Spring Boot JdbcTemplate:
(1) 在pom.xml加入jdbcTemplate的依赖;
(2) 编写DemoDao类,声明为:@Repository,引入JdbcTemplate
(3) 编写DemoService类,引入DemoDao进行使用
(4) 编写Demo2Controller进行简单测试。
在pom.xml加入jdbcTemplate的依赖:
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-jdbc</artifactId>
</dependency>
如果在JPA已经加入的话,则可以不用引入以上的配置。
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-data-jpa</artifactId>
</dependency>
那么只需要在需要使用的类中加入:
@Resource
private JdbcTemplate jdbcTemplate;
编写DemoDao类:
声明为:@Repository,引入JdbcTemplate
public Demo getById(long id){
String sql = "select *from Demo where id=?";
RowMapper<Demo> rowMapper = new BeanPropertyRowMapper<Demo>(Demo.class);
return jdbcTemplate.queryForObject(sql, rowMapper,id);
}
编写DemoService类,引入DemoDao进行使用:
@Resource
private DemoDao demoDao;
public void save(Demo demo){
demoDao.save(demo);
}
编写Demo2Controller进行简单测试:
@Resource
private DemoService demoService;
@RequestMapping("/getById")
public Demo getById(long id){
return demoService.getById(id);
}
全局异常捕捉:
在一个项目中的异常我们我们都会统一进行处理的,那么如何进行统一进行处理呢?
新建一个类GlobalDefaultExceptionHandler,
在class注解上@ControllerAdvice,
在方法上注解上@ExceptionHandler(value = Exception.class),具体代码如下:
@ControllerAdvice
public class GlobalDefaultExceptionHandler{
@ExceptionHandler(value = Exception.class)
public void defaultErrorHandler(HttpServletRequest req, Exception e) {
}
配置server信息:
1/修改端口号
2/修改context-path
3/其它配置说明
Spring boot 默认端口是8080,如果想要进行更改的话,只需要修改applicatoin.properties文件,在配置文件中加入:
server.port=8081
applicatoin.properties里面有数据库的配置信息,jpa的配置信息,server的配置信息。
配置context-path:
在application.properties进行配置:
server.context-path=/spring-boot
访问地址就是http://ip:port/spring-boot/hello可以访问
其它server配置:
#server.port=8080
#server.address= # bind to a specific NIC
#server.session-timeout= # session timeout in seconds
#the context path, defaults to '/'
#server.context-path=/spring-boot
#server.servlet-path= # the servlet path, defaults to '/'
#server.tomcat.access-log-pattern= # log pattern of the access log
#server.tomcat.access-log-enabled=false # is access logging enabled
#server.tomcat.protocol-header=x-forwarded-proto # ssl forward headers
#server.tomcat.remote-ip-header=x-forwarded-for
#server.tomcat.basedir=/tmp # base dir (usually not needed, defaults to tmp)
#server.tomcat.background-processor-delay=30; # in seconds
#server.tomcat.max-threads = 0 # number of threads in protocol handler
#server.tomcat.uri-encoding = UTF-8 # character encoding to use for URL decoding
spring boot使用thymeleaf:
(1)在pom.xml中引入thymeleaf;
(2)如何关闭thymeleaf缓存
(3)编写模板文件.html
(4)编写访问模板文件controller
在pom.xml加入thymeleaf的依赖:
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-thymeleaf</artifactId>
</dependency>
如何关闭thymeleaf缓存:
spring.thymeleaf.cache=false
编写模板文件.html
编写模板文件src/main/resouces/templates/hello.html:
<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml" xmlns:th="http://www.thymeleaf.org"
xmlns:sec="http://www.thymeleaf.org/thymeleaf-extras-springsecurity3">
<head>
<title>Hello World!</title>
</head>
<body>
<h1 th:inline="text">Hello.v.2</h1>
<p th:text="${hello}"></p>
</body>
</html>
编写访问模板文件controller
@Controller
public class TemplateController {
/**
* 返回html模板.
*/
@RequestMapping("/helloHtml")
public String helloHtml(Map<String,Object> map){
map.put("hello","from TemplateController.helloHtml");
return "/helloHtml";
}
}
Spring Boot 使用freemarker:
(1)在pom.xml中引入freemarker;
(2)如何关闭freemarker缓存
(3)编写模板文件.ftl
(4)编写访问文件的controller
在pom.xml中引入freemarker:
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-freemarker</artifactId>
</dependency>
如何关闭freemarker缓存:
########################################################
###FREEMARKER (FreeMarkerAutoConfiguration)
########################################################
spring.freemarker.allow-request-override=false
spring.freemarker.cache=true
spring.freemarker.check-template-location=true
spring.freemarker.charset=UTF-8
spring.freemarker.content-type=text/html
spring.freemarker.expose-request-attributes=false
spring.freemarker.expose-session-attributes=false
spring.freemarker.expose-spring-macro-helpers=false
#spring.freemarker.prefix=
#spring.freemarker.request-context-attribute=
#spring.freemarker.settings.*=
#spring.freemarker.suffix=.ftl
#spring.freemarker.template-loader-path=classpath:/templates/ #comma-separated list
#spring.freemarker.view-names= # whitelist of view names that can be resolved
编写模板文件.ftl
<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml" xmlns:th="http://www.thymeleaf.org"
xmlns:sec="http://www.thymeleaf.org/thymeleaf-extras-springsecurity3">
<head>
<title>Hello World!</title>
</head>
<body>
<h1>Hello.v.2</h1>
<p>${hello}</p>
</body>
</html>
编写访问文件的controller
@RequestMapping("/helloFtl")
public String helloFtl(Map<String,Object> map){
map.put("hello","from TemplateController.helloFtl");
return "/helloFtl";
}