springboot学习三（springboot结合spring data jpa和freemarker显示）

springboot学习三（springboot结合spring data jpa和freemarker显示）

1.springboot结合springdatajpa
pom.xml

<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd"> <modelVersion>4.0.0</modelVersion>
<groupId>com.zl</groupId>
<artifactId>springboot-jpa</artifactId>
<version>0.0.1-SNAPSHOT</version>
<packaging>war</packaging>
<name>springboot-jpa</name>
<description/>
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>1.5.2.RELEASE</version>
</parent>

<properties>
<webVersion>3.1</webVersion>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
</properties>
<dependencies>

<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-data-jpa</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>

<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
</dependency>

<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
</dependency>

<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-cache</artifactId>
</dependency>

<!-- 引入freeMarker的依赖包. -->
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-freemarker</artifactId>
</dependency>

</dependencies>
<build>
<plugins>
<plugin>
<artifactId>maven-compiler-plugin</artifactId>
<version>2.3.2</version>
<configuration>
<source>1.8</source>
<target>1.8</target>
</configuration>
</plugin>
<plugin>
<artifactId>maven-war-plugin</artifactId>
<version>2.6</version>
<configuration>
<failOnMissingWebXml>false</failOnMissingWebXml>
</configuration>
</plugin>
<plugin>
<groupId>org.springframework.boot</groupId>

4000
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
</plugins>
</build>
</project>

2.javabean

package com.zl.entity;

import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.Id;
import javax.persistence.Table;

/**
*
* @author： zenglong
* @ClassName: User
* @Description: 实体类
* @date： 2017年9月5日
*/

@Entity
@Table(name="user")
public class User {
@Id
@GeneratedValue
private String 	uid;
private String name;
private int age;
private String phone;
private String passwd;
public String getUid() {
return uid;
}
public void setUid(String uid) {
this.uid = uid;
}
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;
}
public String getPhone() {
return phone;
}
public void setPhone(String phone) {
this.phone = phone;
}
public String getPasswd() {
return passwd;
}
public void setPasswd(String passwd) {
this.passwd = passwd;
}

}

3.service

package com.zl.service.impl;

import java.util.List;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.cache.annotation.Cacheable;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import com.zl.dao.UserJpaRepository;
import com.zl.entity.User;
import com.zl.service.IUserService;

@Service
@Transactional
public class UserServiceImpl implements  IUserService{

@Autowired
private UserJpaRepository userDao;

@Override
public List<User> findAll() {
// TODO Auto-generated method stub
return userDao.findAll();
}

@Override
public void saveUser(User book) {
userDao.save(book);
}

@Cacheable("users")
@Override
public User findOne(int id) {
System.out.println("Cached Pages");
return userDao.findOne((long) id);
}

@Override
public void delete(int id) {
userDao.delete((long) id);
}

@Override
public List<User> findByName(String name) {
List<User> userList1 = userDao.findByName1(name);
List<User> userList2 = userDao.findByName2(name);
List<User> userList3 = userDao.findByNameAndUid(name, "3");
System.out.println("userList1:" + userList1);
System.out.println("userList2:" + userList2);
System.out.println("userList3:" + userList3);
return userDao.findByName(name);
}

}

4.dao

package com.zl.dao;
import java.util.List;

import org.springframework.data.jpa.repository.JpaRepository;
import org.springframework.data.jpa.repository.Query;
import org.springframework.data.repository.query.Param;

import com.zl.entity.User;
/**
*
* @author： zenglong
* @ClassName: UserJpaRepository
* @Description: 数据持久层
* @date： 2017年9月5日
*/

public interface UserJpaRepository extends JpaRepository<User, Long> {
List<User> findByNameAndUid(String name, String uid);

@Query(value = "from User u where u.name=:name")
List<User> findByName1(@Param("name") String name);

@Query(value = "select * from #{#entityName} u where u.name=?1", nativeQuery = true)
List<User> findByName2(String name);

List<User> findByName(String name);
}

5.控制类

package com.zl.controller;

import java.util.List;

import javax.servlet.http.HttpSession;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.ui.ModelMap;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
import org.springframework.web.servlet.ModelAndView;

import com.zl.entity.User;
import com.zl.service.IUserService;

//@RestController
@Controller
public class UserController {

@Autowired
private IUserService userService;

@RequestMapping(value = "/add/{age}/{name}/{address}/{passwd}")
public User addUser(@PathVariable String passwd,@PathVariable int age, @PathVariable String name,
@PathVariable String phone)
{
User user = new User();
user.setAge(age);
user.setName(name);
user.setPhone(phone);
user.setPasswd(passwd);
userService.saveUser(user);
return user;
}

@RequestMapping(value = "/delete/{id}")
public void deleteBook(@PathVariable int id)
{
userService.delete(id);
}

//    @RequestMapping(value = "/")
//    public String getBooks(ModelMap model)
//    {
//        		List<User> user = userService.findAll();
//        		model.addAttribute("user",user);
//        		return "MyHtml";
//    }

//两种方式传值

@RequestMapping(value = "/")
public ModelAndView getBooks()
{
List<User> user = userService.findAll();
ModelAndView model=new ModelAndView("MyHtml");
//        		ModelAndView model=new ModelAndView("MyHtml","user",user);//或者这样传值
model.addObject("user",user);
return  model;
}

@RequestMapping(value = "/{id}")
public User getUser(@PathVariable int id)
{
User user = userService.findOne(id);
return user;
}

@RequestMapping(value = "/search/name/{name}")
public List<User> getBookByName(@PathVariable String name)
{
List<User> users = userService.findByName(name);
return users;
}

}

6.ftl

<!DOCTYPE html>
<html>
<head>
<title>MyHtml.ftl</title>

<meta name="keywords" content="keyword1,keyword2,keyword3">
<meta name="description" content="this is my page">
<meta name="content-type" content="text/html; charset=UTF-8">

<!--<link rel="stylesheet" type="text/css" href="./styles.css">-->

</head>

<body>
<#list user as item>
${item}<br/>
${item.name}<br/>
</#list>
</body>
</html>

7.访问：http://localhost:8080/

可以看到如下显示

com.zl.entity.User@36623adc
zhangsan
com.zl.entity.User@1b3b13ed
lisi
com.zl.entity.User@67808258
aa
com.zl.entity.User@644bec06
曾龙
com.zl.entity.User@43d89e89
aa