上面的一篇文章大家應該看懂了吧？
可能大家在啓動這個項目的時候會出現一個錯誤：
不要緊，這個因爲我們少了一個hibernate的方言，因爲我們把它給註釋了
改成下圖即可
那麼接下來我們繼續使用註解：
1.使用註解我們用到以下幾個常用的註解：
1.註解普通類：@Component
2.註解Dao:@Repository
3.註解Service:@Service
4.註解事務：@Transactional
5.註解Action:@Action
6.注入屬性：@Resource
1.生成的實體類（如果不會生成自己手寫也可以）：
package com.yy.po;
import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.Id;
import javax.persistence.Table;
/**
* BankCust entity. @author MyEclipse Persistence Tools
*/
@Entity
@Table(name = "BANK_CUST", schema = "SCOTT")
public class BankCust implements java.io.Serializable {
// Fields
private String cardId;
private Double balance;
// Constructors
/** default constructor */
public BankCust() {
}
/** full constructor */
public BankCust(String cardId, Double balance) {
this.cardId = cardId;
this.balance = balance;
}
// Property accessors
@Id
@Column(name = "CARD_ID", unique = true, nullable = false)
public String getCardId() {
return this.cardId;
}
public void setCardId(String cardId) {
this.cardId = cardId;
}
@Column(name = "BALANCE", nullable = false, precision = 6)
public Double getBalance() {
return this.balance;
}
public void setBalance(Double balance) {
this.balance = balance;
}
}package com.yy.dao.impl;
import org.springframework.stereotype.Repository;
import com.yy.dao.BankDao;
import com.yy.po.BankCust;
import com.yy.util.HibernateUtil;
@Repository("bankDao")
public class BankDaoImpl extends HibernateUtil implements BankDao {
@Override
public BankCust queryById(String id) {
return (BankCust)this.getSessionFactory().getCurrentSession().get(BankCust.class, id);
}
@Override
public void updateById(BankCust bc) {
this.getSessionFactory().getCurrentSession().update(bc);
}
}
package com.yy.service.impl;
import javax.annotation.Resource;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Propagation;
import org.springframework.transaction.annotation.Transactional;
import com.yy.dao.BankDao;
import com.yy.po.BankCust;
import com.yy.service.BankService;
@Service("bankService")
@Transactional
public class BankServiceImpl implements BankService {
@Resource
private BankDao bankDao;
@Override
public BankCust queryById(String id) {
return bankDao.queryById(id);
}
@Override
public void updateById(BankCust bc) {
bankDao.updateById(bc);
}
}
package com.yy.action;
import java.io.IOException;
import javax.annotation.Resource;
import org.apache.struts2.convention.annotation.Action;
import org.apache.struts2.convention.annotation.Namespace;
import org.apache.struts2.convention.annotation.Result;
import com.yy.action.config.BaseAction;
import com.yy.po.BankCust;
import com.yy.service.BankService;
import com.yy.service.CustomerService;
@Action(value = "bank", results = {
@Result(location = "/success.jsp", name = "success", type = "redirect"),
@Result(name = "error", location = "/fail.jsp") })
@Namespace("/bank")
public class BankAction extends BaseAction {
@Resource
private BankService bankService;
@Resource
private CustomerService customerService;
private BankCust bank;
public void exist() throws IOException {
bank = bankService.queryById(bank.getCardId());
if (bank == null) {
this.getWrite().write("false");
} else {
this.getWrite().write("true");
}
}
public BankCust getBank() {
return bank;
}
public void setBank(BankCust bank) {
this.bank = bank;
}
}
<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
<%@taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c" %>
<%
String path = request.getContextPath();
String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
%>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<base href="<%=basePath%>">
<title>My JSP 'index.jsp' starting page</title>
<meta http-equiv="pragma" content="no-cache">
<meta http-equiv="cache-control" content="no-cache">
<meta http-equiv="expires" content="0">
<meta http-equiv="keywords" content="keyword1,keyword2,keyword3">
<meta http-equiv="description" content="This is my page">
<!--
<link rel="stylesheet" type="text/css" href="styles.css">
-->
<script type="text/javascript" src="js/jquery-1.8.3.min.js"></script>
<script>
var flag=false;
function checkCard(value){
$.post('bank/bank!exist.action',{'bank.cardId':value},function(data){
if(data=='true'){
$("#showMsg").html("可以使用！！");
flag=true;
}else{
$("#showMsg").html("卡號不存在！！");
flag=false;
}
});
}
</script>
</head>
<body>
<input type="text" onblur="checkCard(this.value)" name="bank.cardId"/><span id="showMsg"></span>
</body>
</html>6.訪問
失去焦點如果現實如下內容後臺沒有出現錯誤則表示註解項目已經成功！
大功告成！事務大家可以通過一個DML操作測試即可！