SpringBoot Restful API 请求响应总结

迈不过友情╰ 2023-10-10 12:13 1阅读 0赞

## Controller 映射注解分为两大类:url映射注解和参数绑定注解 ##

### url映射注解: ###

*  `@Controller`：修饰class，用来创建处理http请求的对象
 *  `@RestController`：Spring4之后加入的注解，原来在`@Controller`中返回json需要`@ResponseBody`来配合，如果直接用`@RestController`替代`@Controller`就不需要再配置`@ResponseBody`，默认返回json格式。
 *  `@RequestMapping`：配置url映射

### 参数绑定注解: ###

*  `@PathVariable`：路径参数绑定
 *  `@ModelAttribute`：表单模型参数绑定(不支持json) 使用频率低
 *  `@RequestParam`：单个表单参数绑定
 *  `@RequestBody`：接收payload方式提交的json数据

### Controller 实现Restful 请求简单实例: ###

package com.zzg.controller;
    
    import java.util.Map;
    import org.springframework.beans.factory.annotation.Autowired;
    import org.springframework.web.bind.annotation.PathVariable;
    import org.springframework.web.bind.annotation.RequestBody;
    import org.springframework.web.bind.annotation.RequestMapping;
    import org.springframework.web.bind.annotation.RequestMethod;
    import org.springframework.web.bind.annotation.RequestParam;
    import org.springframework.web.bind.annotation.RestController;
    import com.baomidou.mybatisplus.core.conditions.query.QueryWrapper;
    import com.baomidou.mybatisplus.extension.plugins.pagination.Page;
    import com.zzg.common.controller.AbstractController;
    import com.zzg.entity.User;
    import com.zzg.service.UserService;
    
    @RestController
    @RequestMapping("/api/user")
    public class UserController extends AbstractController<User> {
    
    	@Autowired
    	private UserService userService;
    
    	// 增
    	@RequestMapping(value = "/insert", method = { RequestMethod.POST }, produces = "application/json;charset=UTF-8")
    	public Object insert(@RequestBody User user) {
    		return userService.save(user);
    	}
    
    	// 改
    	@RequestMapping(value = "/update", method = { RequestMethod.POST }, produces = "application/json;charset=UTF-8")
    	public Object update(@RequestBody User user) {
    		return userService.updateById(user);
    	}
    
    	// 删
    	@RequestMapping(value = "/delete/{id}", method = { RequestMethod.DELETE })
    	public Object delete(@PathVariable("id") Integer id) {
    		return userService.removeById(id);
    	}
    
    	// 查
    	@RequestMapping(value = "/getUserByName", method = { RequestMethod.GET })
    	public Object getUserByName(@RequestParam String userName) {
    		QueryWrapper<User> query = new QueryWrapper<User>();
    		query.like("username", userName);
    		return userService.getOne(query);
    	}
    
    	// 查
    	@RequestMapping(value = "/getId", method = { RequestMethod.GET })
    	public Object getId(@RequestParam Integer id) {
    		return userService.getById(id);
    	}
    	
    	// 查
    	@RequestMapping(value = "/getPage", method = { RequestMethod.POST })
    	public Object getPage(@RequestBody Map<String, Object> parame) {
    		Page<User> page = this.initPageBounds(parame);
    		return userService.page(page);
    	}
    	
    
    }

效果截图:

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3pob3V6aGl3ZW5nYW5n_size_16_color_FFFFFF_t_70][]

[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3pob3V6aGl3ZW5nYW5n_size_16_color_FFFFFF_t_70]: https://img-blog.csdnimg.cn/20201225184931718.png?x-oss-process=image/watermark,type_ZmFuZ3poZW5naGVpdGk,shadow_10,text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3pob3V6aGl3ZW5nYW5n,size_16,color_FFFFFF,t_70