Problem with CORS in STS

[Alejandro Barrero]

STS cannot find the annotation @CrossOrigin in a Maven application; I have tried a few dependencies in the pom but to no avail. Now I am trying with code

public class WebMvcConfig extends WebMvcConfigurerAdapter {
 
    @Override
    public void addInterceptors(InterceptorRegistry registry) {
        registry.addInterceptor(new CorsInterceptor());
    }
}
public class CorsInterceptor extends HandlerInterceptorAdapter {
	 public static final String CREDENTIALS_NAME = "Access-Control-Allow-Credentials";
	 public static final String ORIGIN_NAME = "Access-Control-Allow-Origin";
	 public static final String METHODS_NAME = "Access-Control-Allow-Methods";
	 public static final String HEADERS_NAME = "Access-Control-Allow-Headers";
	 public static final String MAX_AGE_NAME = "Access-Control-Max-Age";

	 @Override
	 public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
	  response.setHeader(CREDENTIALS_NAME, "true");
	  response.setHeader(ORIGIN_NAME, "http://localhost:4200");
	  response.setHeader(METHODS_NAME, "GET, OPTIONS, POST, PUT, DELETE");
	  response.setHeader(HEADERS_NAME, "Origin, X-Requested-With, Content-Type, Accept");
	  response.setHeader(MAX_AGE_NAME, "3600");
	  return true;
	 }
}

but it still doesn't work.
Lately I added

    @Override
    public void addCorsMappings(CorsRegistry registry) {
      registry.addMapping("/**");
    }

But STS cannot find CorsRegistry.

[Stephan van Hulst]

Can you post your POM?

[Alejandro Barrero]

Thank you

<?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/maven-v4_0_0.xsd">
	<modelVersion>4.0.0</modelVersion>
	<groupId>com.journaldev</groupId>
	<artifactId>SpringRestExample</artifactId>
	<name>SpringRestExample</name>
	<packaging>war</packaging>
	<version>1.0.0-BUILD-SNAPSHOT</version>
	<properties>
		<java-version>1.6</java-version>
		<org.springframework-version>4.0.0.RELEASE</org.springframework-version>
		<org.aspectj-version>1.7.4</org.aspectj-version>
		<org.slf4j-version>1.7.5</org.slf4j-version>
		<jackson.databind-version>2.2.3</jackson.databind-version>
	</properties>
	<dependencies>
		<!-- Jackson -->
		<dependency>
			<groupId>com.fasterxml.jackson.core</groupId>
			<artifactId>jackson-databind</artifactId>
			<version>${jackson.databind-version}</version>
		</dependency>
		<!-- Spring -->
		<dependency>
			<groupId>org.springframework</groupId>
			<artifactId>spring-context</artifactId>
			<version>${org.springframework-version}</version>
			<exclusions>
				<!-- Exclude Commons Logging in favor of SLF4j -->
				<exclusion>
					<groupId>commons-logging</groupId>
					<artifactId>commons-logging</artifactId>
				</exclusion>
			</exclusions>
		</dependency>
		<dependency>
			<groupId>org.springframework</groupId>
			<artifactId>spring-webmvc</artifactId>
			<version>${org.springframework-version}</version>
		</dependency>
		<dependency>
			<groupId>org.springframework</groupId>
			<artifactId>spring-web</artifactId>
			<version>4.1.4.RELEASE</version>
		</dependency>

		<dependency>
			<groupId>org.springframework</groupId>
			<artifactId>spring-core</artifactId>
			<version>4.1.4.RELEASE</version>
		</dependency>
		<!-- AspectJ -->
		<dependency>
			<groupId>org.aspectj</groupId>
			<artifactId>aspectjrt</artifactId>
			<version>${org.aspectj-version}</version>
		</dependency>

		<!-- Logging -->
		<dependency>
			<groupId>org.slf4j</groupId>
			<artifactId>slf4j-api</artifactId>
			<version>${org.slf4j-version}</version>
		</dependency>
		<dependency>
			<groupId>org.slf4j</groupId>
			<artifactId>jcl-over-slf4j</artifactId>
			<version>${org.slf4j-version}</version>
			<scope>runtime</scope>
		</dependency>
		<dependency>
			<groupId>org.slf4j</groupId>
			<artifactId>slf4j-log4j12</artifactId>
			<version>${org.slf4j-version}</version>
			<scope>runtime</scope>
		</dependency>
		<dependency>
			<groupId>log4j</groupId>
			<artifactId>log4j</artifactId>
			<version>1.2.15</version>
			<exclusions>
				<exclusion>
					<groupId>javax.mail</groupId>
					<artifactId>mail</artifactId>
				</exclusion>
				<exclusion>
					<groupId>javax.jms</groupId>
					<artifactId>jms</artifactId>
				</exclusion>
				<exclusion>
					<groupId>com.sun.jdmk</groupId>
					<artifactId>jmxtools</artifactId>
				</exclusion>
				<exclusion>
					<groupId>com.sun.jmx</groupId>
					<artifactId>jmxri</artifactId>
				</exclusion>
			</exclusions>
			<scope>runtime</scope>
		</dependency>

		<!-- @Inject -->
		<dependency>
			<groupId>javax.inject</groupId>
			<artifactId>javax.inject</artifactId>
			<version>1</version>
		</dependency>

		<!-- Servlet -->
		<dependency>
			<groupId>javax.servlet</groupId>
			<artifactId>servlet-api</artifactId>
			<version>2.5</version>
			<scope>provided</scope>
		</dependency>
		<dependency>
			<groupId>javax.servlet.jsp</groupId>
			<artifactId>jsp-api</artifactId>
			<version>2.1</version>
			<scope>provided</scope>
		</dependency>
		<dependency>
			<groupId>javax.servlet</groupId>
			<artifactId>jstl</artifactId>
			<version>1.2</version>
		</dependency>

		<!-- Test -->
		<dependency>
			<groupId>junit</groupId>
			<artifactId>junit</artifactId>
			<version>4.7</version>
			<scope>test</scope>
		</dependency>

	</dependencies>
	<build>
		<plugins>
			<plugin>
				<artifactId>maven-eclipse-plugin</artifactId>
				<version>2.9</version>
				<configuration>
					<additionalProjectnatures>
						<projectnature>org.springframework.ide.eclipse.core.springnature</projectnature>
					</additionalProjectnatures>
					<additionalBuildcommands>
						<buildcommand>org.springframework.ide.eclipse.core.springbuilder</buildcommand>
					</additionalBuildcommands>
					<downloadSources>true</downloadSources>
					<downloadJavadocs>true</downloadJavadocs>
				</configuration>
			</plugin>
			<plugin>
				<groupId>org.apache.maven.plugins</groupId>
				<artifactId>maven-compiler-plugin</artifactId>
				<version>2.5.1</version>
				<configuration>
					<source>1.6</source>
					<target>1.6</target>
					<compilerArgument>-Xlint:all</compilerArgument>
					<showWarnings>true</showWarnings>
					<showDeprecation>true</showDeprecation>
				</configuration>
			</plugin>
			<plugin>
				<groupId>org.codehaus.mojo</groupId>
				<artifactId>exec-maven-plugin</artifactId>
				<version>1.2.1</version>
				<configuration>
					<mainClass>org.test.int1.Main</mainClass>
				</configuration>
			</plugin>
		</plugins>

	</build>
</project>

[Stephan van Hulst]

I will check it now. I'll respond to you later today.

[Stephan van Hulst]

Sorry for the late reply.

Remove the spring-core and spring-web and spring-context dependencies from your POM and upgrade the version of <org.springframework-version> to something like 4.3.10.RELEASE.

Add the following underneath your <dependencies> node:
 <dependencyManagement>    <dependencies>      <dependency>        <groupId>org.springframework</groupId>        <artifactId>spring-context</artifactId>        <exclusions>          <!-- Exclude Commons Logging in favor of SLF4j -->          <exclusion>            <groupId>commons-logging</groupId>            <artifactId>commons-logging</artifactId>          </exclusion>        </exclusions>      </dependency>    </dependencies>  </dependencyManagement>
Putting spring-context under dependencyManagement means: "I don't directly depend on spring-context, but if one of my direct dependencies does, make sure to exclude commons-logging".

You should try to make your dependency graph a tree as much as possible. I removed spring-core, spring-web and spring-context because they are already transitive dependencies from spring-webmvc, and they're causing version conflicts.

You should also move log4j under dependency management, and remove the <version> element.

[Stephan van Hulst]

I made a clean POM for you:
<?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/maven-v4_0_0.xsd" >  <modelVersion>4.0.0</modelVersion>    <groupId>com.journaldev</groupId>  <artifactId>SpringRestExample</artifactId>  <version>1.0.0-BUILD-SNAPSHOT</version>  <packaging>war</packaging>  <name>SpringRestExample</name>    <properties>    <java-version>1.6</java-version>    <org.springframework-version>4.3.10.RELEASE</org.springframework-version>    <org.slf4j-version>1.7.25</org.slf4j-version>  </properties>    <dependencies>    <!-- Java EE 7 -->    <dependency>      <groupId>javax</groupId>      <artifactId>javaee-web-api</artifactId>      <version>7.0</version>      <scope>provided</scope>    </dependency>    <!-- Spring -->    <dependency>      <groupId>org.springframework</groupId>      <artifactId>spring-webmvc</artifactId>      <version>${org.springframework-version}</version>    </dependency>        <!-- Jackson -->    <dependency>      <groupId>com.fasterxml.jackson.core</groupId>      <artifactId>jackson-databind</artifactId>      <version>2.9.0</version>    </dependency>        <!-- AspectJ -->    <dependency>      <groupId>org.aspectj</groupId>      <artifactId>aspectjrt</artifactId>      <version>1.8.10</version>    </dependency>    <!-- Logging -->    <dependency>      <groupId>org.slf4j</groupId>      <artifactId>slf4j-api</artifactId>      <version>${org.slf4j-version}</version>    </dependency>    <dependency>      <groupId>org.slf4j</groupId>      <artifactId>jcl-over-slf4j</artifactId>      <version>${org.slf4j-version}</version>      <scope>runtime</scope>    </dependency>    <dependency>      <groupId>org.slf4j</groupId>      <artifactId>slf4j-log4j12</artifactId>      <version>${org.slf4j-version}</version>      <scope>runtime</scope>    </dependency>    <!-- Test -->    <dependency>      <groupId>junit</groupId>      <artifactId>junit</artifactId>      <version>4.12</version>      <scope>test</scope>    </dependency>  </dependencies>    <dependencyManagement>    <dependencies>      <dependency>        <groupId>org.springframework</groupId>        <artifactId>spring-core</artifactId>        <version>${org.springframework-version}</version>        <exclusions>          <!-- Exclude Commons Logging in favor of SLF4j -->          <exclusion>            <groupId>commons-logging</groupId>            <artifactId>commons-logging</artifactId>          </exclusion>        </exclusions>      </dependency>    </dependencies>  </dependencyManagement>  <build>    <plugins>      <plugin>        <artifactId>maven-eclipse-plugin</artifactId>        <version>2.10</version>        <configuration>          <additionalProjectnatures>            <projectnature>org.springframework.ide.eclipse.core.springnature</projectnature>          </additionalProjectnatures>          <additionalBuildcommands>            <buildcommand>org.springframework.ide.eclipse.core.springbuilder</buildcommand>          </additionalBuildcommands>          <downloadSources>true</downloadSources>          <downloadJavadocs>true</downloadJavadocs>        </configuration>      </plugin>      <plugin>        <groupId>org.apache.maven.plugins</groupId>        <artifactId>maven-compiler-plugin</artifactId>        <version>3.6.2</version>        <configuration>          <source>${java-version}</source>          <target>${java-version}</target>          <compilerArgument>-Xlint:all</compilerArgument>          <showWarnings>true</showWarnings>          <showDeprecation>true</showDeprecation>        </configuration>      </plugin>      <plugin>        <groupId>org.codehaus.mojo</groupId>        <artifactId>exec-maven-plugin</artifactId>        <version>1.6.0</version>        <configuration>          <mainClass>org.test.int1.Main</mainClass>        </configuration>      </plugin>    </plugins>  </build> </project>

[Tim Moores]

A couple of cows to Stephan for the effort he put into these answers!