1. 鏈接數據庫在context.xml中添加代碼：java
<Context> <Resource name="jdbc/TerasolunaSampleDataSource" type="javax.sql.DataSource" driverClassName="com.mysql.jdbc.Driver" username="root" password="root" url="jdbc:mysql://localhost:3306/test" //test爲數據庫名 useUnicode="true" characterEncoding="UTF-8" maxIdle="2" maxWait="5000" maxActive="4"/> </Context>
2. 以UserID爲查詢條件查詢數據庫中的數據：mysql
在HelloWorld.jsp中
<form action="name" method="post">
<input name="userID" type="text">
<button type="submit" name="login">search</button>
由上述代碼中action="name"的路徑往前
在HelloWorldControlller.java中
@RequestMapping(value = "/name", method = RequestMethod.POST)
public String nameLogin(UserBean UserBean,Model model) {
UserBean result=helloWorldService.searchname(UserBean); //找到searchname方法在HelloWorldService.java中，執行那個方法，將結果返回到UserBean中
model.addAttribute("UserBean",result);
return "login"; //最後返回到login.jsp頁面顯示結果
}
public UserBean searchname(UserBean nn) {
UserBean result = queryDao.executeForObject("User.selectname", nn, UserBean.class);
return result;} //由User.selectname找到SQL文
在UserSqlMap.xml中：
<select id="selectname"
parameterClass="cn.training.controller.UserBean"
resultClass="cn.training.controller.UserBean">
SELECT UserID as userID,username FROM user WHERE UserID = #userID#
</select>3. 在上述查詢最後返回到login頁面的基礎上添加一個更新按鈕，保存原有的id不變，修改ID所對應的name，單擊更新按鈕後將改後的值存入數據庫中。而後用類似的思路建立更新按鈕的事件
<update id="updatename"
parameterClass="cn.training.controller.UserBean">
UPDATE user SET username=#username# WHERE UserID = #userID#
</update>
public int updateUser(UserBean gg){
return updateDao.execute("User.updatename", gg);
}
@RequestMapping(value = "/update", method = RequestMethod.POST)
public String Login(UserBean UserBean,Model model) {
if(helloWorldService.updateUser(UserBean)!=0)
return "success";
else
return"login";
}4. 往數據庫中的表格添加一條記錄，在輸入框中輸入要添加的數據，傳值到UserBean，而後添加到數據庫中
@RequestMapping(value = "/aa", method = RequestMethod.POST)
public String aaLogin(UserBean UserBean,Model model) {
if(helloWorldService.insertUser(UserBean)!=0)
return "success";
else
return"helloWorld";
}
public int insertUser(UserBean mm){
return updateDao.execute("User.insertUser", mm);
}
<insert id="insertUser"
parameterClass="cn.training.controller.UserBean">
INSERT INTO user VALUES(#userID#,#username#)
</insert>5. 查詢數據庫表格中全部的記錄，以表格的形式顯示，並給ID加一個連接，轉到delete事件，刪除以ID爲條件的記錄，並顯示剩餘的記錄，連接方式爲
GET
@RequestMapping(value = "/list", method = RequestMethod.POST)
public String listLogin(UserBean UserBean,Model model) {
List<UserBean> result=helloWorldService.listUser(UserBean);
model.addAttribute("list",result);
return "list";
}
@RequestMapping(value = "/delete", method = RequestMethod.GET)
public String delete(UserBean UserBean,Model model) {
int result1=helloWorldService.deleteUser(UserBean);
model.addAttribute("list",result1);
List<UserBean> result=helloWorldService.listUser(UserBean);
model.addAttribute("list",result);
return "list";
}
public List<UserBean> listUser(UserBean ls) {
List<UserBean> result = queryDao.executeForObjectList("User.selectlistUser", ls);
return result;
}
public int deleteUser(UserBean de) {
return updateDao.execute("User.deleteUser", de);
}
<select id="selectlistUser"
parameterClass="cn.training.controller.UserBean"
resultClass="cn.training.controller.UserBean">
SELECT UserID as userID,username FROM user
</select>
<delete id="deleteUser"
parameterClass="cn.training.controller.UserBean">
DELETE FROM user WHERE UserID = #userID#
</delete>
<%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c"%>
<body>
<h2>用戶信息</h2>
<table >
<tr>
<td>id</td>
<td>name</td>
</tr>
<c:forEach items="${list}" var="user" varStatus="status"> //c:forEach 循環使顯示錶中全部記錄
<tr>
<td><a href="delete?userID=${user.userID}">${user.userID}</a></td> //連接爲get方式
<td>${user.username}</td>
</tr>
</c:forEach>