404
错误。
我尝试将qazxsw poi和qazxsw poi放在qazxsw poi中 - 没有用,仍然testproject-1.0-SNAPSHOT.war
错误,然后我尝试把它放入testproject-1.0-SNAPSHOT.war.original
- 仍然root
。
您遇到的问题与错误放置的资源无关。我刚刚创建了一个与你的结构相同的Maven项目,一切正常。你唯一错误的是你使用URI:
404
如上所述,生成的war文件名为testproject-1.0-SNAPSHOT.war。因此,如果您将此文件放在Tomcat的webapps文件夹中,那么您的正确URL应为:
Tomcat 8.5/webapps
如果您想使用您的网址,则应按如下方式调整您的POM:
404
当您使用Maven构建时,这将生成Projectname.war,部署后您可以使用:
http://localhost:8080/ProjectName/LoginResult.do
最后,您不需要在POM中使用以下行并将其删除(我不确定您是否要将生成的工件放在源树下!):
http://localhost:8080/testproject-1.0-SNAPSHOT/LoginResult.do