一、在數據庫操做中,當遇到異常時,咱們最關心的是部分回滾仍是總體回滾仍是不理會,怎麼操做怎麼來; 二、因此本章節就着重講解了如何運用Transactional註解來處理事物回滾機制; 三、rollbackFor 屬性:拋出的異常是 rollbackFor 異常的子類時都會回滾數據; 四、noRollbackFor 屬性:拋出的異常是 noRollbackFor 異常的子類時不會回滾數據;拋出的異常不是 noRollbackFor 異常的子類時會回滾數據;
<?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> <artifactId>springms-provider-user-mysql-jdbctemplate-transactional</artifactId> <version>1.0-SNAPSHOT</version> <packaging>jar</packaging> <parent> <groupId>com.springms.cloud</groupId> <artifactId>springms-spring-cloud</artifactId> <version>1.0-SNAPSHOT</version> </parent> <dependencies> <!-- 訪問數據庫模塊 --> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-data-jpa</artifactId> </dependency> <!-- web模塊 --> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-web</artifactId> </dependency> <!-- MYSQL --> <dependency> <groupId>mysql</groupId> <artifactId>mysql-connector-java</artifactId> </dependency> </dependencies> </project>
server: port: 8335 spring: application: name: springms-provider-user-mysql-jdbctemplate-transactional #所有小寫 ##################################################################################################### # mysql 屬性配置 datasource: driver-class-name: com.mysql.jdbc.Driver url: jdbc:mysql://ip:3306/hmilyylimh username: username password: password jpa: hibernate: #ddl-auto: create #ddl-auto:設爲create表示每次都從新建表 ddl-auto: update #ddl-auto:設爲update表示每次都不會從新建表 show-sql: true ##################################################################################################### ##################################################################################################### # 打印日誌 logging: level: root: INFO org.hibernate: INFO org.hibernate.type.descriptor.sql.BasicBinder: TRACE org.hibernate.type.descriptor.sql.BasicExtractor: TRACE com.springms: DEBUG #####################################################################################################
package com.springms.cloud.entity; public class User { private Long id; private String username; private String name; private Integer age; private String balance; public Long getId() { return this.id; } public void setId(Long id) { this.id = id; } public String getUsername() { return this.username; } public void setUsername(String username) { this.username = username; } public String getName() { return this.name; } public void setName(String name) { this.name = name; } public Integer getAge() { return this.age; } public void setAge(Integer age) { this.age = age; } public String getBalance() { return this.balance; } public void setBalance(String balance) { this.balance = balance; } @Override public String toString() { return "User{" + "id=" + id + ", username='" + username + '\'' + ", name='" + name + '\'' + ", age=" + age + ", balance='" + balance + '\'' + '}'; } }
package com.springms.cloud.entity; public class Account { private int id ; private String name ; private double money; public int getId() { return id; } public void setId(int id) { this.id = id; } public String getName() { return name; } public void setName(String name) { this.name = name; } public double getMoney() { return money; } public void setMoney(double money) { this.money = money; } @Override public String toString() { return "Account{" + "id=" + id + ", name='" + name + '\'' + ", money=" + money + '}'; } }
package com.springms.cloud.dao; import com.springms.cloud.entity.User; import java.util.List; /** * 簡單用戶連接Mysql數據庫微服務(經過@Repository註解標註該類爲持久化操做對象)。 * * @author hmilyylimh * * @version 0.0.1 * * @date 17/10/18 * */ public interface IUserDao { User findUserById(Long id); List<User> findAllUsers(); int insertUser(User user); int addUser(User user); int replaceUser(User user); }
package com.springms.cloud.dao; import com.springms.cloud.entity.Account; import java.util.List; public interface IAccountDao { int add(Account account); int update(Account account); int delete(int id); Account findAccountById(int id); List<Account> findAccountList(); }
package com.springms.cloud.dao.impl; import com.springms.cloud.dao.IUserDao; import com.springms.cloud.entity.User; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.jdbc.core.BeanPropertyRowMapper; import org.springframework.jdbc.core.JdbcTemplate; import org.springframework.jdbc.core.RowMapper; import org.springframework.stereotype.Repository; import java.util.List; /** * 簡單用戶連接Mysql數據庫微服務(經過@Repository註解標註該類爲持久化操做對象)。 * * @author hmilyylimh * * @version 0.0.1 * * @date 17/10/18 * */ @Repository public class UserDaoImpl implements IUserDao { /** * 經過@Resource註解引入JdbcTemplate對象。 */ @Autowired private JdbcTemplate jdbcTemplate; @Override public User findUserById(Long id){ // 1. 定義一個sql語句 String querySQL = "select * from user where id = ?"; // 2. 定義一個RowMapper RowMapper<User> rowMapper = new BeanPropertyRowMapper<User>(User.class); // 3. 執行查詢方法 //List<User> list = jdbcTemplate.query("select * from account where id = ?", new Object[]{id}, new BeanPropertyRowMapper(User.class)); User user = jdbcTemplate.queryForObject(querySQL, new Object[]{id}, rowMapper); return user; } @Override public List<User> findAllUsers(){ // 1. 定義一個sql語句 String querySQL = "select * from user"; // 2. 定義一個RowMapper RowMapper<User> rowMapper = new BeanPropertyRowMapper<User>(User.class); // 3. 執行查詢方法 List<User> users = jdbcTemplate.query(querySQL, new Object[]{}, rowMapper); return users; } @Override public int insertUser(User user) { // 1. 定義一個sql語句 String execSQL = "INSERT into user (username, name, age, balance) values (?, ?, ?, ?)"; // 2. 執行查詢方法 int result = jdbcTemplate.update(execSQL, new Object[]{user.getUsername(), user.getName(), user.getAge(), user.getBalance()}); return result; } @Override public int addUser(User user) { // 1. 定義一個sql語句 String execSQL = "INSERT into user (username, name, age, balance) values (?, ?, ?, ?)"; // 2. 執行查詢方法 int result = jdbcTemplate.update(execSQL, new Object[]{user.getUsername(), user.getName(), user.getAge(), user.getBalance()}); return result; } @Override public int replaceUser(User user) { // 1. 定義一個sql語句 String execSQL = "INSERT into user (username, name, age, balance) values (?, ?, ?, ?)"; // 2. 執行查詢方法 int result = jdbcTemplate.update(execSQL, new Object[]{user.getUsername(), user.getName(), user.getAge(), user.getBalance()}); return result; } }
package com.springms.cloud.dao.impl; import com.springms.cloud.dao.IAccountDao; import com.springms.cloud.entity.Account; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.jdbc.core.BeanPropertyRowMapper; import org.springframework.jdbc.core.JdbcTemplate; import org.springframework.stereotype.Repository; import java.util.List; @Repository public class AccountDaoImpl implements IAccountDao { @Autowired private JdbcTemplate jdbcTemplate; @Override public int add(Account account) { return jdbcTemplate.update("insert into account(name, money) values(?, ?)", account.getName(),account.getMoney()); } @Override public int update(Account account) { return jdbcTemplate.update("UPDATE account SET NAME=? ,money=? WHERE id=?", account.getName(),account.getMoney(),account.getId()); } @Override public int delete(int id) { return jdbcTemplate.update("DELETE from TABLE account where id=?",id); } @Override public Account findAccountById(int id) { List<Account> list = jdbcTemplate.query("select * from account where id = ?", new Object[]{id}, new BeanPropertyRowMapper(Account.class)); if(list!=null && list.size()>0){ Account account = list.get(0); return account; }else{ return null; } } @Override public List<Account> findAccountList() { List<Account> list = jdbcTemplate.query("select * from account", new Object[]{}, new BeanPropertyRowMapper(Account.class)); if(list!=null && list.size()>0){ return list; }else{ return null; } } }
package com.springms.cloud.service.impl; import com.springms.cloud.dao.IUserDao; import com.springms.cloud.entity.User; import com.springms.cloud.exception.BusinessExtendsException; import com.springms.cloud.exception.RollbackExceptionExtendsRuntimeException; import com.springms.cloud.service.IUserService; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.stereotype.Service; import org.springframework.transaction.annotation.Isolation; import org.springframework.transaction.annotation.Propagation; import org.springframework.transaction.annotation.Transactional; import java.util.List; /** * 簡單用戶連接Mysql數據庫微服務(經過@Service註解標註該類爲持久化操做對象)。 * * @author hmilyylimh * * @version 0.0.1 * * @date 17/10/18 * */ @Service public class UserServiceImpl implements IUserService{ @Autowired private IUserDao userDao; @Transactional(readOnly = true) @Override public User findUserById(Long id){ return userDao.findUserById(id); } @Transactional(readOnly = true) @Override public List<User> findAllUsers(){ return userDao.findAllUsers(); } /** * 因爲 RuntimeExcepackage com.springms.cloud.service; import com.springms.cloud.entity.User; import java.util.List; /** * 簡單用戶連接Mysql數據庫微服務(經過@Service註解標註該類爲持久化操做對象)。 * * @author hmilyylimh * * @version 0.0.1 * * @date 17/10/18 * */ public interface IUserService { User findUserById(Long id); List<User> findAllUsers(); int insertUser(User user); int addUser(User user); int replaceUser(User user) throws Exception; }
package com.springms.cloud.service; import com.springms.cloud.entity.Account; import java.util.List; public interface IAccountService { int add(Account account); int update(Account account); int delete(int id); Account findAccountById(int id); List<Account> findAccountList(); }
package com.springms.cloud.service; import com.springms.cloud.entity.Account; import com.springms.cloud.entity.User; /** * 簡單用戶連接Mysql數據庫微服務(經過@Service註解標註該類爲持久化操做對象)。 * * @author hmilyylimh * * @version 0.0.1 * * @date 17/10/18 * */ public interface IMovieService { int addMovie(User user, Account account); int insertMovie(User user, Account account) throws Exception; }
package com.springms.cloud.service.impl; import com.springms.cloud.dao.IUserDao; import com.springms.cloud.entity.User; import com.springms.cloud.exception.BusinessExtendsException; import com.springms.cloud.exception.RollbackExceptionExtendsRuntimeException; import com.springms.cloud.service.IUserService; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.stereotype.Service; import org.springframework.transaction.annotation.Isolation; import org.springframework.transaction.annotation.Propagation; import org.springframework.transaction.annotation.Transactional; import java.util.List; /** * 簡單用戶連接Mysql數據庫微服務(經過@Service註解標註該類爲持久化操做對象)。 * * @author hmilyylimh * * @version 0.0.1 * * @date 17/10/18 * */ @Service public class UserServiceImpl implements IUserService{ @Autowired private IUserDao userDao; @Transactional(readOnly = true) @Override public User findUserById(Long id){ return userDao.findUserById(id); } @Transactional(readOnly = true) @Override public List<User> findAllUsers(){ return userDao.findAllUsers(); } /** * 因爲 RuntimeException、RollbackExceptionExtendsRuntimeException 是 Exception 的子類,因此屬於 Exception 的子類異常拋出來,都會回滾數據。 * * @param user * @return */ @Transactional(propagation = Propagation.REQUIRED, isolation= Isolation.DEFAULT, rollbackFor = Exception.class) @Override public int insertUser(User user) { int result = userDao.insertUser(user); if(result > 0){ // throw new RuntimeException("拋出 RuntimeException 異常,測試 rollbackFor = Exception.class 是否有效?"); throw new RollbackExceptionExtendsRuntimeException("拋出 RollbackExceptionExtendsRuntimeException 異常,測試 rollbackFor = Exception.class 是否有效?"); } return result; } @Override public int addUser(User user) { return userDao.addUser(user); } /** * * 因爲 RollbackExceptionExtendsException 是 Exception 的子類,不是 BusinessExtendsException 的子類,因此拋出該異常,會回滾數據;<br/> * * <li>注意:若是要使得 noRollbackFor 屬性生效,註解中 @Transactional 必須得只有 noRollbackFor 屬性,而後 noRollbackFor 的異常必須得是本身定義的異常,而後拋 RuntimeException 異常,這樣咱們才能夠測出 noRollbackFor 回滾與不回滾的場景出來;</li> * * @param user * @return */ @Transactional(noRollbackFor = BusinessExtendsException.class) @Override public int replaceUser(User user) throws Exception { int result = userDao.insertUser(user); if(result > 0){ // throw new NullPointerException("拋出 NullPointerException 異常,測試 noRollbackFor = RuntimeException.class 是否有效?"); // throw new RollbackExceptionExtendsException("拋出 RollbackExceptionExtendsException 異常,測試 noRollbackFor = RuntimeException.class 是否有效?"); // throw new BusinessSubExtendsException("拋出 BusinessSubExtendsException 異常,測試 noRollbackFor = RuntimeException.class 是否有效?"); throw new RuntimeException("拋出 RuntimeException 異常,測試 noRollbackFor = RuntimeException.class 是否有效?"); } return result; } }
package com.springms.cloud.service.impl; import com.springms.cloud.dao.IAccountDao; import com.springms.cloud.entity.Account; import com.springms.cloud.service.IAccountService; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.stereotype.Service; import java.util.List; @Service public class AccountServiceImpl implements IAccountService { @Autowired IAccountDao accountDAO; @Override public int add(Account account) { return accountDAO.add(account); } @Override public int update(Account account) { return accountDAO.update(account); } @Override public int delete(int id) { return accountDAO.delete(id); } @Override public Account findAccountById(int id) { return accountDAO.findAccountById(id); } @Override public List<Account> findAccountList() { return accountDAO.findAccountList(); } }
package com.springms.cloud.service.impl; import com.springms.cloud.dao.IAccountDao; import com.springms.cloud.dao.IUserDao; import com.springms.cloud.entity.Account; import com.springms.cloud.entity.User; import com.springms.cloud.exception.BusinessExtendsException; import com.springms.cloud.exception.BusinessSubExtendsException; import com.springms.cloud.service.IMovieService; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.stereotype.Service; import org.springframework.transaction.annotation.Isolation; import org.springframework.transaction.annotation.Propagation; import org.springframework.transaction.annotation.Transactional; /** * 簡單用戶連接Mysql數據庫微服務(經過@Service註解標註該類爲持久化操做對象)。 * * @author hmilyylimh * * @version 0.0.1 * * @date 17/10/18 * */ @Service public class MovieServiceImpl implements IMovieService { @Autowired private IUserDao userDao; @Autowired private IAccountDao accountDao; @Transactional(propagation = Propagation.REQUIRED, isolation= Isolation.DEFAULT, rollbackFor = Exception.class) @Override public int addMovie(User user, Account account) { int result1 = userDao.addUser(user); int result2 = accountDao.add(account); if(result1 > 0 || result2 > 0){ throw new RuntimeException("拋出 RuntimeException 異常,測試 rollbackFor = Exception.class 是否有效?"); } return 0; } @Transactional(noRollbackFor = BusinessExtendsException.class) @Override public int insertMovie(User user, Account account) throws Exception { int result1 = userDao.insertUser(user); int result2 = accountDao.add(account); if(result1 > 0 || result2 > 0){ // throw new NullPointerException("拋出 NullPointerException 異常,測試 noRollbackFor = RuntimeException.class 是否有效?"); // throw new RollbackExceptionExtendsException("拋出 RollbackExceptionExtendsException 異常,測試 noRollbackFor = RuntimeException.class 是否有效?"); throw new BusinessSubExtendsException("拋出 BusinessSubExtendsException 異常,測試 noRollbackFor = RuntimeException.class 是否有效?"); // throw new RuntimeException("拋出 RuntimeException 異常,測試 noRollbackFor = RuntimeException.class 是否有效?"); } return 0; } }
package com.springms.cloud.exception; /** * * * @author hmilyylimh * * @version 0.0.1 * * @date 17/10/18 * */ public class BusinessExtendsException extends Exception { public BusinessExtendsException() { } public BusinessExtendsException(String message) { super(message); } public BusinessExtendsException(String message, Throwable cause) { super(message, cause); } public BusinessExtendsException(Throwable cause) { super(cause); } public BusinessExtendsException(String message, Throwable cause, boolean enableSuppression, boolean writableStackTrace) { super(message, cause, enableSuppression, writableStackTrace); } }
package com.springms.cloud.exception; /** * * * @author hmilyylimh * * @version 0.0.1 * * @date 17/10/18 * */ public class BusinessSubExtendsException extends BusinessExtendsException { public BusinessSubExtendsException() { } public BusinessSubExtendsException(String message) { super(message); } public BusinessSubExtendsException(String message, Throwable cause) { super(message, cause); } public BusinessSubExtendsException(Throwable cause) { super(cause); } public BusinessSubExtendsException(String message, Throwable cause, boolean enableSuppression, boolean writableStackTrace) { super(message, cause, enableSuppression, writableStackTrace); } }
package com.springms.cloud.exception; /** * * * @author hmilyylimh * * @version 0.0.1 * * @date 17/10/18 * */ public class RollbackExceptionExtendsException extends Exception { public RollbackExceptionExtendsException() { } public RollbackExceptionExtendsException(String message) { super(message); } public RollbackExceptionExtendsException(String message, Throwable cause) { super(message, cause); } public RollbackExceptionExtendsException(Throwable cause) { super(cause); } public RollbackExceptionExtendsException(String message, Throwable cause, boolean enableSuppression, boolean writableStackTrace) { super(message, cause, enableSuppression, writableStackTrace); } }
package com.springms.cloud.exception; /** * 回滾異常,測試語句:@Transactional(propagation = Propagation.REQUIRED, isolation= Isolation.DEFAULT, rollbackFor = Exception.class) 是否生效。 * * 結果:含有該屬性的 rollbackFor = Exception.class,只要拋出的異常屬於 Exception 的子類的話,就能夠正常回滾數據; * * @author hmilyylimh * * @version 0.0.1 * * @date 17/10/18 * */ public class RollbackExceptionExtendsRuntimeException extends RuntimeException { public RollbackExceptionExtendsRuntimeException() { } public RollbackExceptionExtendsRuntimeException(String message) { super(message); } public RollbackExceptionExtendsRuntimeException(String message, Throwable cause) { super(message, cause); } public RollbackExceptionExtendsRuntimeException(Throwable cause) { super(cause); } public RollbackExceptionExtendsRuntimeException(String message, Throwable cause, boolean enableSuppression, boolean writableStackTrace) { super(message, cause, enableSuppression, writableStackTrace); } }
package com.springms.cloud.controller; import com.springms.cloud.service.IUserService; import com.springms.cloud.entity.User; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.web.bind.annotation.*; import java.util.ArrayList; import java.util.List; /** * 用戶微服務Controller。 * * @author hmilyylimh * * @version 0.0.1 * * @date 17/10/18 * */ @RestController public class UserMysqlJdbcTransactionalController { @Autowired private IUserService userService; @GetMapping("/simplejdbc/{id}") public User findUserById(@PathVariable Long id) { return this.userService.findUserById(id); } @GetMapping("/simplejdbc/list") public List<User> findAllUsers() { List<User> users = this.userService.findAllUsers(); List<User> resultUsers = new ArrayList<>(users.subList(users.size()-6, users.size())); return resultUsers; } /** * 添加一個student,使用postMapping接收post請求 * * http://localhost:8315/simple/addUser?username=user11&age=11&balance=11 * * @return */ @PostMapping("/simplejdbc/insertUser") public User insertUser(@RequestParam(value = "username", required=false) String username, @RequestParam(value = "age", required=false) Integer age, @RequestParam(value = "balance", required=false) String balance){ User user=new User(); user.setUsername(username); user.setName(username); user.setAge(age); user.setBalance(balance); int result = userService.insertUser(user); if(result > 0){ return user; } user.setId(0L); user.setName(null); user.setUsername(null); user.setBalance(null); return user; } /** * 添加一個student,使用postMapping接收post請求 * * http://localhost:8315/simple/addUser?username=user11&age=11&balance=11 * * @return */ @PostMapping("/simplejdbc/addUser") public User addUser(@RequestParam(value = "username", required=false) String username, @RequestParam(value = "age", required=false) Integer age, @RequestParam(value = "balance", required=false) String balance){ User user=new User(); user.setUsername(username); user.setName(username); user.setAge(age); user.setBalance(balance); int result = userService.addUser(user); if(result > 0){ return user; } user.setId(0L); user.setName(null); user.setUsername(null); user.setBalance(null); return user; } /** * 添加一個student,使用postMapping接收post請求 * * http://localhost:8315/simple/addUser?username=user11&age=11&balance=11 * * @return */ @PostMapping("/simplejdbc/replaceUser") public User replaceUser(@RequestParam(value = "username", required=false) String username, @RequestParam(value = "age", required=false) Integer age, @RequestParam(value = "balance", required=false) String balance) throws Exception { User user=new User(); user.setUsername(username); user.setName(username); user.setAge(age); user.setBalance(balance); int result = 0; result = userService.replaceUser(user); user.setId((long) 0); user.setName(null); user.setUsername(null); user.setBalance(null); return user; } }
package com.springms.cloud.controller; import com.springms.cloud.entity.Account; import com.springms.cloud.service.IAccountService; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.web.bind.annotation.*; import java.util.List; @RestController @RequestMapping("/account") public class AccountController { @Autowired IAccountService accountService; @RequestMapping(value = "/list",method = RequestMethod.GET) public List<Account> getAccounts(){ return accountService.findAccountList(); } @RequestMapping(value = "/{id}",method = RequestMethod.GET) public Account getAccountById(@PathVariable("id") int id){ return accountService.findAccountById(id); } @RequestMapping(value = "/{id}",method = RequestMethod.PUT) public String updateAccount(@PathVariable("id")int id , @RequestParam(value = "name",required = true)String name, @RequestParam(value = "money" ,required = true)double money){ Account account=new Account(); account.setMoney(money); account.setName(name); account.setId(id); int t=accountService.update(account); if(t==1){ return account.toString(); }else { return "fail"; } } @RequestMapping(value = "",method = RequestMethod.POST) public String postAccount( @RequestParam(value = "name")String name, @RequestParam(value = "money" )double money){ Account account=new Account(); account.setMoney(money); account.setName(name); int t= accountService.add(account); if(t==1){ return account.toString(); }else { return "fail"; } } }
package com.springms.cloud.controller; import com.springms.cloud.entity.Account; import com.springms.cloud.entity.User; import com.springms.cloud.service.IMovieService; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.web.bind.annotation.*; /** * 用戶微服務電影Controller。 * * @author hmilyylimh * * @version 0.0.1 * * @date 17/10/18 * */ @RestController public class MovieMysqlJdbcTransactionalController { @Autowired private IMovieService moiveService; /** * 添加一個student,使用postMapping接收post請求 * * http://localhost:8335/simple/addUser?username=user11&age=11&balance=11 * * @return */ @PostMapping("/movie/addMovie") public User addMovie(@RequestParam(value = "username", required=false) String username, @RequestParam(value = "age", required=false) Integer age, @RequestParam(value = "balance", required=false) String balance){ User user=new User(); user.setUsername(username); user.setName(username); user.setAge(age); user.setBalance(balance); Account account = new Account(); account.setName(username); account.setMoney(Double.parseDouble(balance)); int result = moiveService.addMovie(user, account); if(result > 0){ return user; } user.setId(0L); user.setName(null); user.setUsername(null); user.setBalance(null); return user; } /** * 添加一個student,使用postMapping接收post請求 * * http://localhost:8335/simple/addUser?username=user11&age=11&balance=11 * * @return */ @PostMapping("/movie/insertMovie") public User insertMovie(@RequestParam(value = "username", required=false) String username, @RequestParam(value = "age", required=false) Integer age, @RequestParam(value = "balance", required=false) String balance) throws Exception { User user=new User(); user.setUsername(username); user.setName(username); user.setAge(age); user.setBalance(balance); Account account = new Account(); account.setName(username); account.setMoney(Double.parseDouble(balance)); int result = moiveService.insertMovie(user, account); if(result > 0){ return user; } user.setId(0L); user.setName(null); user.setUsername(null); user.setBalance(null); return user; } }
package com.springms.cloud; import org.springframework.boot.SpringApplication; import org.springframework.boot.autoconfigure.SpringBootApplication; /** * 連接Mysql數據庫,經過JdbcTemplate編寫數據庫訪問,並且支持事物處理機制。 * * @author hmilyylimh * * @version 0.0.1 * * @date 17/10/18 * */ @SpringBootApplication public class MsProviderUserMysqlJdbcTransactionalApplication { public static void main(String[] args) { SpringApplication.run(MsProviderUserMysqlJdbcTransactionalApplication.class, args); System.out.println("【【【【【【 連接MysqlJdbcTransactional數據庫微服務 】】】】】】已啓動."); } }
/**************************************************************************************** 1、簡單用戶連接Mysql數據庫微服務(經過JdbcTemplate編寫數據訪問,並且支持事物處理機制,使用 rollbackFor 屬性,數據回滾): 一、給 insertUser 方法添加註解:@Transactional(propagation = Propagation.REQUIRED, isolation= Isolation.DEFAULT, rollbackFor = Exception.class); 二、insertUser 拋出 RollbackExceptionExtendsRuntimeException 異常; 三、啓動 springms-provider-user-mysql-jdbctemplate-transactional 模塊服務,啓動1個端口; 四、在瀏覽器輸入地址 http://localhost:8315/simplejdbc/list 能夠看到全部用戶信息成功的被打印出來; 五、使用 REST Client 執行 "/simplejdbc/insertUser" 添加參數執行接口,結果數據沒有入庫,數據被回滾了; ****************************************************************************************/ /**************************************************************************************** 2、簡單用戶連接Mysql數據庫微服務(經過JdbcTemplate編寫數據訪問,並且支持事物處理機制,使用 noRollbackFor 屬性,數據回滾): 一、給 replaceUser 方法添加註解:@Transactional(noRollbackFor = BusinessExtendsException.class); 二、replaceUser 拋出 RuntimeException 異常; 三、啓動 springms-provider-user-mysql-jdbctemplate-transactional 模塊服務,啓動1個端口; 四、在瀏覽器輸入地址 http://localhost:8315/simplejdbc/list 能夠看到全部用戶信息成功的被打印出來; 五、使用 REST Client 執行 "/simplejdbc/replaceUser" 添加參數執行接口,結果數據沒有入庫,數據被回滾了; ****************************************************************************************/ /**************************************************************************************** 3、簡單用戶連接Mysql數據庫微服務(經過JdbcTemplate編寫數據訪問,並且支持事物處理機制,使用 noRollbackFor 屬性,數據沒有回滾): 一、給 replaceUser 方法添加註解:@Transactional(noRollbackFor = BusinessExtendsException.class); 二、replaceUser 拋出 BusinessSubExtendsException 異常; 三、啓動 springms-provider-user-mysql-jdbctemplate-transactional 模塊服務,啓動1個端口; 四、在瀏覽器輸入地址 http://localhost:8315/simplejdbc/list 能夠看到全部用戶信息成功的被打印出來; 五、使用 REST Client 執行 "/simplejdbc/replaceUser" 添加參數執行接口,結果數據已經入庫了,數據沒有回滾了; 注意:若是要使得 noRollbackFor 屬性生效,註解中 @Transactional 必須得只有 noRollbackFor 屬性,而後 noRollbackFor 的異常必須得是本身定義的異常,而後拋 RuntimeException 異常,這樣咱們才能夠測出 noRollbackFor 回滾與不回滾的場景出來; ****************************************************************************************/ /**************************************************************************************** 4、簡單用戶連接Mysql數據庫微服務(經過JdbcTemplate編寫數據訪問,並且支持事物處理機制,同時操做多個DAO文件入庫,而後選擇註解是否進行回滾數據): 這裏就不作多的解釋了,MovieServiceImpl 就是操做多個DAO文件入庫,而後處理是否回滾數據的。 注意:若是要使得 noRollbackFor 屬性生效,註解中 @Transactional 必須得只有 noRollbackFor 屬性,而後 noRollbackFor 的異常必須得是本身定義的異常,而後拋 RuntimeException 異常,這樣咱們才能夠測出 noRollbackFor 回滾與不回滾的場景出來; rollbackFor 屬性:拋出的異常是 rollbackFor 異常的子類時都會回滾數據; noRollbackFor 屬性:拋出的異常是 noRollbackFor 異常的子類時不會回滾數據;拋出的異常不是 noRollbackFor 異常的子類時會回滾數據; ****************************************************************************************/
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