一.springMVC的注解使用
springMVC作为一个请求驱动类型的轻量级web框架,在该框架中支持使用注解来配置控制器.
1.1maven工程引入jar包.
<!--httpManagerConverter转换器--> <dependency> <groupId>com.fasterxml.jackson.core</groupId> <artifactId>jackson-databind</artifactId> <version>2.6.3</version> </dependency>
1.2新建一个普通类.
@Controller //表示该类是一个控制器 public class FirstContreller { @RequestMapping(value = "/hello001")//将前台请求映射到该方法上 public String first01(@PathVariable("color") String color0){ System.out.println(color0); return "/index.jsp"; } }1.3在xml文件中打开包扫描器
<?xml version="1.0" encoding="UTF-8"?> <beans xmlns="http://www.springframework.org/schema/beans" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:mvc="http://www.springframework.org/schema/mvc" xmlns:context="http://www.springframework.org/schema/context" xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd"> <!--注解:包扫描器 --> <context:component-scan base-package="cn.wy.day04returnObject"></context:component-scan> <!--配置驱动--> <mvc:annotation-driven/> <!--解决静态资源不可用--> <mvc:default-servlet-handler></mvc:default-servlet-handler> </beans>
一.int类型做返回值
/*返回值是int*/ @RequestMapping("/first001") @ResponseBody public Object first(){ return 1; }
启动后在浏览器中直接访问first001
二.String类型做返回值
/*返回值是string*/ @RequestMapping("/first01") @ResponseBody public Object first01(){ return "12313123"; }访问同上
三.对象做返回值
/*返回值是对象*/ @RequestMapping("/first02") @ResponseBody public Object first02(){ Car car1=new Car(); car1.setAge(1000); car1.setName("呵呵"); return car1; }访问同上
四.list集合做返回值
/*返回值是list*/ @RequestMapping("/first03") @ResponseBody public Object first03(){ List<Car> list=new ArrayList<Car>(); Car car1=new Car(); car1.setAge(1000); car1.setName("呵呵"); Car car2=new Car(); car2.setAge(1000); car2.setName("屁屁"); list.add(car1); list.add(car2); return list; }访问同上
转载于:https://www.cnblogs.com/wy0119/p/7771617.html
