Spring 使用配置完成从前台页面输入到查询数据库的例子

跟着下面的例子走吧

1 Spring数据源配置

<bean id="dataSource" class="org.apache.commons.dbcp.BasicDataSource" destroy-method="close">
<property name="driverClassName" value="com.mysql.jdbc.Driver"></property>
<property name="url" value="jdbc:mysql://127.0.0.1:3306/daoxiang"></property>
<property name="username" value="root"></property>
<property name="password" value="root"></property>
</bean>

2 定义Spring JDBC模板类bean

<bean id="jdbcTemplate" class="org.springframework.jdbc.core.JdbcTemplate">
<property name="dataSource" ref="dataSource"></property>
</bean>

3 页面输入

<form action="Login" method="post">
<Table>
<Tr>
<td>用户名:</Td>
<td><input type="text" name="username" /></Td>
</Tr>
<Tr>
<td>密码:</Td>
<td><input type="password" name="password" /></Td>
</Tr>
<Tr>
<td><input type="submit" name="submit" value="登录"/></Td>
<td><input type="reset" name="reset" value="重置"/></Td>
</Tr>
</Table>
</form>

4 Struts 接收

<action name="Login" class="com.struts2.action.LoginAction">
<result name="success">/welcome.jsp</result>
<result name="error">/error.jsp</result>
</action>

5 相应的Dao接口

public interface YuangongDao{
/**
* Description:验证用户登陆
* @param Yuangong 用户
* @return Yuangong
*/
public boolean checkYuangong(String wName,String wPassword);
}

6 Dao实现类

public class YuangongDaoImpl implements YuangongDao{
private JdbcTemplate jdbcTemplate;
public boolean checkYuangong(String wName, String wPassord) {
System.out.println(wPassord);
String sql="select count(*) from yuangong where wName=? and wPassord=? ";
int count = jdbcTemplate.queryForInt(sql,new Object[]{wName,wPassord});
return count>0;
}
public void setJdbcTemplate(JdbcTemplate jdbcTemplate) {
this.jdbcTemplate = jdbcTemplate;
}
}

7 Spring配置Dao

<bean id="yuangongDao" class="com.struts2.daoImpl.YuangongDaoImpl">
<property name="jdbcTemplate" ref="jdbcTemplate" ></property>
</bean>

8 Service

public class LoginService {
private YuangongDao yuangongDao;
public boolean login(Yuangong yuangong) throws Exception{
boolean flag=false;
if(yuangongDao.checkYuangong(yuangong.getwName(), yuangong.getwPassord())){
flag=true;
}
return flag;
}
public YuangongDao getYuangongDao() {
return yuangongDao;
}
public void setYuangongDao(YuangongDao yuangongDao) {
this.yuangongDao = yuangongDao;
}
}

9 Spring 配置Service

<bean id="loginService" class="com.struts2.service.LoginService">
<property name="yuangongDao" ref="yuangongDao"></property>
</bean>

10 Action

public class LoginAction extends ActionSupport implements Action{
private static final long serialVersionUID  =   1L ;
private String username;
private String password;
private LoginService loginService;
@Override
public void validate(){
}
public String execute() throws Exception{
Yuangong yuangong=new Yuangong();
yuangong.setwName(username);
yuangong.setwPassord(password);
boolean result=this.loginService.login(yuangong);
if(result){
return this.SUCCESS;
}else{
return this.ERROR ;
}
}
public String getUsername() {
return username;
}
public void setUsername(String username) {
this.username = username;
}
public String getPassword() {
return password;
}
public void setPassword(String password) {
this.password = password;
}
public LoginService getLoginService() {
return loginService;
}
public void setLoginService(LoginService loginService) {
this.loginService = loginService;
}
}

完成