SpringBoot访问NoSQL和简单的Thymeleaf-Spring-Spring-boot整合

Posted 2020-12-27 hx1098

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SpringBoot访问NoSQL

SpringBoot访问Redis

在pom.xml添加boot-data-redis定义

<parent>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-parent</artifactId>
    <version>2.0.1.RELEASE</version>
</parent>

<properties>
    <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
    <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
    <java.version>1.8</java.version>
</properties>

<dependencies>

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

</dependencies>

在application.properties添加redis连接参数

spring.redis.host=localhost
spring.redis.port=6379

定义启动类

@SpringBootApplication
public class MyBootApplication {

}

测试程序

public static void main(String[] args) {
    ApplicationContext ac = 
        SpringApplication.run(MyBootApplication.class, args);
    RedisTemplate<Object,Object> redis = 
        ac.getBean("redisTemplate",RedisTemplate.class);
    redis.opsForValue().set("name", "SpringBoot");
    Object name = redis.opsForValue().get("name");
    System.out.println(name);
    Dept dept = new Dept();
    dept.setDeptno(10);
    dept.setDname("JAVA");
    dept.setLoc("北京");
    redis.opsForValue().set("dept", dept);
    Dept dept1 = (Dept)redis.opsForValue().get("dept");
    System.out.println(
        dept1.getDeptno()+" "+dept1.getDname()+" "+dept1.getLoc());

}

SpringBoot访问Mongodb

在pom.xml追加boot-starter-data-mongodb定义

<parent>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-parent</artifactId>
    <version>2.0.1.RELEASE</version>
</parent>

<properties>
    <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
    <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
    <java.version>1.8</java.version>
</properties>

<dependencies>

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

</dependencies>

在application.properties追加连接参数定义

spring.data.mongodb.uri=mongodb://localhost:27017/java20

#spring.data.mongodb.host=localhost
#spring.data.mongodb.port=27017
#spring.data.mongodb.database=java20

定义主启动类

@SpringBootApplication
public class MyBootApplication {

}

测试程序

public static void main(String[] args) {
    ApplicationContext ac = 
        SpringApplication.run(MyBootApplication.class, args);
    MongoTemplate template = 
        ac.getBean("mongoTemplate",MongoTemplate.class);
    List<Dept> list = template.findAll(Dept.class);
    for(Dept dept:list){
        System.out.println(
            dept.getDeptno()+" "+dept.getDname()+" "+dept.getLoc());
    }
}

SpringBoot MVC

主要封装了SpringMVC、Restful、内置tomcat等功能。

restful服务

SSM：SpringMVC、IOC、MyBatis

/dept/get GET 查询部门信息

/dept/list GET 分页查询部门信息

请求-->DispatcherServlet-->HandlerMapping-->DeptController-->DeptDao-->返回JSON结果

在pom.xml追加web、jdbc、mybatis-spring、驱动包定义

<parent>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-parent</artifactId>
    <version>2.0.1.RELEASE</version>
</parent>

<properties>
    <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
    <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
    <java.version>1.8</java.version>
</properties>

<dependencies>

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

    <dependency>
        <groupId>com.oracle</groupId>
        <artifactId>ojdbc6</artifactId>
        <version>11.2.0.3</version>
    </dependency>

    <!-- mybatis、mybatis-spring、autocofigurer -->
    <dependency>
        <groupId>org.mybatis.spring.boot</groupId>
        <artifactId>mybatis-spring-boot-starter</artifactId>
        <version>1.3.0</version>
    </dependency>

    <dependency>
        <groupId>com.github.pagehelper</groupId>
        <artifactId>pagehelper-spring-boot-starter</artifactId>
        <version>1.2.3</version>
    </dependency>

</dependencies>

在application.properties追加连接参数定义

#server
server.port=8888

#datasource
spring.datasource.username=SCOTT
spring.datasource.password=TIGER
spring.datasource.url=jdbc:oracle:thin:@localhost:1521:XE
spring.datasource.driverClassName=oracle.jdbc.OracleDriver

编写实现DeptDao

定义实体类Dept（同上）

定义Mapper映射器+注解SQL

public interface DeptDao {

    @Select("select * from dept where deptno=#{no}")
    public Dept findById(int no);

    @Select("select * from dept order by deptno")
    public List<Dept> findAll();

}

编写实现DeptController

@RestController
public class DeptController {

    @Autowired
    private DeptDao deptDao;

    @GetMapping("/dept/get")// dept/get?no=xx
    public Dept load(int no){
        Dept dept = deptDao.findById(no);
        return dept;
    }

    @GetMapping("/dept/list")// dept/list?page=xx&size=xx
    public List<Dept> loadPage(
        @RequestParam(required=false,defaultValue="1",name="page")int pageNum,
        @RequestParam(required=false,defaultValue="5",name="size")int pageSize){
        PageHelper.startPage(pageNum, pageSize);
        List<Dept> list = deptDao.findAll();
        return list;
    }

}

定义启动类、追加@SpringBootApplication、@MapperScan标记

@SpringBootApplication
@MapperScan(basePackages={"cn.xdl.dao"})
public class MyBootApplication {

    public static void main(String[] args) {
        SpringApplication.run(MyBootApplication.class, args);
    }

}

启动Boot程序测试

JSP响应界面

/hello-->DispatcherServlet-->HandlerMapping-->HelloController-->ModelAndView-->ViewResolver-->/hello.jsp

在pom.xml追加web、jasper定义

<parent>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-parent</artifactId>
    <version>2.0.1.RELEASE</version>
</parent>

<properties>
    <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
    <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
    <java.version>1.8</java.version>
</properties>

<dependencies>

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

    <dependency>
        <groupId>org.apache.tomcat.embed</groupId>
        <artifactId>tomcat-embed-jasper</artifactId>
    </dependency>

</dependencies>

在application.properties追加server、viewresolver定义

#server
server.port=8888

#viewresolver
spring.mvc.view.prefix=/
spring.mvc.view.suffix=.jsp

编写HelloController

@Controller
public class HelloController {

    @GetMapping("/hello")
    public ModelAndView execute(){
        System.out.println("进入HelloController.execute处理");
        ModelAndView mav = new ModelAndView();
        mav.setViewName("hello");//hello.jsp
        mav.getModel().put("msg", "你好");
        return mav;
    }

    @GetMapping("/hello1")
    public String execute1(ModelMap model){
        System.out.println("进入HelloController.execute1处理");
        model.put("msg", "Hello");
        return "hello";
    }

}

编写hello.jsp

<html>
    <head>
    <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
    <title>Insert title here</title>
    </head>
    <body>
    <h1>SpringBoot JSP应用</h1>
    <h2>${msg}</h2>
    </body>
</html>

编写启动类

@SpringBootApplication
public class MyBootApplication {

    public static void main(String[] args) {
        SpringApplication.run(MyBootApplication.class, args);
    }

}

启动测试
```
http://localhost:8888/hello
```

Thymeleaf模板响应界面

模板技术是对JSP技术的一个替代品，优点如下：

使用简单、方便（JSP复杂）
运行机制简单、效率高（JSP-->Servlet-->.class-->HTML输出）

Velocity : hello.vm + VTL

Freemarker：hello.ftl + FTL

Thymeleaf：hello.html + THTL

在pom.xml中追加boot-starter-thymeleaf定义

<parent>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-parent</artifactId>
    <version>1.4.7.RELEASE</version>
</parent>

<properties>
    <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
    <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
    <java.version>1.8</java.version>
</properties>

<dependencies>
    <!-- web -->
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-web</artifactId>
    </dependency>

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

</dependencies>

在application.properties追加server配置
```
server.port=8888
```

定义Controller组件

@Controller
public class HelloController {

    @GetMapping("/hello")
    public ModelAndView execute(){
        ModelAndView mav = new ModelAndView();
        mav.setViewName("hello");///templates/hello.html
        mav.getModel().put("msg", "SpringBoot Thymeleaf");
        return mav;
    }

}

定义html模板文件，放在src/main/resources/templates目录中

<!DOCTYPE html>
<html xmlns:th="http://www.thymeleaf.org">
<head>
    <meta charset="UTF-8">
    <title>Insert title here</title>
</head>
<body>
    <h1 th:text="${msg}"></h1>
</body>
</html>

定义启动类

@SpringBootApplication
public class MyBootApplication {

    public static void main(String[] args) {
        SpringApplication.run(MyBootApplication.class, args);
    }

}

启动程序测试
```
http://localhost:8888/hello
```
1.x版本的Boot需要取消严格的模板标记校验(开始和结束必须匹配)
```
<dependency>
    <groupId>net.sourceforge.nekohtml</groupId>
    <artifactId>nekohtml</artifactId>
</dependency>
```
在application.properties添加spring.thymeleaf.mode=LEGACYHTML5

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