Spring boot实例

Posted 2020-10-11 143401010116

代码下载http://pan.baidu.com/s/1c2aXLkc 密码：2joh

1、代码包规划

  

Application主类

 1 package com.smart;
 2 import org.springframework.boot.SpringApplication;
 3 import org.springframework.boot.autoconfigure.SpringBootApplication;
 4 import org.springframework.boot.builder.SpringApplicationBuilder;
 5 import org.springframework.boot.context.web.SpringBootServletInitializer;
 6 import org.springframework.context.annotation.Bean;
 7 import org.springframework.jdbc.datasource.DataSourceTransactionManager;
 8 import org.springframework.transaction.PlatformTransactionManager;
 9 import org.springframework.transaction.annotation.EnableTransactionManagement;
10 import org.springframework.web.WebApplicationInitializer;
11 
12 import javax.sql.DataSource;
13 
14 //@Configuration
15 //@ComponentScan
16 //@EnableAutoConfiguration
17 @SpringBootApplication
18 @EnableTransactionManagement
19 public class Application  extends SpringBootServletInitializer implements WebApplicationInitializer {
20     @Bean
21     public PlatformTransactionManager txManager(DataSource dataSource) {
22         return new DataSourceTransactionManager(dataSource);
23     }
24     protected SpringApplicationBuilder configure(SpringApplicationBuilder application) {
25         return application.sources(Application.class);
26     }
27     
28     public static void main(String[] args) throws Exception {
29         SpringApplication.run(Application.class, args);
30     }
31 }

2 、持久层

UserDao类

findUserByUserName():根据用户名获取对象

updateLoginInfo():更新用户积分，最后登录IP及最后登录时间

 1 package com.smart.dao;
 2 import com.smart.domain.User;
 3 import org.springframework.beans.factory.annotation.Autowired;
 4 import org.springframework.jdbc.core.JdbcTemplate;
 5 import org.springframework.jdbc.core.RowCallbackHandler;
 6 import org.springframework.stereotype.Repository;
 7 import java.sql.ResultSet;
 8 import java.sql.SQLException;
 9 @Repository
10 public class UserDao {
11     private JdbcTemplate jdbcTemplate;
12 
13     private final static String MATCH_COUNT_SQL = " SELECT count(*) FROM t_user  " +
14             " WHERE user_name =? and password=? ";
15     private final static String UPDATE_LOGIN_INFO_SQL = " UPDATE t_user SET " +
16             " last_visit=?,last_ip=?,credits=?  WHERE user_id =?";
17 
18     public int getMatchCount(String userName, String password) {
19 
20         return jdbcTemplate.queryForObject(MATCH_COUNT_SQL, new Object[]{userName, password}, Integer.class);
21     }
22 
23     public User findUserByUserName(final String userName) {
24         String sqlStr = " SELECT user_id,user_name,credits "
25                 + " FROM t_user WHERE user_name =? ";
26         final User user = new User();
27         jdbcTemplate.query(sqlStr, new Object[]{userName},
28                 new RowCallbackHandler() {
29                     public void processRow(ResultSet rs) throws SQLException {
30                         user.setUserId(rs.getInt("user_id"));
31                         user.setUserName(userName);
32                         user.setCredits(rs.getInt("credits"));
33                     }
34                 });
35         return user;
36     }
37 
38     public void updateLoginInfo(User user) {
39         jdbcTemplate.update(UPDATE_LOGIN_INFO_SQL, new Object[]{user.getLastVisit(),
40                 user.getLastIp(), user.getCredits(), user.getUserId()});
41     }
42     @Autowired
43     public void setJdbcTemplate(JdbcTemplate jdbcTemplate) {
44         this.jdbcTemplate = jdbcTemplate;
45     }
46 }

LoginLogDao类

 1 package com.smart.dao;
 2 
 3 import com.smart.domain.LoginLog;
 4 import org.springframework.beans.factory.annotation.Autowired;
 5 import org.springframework.jdbc.core.JdbcTemplate;
 6 import org.springframework.stereotype.Repository;
 7 
 8 @Repository
 9 public class LoginLogDao {
10     @Autowired
11     private JdbcTemplate jdbcTemplate;
12 
13     //保存登陆日志SQL
14     private final static String INSERT_LOGIN_LOG_SQL= "INSERT INTO t_login_log(user_id,ip,login_datetime) VALUES(?,?,?)";
15     
16     public void insertLoginLog(LoginLog loginLog) {
17         Object[] args = { loginLog.getUserId(), loginLog.getIp(),
18                           loginLog.getLoginDate() };
19         jdbcTemplate.update(INSERT_LOGIN_LOG_SQL, args);
20     }
21 }

3、业务层

UserService类

 1 package com.smart.service;
 2 
 3 import com.smart.dao.LoginLogDao;
 4 import com.smart.dao.UserDao;
 5 import com.smart.domain.LoginLog;
 6 import com.smart.domain.User;
 7 import org.springframework.beans.factory.annotation.Autowired;
 8 import org.springframework.stereotype.Service;
 9 import org.springframework.transaction.annotation.Transactional;
10 
11 @Service
12 public class UserService {
13 
14     private UserDao userDao;
15 
16     private LoginLogDao loginLogDao;
17 
18 
19     public boolean hasMatchUser(String userName, String password) {
20         int matchCount =userDao.getMatchCount(userName, password);
21         return matchCount > 0;
22     }
23     
24     public User findUserByUserName(String userName) {
25         return userDao.findUserByUserName(userName);
26     }
27 
28     @Transactional
29     public void loginSuccess(User user) {
30         user.setCredits( 5 + user.getCredits());
31         LoginLog loginLog = new LoginLog();
32         loginLog.setUserId(user.getUserId());
33         loginLog.setIp(user.getLastIp());
34         loginLog.setLoginDate(user.getLastVisit());
35         userDao.updateLoginInfo(user);
36         loginLogDao.insertLoginLog(loginLog);
37     }
38 
39     @Autowired
40     public void setUserDao(UserDao userDao) {
41         this.userDao = userDao;
42     }
43 
44     @Autowired
45     public void setLoginLogDao(LoginLogDao loginLogDao) {
46         this.loginLogDao = loginLogDao;
47     }
48 }

4、展现层

处理请求:

LoginCommand

 1 package com.smart.web;
 2 
 3 public class LoginCommand {
 4     private String userName;
 5 
 6     private String password;
 7 
 8     public String getPassword() {
 9         return password;
10     }
11 
12     public void setPassword(String password) {
13         this.password = password;
14     }
15 
16     public String getUserName() {
17         return userName;
18     }
19 
20     public void setUserName(String userName) {
21         this.userName = userName;
22     }
23 }

LoginController

 1 package com.smart.web;
 2 
 3 import com.smart.domain.User;
 4 import com.smart.service.UserService;
 5 import org.springframework.beans.factory.annotation.Autowired;
 6 import org.springframework.web.bind.annotation.RequestMapping;
 7 import org.springframework.web.bind.annotation.RestController;
 8 import org.springframework.web.servlet.ModelAndView;
 9 import javax.servlet.http.HttpServletRequest;
10 import java.util.Date;
11 
12 @RestController
13 public class LoginController{
14     private UserService userService;
15     
16     @RequestMapping(value = {"/","/index.html"})
17     public ModelAndView loginPage(){
18         return new ModelAndView("login");
19     }
20     
21     @RequestMapping(value = "/loginCheck.html")
22     public ModelAndView loginCheck(HttpServletRequest request,LoginCommand loginCommand){
23         boolean isValidUser =  userService.hasMatchUser(loginCommand.getUserName(),
24                                         loginCommand.getPassword());
25         if (!isValidUser) {
26             return new ModelAndView("login", "error", "用户名或密码错误。");
27         } else {
28             User user = userService.findUserByUserName(loginCommand
29                     .getUserName());
30             user.setLastIp(request.getLocalAddr());
31             user.setLastVisit(new Date());
32             userService.loginSuccess(user);
33             request.getSession().setAttribute("user", user);
34             return new ModelAndView("main");
35         }
36     }
37 
38     @Autowired
39     public void setUserService(UserService userService) {
40         this.userService = userService;
41     }
42 }

pom.xml配置

 1 <?xml version="1.0" encoding="UTF-8"?>
 2 <project xmlns="http://maven.apache.org/POM/4.0.0"
 3          xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
 4          xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
 5 
 6     <parent>
 7         <groupId>org.springframework.boot</groupId>
 8         <artifactId>spring-boot-starter-parent</artifactId>
 9         <version>1.3.3.RELEASE</version>
10     </parent>
11     <modelVersion>4.0.0</modelVersion>
12     <artifactId>chapter3</artifactId>
13     <name>Spring4.x</name>
14     <packaging>war</packaging>
15     <dependencies>
16         <dependency>
17             <groupId>org.springframework.boot</groupId>
18             <artifactId>spring-boot-starter-web</artifactId>
19         </dependency>
20         <dependency>
21             <groupId>org.springframework.boot</groupId>
22             <artifactId>spring-boot-starter-jdbc</artifactId>
23         </dependency>
24         <dependency>
25             <groupId>org.springframework.boot</groupId>
26             <artifactId>spring-boot-starter-actuator</artifactId>
27         </dependency>
28         <dependency>
29             <groupId>mysql</groupId>
30             <artifactId>mysql-connector-java</artifactId>
31             <version>${mysql.version}</version>
32         </dependency>
33         <dependency>
34             <groupId>org.apache.tomcat.embed</groupId>
35             <artifactId>tomcat-embed-jasper</artifactId>
36             <scope>provided</scope>
37         </dependency>
38         <dependency>
39             <groupId>javax.servlet</groupId>
40             <artifactId>jstl</artifactId>
41         </dependency>
42         <dependency>
43             <groupId>org.springframework.boot</groupId>
44             <artifactId>spring-boot-starter-test</artifactId>
45             <scope>test</scope>
46         </dependency>
47     </dependencies>
48     <build>
49         <plugins>
50             <plugin>
51                 <groupId>org.springframework.boot</groupId>
52                 <artifactId>spring-boot-maven-plugin</artifactId>
53             </plugin>
54             <plugin>
55                 <groupId>org.apache.maven.plugins</groupId>
56                 <artifactId>maven-surefire-plugin</artifactId>
57                 <configuration>
58                     <useSystemClassLoader>false</useSystemClassLoader>
59                 </configuration>
60             </plugin>
61         </plugins>
62     </build>
63 </project>

 

Springboot Controller返回值类型

1、返回页面

@Controller
public class UserController {
    @RequestMapping("/logout")
    public String logout() {
        SecurityUtils.getSubject().logout();
        return "login1";  //返回对应的名的页面
    }
}

2、返回返回json格式的数据。

@Controller
public class UserController {

    @RequestMapping("/logout")
    @ResponseBody  //加入@ResponseBody 会把返回值写入的http相应body里，详情请自行百度

    public String logout() {
        SecurityUtils.getSubject().logout();
        return "login1";
    }

}

3、@RestController注解相当于@ResponseBody ＋ @Controller合在一起的作用