私はこれを修正するために考えられるすべてのことを検索して試しましたが、TestServiceクラスのDaoは常にnullです。TestServiceクラスと同様にDaoが注入されていることを示すSpringログが表示されます。私は、Tomcatでまっすぐに実行するだけでなく、日食のためにWTPで実行してみました。どちらも同じエラーになります。TestServiceクラスでDaoがnullになるエラーの原因を解読するのを手伝ってください。
バージョン:
Jersey 1.8
Spring 3.0.5Release
Tomcat apache-tomcat-7.0.27
Maven 3.0.3 (r1075438; 2011-02-28 12:31:09-0500)
Java 1.6.0_31
Eclipse Java EE IDE for Web Developers.
Version: Indigo Service Release 2
Build id: 20120216-1857
ロギング-発生しているインジェクションを表示します(簡潔にするためにDEBUGとClassNamesを切り取ります)
Creating shared instance of singleton bean 'dataSource'
Creating instance of bean 'dataSource'
Eagerly caching bean 'dataSource' to allow for resolving potential circular references
Finished creating instance of bean 'dataSource'
Creating shared instance of singleton bean 'jdbcTemplate'
Creating instance of bean 'jdbcTemplate'
Eagerly caching bean 'jdbcTemplate' to allow for resolving potential circular references
Returning cached instance of singleton bean 'dataSource'
Invoking afterPropertiesSet() on bean with name 'jdbcTemplate'
Finished creating instance of bean 'jdbcTemplate'
Creating shared instance of singleton bean 'testClassDao'
Creating instance of bean 'testClassDao'
Found injected element on class [test.dao.TestClassDao]: AutowiredMethodElement for public void test.dao.TestClassDao.setDataSource(javax.sql.DataSource)
Eagerly caching bean 'testClassDao' to allow for resolving potential circular references
Processing injected method of bean 'testClassDao': AutowiredMethodElement for public void test.dao.TestClassDao.setDataSource(javax.sql.DataSource)
Returning cached instance of singleton bean 'dataSource'
Autowiring by type from bean name 'testClassDao' to bean named 'dataSource'
Finished creating instance of bean 'testClassDao'
Creating shared instance of singleton bean 'testService'
Creating instance of bean 'testService'
Found injected element on class [test.service.admin.TestService]: AutowiredFieldElement for test.dao.TestClassDao test.service.admin.TestService.dao
Eagerly caching bean 'testService' to allow for resolving potential circular references
Processing injected method of bean 'testService': AutowiredFieldElement for test.dao.TestClassDao test.service.admin.TestService.dao
Returning cached instance of singleton bean 'testClassDao'
Autowiring by type from bean name 'testService' to bean named 'testClassDao'
Finished creating instance of bean 'testService'
エラー-TestClassDaoがnullであるため、TestService.javaでNull Pointer Exception
Apr 25, 2012 9:07:04 PM org.apache.catalina.core.StandardWrapperValve invoke
SEVERE: Servlet.service() for servlet [jersey] in context with path [/test-service] threw exception
java.lang.NullPointerException
at test.service.admin.TestService.createCompanyProfile(TestService.java:35)
TestClassDao.java
package test.dao;
import javax.sql.DataSource;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.jdbc.core.namedparam.MapSqlParameterSource;
import org.springframework.jdbc.core.namedparam.NamedParameterJdbcTemplate;
import org.springframework.stereotype.Repository;
import test.domain.TestClass;
@Repository
public class TestClassDao {
private NamedParameterJdbcTemplate namedParamJdbcTemplate;
private DataSource dataSource;
@Autowired
public void setDataSource(DataSource dataSource) {
this.dataSource = dataSource;
this.namedParamJdbcTemplate = new NamedParameterJdbcTemplate(dataSource);
}
public void insertTestClass(TestClass testClass)
{
String query = "INSERT INTO TEST_CLASS_TABLE(NAME) VALUES (:NAME)";
MapSqlParameterSource namedParams = new MapSqlParameterSource();
mapParams(namedParams, testClass);
namedParamJdbcTemplate.update(query, namedParams);
}
private void mapParams(MapSqlParameterSource namedParams, TestClass testClass)
{
namedParams.addValue("NAME", testClass.getName());
}
}
TestClass.java
package test.domain;
import java.util.Date;
import java.util.HashSet;
import java.util.Set;
public class TestClass implements java.io.Serializable {
private String name;
public TestClass(String name){
this.name = name;
}
public String getName() {
return this.name;
}
}
TestService.java
package test.service.admin;
import javax.ws.rs.GET;
import javax.ws.rs.Path;
import javax.ws.rs.core.Context;
import javax.ws.rs.core.Request;
import javax.ws.rs.core.UriInfo;
import org.apache.log4j.Logger;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Component;
import test.dao.TestClassDao;
import test.domain.TestClass;
@Path("/resttest")
@Component
public class TestService {
@Context
UriInfo uriInfo;
@Context
Request request;
@Autowired
TestClassDao dao;
static Logger log = Logger.getLogger(TestService.class);
@GET
@Path("/test")
public String createCompanyProfile() {
TestClass test = new TestClass("MyTestName");
dao.insertTestClass(test);
return "test done";
}
}
applicationContext.xml
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:context="http://www.springframework.org/schema/context"
xsi:schemaLocation="http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans-3.0.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context-3.0.xsd">
<context:annotation-config />
<bean id="dataSource" class="org.apache.commons.dbcp.BasicDataSource">
<property name="driverClassName" value="com.mysql.jdbc.Driver" />
<property name="url" value="jdbc:mysql://localhost:1234/testClassDatabase" />
<property name="username" value="user" />
<property name="password" value="password" />
</bean>
<bean id="jdbcTemplate" class="org.springframework.jdbc.core.JdbcTemplate">
<property name="dataSource">
<ref bean="dataSource" />
</property>
</bean>
<context:component-scan base-package="test"/>
</beans>
web.xml
<!DOCTYPE web-app PUBLIC
"-//Sun Microsystems, Inc.//DTD Web Application 2.3//EN"
"http://java.sun.com/dtd/web-app_2_3.dtd" >
<web-app>
<context-param>
<param-name>contextConfigLocation</param-name>
<param-value>classpath:applicationContext.xml</param-value>
</context-param>
<listener>
<listener-class>org.springframework.web.util.Log4jConfigListener</listener-class>
</listener>
<listener>
<listener-class>
org.springframework.web.context.ContextLoaderListener
</listener-class>
</listener>
<servlet>
<servlet-name>jersey</servlet-name>
<servlet-class>
com.sun.jersey.spi.container.servlet.ServletContainer
</servlet-class>
<load-on-startup>1</load-on-startup>
</servlet>
<servlet-mapping>
<servlet-name>jersey</servlet-name>
<url-pattern>/*</url-pattern>
</servlet-mapping>
</web-app>
更新:これをWebアプリに追加しましたが、何も変更されませんでした
<web-app version="2.4" xmlns="http://java.sun.com/xml/ns/j2ee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd">
pom.xml-問題がどこにあるのか、依存関係か何かだと思います
<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>test-service</groupId>
<artifactId>test-service</artifactId>
<packaging>war</packaging>
<version>0.0.1-SNAPSHOT</version>
<name>Test Service</name>
<url>http://maven.apache.org</url>
<dependencies>
<!-- Jersey -->
<dependency>
<groupId>commons-dbcp</groupId>
<artifactId>commons-dbcp</artifactId>
<version>1.4</version>
</dependency>
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<version>5.1.19</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-jdbc</artifactId>
<version>${org.springframework.version}</version>
</dependency>
<dependency>
<groupId>com.sun.jersey</groupId>
<artifactId>jersey-server</artifactId>
<version>${jersey.version}</version>
</dependency>
<!-- Spring 3 dependencies -->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-core</artifactId>
<version>${org.springframework.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-context</artifactId>
<version>${org.springframework.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-web</artifactId>
<version>${org.springframework.version}</version>
</dependency>
<!-- Jersey + Spring -->
<dependency>
<groupId>com.sun.jersey.contribs</groupId>
<artifactId>jersey-spring</artifactId>
<version>${jersey.version}</version>
<exclusions>
<exclusion>
<groupId>org.springframework</groupId>
<artifactId>spring</artifactId>
</exclusion>
<exclusion>
<groupId>org.springframework</groupId>
<artifactId>spring-core</artifactId>
</exclusion>
<exclusion>
<groupId>org.springframework</groupId>
<artifactId>spring-web</artifactId>
</exclusion>
<exclusion>
<groupId>org.springframework</groupId>
<artifactId>spring-beans</artifactId>
</exclusion>
<exclusion>
<groupId>org.springframework</groupId>
<artifactId>spring-context</artifactId>
</exclusion>
</exclusions>
</dependency>
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>4.8.2</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>log4j</groupId>
<artifactId>log4j</artifactId>
<version>1.2.16</version>
</dependency>
</dependencies>
<build>
<finalName>test-service</finalName>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
<configuration>
<source>1.6</source>
<target>1.6</target>
</configuration>
</plugin>
</plugins>
</build>
<properties>
<org.springframework.version>3.0.5.RELEASE</org.springframework.version>
<jersey.version>1.8</jersey.version>
</properties>
</project>
更新の修正:友人が調べたところ、com.sun.jersey.config.property.packagesのパラメーターが設定されていないことに気付きました。これを追加すると、すべてが自動的に機能しました。
<?xml version="1.0" encoding="UTF-8"?>
<web-app version="2.4" xmlns="http://java.sun.com/xml/ns/j2ee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd">
<context-param>
<param-name>contextConfigLocation</param-name>
<param-value>classpath:server-context.xml</param-value>
</context-param>
<listener>
<listener-class>org.springframework.web.util.Log4jConfigListener</listener-class>
</listener>
<listener>
<listener-class>
org.springframework.web.context.ContextLoaderListener
</listener-class>
</listener>
<servlet>
<servlet-name>jersey-serlvet</servlet-name>
<servlet-class>
com.sun.jersey.spi.spring.container.servlet.SpringServlet
</servlet-class>
<init-param>
<param-name>
com.sun.jersey.config.property.packages
</param-name>
<param-value>service</param-value>
</init-param>
<load-on-startup>1</load-on-startup>
</servlet>
<servlet-mapping>
<servlet-name>jersey-serlvet</servlet-name>
<url-pattern>/*</url-pattern>
</servlet-mapping>
</web-app>