SpringBoot基础及FreeMarker模板

案例springboot_freemarker

application.properties配置文件

###FreeMarker配置
spring.freemarker.template-loader-path=classpath:/templates/
spring.freemarker.cache=false
spring.freemarker.charset=UTF-8
spring.freemarker.check-template-location=true
spring.freemarker.content-type=text/html
spring.freemarker.expose-request-attributes=false
spring.freemarker.expose-session-attributes=false
spring.freemarker.request-context-attribute=request

文件夹中创建HelloFreeMarker.ftl文件

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>SpringBoot整合FreeMarker</title>
</head>
<body>
    欢迎：<#--${name}-->
    <#list stuList as stu>
        ${stu.stu_name}
    </#list>

    <#if 1==1>
        呵呵，相等
    </#if>
</body>
</html>

FreeController

@Controller
@RequestMapping("/free")
public class FreeController {

    @RequestMapping("/freeFirst")
    public String freeFirst(ModelMap map){
        map.put("name","没穿裤子");
    }

    @RequestMapping("/freeSecond")
    public String freeSecond(ModelMap map){
        List<String> list=new ArrayList<>();
        list.add("张三");
        list.add("李四");
        list.add("王五");
        map.put("userList",list);
        return "helloFreeMarker";
    }

    @RequestMapping("/freeThread")
    public String freeThread(ModelMap map){
        List<Student> list=new ArrayList<>();
        Student stu=new Student();
        stu.setStu_id(1);
        stu.setStu_name("张三");
        list.add(stu);
        map.put("stuList",list);
        return "helloFreeMarker";
    }
}

Student实体类

public class Student {
    private Integer stu_id;
    private String stu_name;

    public Integer getStu_id() {
        return stu_id;
    }

    public void setStu_id(Integer stu_id) {
        this.stu_id = stu_id;
    }

    public String getStu_name() {
        return stu_name;
    }

    public void setStu_name(String stu_name) {
        this.stu_name = stu_name;
    }
}

案例springboot_hellow

FirstController

@RestController
/**
 * 如果说在Controller类上加RestController注解代表该controller当中的所有方法都返回Json串
 */
@RequestMapping("/first")
public class FirstController {
    @RequestMapping("/firstRequest")
    public String firstRequest(){
        int result=5/0;
        System.out.println("第一个请求到达Controller");
        return "Hello SpringBoot";
    }
}

MyExceptionHandler

@ControllerAdvice
public class MyExceptionHandler {
    //捕获运行时异常
    @ExceptionHandler(RuntimeException.class)
    @ResponseBody
    public Map<String,Object> exceHandler(){
        Map<String,Object> map=new HashMap<>();
        map.put("error","500");
        map.put("msg","您好，服务器暂时出现异常，请稍后重试");
        return map;
    }

StartSpringBoot

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

index.html

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<body>
    静态资源HTML页面
</body>
</html>