spring中的新注解

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spring整合Junit分析

1、應用程序的入口
? ? ? main方法
2、junit單元測試中，沒有main方法也能執行
?? ?junit集成了一個main方法
?? ?該方法就會判斷當前測試類中哪些方法有 @Test注解
?? ?junit就讓有Test注解的方法執行
3、junit不會管我們是否采用spring框架
?? ?在執行測試方法時，junit根本不知道我們是不是使用了spring框架
?? ?所以也就不會為我們讀取配置文件/配置類創建spring核心容器
4、由以上三點可知
?? ?當測試方法執行時，沒有Ioc容器，就算寫了Autowired注解，也無法實現注入

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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.dym</groupId><artifactId>day02_eesy_04account_annoioc_withoutxml</artifactId><version>1.0-SNAPSHOT</version><build><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><packaging>jar</packaging><dependencies><dependency><groupId>org.springframework</groupId><artifactId>spring-context</artifactId><version>5.0.2.RELEASE</version></dependency><dependency><groupId>org.springframework</groupId><artifactId>spring-test</artifactId><version>5.0.2.RELEASE</version></dependency><dependency><groupId>commons-dbutils</groupId><artifactId>commons-dbutils</artifactId><version>1.4</version></dependency><dependency><groupId>mysql</groupId><artifactId>mysql-connector-java</artifactId><version>5.1.6</version></dependency><dependency><groupId>c3p0</groupId><artifactId>c3p0</artifactId><version>0.9.1.2</version></dependency><dependency><groupId>junit</groupId><artifactId>junit</artifactId><version>4.12</version></dependency></dependencies></project>

Account.java

package com.itheima.domain;import java.io.Serializable;/*** 賬戶的實體類*/ public class Account implements Serializable {private Integer id;private String name;private Float money;public Integer getId() {return id;}public void setId(Integer id) {this.id = id;}public String getName() {return name;}public void setName(String name) {this.name = name;}public Float getMoney() {return money;}public void setMoney(Float money) {this.money = money;}@Overridepublic String toString() {return "Account{" +"id=" + id +", name='" + name + '\'' +", money=" + money +'}';} }

IAccountDao.java

package com.itheima.dao;import com.itheima.domain.Account;import java.util.List;/*** 賬戶的持久層接口*/ public interface IAccountDao {/*** 查詢所有* @return*/List<Account> findAllAccount();/*** 查詢一個* @return*/Account findAccountById(Integer accountId);/*** 保存* @param account*/void saveAccount(Account account);/*** 更新* @param account*/void updateAccount(Account account);/*** 刪除* @param acccountId*/void deleteAccount(Integer acccountId); }

AccountDaoImpl.java

package com.itheima.dao.impl;import com.itheima.dao.IAccountDao; import com.itheima.domain.Account; import org.apache.commons.dbutils.QueryRunner; import org.apache.commons.dbutils.handlers.BeanHandler; import org.apache.commons.dbutils.handlers.BeanListHandler; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.stereotype.Repository;import java.util.List;/*** 賬戶的持久層實現類*/ @Repository("accountDao") public class AccountDaoImpl implements IAccountDao {@Autowiredprivate QueryRunner runner;@Overridepublic List<Account> findAllAccount() {try{return runner.query("select * from account",new BeanListHandler<Account>(Account.class));}catch (Exception e) {throw new RuntimeException(e);}}@Overridepublic Account findAccountById(Integer accountId) {try{return runner.query("select * from account where id = ? ",new BeanHandler<Account>(Account.class),accountId);}catch (Exception e) {throw new RuntimeException(e);}}@Overridepublic void saveAccount(Account account) {try{runner.update("insert into account(name,money)values(?,?)",account.getName(),account.getMoney());}catch (Exception e) {throw new RuntimeException(e);}}@Overridepublic void updateAccount(Account account) {try{runner.update("update account set name=?,money=? where id=?",account.getName(),account.getMoney(),account.getId());}catch (Exception e) {throw new RuntimeException(e);}}@Overridepublic void deleteAccount(Integer accountId) {try{runner.update("delete from account where id=?",accountId);}catch (Exception e) {throw new RuntimeException(e);}} }

IAccountService.java

package com.itheima.service;import com.itheima.domain.Account;import java.util.List;/*** 賬戶的業務層接口*/ public interface IAccountService {/*** 查詢所有* @return*/List<Account> findAllAccount();/*** 查詢一個* @return*/Account findAccountById(Integer accountId);/*** 保存* @param account*/void saveAccount(Account account);/*** 更新* @param account*/void updateAccount(Account account);/*** 刪除* @param acccountId*/void deleteAccount(Integer acccountId); }

AccountServiceImpl.java

package com.itheima.service.impl;import com.itheima.dao.IAccountDao; import com.itheima.domain.Account; import com.itheima.service.IAccountService; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.stereotype.Service;import java.util.List;/*** 賬戶的業務層實現類*/ @Service("accountService") public class AccountServiceImpl implements IAccountService{@Autowiredprivate IAccountDao accountDao;@Overridepublic List<Account> findAllAccount() {return accountDao.findAllAccount();}@Overridepublic Account findAccountById(Integer accountId) {return accountDao.findAccountById(accountId);}@Overridepublic void saveAccount(Account account) {accountDao.saveAccount(account);}@Overridepublic void updateAccount(Account account) {accountDao.updateAccount(account);}@Overridepublic void deleteAccount(Integer acccountId) {accountDao.deleteAccount(acccountId);} }

jdbcConfig.properties

jdbc.driver=com.mysql.jdbc.Driver jdbc.url=jdbc:mysql://localhost:3306/eesy jdbc.username=root jdbc.password=root

JdbcConfig.java

package config;import com.mchange.v2.c3p0.ComboPooledDataSource; import org.apache.commons.dbutils.QueryRunner; 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.Scope;import javax.sql.DataSource;/*** 和spring連接數據庫相關的配置類*/ public class JdbcConfig {@Value("${jdbc.driver}")private String driver;@Value("${jdbc.url}")private String url;@Value("${jdbc.username}")private String username;@Value("${jdbc.password}")private String password;/*** 用于創建一個QueryRunner對象* @param dataSource* @return*/@Bean(name="runner")@Scope("prototype")public QueryRunner createQueryRunner(@Qualifier("ds2") DataSource dataSource){return new QueryRunner(dataSource);}/*** 創建數據源對象* @return*/@Bean(name="ds2")public DataSource createDataSource(){try {ComboPooledDataSource ds = new ComboPooledDataSource();ds.setDriverClass(driver);ds.setJdbcUrl(url);ds.setUser(username);ds.setPassword(password);return ds;}catch (Exception e){throw new RuntimeException(e);}}@Bean(name="ds1")public DataSource createDataSource1(){try {ComboPooledDataSource ds = new ComboPooledDataSource();ds.setDriverClass(driver);ds.setJdbcUrl("jdbc:mysql://localhost:3306/eesy02");ds.setUser(username);ds.setPassword(password);return ds;}catch (Exception e){throw new RuntimeException(e);}} }

SpringConfiguration.java

package config;import org.springframework.context.annotation.ComponentScan; import org.springframework.context.annotation.Import; import org.springframework.context.annotation.PropertySource;/*** 該類是一個配置類，它的作用和bean.xml是一樣的*/ // 細節：當配置類作為AnnotationConfigApplicationContext對象創建的參數時，該注解可以不寫。 //@Configuration @ComponentScan("com.itheima") @Import(JdbcConfig.class) @PropertySource("classpath:jdbcConfig.properties") public class SpringConfiguration {}

測試queryrunner是否單例

QueryRunnerTest.java

package com.itheima.test;import config.SpringConfiguration; import org.apache.commons.dbutils.QueryRunner; import org.junit.Test; import org.springframework.context.ApplicationContext; import org.springframework.context.annotation.AnnotationConfigApplicationContext;/*** 測試queryrunner是否單例*/ public class QueryRunnerTest {@Testpublic void testQueryRunner(){//1.獲取容器ApplicationContext ac = new AnnotationConfigApplicationContext(SpringConfiguration.class);//2.獲取queryRunner對象QueryRunner runner = ac.getBean("runner",QueryRunner.class);QueryRunner runner1 = ac.getBean("runner",QueryRunner.class);System.out.println(runner == runner1);} }

AccountServiceTest.java

package com.itheima.test;import com.itheima.domain.Account; import com.itheima.service.IAccountService; import config.SpringConfiguration; import org.junit.Test; import org.junit.runner.RunWith; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.test.context.ContextConfiguration; import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;import java.util.List;@RunWith(SpringJUnit4ClassRunner.class) @ContextConfiguration(classes = SpringConfiguration.class) public class AccountServiceTest {@Autowiredprivate IAccountService as = null;@Testpublic void testFindAll() {//3.執行方法List<Account> accounts = as.findAllAccount();for(Account account : accounts){System.out.println(account);}}@Testpublic void testFindOne() {//3.執行方法Account account = as.findAccountById(1);System.out.println(account);}@Testpublic void testSave() {Account account = new Account();account.setName("test anno");account.setMoney(12345f);//3.執行方法as.saveAccount(account);}@Testpublic void testUpdate() {//3.執行方法Account account = as.findAccountById(4);account.setMoney(23456f);as.updateAccount(account);}@Testpublic void testDelete() {//3.執行方法as.deleteAccount(4);} }

總結

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