SpringMVC获取请求参数笔记整理

 @RequestMapping("/testParam")
    public String testParam(httpservletRequest request){
        String username = request.getParameter("username");
        String passWord = request.getParameter("password");
        System.out.println("username:"+username+",password:"+password);
        return "success";
    }

<fORM method="get" action="/springMVC/testParam">
    username: <input  type="text"   name="username"/>
    password: <input  type="password"   name="password"/>
    <input type="submit" value="Submit" />
</form>

    @RequestMapping("/testParam")
    public String testParam(String username,String password){
        System.out.println("username:"+username+",password:"+password);
        return "success";
    }

<form method="get" action="/SpringMVC/testParam">
    username: <input  type="text"   name="username"/>
    password: <input  type="password"   name="password"/>
    <input type="submit" value="Submit" />
</form>

@Target({ElementType.PARAMETER})
@Retention(RetentionPolicy.RUNTIME)
@Documented
public @interface RequestParam {
    //别名name，一般默认为空
    @AliasFor("name")
    String value() default "";
	//指定为形参赋值的请求参数的参数名
    @AliasFor("value")
    String name() default "";
	//设置是否必须传输此请求参数，默认值为true
    boolean required() default true;
	//用来定义默认值
    String defaultValue() default "\n\t\t\n\t\t\n\ue000\ue001\ue002\n\t\t\t\t\n";
}

    @RequestMapping(value = "/testParam", method = RequestMethod.POST)
    public String testParam(@RequestParam(value = "user_name",required = false,defaultValue = "gg") String name,
                            @RequestParam(value = "password",required = true,defaultValue = "hh") String pwd,
                            String[] hobby) {

        System.out.println(name + pwd + Arrays.toString(hobby));
        return "success";
    }

<form th:action="@{/testParam}" method="post">
    用户名：<input type="name" name = "user_name"><br>
    密码：<input type="password" name = "password"><br>
    爱好：<input type="checkbox" name = "hobby" value="a">a
    <input type="checkbox" name = "hobby" value="b">b
    <input type="checkbox" name = "hobby" value="c">c<br>
    <input type="submit" value="测试">
</form>

@RequestMapping(value = "/testParam2",method = RequestMethod.POST)
//形参位置的request表示当前请求
public String testParam2(@RequestParam("username") String name,
                         @RequestParam("password") String pwd,
                         String[] hobby,
                         @RequestHeader("Host") String host){
    System.out.println(name+pwd+ Arrays.toString(hobby));
    System.out.println("Host:"+host);//输出结果Host:localhost:8080
    return "success";
}

@CookieValue("jsESSIONID") String JSESSIONID

@Controller
@RequestMapping("hello")
public class HelloController2 {
    @RequestMapping("show25")
    public String test25(Model model, @CookieValue("JSESSIONID")String jsessionid){
        model.addAttribute("msg", "获取cookie,jsessionid:" + jsessionid);
        return "hello2";
    }
}

package xiaobao.mvc.bean;
public class User {
    private Integer id;
    private String username;
    private String password;
    private Integer age;
    private String sex;
    private String email;
    public Integer getId() {
        return id;
    }
    public void setId(Integer id) {
        this.id = id;
    public String getUsername() {
        return username;
    public void setUsername(String username) {
        this.username = username;
    public String getPassword() {
        return password;
    public void setPassword(String password) {
        this.password = password;
    public Integer getAge() {
        return age;
    public void setAge(Integer age) {
        this.age = age;
    public String getSex() {
        return sex;
    public void setSex(String sex) {
        this.sex = sex;
    public String getEmail() {
        return email;
    public void setEmail(String email) {
        this.email = email;
    @Override
    public String toString() {
        return "User{" +
                "id=" + id +
                ", username='" + username + '\'' +
                ", password='" + password + '\'' +
                ", age=" + age +
                ", sex='" + sex + '\'' +
                ", email='" + email + '\'' +
                '}';
}

<form th:action="@{/testpojo}" method="post">
    用户名：<input type="text" name="username"><br>
    密码：<input type="password" name="password"><br>
    性别：<input type="radio" name="sex" value="男">男<input type="radio" name="sex" value="女">女<br>
    年龄：<input type="text" name="age"><br>
    邮箱：<input type="text" name="email"><br>
    <input type="submit">
</form>

@RequestMapping("/testpojo")
public String testPOJO(User user){
    System.out.println(user);
    return "success";
}