本案例使用thymeleaf，与springboot配置使用。thymeleaf是一种模板语言，可以动态或者静态显示文本内容。
1 、项目结构
2、构建springboot项目
通过idea的new project构建springboot项目，如果mvn比较慢，建议更改maven目录下的conf中的setting.xml，找到mirrors,在里面加入这段话
<id>nexus-aliyun</id>
<mirrorOf>*</mirrorOf>
<name>Nexus aliyun</name>
<url>http://maven.aliyun.com/nexus/content/groups/public</url>
3、添加thymeleaf配置
pom.xml中插入
、
在application.properties中添加
#thymelea模板配置
spring.thymeleaf.prefix=classpath:/templates/
spring.thymeleaf.suffix=.html
spring.thymeleaf.mode=HTML5
spring.thymeleaf.encoding=UTF-8
#热部署文件，页面不产生缓存，及时更新
spring.thymeleaf.cache=false
spring.resources.chain.strategy.content.enabled=true
spring.resources.chain.strategy.content.paths=/**
4、先运行项目，防止出现问题，启动项目。
先建个类测试
启动项目后，在浏览器中输入http://127.0.0.1:8080/hello，出现 wanshanghao
5 现在开始写mvc
package com.example.demo.controller; /** * Created by Administrator on 2018/4/24 0024. */
import com.example.demo.domain.User; import com.example.demo.repository.UserRepository; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.ui.Model; import org.springframework.web.bind.annotation.GetMapping; import org.springframework.web.bind.annotation.PathVariable; import org.springframework.web.bind.annotation.PostMapping; import org.springframework.web.bind.annotation.RequestMapping; import org.springframework.web.bind.annotation.RestController; import org.springframework.web.servlet.ModelAndView; import java.util.List; /** * 用户控制器.
* */ @RestController
@RequestMapping(“/users”) public class UserController {
@Autowired private UserRepository userRepository; /\*\* \* 从 用户存储库 获取用户列表
\* @return
\*/
private List<User> getUserlist() { return userRepository.listUser();
} /\*\* \* 查询所用用户
\* @return
\*/ @GetMapping public ModelAndView list(Model model) {
model.addAttribute("userList", getUserlist());
model.addAttribute("title", "用户管理"); return new ModelAndView("users/list", "userModel", model);
} /\*\* \* 根据id查询用户
\* @return
\*/ @GetMapping("{id}") public ModelAndView view(@PathVariable("id") Long id, Model model) {
User user \= userRepository.getUserById(id);
model.addAttribute("user", user);
model.addAttribute("title", "查看用户"); return new ModelAndView("users/view", "userModel", model);
} /\*\* \* 获取 form 表单页面
\* @return
\*/ @GetMapping("/form") public ModelAndView createForm(Model model) {
model.addAttribute("user", new User());
model.addAttribute("title", "创建用户"); return new ModelAndView("users/form", "userModel", model);
} /\*\* \* 新建用户
\* @param user
\* @return
\*/ @PostMapping public ModelAndView create(User user) {
user \= userRepository.saveOrUpateUser(user); return new ModelAndView("redirect:/users");
} /\*\* \* 删除用户
\* @param id
\* @return
\*/ @GetMapping(value \= "delete/{id}") public ModelAndView delete(@PathVariable("id") Long id, Model model) {
userRepository.deleteUser(id);
model.addAttribute("userList", getUserlist());
model.addAttribute("title", "删除用户"); return new ModelAndView("users/list", "userModel", model);
} /\*\* \* 修改用户 \*/ @GetMapping(value \= "modify/{id}") public ModelAndView modifyForm(@PathVariable("id") Long id, Model model) {
User user \= userRepository.getUserById(id);
model.addAttribute("user", user);
model.addAttribute("title", "修改用户"); return new ModelAndView("users/form", "userModel", model);
}
}
package com.example.demo.domain; /** * Created by nicknailo on 2018/4/24 0024. */
import javax.xml.bind.annotation.XmlRootElement; /** * User. */ @XmlRootElement // mediatype 转为xml
public class User { private long id; // 用户的唯一标识
private String name; private int age; public User() {
} public User(String name, int age) { this.name = name; this.age = age;
} public long getId() { return id;
} public void setId(long id) { this.id = id;
} public String getName() { return name;
} public void setName(String name) { this.name = name;
} public int getAge() { return age;
} public void setAge(int age) { this.age = age;
}
}
package com.example.demo.repository; /** * Created by nicknailo on 2018/4/24 0024. */
import com.example.demo.domain.User; import java.util.List; /** * 用户仓库. */
public interface UserRepository { /** * 新增或者修改用户
* @param user
* @return
*/ User saveOrUpateUser(User user); /** * 删除用户
* @param id */
void deleteUser(Long id); /** * 根据用户id获取用户
* @param id
* @return
*/ User getUserById(Long id); /** * 获取所有用户的列表
* @return
*/ List
}
package com.example.demo.repository; import java.util.ArrayList; import java.util.List; import java.util.concurrent.ConcurrentHashMap; import java.util.concurrent.ConcurrentMap; import java.util.concurrent.atomic.AtomicLong; import com.example.demo.domain.User; import org.springframework.stereotype.Repository; /** * 用户资源库. */ @Repository public class UserRepositoryImpl implements UserRepository { private static AtomicLong counter = new AtomicLong(); private final ConcurrentMap<Long, User> userMap = new ConcurrentHashMap<Long, User>(); public UserRepositoryImpl(){
User user = new User();
user.setAge(30);
user.setName(“大西瓜”); this.saveOrUpateUser(user);
} /* (non-Javadoc)
* @see com.waylau.spring.boot.thymeleaf.repository.UserRepository#saveUser(com.waylau.spring.boot.thymeleaf.vo.UserVO) */ @Override public User saveOrUpateUser(User user) {
Long id = user.getId(); if (id <= 0) {
id = counter.incrementAndGet();
user.setId(id);
} this.userMap.put(id, user); return user;
} /* (non-Javadoc)
* @see com.waylau.spring.boot.thymeleaf.repository.UserRepository#deleteUser(java.lang.Long) */ @Override public void deleteUser(Long id) { this.userMap.remove(id);
} /* (non-Javadoc)
* @see com.waylau.spring.boot.thymeleaf.repository.UserRepository#getUserById(java.lang.Long) */ @Override public User getUserById(Long id) { return this.userMap.get(id);
} /* (non-Javadoc)
* @see com.waylau.spring.boot.thymeleaf.repository.UserRepository#listUser() */ @Override public List
}
}
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