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spring中基于xml的声明式事务控制配置步骤：
示例：
pom.xml4.0.0 com.qublog spring04_tx_xml 1.0-SNAPSHOT jar org.springframework spring-context 5.0.2.RELEASE org.springframework spring-jdbc 5.0.2.RELEASE org.springframework spring-tx 5.0.2.RELEASE org.springframework spring-test 5.0.2.RELEASE mysql mysql-connector-java 8.0.16 org.aspectj aspectjweaver 1.8.7 junit junit 4.12
Account类：
package com.qublog.domain;import java.io.Serializable;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; } @Override public String toString() { return "Account{" + "id=" + id + ", name='" + name + '\'' + ", money=" + money + '}'; }} AccountDao接口：
package com.qublog.dao;import com.qublog.domain.Account;//账户的持久层接口public interface AccountDao { //根据id查询账户 Account findAccountById(Integer id); //根据name查询账户 Account findAccountByName(String name); //更新账户 void updateAccount(Account account);} AccountDaoImpl类：
package com.qublog.dao.impl;import com.qublog.dao.AccountDao;import com.qublog.domain.Account;import org.springframework.jdbc.core.BeanPropertyRowMapper;import org.springframework.jdbc.core.support.JdbcDaoSupport;import java.util.List;public class AccountDaoImpl extends JdbcDaoSupport implements AccountDao { public Account findAccountById(Integer id) { List accounts = getJdbcTemplate().query("select * from account where id=?",new BeanPropertyRowMapper (Account.class),id); return accounts.isEmpty()?null:accounts.get(0); } public Account findAccountByName(String name) { List accounts = getJdbcTemplate().query("select * from account where name=?",new BeanPropertyRowMapper (Account.class),name); if (accounts.isEmpty()) { return null; } if (accounts.size()>1) { throw new RuntimeException("结果集不唯一"); } return accounts.get(0); } public void updateAccount(Account account) { getJdbcTemplate().update("update account set name=?,money=? where id=?",account.getName(),account.getMoney(),account.getId()); }} AccountService接口：
package com.qublog.service;import com.qublog.domain.Account;//账户的业务层接口public interface AccountService { //根据id查询账户信息 Account findAccountById(Integer id); //转账 void transfer(String source, String target, Float money);} AccountServiceImpl类：
package com.qublog.service.impl;import com.qublog.dao.AccountDao;import com.qublog.domain.Account;import com.qublog.service.AccountService;public class AccountServiceImpl implements AccountService { private AccountDao accountDao; public void setAccountDao(AccountDao accountDao) { this.accountDao = accountDao; } public Account findAccountById(Integer id) { return accountDao.findAccountById(id); } public void transfer(String sourceName, String targetName, Float money) { System.out.println("transfer..."); //根据名称查询转出账户 Account source = accountDao.findAccountByName(sourceName); //根据名称查询转入账户 Account target = accountDao.findAccountByName(targetName); //转出账户减钱 source.setMoney(source.getMoney()-money); //转入账户加钱 target.setMoney(target.getMoney()+money); //更新转出账户 accountDao.updateAccount(source); int i=1/0; //更新转入账户 accountDao.updateAccount(target); }} bean.xml