使用Nutz[1.b.38]对数据库表的CRUD操作
今天看了下Nutz最新的版本库，发现“灰太狼”居然把我上一篇文章《在Nutz中使用Ioc-Annotation的入门教程》收录在Nutz的发行包中，为了表达“灰太狼”的厚爱，决定写多三篇文章以表心意！！！
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第一篇：使用Nutz[1.b.38]对数据库表的CRUD操作
第二篇：使用Nutz[1.b.38]对关联数据表的一对一/一对多操作 ----已完成，点击查看
第三篇：在Nutz[1.b.38]中使用视图对关联数据表的操作 ----已完成，点击查看
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为了表达对Nutz的支持，这三篇文章最后都会提供完整的源代码，顺便作为Nutz的demo例子。
好的，直奔主题，今天先完成第一篇，接下来在此基础上完成第二篇、第三篇。
环境与版本：
数据库：MySQL
Nutz：1.b.38
IDE：Eclipse
涉及的知识点：
1、Nutz对数据库的CURD操作
2、除了数据源和dao对象使用dao.js配置外，其余全部使用Ioc-Annotation注解
3、在@Ok注解中使用NutzEL表达式，不必为跳转到Fail视图而故意抛出异常了
一、数据库表
-- ----------------------------
-- Table structure for `departmentinfo`
-- ----------------------------
DROP TABLE IF EXISTS `departmentinfo`;
CREATE TABLE `departmentinfo` (
`departmentInfoId` int(11) NOT NULL AUTO_INCREMENT,
`departmentName` varchar(50) DEFAULT NULL,
PRIMARY KEY (`departmentInfoId`)
) ENGINE=InnoDB AUTO_INCREMENT=8 DEFAULT CHARSET=utf8;
-- ----------------------------
-- Records of departmentinfo
-- ----------------------------
INSERT INTO `departmentinfo` VALUES ('1', 'IT部');
INSERT INTO `departmentinfo` VALUES ('2', '人力资源');
INSERT INTO `departmentinfo` VALUES ('3', '财务部');
INSERT INTO `departmentinfo` VALUES ('4', '市场部');
二、例子使用的Jar包
![使用Nutz[1.b.38]对数据库表的CRUD操作](http://img.e-com-net.com/image/product/1f10c4aff1604953b440d703d58d4576.jpg)
三、结构图
![使用Nutz[1.b.38]对数据库表的CRUD操作](http://img.e-com-net.com/image/product/c8e7a7ea5ce441fe9189db98d0a2c8d3.jpg)
![使用Nutz[1.b.38]对数据库表的CRUD操作](http://img.e-com-net.com/image/product/e553f7a7d34444348a2abbfaf3a42ad0.jpg)
四、代码
1、首先配置Web.xml，配置Nutz的主模块。
<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://java.sun.com/xml/ns/javaee" xmlns:web="http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd" id="WebApp_ID" version="2.5">
<display-name>UserManageSystem</display-name>
<filter>
<filter-name>nutz</filter-name>
<filter-class>org.nutz.mvc.NutFilter</filter-class>
<init-param>
<param-name>modules</param-name>
<param-value>demo.nutz.setup.MainModule</param-value>
</init-param>
</filter>
<filter-mapping>
<filter-name>nutz</filter-name>
<url-pattern>*.shtml</url-pattern>
</filter-mapping>
<welcome-file-list>
<welcome-file>index.jsp</welcome-file>
</welcome-file-list>
</web-app>
2、创建主模块类MainModule.java
package demo.nutz.setup; import org.nutz.mvc.annotation.IocBy; import org.nutz.mvc.annotation.Modules; import org.nutz.mvc.annotation.SetupBy; import org.nutz.mvc.ioc.provider.ComboIocProvider; import demo.nutz.action.DepartmentInfoAction; /** * 主模块 * * @author gevin([email protected]) * */ @Modules(value = DepartmentInfoAction.class, scanPackage = true) @IocBy(type = ComboIocProvider.class, args = { "*org.nutz.ioc.loader.json.JsonLoader", "ioc/dao.js", "*org.nutz.ioc.loader.annotation.AnnotationIocLoader", "demo.nutz"}) @SetupBy(NutzSetup.class) public class MainModule { }
由于使用了两种注入的配置方式，因此此处使用了Ioc复合加载器ComboIocProvider。
1）使用"*org.nutz.ioc.loader.json.JsonLoader", "ioc/dao.js"加载JS文件，dao.js中配置了数据源对象和dao对象的注入，貌似听“Wendal-兽”说无法用注解来配置，只能用配置文件。
2）使用"*org.nutz.ioc.loader.annotation.AnnotationIocLoader", "demo.nutz"来自动加载包demo.nutz或其子包中被@IocBean注解过的类。
3）@Modules(value = ArticleInfoAction.class, scanPackage = true) 用来告诉Nutz自动去扫描ArticleInfoAction.class所在包的所有类，如果有类包括了一个以上的入口函数将被认为是模块类。
3、“ioc/dao.js”文件
/*
* 本配置文件声明了整个应用的数据库连接部分。
*/
var ioc = {
/*
* 数据库连接池
*/
dataSource : {
type : "com.mchange.v2.c3p0.ComboPooledDataSource",
fields : {
driverClass : "com.mysql.jdbc.Driver",
jdbcUrl : "jdbc:mysql://127.0.0.1/nutzdemo",
user : "root",
password : "123456"
}
},
/*
* 这个配置很好理解， args 表示这个对象构造函数的参数。显然，下面的注入方式将调用 new NutDao(dataSource)
*/
dao : {
type : "org.nutz.dao.impl.NutDao",
args : [ {
refer : "dataSource"
} ]
}
};
4、Model类DepartmentInfo.java
package demo.nutz.model;
import org.nutz.dao.entity.annotation.Id;
import org.nutz.dao.entity.annotation.Table;
@Table("DepartmentInfo")
public class DepartmentInfo {
@Id //指明主键是整型且默认为自增1
private Integer departmentInfoId;
private String departmentName;
/*此处省略Getter和Setter*/
}
5、Service层DepartmentInfoService.java
package demo.nutz.service; import org.nutz.dao.Dao; import org.nutz.ioc.loader.annotation.IocBean; import org.nutz.service.IdEntityService; import demo.nutz.model.DepartmentInfo; /** * 部门信息-业务层 * * @author gevin([email protected]) * */ @IocBean(args = { "refer:dao" }) // 使用@IocBean注解，无需通过配置文件配置，此处必须带上构造函数的参数所引用的对象 public class DepartmentInfoService extends IdEntityService<DepartmentInfo> { public DepartmentInfoService() { super(); } public DepartmentInfoService(Dao dao, Class<DepartmentInfo> entityType) { super(dao, entityType); } public DepartmentInfoService(Dao dao) { super(dao); } }
6、为了方便以后扩展或进行一些全局的操作，自己定义了一个BaseAction.java，在此类中可定义各种公用变量或函数
package demo.nutz.base; import java.util.Map; /** * Action基类，在此类中可定义各种公用变量或函数 * * @author gevin([email protected]) * */ public class BaseAction { // 定义操作结果字符串 protected static String ADD_SUCCESS = "addSuccess"; protected static String ADD_FAILURE = "addFailure"; protected static String EDIT_SUCCESS = "editSuccess"; protected static String EDIT_FAILURE = "editFailure"; protected static String DEL_SUCCESS = "delSuccess"; protected static String DEL_FAILURE = "delFailure"; protected static String GET_SUCCESS = "getSuccess"; protected static String GET_FAILURE = "getFailure"; protected static String OP_SUCCESS = "opSuccess"; protected static String OP_FAILURE = "opFailure"; /** * 返回错误结果 * * @param errorMsg * @param map * @return */ public Map<String, Object> failure(String errorMsg, Map<String, Object> map) { map.put("msg", errorMsg); return map; } /** * 返回成功结果 * * @param successMsg * @param map * @return */ public Map<String, Object> success(String successMsg, Map<String, Object> map) { map.put("msg", successMsg); return map; } /** * 返回成功结果 * * @param successMsg * @param map * @return */ public Map<String, Object> success(Map<String, Object> map) { map.put("msg", null); return map; } }
7、控制CRUD操作的Action类DepartmentInfoAction.java
package demo.nutz.action; import java.util.HashMap; import java.util.List; import java.util.Map; import javax.servlet.http.HttpServletRequest; import org.nutz.dao.Cnd; import org.nutz.ioc.loader.annotation.Inject; import org.nutz.ioc.loader.annotation.IocBean; import org.nutz.mvc.annotation.At; import org.nutz.mvc.annotation.Ok; import org.nutz.mvc.annotation.Param; import demo.nutz.base.BaseAction; import demo.nutz.model.DepartmentInfo; import demo.nutz.service.DepartmentInfoService; /** * 部门信息模块 * * @author gevin([email protected]) * */ @IocBean @At("/departmentinfo") public class DepartmentInfoAction extends BaseAction { @Inject // 通过注解@Inject注入对象 private DepartmentInfoService departmentInfoService; /** * 跳转到添加页面 * * @return */ @At("/addDepartmentInfo") @Ok("jsp:${obj.msg == null ? '/departmentinfo/addDepartmentInfo' : '/departmentinfo/showMessage'}") // 在@Ok中使用NutzEL表达式 public Map<String, Object> addDepartmentInfo() { Map<String, Object> map = new HashMap<String, Object>(); try { return success(map); } catch (Exception e) { e.printStackTrace(); return failure(GET_FAILURE, map); } } /** * 添加成功 * * @param di * @return */ @At("/addDepartmentInfoOk") @Ok("jsp:/departmentinfo/showMessage") public Map<String, Object> addDepartmentInfoOk(@Param("..") DepartmentInfo di) { Map<String, Object> map = new HashMap<String, Object>(); try { if (di == null) return failure(GET_FAILURE, map); // 添加成功 if (this.departmentInfoService.dao().insert(di) == null) return failure(ADD_FAILURE, map); return success(ADD_SUCCESS, map); } catch (Exception e) { e.printStackTrace(); map.put("msg", "getFailure"); return map; } } /** * 跳转到修改页面 * * @param departmentInfoId * @return */ @At("/editDepartmentInfo") @Ok("jsp:${obj.msg == null ? '/departmentinfo/editDepartmentInfo' : '/departmentinfo/showMessage'}") public Map<String, Object> editDepartmentInfo(@Param("departmentInfoId") Integer departmentInfoId) { Map<String, Object> map = new HashMap<String, Object>(); try { if (departmentInfoId == null) return failure(GET_FAILURE, map); // 获取对象 DepartmentInfo di = this.departmentInfoService.fetch(departmentInfoId); if (di == null) return failure(GET_FAILURE, map); map.put("departmentInfo", di); return success(map); } catch (Exception e) { e.printStackTrace(); return failure(GET_FAILURE, map); } } /** * 修改成功 * * @param di * @return */ @At("/editDepartmentInfoOk") @Ok("jsp:/departmentinfo/showMessage") public Map<String, Object> editDepartmentInfoOk(@Param("..") DepartmentInfo di) { Map<String, Object> map = new HashMap<String, Object>(); try { if (di == null) return failure(GET_FAILURE, map); // 修改对象 if (this.departmentInfoService.dao().update(di) == 0) return failure(EDIT_FAILURE, map); return success(EDIT_SUCCESS, map); } catch (Exception e) { e.printStackTrace(); return failure(GET_FAILURE, map); } } /** * 删除成功 * * @param di * @param request * @return */ @At("/delDepartmentInfoOk") @Ok("jsp:/departmentinfo/showMessage") public Map<String, Object> delDepartmentInfoOk(@Param("..") DepartmentInfo di, HttpServletRequest request) { Map<String, Object> map = new HashMap<String, Object>(); try { if (di == null) return failure(GET_FAILURE, map); // 删除对象 if (this.departmentInfoService.dao().delete(di) == 0) return failure(DEL_FAILURE, map); return success(DEL_SUCCESS, map); } catch (Exception e) { e.printStackTrace(); return failure(GET_FAILURE, map); } } /** * 显示列表 * * @return */ @At("/showDepartmentInfoList") @Ok("jsp:/departmentinfo/showDepartmentInfoList") public Map<String, Object> showDepartmentInfoList() { Map<String, Object> map = new HashMap<String, Object>(); try { List<DepartmentInfo> diList = this.departmentInfoService.query(Cnd.orderBy().asc("departmentName"), null); map.put("departmentInfoList", diList); return success(map); } catch (Exception e) { e.printStackTrace(); return failure(GET_FAILURE, map); } } }
8、JSP视图文件
showArticleInfoList.shtml
<%@ page contentType="text/html; charset=utf-8" language="java" import="java.sql.*" errorPage="" %>
<%@ include file="../include/taglibs.jsp" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>部门信息列表</title>
<link href="../css/web.css" rel="stylesheet" type="text/css" />
</head>
<body>
<br />
<table width="500" border="0" align="center" cellpadding="0" cellspacing="0">
<tr>
<td height="35"><label>
<input type="button" name="add" id="add" value="添加部门信息" onclick="window.location='addDepartmentInfo.shtml'" />
</label></td>
</tr>
</table>
<table width="500" border="0" align="center" cellpadding="1" cellspacing="1" class="TableOut">
<tr>
<td height="30" colspan="3" align="center" class="TableTop">部门信息列表</td>
</tr>
<tr class="TableInWhite">
<td width="104" height="30" align="center">序号</td>
<td width="272" align="center">部门名称</td>
<td width="124" align="center">操作</td>
</tr>
<c:forEach var = "di" items = "${obj.departmentInfoList}" varStatus="status">
<tr class="TableInWhite">
<td height="30" align="center">${status.count}</td>
<td align="center">${di.departmentName}</td>
<td align="center">[<a href="editDepartmentInfo.shtml?departmentInfoId=${di.departmentInfoId}">修改</a>] [<a href="delDepartmentInfoOk.shtml?departmentInfoId=${di.departmentInfoId}" onclick="return confirm('是否真的要删除此部门？')">删除</a>]</td>
</tr>
</c:forEach>
</table>
</body>
</html>
addDepartmentInfo.jsp
<%@ page contentType="text/html; charset=utf-8" language="java" import="java.sql.*" errorPage="" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>添加部门信息</title>
<link href="../css/web.css" rel="stylesheet" type="text/css" />
</head>
<body>
<br />
<br />
<form id="form1" name="form1" method="post" action="addDepartmentInfoOk.shtml">
<table width="400" border="0" align="center" cellpadding="1" cellspacing="1" class="TableOut">
<tr>
<td height="30" colspan="2" align="center" class="TableTop">添加部门信息</td>
</tr>
<tr class="TableInWhite">
<td width="91" height="30" align="center">部门名称：</td>
<td width="302"><label>
<input type="text" name="departmentName" id="departmentName" />
</label></td>
</tr>
<tr class="TableInWhite">
<td height="30" colspan="2" align="center"><label>
<input type="submit" name="add" id="add" value=" 提 交 " />
<input type="reset" name="reset" id="reset" value=" 重 置 " />
</label></td>
</tr>
</table>
</form>
</body>
</html>
editDepartmentInfo.jsp
<%@ page contentType="text/html; charset=utf-8" language="java" import="java.sql.*" errorPage="" %>
<%@ include file="../include/taglibs.jsp" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>修改部门信息</title>
<link href="../css/web.css" rel="stylesheet" type="text/css" />
</head>
<body>
<br />
<br />
<c:set var="di" value="${obj.departmentInfo}" />
<form id="form1" name="form1" method="post" action="editDepartmentInfoOk.shtml">
<input type="hidden" id="departmentInfoId" name="departmentInfoId" value="${di.departmentInfoId}" />
<table width="400" border="0" align="center" cellpadding="1" cellspacing="1" class="TableOut">
<tr>
<td height="30" colspan="2" align="center" class="TableTop">修改部门信息</td>
</tr>
<tr class="TableInWhite">
<td width="91" height="30" align="center">部门名称：</td>
<td width="302"><label>
<input type="text" name="departmentName" id="departmentName" value="${di.departmentName}" />
</label></td>
</tr>
<tr class="TableInWhite">
<td height="30" colspan="2" align="center"><label>
<input type="submit" name="add" id="add" value=" 提 交 " />
<input type="reset" name="reset" id="reset" value=" 返 回" onclick="history.back()" />
</label></td>
</tr>
</table>
</form>
</body>
</html>
信息提示文件：showMessage.jsp
<%@ page contentType="text/html; charset=utf-8" language="java" import="java.sql.*" errorPage="" %>
<%@ include file="../include/taglibs.jsp" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>信息提示</title>
<script type="text/javascript" src="../js/common.js"></script>
</head>
<body>
<c:set var="msg" value="${obj.msg}" />
<c:choose>
<c:when test="${msg=='addSuccess'}">
<script type="text/javascript">alertMsg("添加成功.","showDepartmentInfoList.shtml");</script>
</c:when>
<c:when test="${msg=='editSuccess'}">
<script type="text/javascript">alertMsg("修改成功.","showDepartmentInfoList.shtml");</script>
</c:when>
<c:when test="${msg=='delSuccess'}">
<script type="text/javascript">alertMsg("删除成功.","showDepartmentInfoList.shtml");</script>
</c:when>
<c:when test="${msg=='addFailure'}">
<script type="text/javascript">alertMsg("添加失败,请返回重新操作.","back");</script>
</c:when>
<c:when test="${msg=='editFailure'}">
<script type="text/javascript">alertMsg("修改失败,请返回重新操作.","back");</script>
</c:when>
<c:when test="${msg=='delFailure'}">
<script type="text/javascript">alertMsg("删除失败,请返回重新操作.","back");</script>
</c:when>
<c:when test="${msg=='getFailure'}">
<script type="text/javascript">alertMsg("获取失败,请返回重新操作.","back");</script>
</c:when>
<c:when test="${msg=='opFailure'}">
<script type="text/javascript">alertMsg("操作失败,请返回重新操作.","back");</script>
</c:when>
</c:choose>
</body>
</html>
9、OK了，所有文件都配置好了，我们重启Tomcat，访问以下测试地址。
http://127.0.0.1:204/UserManageSystem/departmentinfo/showDepartmentInfoList.shtml
效果图：
![使用Nutz[1.b.38]对数据库表的CRUD操作](http://img.e-com-net.com/image/product/5ccb90569c404ef984f062c0c8740b02.jpg)
![使用Nutz[1.b.38]对数据库表的CRUD操作](http://img.e-com-net.com/image/product/86adb89b68c04be2bd98dc4b2b2971c2.jpg)
![使用Nutz[1.b.38]对数据库表的CRUD操作](http://img.e-com-net.com/image/product/8e65bbea16124fdeab2c4a9dad3bf8d9.jpg)
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第二次写学习心得，还是觉得太花时间了，哈哈！！啥时候才能养成写BLOG的习惯呢。。。。 时间啊！！
最后，当然是本例子的完整代码了。。。希望对Nutz的初学者有用！让更多人使用Nutz，哈哈！！