Question

我是Spring Boot的新手。

我正在尝试编写一个rest api，它应该从数据库中获取数据并将其显示给使用者。我不知道如何解决这个问题。

请帮助在Liberty Server上使用JDBC数据源运行应用程序。简单的弹簧靴休息服务非常好。

如果有太多问题，请原谅我。我想学习这个。

这是我的pom文件：

<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.ankit.demo</groupId>
<artifactId>test-demo</artifactId>
<version>0.0.1-SNAPSHOT</version>
<packaging>war</packaging>

<name>test-demo</name>
<url>http://maven.apache.org</url>

<parent>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-parent</artifactId>
    <version>2.0.1.RELEASE</version>
    <relativePath /> <!-- lookup parent from repository -->
</parent>

<properties>
    <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
</properties>

<dependencies>
    <dependency>
        <groupId>junit</groupId>
        <artifactId>junit</artifactId>
    </dependency>
    <dependency>
        <groupId>com.oracle</groupId>
        <artifactId>ojdbc6</artifactId>
        <version>11.2.0.3</version>
    </dependency>
    <dependency>
        <groupId>javax.servlet</groupId>
        <artifactId>javax.servlet-api</artifactId>
    </dependency>
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-web</artifactId>
        <exclusions>
            <exclusion>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-starter-tomcat</artifactId>
            </exclusion>
        </exclusions>
    </dependency>
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-actuator</artifactId>
    </dependency>
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-jdbc</artifactId>
    </dependency>
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-data-jpa</artifactId>
    </dependency>
</dependencies>
<build>
    <plugins>
        <plugin>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-maven-plugin</artifactId>
            <executions>
                <execution>
                    <goals>
                        <goal>repackage</goal>
                    </goals>
                    <configuration>
                        <skip>true</skip>
                    </configuration>
                </execution>
            </executions>
        </plugin>

        <plugin>
            <artifactId>maven-resources-plugin</artifactId>
        </plugin>
        <plugin>
            <groupId>org.apache.maven.plugins</groupId>
            <artifactId>maven-compiler-plugin</artifactId>
            <configuration>
                <source>1.8</source>
                <target>1.8</target>
            </configuration>
        </plugin>
    </plugins>
</build>

DemoService.java

package com.ankit.demo;

import org.springframework.boot.autoconfigure.EnableAutoConfiguration;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.boot.autoconfigure.context.MessageSourceAutoConfiguration;
import org.springframework.boot.autoconfigure.data.jpa.JpaRepositoriesAutoConfiguration;
import org.springframework.boot.autoconfigure.orm.jpa.HibernateJpaAutoConfiguration;
import org.springframework.boot.builder.SpringApplicationBuilder;
import org.springframework.boot.web.servlet.support.SpringBootServletInitializer;
import org.springframework.context.annotation.ComponentScan;
import org.springframework.context.annotation.Configuration;

@Configuration
@ComponentScan(basePackages = { "com.ankit.demo.*" })
@SpringBootApplication(exclude = MessageSourceAutoConfiguration.class)
@EnableAutoConfiguration(exclude = { HibernateJpaAutoConfiguration.class,   JpaRepositoriesAutoConfiguration.class })
public class DemoService extends SpringBootServletInitializer {

    @Override
    protected SpringApplicationBuilder configure(SpringApplicationBuilder  application) {
        return application.sources(DemoService.class);
    }
}

OracleDatabaseConfiguration.java

package com.ankit.demo.configuration;

import javax.sql.DataSource;

import org.springframework.beans.factory.annotation.Qualifier;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.jdbc.core.JdbcTemplate;
import org.springframework.jdbc.datasource.lookup.JndiDataSourceLookup;

@Configuration
public class OracleDatabaseConfiguration {

    @Value("${spring.Oracle.datasource.jndi-name}")
    private String jndiName;

    @Bean(destroyMethod = "")
    public DataSource OracleDataSource() {
        JndiDataSourceLookup dataSourceLookup = new JndiDataSourceLookup();
        return dataSourceLookup.getDataSource(jndiName);
    }

    @Bean()
    @Qualifier("oracleJdbcTemplate")
    public JdbcTemplate jdbcTemplate() {
        return new JdbcTemplate(OracleDataSource());
    }
}

DemoController.java

package com.ankit.demo.controller;

import java.util.List;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.RestController;

import com.ankit.demo.source.IDemoService;
import com.ankit.demo.vo.Employee;

 @RestController
 public class DemoController {

    @Autowired
    private IDemoService iDemoService;

    @RequestMapping(method=RequestMethod.GET, value="/getEmployee")

    public List<Employee> getEmployee() {
        return iDemoService.getEmployee();
    }
}

DemoDAOImpl.java

package com.ankit.demo.respository;

import java.util.List;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Qualifier;
import org.springframework.jdbc.core.JdbcTemplate;
import org.springframework.stereotype.Component;

import com.ankit.demo.rowmapper.EmployeeMapper;
import com.ankit.demo.source.IDemoDAO;
import com.ankit.demo.vo.Employee;

@Component
public class DemoDAOImpl implements IDemoDAO {

    @Autowired
    @Qualifier("oracleJdbcTemplate")
    private JdbcTemplate jdbcTemplate;

    @SuppressWarnings({ "unchecked", "rawtypes" })
    @Override
    public List<Employee> getEmployee() {
        String sql = "SELECT * FROM EMPLOYEE";
        List<Employee> empLst = null;
        try {
            empLst = jdbcTemplate.query(sql, new EmployeeMapper());
        }catch(Exception ex) {

        }
        return empLst;
    }

}

EmployeeMapper.java

package com.ankit.demo.rowmapper;

import java.sql.ResultSet;
import java.sql.SQLException;

import org.springframework.jdbc.core.RowMapper;

import com.ankit.demo.vo.Employee;

public class EmployeeMapper<T> implements RowMapper<Employee>{

    @Override
    public Employee mapRow(ResultSet rs, int rowNum) throws SQLException   {

        Employee emp = new Employee();
        try {
            if(rs != null) {
                if(rs.next()) {
                   emp.setEmpId(rs.getLong("EMP_ID"));
                   emp.setEmpName(rs.getString("EMP_NAME"));
                   emp.setAccName(rs.getNString("ACCOUNT_NAME"));
                   emp.setJoinDate(rs.getDate("JOINING_DATE"));
                }
            }else {
                System.out.println("Result Set is null");
            }
        }catch(Exception ex) {
            ex.printStackTrace();
        }finally {
            if(rs != null) {
                rs.close();
            }
        }
        return emp;
    }

}

DemoServiceImpl.java

package com.ankit.demo.service;

import java.util.List;

import org.springframework.beans.factory.annotation.Autowired;

import com.ankit.demo.source.IDemoDAO;
import com.ankit.demo.source.IDemoService;
import com.ankit.demo.vo.Employee;

public class DemoServiceImpl implements IDemoService {

    @Autowired
    private IDemoDAO iDemoDAO;

    @Override
    public List<Employee> getEmployee() {
        return iDemoDAO.getEmployee();
    }

}

Employee.java

package com.ankit.demo.vo;

import java.util.Date;

public class Employee {

    private long empId;
    private String empName;
    private String accName;
    private Date joinDate;

    public long getEmpId() {
        return empId;
    }
    public void setEmpId(long empId) {
        this.empId = empId;
    }
    public String getEmpName() {
        return empName;
    }
    public void setEmpName(String empName) {
        this.empName = empName;
    }
    public String getAccName() {
        return accName;
    }
    public void setAccName(String accName) {
        this.accName = accName;
    }
    public Date getJoinDate() {
        return joinDate;
    }
    public void setJoinDate(Date joinDate) {
        this.joinDate = joinDate;
    }

    @Override
    public String toString() {
        return "Employee [empId=" + empId + ", empName=" + empName + ",  accName=" + accName + ", joinDate=" + joinDate
            + "]";
    }
}

server.xml中

<server description="new server">

<!-- Enable features -->
<featureManager>
    <feature>webProfile-7.0</feature>
    <feature>localConnector-1.0</feature>
    <feature>jaxb-2.2</feature>
</featureManager>

<!-- To access this server from a remote client add a host attribute to 
    the following element, e.g. host="*" -->
<httpEndpoint httpPort="9080" httpsPort="9443"
    id="defaultHttpEndpoint" />

<!-- Automatically expand WAR files and EAR files -->
<applicationManager autoExpand="true" />
<applicationMonitor updateTrigger="mbean" />

<!-- WEB APPLICATION -->
<webApplication id="test-demo" location="test-demo.war" name="test-demo" />

<!-- ORACLE DATASOURCE -->
<dataSource id="DefaultDataSource" jndiName="jdbc/oracle" connectionSharing="MatchOriginalRequest" isolationLevel="TRANSACTION_READ_UNCOMMITTED" statementCacheSize="20">
    <connectionManager maxPoolSize="20" minPoolSize="5" connectionTimeout="30s" agedTimeout="30m"></connectionManager>
    <jdbcDriver libraryRef="OracleLib" />
    <properties.oracle URL="jdbc:oracle:thin:@//localhost:1521/xe" user="system" password="{xor}PjsyNjE=" />
</dataSource>

<!-- ORACLE JDBC DRIVER LIBRARY -->
<library id="OracleLib">
    <file name="E:/LocalRepository/.m2/repository/com/oracle/ojdbc6/11.2.0.3/ojdbc6.jar" />
</library>
</server>

输出控制台

[AUDIT   ] CWWKT0016I: Web application available (default_host):  http://localhost:9080/test-demo/
[AUDIT   ] CWWKZ0003I: The application test-demo updated in 8.963 seconds.
[WARNING ] CWNEN0047W: Resource annotations on the fields of the org.springframework.web.servlet.view.tiles3.TilesConfigurer$CompositeELResolverImpl class will be ignored. The annotations could not be obtained because of the exception : java.lang.NoClassDefFoundError: org/apache/tiles/el/ScopeELResolver
[WARNING ] CWNEN0049W: Resource annotations on the methods of the org.springframework.web.servlet.view.tiles3.TilesConfigurer$CompositeELResolverImpl class will be ignored. The annotations could not be obtained because of the exception : java.lang.NoClassDefFoundError: org/apache/tiles/el/ScopeELResolver
[WARNING ] SRVE0190E: File not found: /getEmployee

我将spring-boot-starter-parent版本更改为1.3.3并获得以下异常

java.lang.IllegalStateException: Could not evaluate condition on org.springframework.boot.autoconfigure.PropertyPlaceholderAutoConfiguration#propertySourcesPlaceholderConfigurer due to org/springframework/jdbc/core/JdbcTemplate not found. Make sure your own configuration does not rely on that class. This can also happen if you are @ComponentScanning a springframework package (e.g. if you put a @ComponentScan in the default package by mistake)
at org.springframework.boot.autoconfigure.condition.SpringBootCondition.matches(SpringBootCondition.java:55) ~[spring-boot-autoconfigure-1.3.3.RELEASE.jar:1.3.3.RELEASE]
at org.springframework.context.annotation.ConditionEvaluator.shouldSkip(ConditionEvaluator.java:102) ~[spring-context-4.2.5.RELEASE.jar:4.2.5.RELEASE]
at org.springframework.context.annotation.ConfigurationClassBeanDefinitionReader.loadBeanDefinitionsForBeanMethod(ConfigurationClassBeanDefinitionReader.java:178) ~[spring-context-4.2.5.RELEASE.jar:4.2.5.RELEASE]
at org.springframework.context.annotation.ConfigurationClassBeanDefinitionReader.loadBeanDefinitionsForConfigurationClass(ConfigurationClassBeanDefinitionReader.java:140) ~[spring-context-4.2.5.RELEASE.jar:4.2.5.RELEASE]
at org.springframework.context.annotation.ConfigurationClassBeanDefinitionReader.loadBeanDefinitions(ConfigurationClassBeanDefinitionReader.java:116) ~[spring-context-4.2.5.RELEASE.jar:4.2.5.RELEASE]
at org.springframework.context.annotation.ConfigurationClassPostProcessor.processConfigBeanDefinitions(ConfigurationClassPostProcessor.java:333) ~[spring-context-4.2.5.RELEASE.jar:4.2.5.RELEASE]
at org.springframework.context.annotation.ConfigurationClassPostProcessor.postProcessBeanDefinitionRegistry(ConfigurationClassPostProcessor.java:243) ~[spring-context-4.2.5.RELEASE.jar:4.2.5.RELEASE]
at org.springframework.context.support.PostProcessorRegistrationDelegate.invokeBeanDefinitionRegistryPostProcessors(PostProcessorRegistrationDelegate.java:273) ~[spring-context-4.2.5.RELEASE.jar:4.2.5.RELEASE]
at org.springframework.context.support.PostProcessorRegistrationDelegate.invokeBeanFactoryPostProcessors(PostProcessorRegistrationDelegate.java:98) ~[spring-context-4.2.5.RELEASE.jar:4.2.5.RELEASE]
at org.springframework.context.support.AbstractApplicationContext.invokeBeanFactoryPostProcessors(AbstractApplicationContext.java:678) ~[spring-context-4.2.5.RELEASE.jar:4.2.5.RELEASE]
at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:520) ~[spring-context-4.2.5.RELEASE.jar:4.2.5.RELEASE]
at org.springframework.boot.context.embedded.EmbeddedWebApplicationContext.refresh(EmbeddedWebApplicationContext.java:118) ~[spring-boot-1.3.3.RELEASE.jar:1.3.3.RELEASE]
at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:766) ~[spring-boot-1.3.3.RELEASE.jar:1.3.3.RELEASE]
at org.springframework.boot.SpringApplication.createAndRefreshContext(SpringApplication.java:361) ~[spring-boot-1.3.3.RELEASE.jar:1.3.3.RELEASE]
at org.springframework.boot.SpringApplication.run(SpringApplication.java:307) ~[spring-boot-1.3.3.RELEASE.jar:1.3.3.RELEASE]
at org.springframework.boot.context.web.SpringBootServletInitializer.run(SpringBootServletInitializer.java:149) [spring-boot-1.3.3.RELEASE.jar:1.3.3.RELEASE]
at org.springframework.boot.context.web.SpringBootServletInitializer.createRootApplicationContext(SpringBootServletInitializer.java:129) [spring-boot-1.3.3.RELEASE.jar:1.3.3.RELEASE]
at org.springframework.boot.context.web.SpringBootServletInitializer.onStartup(SpringBootServletInitializer.java:85) [spring-boot-1.3.3.RELEASE.jar:1.3.3.RELEASE]
at org.springframework.web.SpringServletContainerInitializer.onStartup(SpringServletContainerInitializer.java:175) [spring-web-4.2.5.RELEASE.jar:4.2.5.RELEASE]
at com.ibm.ws.webcontainer.webapp.WebApp.initializeServletContainerInitializers(WebApp.java:2490) [com.ibm.ws.webcontainer_1.1.18.jar:na]
at com.ibm.ws.webcontainer.webapp.WebApp.initialize(WebApp.java:1002) [com.ibm.ws.webcontainer_1.1.18.jar:na]
at com.ibm.ws.webcontainer.webapp.WebApp.initialize(WebApp.java:6550) [com.ibm.ws.webcontainer_1.1.18.jar:na]
at com.ibm.ws.webcontainer.osgi.DynamicVirtualHost.startWebApp(DynamicVirtualHost.java:469) [com.ibm.ws.webcontainer_1.1.18.jar:na]
at com.ibm.ws.webcontainer.osgi.DynamicVirtualHost.startWebApplication(DynamicVirtualHost.java:464) [com.ibm.ws.webcontainer_1.1.18.jar:na]
at com.ibm.ws.webcontainer.osgi.WebContainer.startWebApplication(WebContainer.java:1119) [com.ibm.ws.webcontainer_1.1.18.jar:na]
at com.ibm.ws.webcontainer.osgi.WebContainer.access$000(WebContainer.java:103) [com.ibm.ws.webcontainer_1.1.18.jar:na]
at com.ibm.ws.webcontainer.osgi.WebContainer$2.run(WebContainer.java:931) [com.ibm.ws.webcontainer_1.1.18.jar:na]
at java.util.concurrent.Executors$RunnableAdapter.call(Unknown Source) [na:1.8.0_151]
at java.util.concurrent.FutureTask.run(Unknown Source) [na:1.8.0_151]
at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source) [na:1.8.0_151]
at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)  [na:1.8.0_151]
at java.lang.Thread.run(Unknown Source) [na:1.8.0_151]
Caused by: java.lang.NoClassDefFoundError: org/springframework/jdbc/core/JdbcTemplate
at java.lang.Class.getDeclaredMethods0(Native Method) ~[na:1.8.0_151]
at java.lang.Class.privateGetDeclaredMethods(Unknown Source) ~[na:1.8.0_151]
at java.lang.Class.getDeclaredMethods(Unknown Source) ~[na:1.8.0_151]
at org.springframework.util.ReflectionUtils.getDeclaredMethods(ReflectionUtils.java:609) ~[spring-core-4.2.5.RELEASE.jar:4.2.5.RELEASE]
at org.springframework.util.ReflectionUtils.doWithMethods(ReflectionUtils.java:521) ~[spring-core-4.2.5.RELEASE.jar:4.2.5.RELEASE]
at org.springframework.util.ReflectionUtils.doWithMethods(ReflectionUtils.java:507) ~[spring-core-4.2.5.RELEASE.jar:4.2.5.RELEASE]
at org.springframework.util.ReflectionUtils.getUniqueDeclaredMethods(ReflectionUtils.java:567) ~[spring-core-4.2.5.RELEASE.jar:4.2.5.RELEASE]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.getTypeForFactoryMethod(AbstractAutowireCapableBeanFactory.java:683) ~[spring-beans-4.2.5.RELEASE.jar:4.2.5.RELEASE]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.determineTargetType(AbstractAutowireCapableBeanFactory.java:627) ~[spring-beans-4.2.5.RELEASE.jar:4.2.5.RELEASE]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.predictBeanType(AbstractAutowireCapableBeanFactory.java:597) ~[spring-beans-4.2.5.RELEASE.jar:4.2.5.RELEASE]
at org.springframework.beans.factory.support.AbstractBeanFactory.isFactoryBean(AbstractBeanFactory.java:1445) ~[spring-beans-4.2.5.RELEASE.jar:4.2.5.RELEASE]
at org.springframework.beans.factory.support.AbstractBeanFactory.isFactoryBean(AbstractBeanFactory.java:975) ~[spring-beans-4.2.5.RELEASE.jar:4.2.5.RELEASE]
at org.springframework.boot.autoconfigure.condition.BeanTypeRegistry$OptimizedBeanTypeRegistry.addBeanTypeForNonAliasDefinition(BeanTypeRegistry.java:289) ~[spring-boot-autoconfigure-1.3.3.RELEASE.jar:1.3.3.RELEASE]
at org.springframework.boot.autoconfigure.condition.BeanTypeRegistry$OptimizedBeanTypeRegistry.addBeanType(BeanTypeRegistry.java:278) ~[spring-boot-autoconfigure-1.3.3.RELEASE.jar:1.3.3.RELEASE]
at org.springframework.boot.autoconfigure.condition.BeanTypeRegistry$OptimizedBeanTypeRegistry.getNamesForType(BeanTypeRegistry.java:259) ~[spring-boot-autoconfigure-1.3.3.RELEASE.jar:1.3.3.RELEASE]
at org.springframework.boot.autoconfigure.condition.OnBeanCondition.collectBeanNamesForType(OnBeanCondition.java:182) ~[spring-boot-autoconfigure-1.3.3.RELEASE.jar:1.3.3.RELEASE]
at org.springframework.boot.autoconfigure.condition.OnBeanCondition.getBeanNamesForType(OnBeanCondition.java:171) ~[spring-boot-autoconfigure-1.3.3.RELEASE.jar:1.3.3.RELEASE]
at org.springframework.boot.autoconfigure.condition.OnBeanCondition.getMatchingBeans(OnBeanCondition.java:139) ~[spring-boot-autoconfigure-1.3.3.RELEASE.jar:1.3.3.RELEASE]
at org.springframework.boot.autoconfigure.condition.OnBeanCondition.getMatchOutcome(OnBeanCondition.java:113) ~[spring-boot-autoconfigure-1.3.3.RELEASE.jar:1.3.3.RELEASE]
at org.springframework.boot.autoconfigure.condition.SpringBootCondition.matches(SpringBootCondition.java:47) ~[spring-boot-autoconfigure-1.3.3.RELEASE.jar:1.3.3.RELEASE]
... 31 common frames omitted
Caused by: java.lang.ClassNotFoundException: org.springframework.jdbc.core.JdbcTemplate
at com.ibm.ws.classloading.internal.AppClassLoader.findClassCommonLibraryClassLoaders(AppClassLoader.java:504) ~[na:na]
at com.ibm.ws.classloading.internal.AppClassLoader.findClass(AppClassLoader.java:276) ~[na:na]
at java.lang.ClassLoader.loadClass(Unknown Source) ~[na:1.8.0_151]
at com.ibm.ws.classloading.internal.AppClassLoader.findOrDelegateLoadClass(AppClassLoader.java:482) ~[na:na]
at com.ibm.ws.classloading.internal.AppClassLoader.loadClass(AppClassLoader.java:443) ~[na:na]
at java.lang.ClassLoader.loadClass(Unknown Source) ~[na:1.8.0_151]
... 51 common frames omitted

2018-04-17 23:55:39.228  INFO 5692 --- [utor-thread-104] .b.l.ClasspathLoggingApplicationListener : Application failed to start with classpath: unknown

Answer 1

我已经解决了我所面临的问题。请找到我已完成的以下步骤。

将所有与spring相关的（ spring-core，spring-beans，spring-jdbc等）jar添加到 WEB-INF / lib 文件夹。
在我错过的任何地方添加 @Component 注释，因为应用程序正在为@Autowired提供未定义的bean。
从 server.xml 中删除了“ isolationLevel =”TRANSACTION_READ_UNCOMMITTED“”。这是早先设置的，因此我得到'无法获得JDBC连接异常'。
在 server.xml

'jndi-1.0'，'jdbc-4.1'，'jpa-2.1'

我不知道这是解决方法还是确切的解决方案，但它确实对我有用。

如果这只是一种解决方法，请纠正我。

Spring Boot Not Application不适用于Liberty Server中的JDBC

1 个答案: