1.基本类型

基本类型参数不可为空

正例：

反例：（报400错误）

注意：String不是基本类型，具体参考>

@RestController //定义控制器返回字符串public class HelloController {    @RequestMapping(value = "/hello", method = RequestMethod.GET)    public String printHello(int id) {        return "Response:"+id;    }    //添加@RequestParam(required=false)参数可为空    @RequestMapping(value = "/hello", method = RequestMethod.GET)    public String printHello(@RequestParam(required=false)int id) {        return "Response:"+id;    }}

2.包装类和数组的处理

@RestController public class HelloController {    // http://localhost:8080/demo/hello?id=1    @RequestMapping(value = "/hello", method = RequestMethod.GET)    public String printHello(Integer id) {        return "Response:"+id;    }    // http://localhost:8080/demo/hi?name=Tom&name=Jim    @RequestMapping(value = "/hi", method = RequestMethod.GET)    public String printHello(String[] name) {        return "Response:"+anme;    }}

3.简单对象&多层级对象&同属性对象

//简单对象    //http://127.0.0.1:8080/Spring/hi?age=10&name=Tom    @RequestMapping(value="/hi", method = RequestMethod.GET)        @ResponseBody    public String object(Student student){        return student.toString();    }    //多层级对象    //http://127.0.0.1:8080/Spring/hi2?age=10&name=Tom&student.age=18    @RequestMapping(value="/hi2", method = RequestMethod.GET)       @ResponseBody    public String object2(Admin admin){        return admin.toString();    }    //同属性的多对象    //http://127.0.0.1:8080/Spring/hi3?name=Tom&student.age=18    @RequestMapping(value="/hi3", method = RequestMethod.GET)       @ResponseBody    public String object3(Student student, Admin admin){        return student.toString()+admin.toString();    }    //同属性的多对象赋值 需指定对象的前缀    @InitBinder("student")    public void initStudent(WebDataBinder binder){        binder.setFieldDefaultPrefix("student.");    }    //同属性的多对象赋值 需指定对象的前缀    @InitBinder("admin")    public void initStudent2(WebDataBinder binder){        binder.setFieldDefaultPrefix("admin.");    }

4.List&Set&Map

public class ListFrom {    private List
    
      users ;    getter setter...    @Override    public String toString() {        return "ListFrom [users=" + users + "]";    }}
    

public class MapFrom {    private Map
    
      users ;    getter setter...    @Override    public String toString() {        return "MapFrom [users=" + users + "]";    }   }
    

@RestControllerpublic class DataController {    //List对象    //http://127.0.0.1:8080/Spring/list?users[0].age=10&users[1].name=Tom    @RequestMapping(value="/list", method = RequestMethod.GET, produces={
   "text/html;charset=UTF-8"})    //支持中文    public String object2(ListFrom s){        return s.toString();    }    //Map对象    //http://127.0.0.1:8080/Spring/map?users["X"].age=10&users["Y"].name=Tom    @RequestMapping(value="/map", method = RequestMethod.GET)       public String object3(MapFrom s){        return s.toString();    }}

5.Json或Xml 数据参数

@RequestBody 注解

//发送json数据到该url即可实现数据绑定    @RequestMapping(value="/json", method = RequestMethod.POST)     public String object3(@RequestBody Student s){        return s.toString();    }

对于xml数据，需要在实体类中添加注释

@XmlRootElement(name = "admin")public class Admin {    private String name;    private Integer age;    @XmlElement(name = "name")    public String getName() {        return name;    }    public void setName(String name) {        this.name = name;    }    @XmlElement(name = "age")    public Integer getAge() {        return age;    }    public void setAge(Integer age) {        this.age = age;    }}

然后

//发送xml数据到该url即可实现数据绑定    @RequestMapping(value="/xml", method = RequestMethod.POST)      public String object3(@RequestBody Admin s){        return s.toString();    }

6. PropertyEditor、Formatter、Converter

局部配置

//PropertyEditor    //http://127.0.0.1:8080/Spring_iMooc/date1?date1=2018-01-01    @RequestMapping(value="/date1", method = RequestMethod.GET)     public String date1(Date date1){        return date1.toString();    }    @InitBinder("date1")    public void initDate1(WebDataBinder binder){        binder.registerCustomEditor(Date.class, new CustomDateEditor(new SimpleDateFormat("yyyy-MM-dd"), true));    }

全局配置

1）自定义Formatter

2）注入

3）使用

也可以使用自定义Converter

1）自定义

2）配置

3）使用

7.RESTful扩展

简单来说，就是把参数移到URL上，比如下面。

https://docs.spring.io/spring-boot/docs/1.5.10.RELEASE/reference/pdf/spring-boot-reference.pdf 　 http://jbk.39.net/xebm/

使用方法

@RequestMapping("/subject/{name}") public String demo(@PathVariable("name") String name){
   　　return name; }

路径URL也支持通配符匹配

通配符	描述
?	匹配任何单字符
*	匹配0或者任意数量的字符
**	匹配0或者更多的目录