关于Spring MVC注解 @Transactional 事务标签 @InitBinder 标签

主要用到了spring-aop-2.5.6.jar的AOP支持包！

之前我们在AccountService中加入了注解@Transactional标签，但是要想要真正发挥事务作用，还需要一些配置。

主要需要调整dao.xml文件

dao.xml-事务管理

Xml代码



<bean
id="transactionManager"
class="org.springframework.jdbc.datasource.DataSourceTransactionManager"
p:dataSource-ref="dataSource" />
<tx:annotation-driven
transaction-manager="transactionManager" />

[xml]
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<bean
id="transactionManager"
class="org.springframework.jdbc.datasource.DataSourceTransactionManager"
p:dataSource-ref="dataSource" />
<tx:annotation-driven
transaction-manager="transactionManager" />

<bean
id="transactionManager"
class="org.springframework.jdbc.datasource.DataSourceTransactionManager"
p:dataSource-ref="dataSource" />
<tx:annotation-driven
transaction-manager="transactionManager" />

细化一下AccountService接口方法

AccountService.java

Java代码



/**
* 2010-1-23
*/
package org.zlex.spring.service;

import org.springframework.dao.DataAccessException;
import org.springframework.transaction.annotation.Transactional;
import org.zlex.spring.domain.Account;

/**
* 账户业务接口
*
* @author <a href="mailto:zlex.dongliang@gmail.com">梁栋</a>

* @version 1.0

* @since 1.0

*/
public interface AccountService {

/**

* 获得账户
*
* @param username

* @param password

* @return

*/
@Transactional(readOnly = true)
Account read(String username, String password);

/**

* 获得账户
*
* @param id

* @return

*/
@Transactional(readOnly = true)
Account read(int id);

/**

* 注册用户
*
* @param account

* @return

*/
@Transactional(readOnly = false, rollbackFor = DataAccessException.class)

Account register(Account account);
}

[java]
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/** * 2010-1-23 */ package org.zlex.spring.service; import org.springframework.dao.DataAccessException; import org.springframework.transaction.annotation.Transactional; import org.zlex.spring.domain.Account; /** * 账户业务接口 * * @author <a href="mailto:zlex.dongliang@gmail.com">梁栋</a> * @version 1.0 * @since 1.0 */ public interface AccountService { /** * 获得账户 * * @param username * @param password * @return */ @Transactional(readOnly = true) Account read(String username, String password); /** * 获得账户 * * @param id * @return */ @Transactional(readOnly = true) Account read(int id); /** * 注册用户 * * @param account * @return */ @Transactional(readOnly = false, rollbackFor = DataAccessException.class) Account register(Account account); }

/**
* 2010-1-23
*/
package org.zlex.spring.service;

import org.springframework.dao.DataAccessException;
import org.springframework.transaction.annotation.Transactional;
import org.zlex.spring.domain.Account;

/**
* 账户业务接口
*
* @author <a href="mailto:zlex.dongliang@gmail.com">梁栋</a>
* @version 1.0
* @since 1.0
*/
public interface AccountService {

/**
* 获得账户
*
* @param username
* @param password
* @return
*/
@Transactional(readOnly = true)
Account read(String username, String password);

/**
* 获得账户
*
* @param id
* @return
*/
@Transactional(readOnly = true)
Account read(int id);

/**
* 注册用户
*
* @param account
* @return
*/
@Transactional(readOnly = false, rollbackFor = DataAccessException.class)
Account register(Account account);
}

这里我把注解@Transactional调整到了具体的方法上，也就是说这样写的话，凡是加入注解的标注的方法都属于事务配置！

Account register(Account account);用做用户注册作用！

@Transactional(readOnly = true)只读属性

@Transactional(readOnly = false, rollbackFor = DataAccessException.class)只读关闭，遇到DataAccessException异常回滚！如果不对异常进行处理，该异常将一直向上层抛出，直至抛出到页面！

如果你的Eclipse集成了SpringIDE，你可以观察一下这时的xml配置文件和AccoutServiceImpl.java的变化！





这次，来个用户注册功能演示，故意在某个位置制造一个异常，看看是否正常回滚！

先看注册控制器

RegisterController.java

Java代码



/**
* 2010-2-4
*/
package org.zlex.spring.controller;

import java.text.DateFormat;
import java.text.SimpleDateFormat;
import java.util.Date;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.propertyeditors.CustomDateEditor;
import org.springframework.stereotype.Controller;
import org.springframework.ui.ModelMap;
import org.springframework.web.bind.WebDataBinder;
import org.springframework.web.bind.annotation.InitBinder;
import org.springframework.web.bind.annotation.ModelAttribute;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.zlex.spring.domain.Account;
import org.zlex.spring.service.AccountService;

/**
* 用户注册控制器
*
* @author <a href="mailto:zlex.dongliang@gmail.com">梁栋</a>

* @version 1.0

* @since 1.0

*/
@Controller
@RequestMapping(value = "/register.do")
public class RegisterController {

@Autowired
private AccountService accountService;

@InitBinder
public void initBinder(WebDataBinder binder) {
// 忽略字段绑定异常

// binder.setIgnoreInvalidFields(true);

DateFormat format = new SimpleDateFormat("yyyy-MM-dd");
binder.registerCustomEditor(Date.class, "birthday",
new CustomDateEditor(format, true));
}

@RequestMapping(method = RequestMethod.GET)
public String initForm(ModelMap model) {
Account account = new Account();
model.addAttribute("account", account);
// 直接跳转到登录页面

return "account/register";
}

@RequestMapping(method = RequestMethod.POST)
protected String submit(@ModelAttribute("account") Account account) {

int id = accountService.register(account).getId();
// 跳转到用户信息页面

return "redirect:profile.do?id=" + id;
}
}

[java]
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/**
* 2010-2-4
*/
package org.zlex.spring.controller;

import java.text.DateFormat;
import java.text.SimpleDateFormat;
import java.util.Date;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.propertyeditors.CustomDateEditor;
import org.springframework.stereotype.Controller;
import org.springframework.ui.ModelMap;
import org.springframework.web.bind.WebDataBinder;
import org.springframework.web.bind.annotation.InitBinder;
import org.springframework.web.bind.annotation.ModelAttribute;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.zlex.spring.domain.Account;
import org.zlex.spring.service.AccountService;

/**
* 用户注册控制器
*
* @author <a href="mailto:zlex.dongliang@gmail.com">梁栋</a>
* @version 1.0
* @since 1.0
*/
@Controller
@RequestMapping(value = "/register.do")
public class RegisterController {

@Autowired
private AccountService accountService;

@InitBinder
public void initBinder(WebDataBinder binder) {
// 忽略字段绑定异常
// binder.setIgnoreInvalidFields(true);

DateFormat format = new SimpleDateFormat("yyyy-MM-dd");
binder.registerCustomEditor(Date.class, "birthday",
new CustomDateEditor(format, true));
}

@RequestMapping(method = RequestMethod.GET)
public String initForm(ModelMap model) {
Account account = new Account();
model.addAttribute("account", account);
// 直接跳转到登录页面
return "account/register";
}

@RequestMapping(method = RequestMethod.POST)
protected String submit(@ModelAttribute("account") Account account) {
int id = accountService.register(account).getId();
// 跳转到用户信息页面
return "redirect:profile.do?id=" + id;
}
}

/**
* 2010-2-4
*/
package org.zlex.spring.controller;

import java.text.DateFormat;
import java.text.SimpleDateFormat;
import java.util.Date;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.propertyeditors.CustomDateEditor;
import org.springframework.stereotype.Controller;
import org.springframework.ui.ModelMap;
import org.springframework.web.bind.WebDataBinder;
import org.springframework.web.bind.annotation.InitBinder;
import org.springframework.web.bind.annotation.ModelAttribute;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.zlex.spring.domain.Account;
import org.zlex.spring.service.AccountService;

/**
* 用户注册控制器
*
* @author <a href="mailto:zlex.dongliang@gmail.com">梁栋</a>
* @version 1.0
* @since 1.0
*/
@Controller
@RequestMapping(value = "/register.do")
public class RegisterController {

@Autowired
private AccountService accountService;

@InitBinder
public void initBinder(WebDataBinder binder) {
// 忽略字段绑定异常
// binder.setIgnoreInvalidFields(true);

DateFormat format = new SimpleDateFormat("yyyy-MM-dd");
binder.registerCustomEditor(Date.class, "birthday",
new CustomDateEditor(format, true));
}

@RequestMapping(method = RequestMethod.GET)
public String initForm(ModelMap model) {
Account account = new Account();
model.addAttribute("account", account);
// 直接跳转到登录页面
return "account/register";
}

@RequestMapping(method = RequestMethod.POST)
protected String submit(@ModelAttribute("account") Account account) {
int id = accountService.register(account).getId();
// 跳转到用户信息页面
return "redirect:profile.do?id=" + id;
}
}

@InitBinder用于表单自定义属性绑定。这里我们要求输入一个日期格式的生日。

@RequestMapping(method = RequestMethod.GET)用于初始化页面。

@RequestMapping(method = RequestMethod.POST)用于提交页面。

再看注册页面

register.jsp

Jsp代码



<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>注册</title>
<link rel="stylesheet" type="text/css" href="css/style.css" />

<script type="text/javascript" src="js/calendar.js"></script></head>
<body>
<fieldset><legend>用户注册</legend><form:form
commandName="account">
<ul>
<li><form:label path="username">用户名:</form:label><form:input
path="username" /></li>
<li><form:label path="password">密码:</form:label><form:password
path="password" /></li>
<li><form:label path="birthday">生日:</form:label><form:input
path="birthday" onfocus="showDate(this);" /></li>
<li><form:label path="email">Email:</form:label><form:input
path="email" /></li>
<li>
<button type="submit">注册</button>
<button type="reset">重置</button>
</li>
</ul>
</form:form></fieldset>
</body>
</html>

<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>注册</title>
<link rel="stylesheet" type="text/css" href="css/style.css" />
<script type="text/javascript" src="js/calendar.js"></script>
</head>
<body>
<fieldset><legend>用户注册</legend><form:form
commandName="account">
<ul>
<li><form:label path="username">用户名:</form:label><form:input
path="username" /></li>
<li><form:label path="password">密码:</form:label><form:password
path="password" /></li>
<li><form:label path="birthday">生日:</form:label><form:input
path="birthday" onfocus="showDate(this);" /></li>
<li><form:label path="email">Email:</form:label><form:input
path="email" /></li>
<li>
<button type="submit">注册</button>
<button type="reset">重置</button>
</li>
</ul>
</form:form></fieldset>
</body>
</html>

这里我用了一个JavaScript日期控制标签：

Html代码



<script type="text/javascript" src="js/calendar.js"></script>

[html]
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<script type="text/javascript" src="js/calendar.js"></script>

<script type="text/javascript" src="js/calendar.js"></script>

使用起来就像是这样：



非常好用！！！ 当然，你完全可以使用JE上的那个JS控件！

接下来稍微调整一下AccountService接口及其实现AccountServiceImpl

AccountService.java

Java代码



public interface AccountService {
// 省略

/**

* 注册用户
*
* @param account

* @return

*/
@Transactional(readOnly = false, rollbackFor = DataAccessException.class)

Account register(Account account);
// 省略

}

[java]
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public interface AccountService { // 省略 /** * 注册用户 * * @param account * @return */ @Transactional(readOnly = false, rollbackFor = DataAccessException.class) Account register(Account account); // 省略 }

public interface AccountService {
// 省略
/**
* 注册用户
*
* @param account
* @return
*/
@Transactional(readOnly = false, rollbackFor = DataAccessException.class)
Account register(Account account);
// 省略
}

Java代码



@Service
public class AccountServiceImpl implements AccountService {

@Autowired
private AccountDao accountDao;

// 省略

@Override
public Account register(Account account) {
accountDao.create(account);
return accountDao.read(account.getUsername());
}
}

[java]
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@Service public class AccountServiceImpl implements AccountService { @Autowired private AccountDao accountDao; // 省略 @Override public Account register(Account account) { accountDao.create(account); return accountDao.read(account.getUsername()); } }

@Service
public class AccountServiceImpl implements AccountService {

@Autowired
private AccountDao accountDao;

// 省略

@Override
public Account register(Account account) {
accountDao.create(account);
return accountDao.read(account.getUsername());
}
}

为了在插入一条记录后获得当前用户的主键，我们还得这么玩！ 的确有点雷人～

从架构考虑，这是符合业务要求的实现！如果用iBatis或者Hibernate，这个问题就有数据库一次IO处理完成了！

再看看AccountDao接口及其实现AccountDaoImpl

AccountDao.java

Java代码



public interface AccountDao {
// 省略

/**

* 构建用户记录

*
* @param account

* @return

*/
void create(Account account);
}

[java]
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public interface AccountDao { // 省略 /** * 构建用户记录 * * @param account * @return */ void create(Account account); }

public interface AccountDao {
// 省略
/**
* 构建用户记录
*
* @param account
* @return
*/
void create(Account account);
}

AccountDaoImpl.java

Java代码



@Repository
public class AccountDaoImpl implements AccountDao {

// 省略

@Override
public void create(Account account) {
String sql = "INSERT INTO account(username, password, birthday, email) VALUES(?,?,?,?)";

jdbcTemplate.update(sql, new Object[] { account.getUsername(),
account.getPassword(), account.getBirthday(),
account.getEmail() });
}
}

[java]
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@Repository public class AccountDaoImpl implements AccountDao { // 省略 @Override public void create(Account account) { String sql = "INSERT INTO account(username, password, birthday, email) VALUES(?,?,?,?)"; jdbcTemplate.update(sql, new Object[] { account.getUsername(), account.getPassword(), account.getBirthday(), account.getEmail() }); } }

@Repository
public class AccountDaoImpl implements AccountDao {
// 省略

@Override
public void create(Account account) {
String sql = "INSERT INTO account(username, password, birthday, email) VALUES(?,?,?,?)";

jdbcTemplate.update(sql, new Object[] { account.getUsername(),
account.getPassword(), account.getBirthday(),
account.getEmail() });
}
}

来个注册演示！


注册：



信息展示：



来制造一起事故！


先看看数据库目前的状况！



在AccountDaoImpl中来个破坏！


Java代码



@Override
public void create(Account account) {
String sql = "INSERT INTO account(username, password, birthday, email) VALUES(?,?,?,?)";

jdbcTemplate.update(sql, new Object[] { account.getUsername(),
account.getPassword(), account.getBirthday(),
account.getEmail() });

throw new RecoverableDataAccessException("TEST");

}

[java]
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@Override public void create(Account account) { String sql = "INSERT INTO account(username, password, birthday, email) VALUES(?,?,?,?)"; jdbcTemplate.update(sql, new Object[] { account.getUsername(), account.getPassword(), account.getBirthday(), account.getEmail() }); throw new RecoverableDataAccessException("TEST"); }

@Override
public void create(Account account) {
String sql = "INSERT INTO account(username, password, birthday, email) VALUES(?,?,?,?)";

jdbcTemplate.update(sql, new Object[] { account.getUsername(),
account.getPassword(), account.getBirthday(),
account.getEmail() });

throw new RecoverableDataAccessException("TEST");
}

我们强行在执行完Insert语句后抛出DataAccessException异常（RecoverableDataAccessException）！


来个注册试试！



点击提交看看返回的异常！




异常回滚生效！

数据库中当然是什么都没有，我就不废话了！

相关实现见附件