SpringBoot Web（SpringMVC）

package com.example.demo.controller;import com.example.demo.entity.User;import org.springframework.web.bind.annotation.RequestMapping;import org.springframework.web.bind.annotation.RequestParam;import org.springframework.web.bind.annotation.RestController;import java.util.Arrays;import java.util.HashMap;import java.util.Map;@RestController//返回json格式数据public class DemoController {    @RequestMapping(value="/demo/hello")//http://localhost:8080/demo/hello    public String hello() {        return "hello";    }    @RequestMapping(value="/demo/json")//http://localhost:8080/demo/json    public Map<String, Object> json() {        Map<String, Object> map = new HashMap<>();        map.put("status", "OK");        map.put("data", Arrays.asList("aaa","bbb","ddd"));        return map;    }    @RequestMapping(value="/demo/auto")//http://localhost:8080/demo/auto?id=1&no=2  自动复制到参数中    public Map<String, Object> auto(Integer id, int no) {        Map<String, Object> map = new HashMap<>();        map.put("id", id);        map.put("no", no);        return map;    }    @RequestMapping(value="/demo/xxx")//http://localhost:8080/demo/xxx  可以单独赋值一个参数    public Map<String, Object> ann(            @RequestParam(name = "user", required = false, defaultValue = "admin") String account,            @RequestParam(name = "pass", required = false, defaultValue = "123") String password) {        Map<String, Object> map = new HashMap<>();        map.put("account", account);        map.put("password", password);        return map;    }    @RequestMapping(value="/demo/bean")//http://localhost:8080/demo/bean  可以直接赋值给实体类的属性    public Map<String, Object> bean(User user) {        Map<String, Object> map = new HashMap<>();        map.put("account", user.getAccount());        map.put("password", user.getPassword());        return map;    }}

package com.example.demo.entity;public class User {    private String account;    private String password;    public String getAccount() {        return account;    }    public void setAccount(String account) {        this.account = account;    }    public String getPassword() {        return password;    }    public void setPassword(String password) {        this.password = password;    }    @Override    public String toString() {        return "User{" +                "account='" + account + '\'' +                ", password='" + password + '\'' +                '}';    }}

package com.example.demo.controller;import com.example.demo.entity.User;import org.springframework.ui.Model;import org.springframework.web.bind.annotation.*;import java.util.List;@RestControllerpublic class RestUserController {    // 通过id查询用户信息    // @RequestMapping(value = "/user/{id}", method = RequestMethod.GET)    @GetMapping("/user/{id}")    // @PathVariable从请求中找到id为可以的值赋值方法参数id    public void getUser(@PathVariable int id) {        System.out.println("查询到了id="+id);    }    // 查询所有用户信息    @RequestMapping(value = "/user", method = RequestMethod.GET)    public void getUser() {        System.out.println("查询到所有信息");    }    // 添加用户信息，同样可以将参数直接赋值给实体类    @RequestMapping(value = "/user", method = RequestMethod.POST)    public void saveUser(User user, Model model) {        System.out.println(model);        System.out.println("添加用户信息 user:"+ user);    }    // 修改用户信息 可以使用json传参    @RequestMapping(value = "/user", method = RequestMethod.PUT)    public void updateUser(@RequestBody List<User> user) {        System.out.println("修改用户信息");    }    // 修改用户信息    @RequestMapping(value = "/user/{id}", method = RequestMethod.DELETE)    public void deleteUser(@PathVariable int id) {        System.out.println("删除用户信息 id = " + id);    }}

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

<packaging>war</packaging>

spring.mvc.view.prefix=/WEB-INF/views/spring.mvc.view.suffix=.jsp

package com.boot.jsp.bootjsp.controller;import org.springframework.stereotype.Controller;import org.springframework.web.bind.annotation.GetMapping;@Controllerpublic class JspController {    @GetMapping("/jsp")    public String index() {        return "index";    }}

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

<!DOCTYPE html><html lang="en"><head>    <meta charset="UTF-8">    <title>测试</title></head><body>    boot集成freemarker引擎    <br>姓名: ${user.name}年龄: ${user.age}<#--生日: ${user.birth}--></body></html>

package com.boot.freemark.demo.bootfreemarker1.controller;import org.springframework.stereotype.Controller;import org.springframework.ui.Model;import org.springframework.web.bind.annotation.GetMapping;import java.util.Date;import java.util.HashMap;import java.util.Map;@Controllerpublic class FreemarkerController {    @GetMapping("/index")    public String index() {        return "index";    }    @GetMapping("/data")    public String data(Model model) {        Map<String, Object> map = new HashMap<>();        map.put("name","往屋里");        map.put("age", 10);        map.put("birth", new Date());        model.addAttribute("user", map);        return "index";    }}

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

<!DOCTYPE html><html xmlns:th="http://www.thymeleaf.org"><head>    <meta charset="UTF-8">    <title>测试</title></head><body>    boot集成thymeleaf    <img src="images/tt.jpg"></body></html>

package com.boot.thyemeleaf.boootthyemeleaf.controller;import org.springframework.stereotype.Controller;import org.springframework.ui.Model;import org.springframework.web.bind.annotation.GetMapping;import java.util.HashMap;import java.util.Map;@Controllerpublic class ThymeleafController {    @GetMapping("/index")    public String index() {        return "index";    }    @GetMapping("/data")    public String data(Model model) {        Map<String, Object> map = new HashMap<>();        map.put("name","往屋里");        map.put("age", 10);        model.addAttribute("user", map);        return "index";    }}