java中springMVC获取请求参数的方法

<a th:href="@{/testServlet(username='admin',password=123456)}">测试原生Servlet获取请求参数</a><br>

@RequestMapping(value = "/testServlet")
//形参位置的request表示当前请求
public String testServlet(HttpServletRequest request) {
    System.out.println(request.getParameter("username"));
    System.out.println(request.getParameter("password"));
    return "test";
}

<a th:href="@{/testParam(username='admin',password=123456)}">测试使用控制器的形参获取请求参数</a><br>

@RequestMapping(value = "/testParam")
public String testParam(String username, String password) {
    System.out.println("username = " + username + ", passwprd = " + password);
    return "test";
}

<a th:href="@{/testParam(username007='admin')}">测试使用控制器的形参获取请求参数</a><br>

@RequestMapping(value = "/testParam")
    public String testParam(@RequestParam(value = "username007", required = false, defaultValue = "默认username") String username,
                            @RequestParam(value = "password007", required = false, defaultValue = "默认password") String password) {
        System.out.println("username = " + username + ", passwprd = " + password);
        return "test";
    }

<a th:href="@{/testParam(username='admin',password='123456')}">测试使用控制器的形参获取请求参数</a><br>

@RequestMapping(value = "/testParam")
public String testParam(
        @RequestHeader(value = "Host", required = false, defaultValue = "默认Host") String host,
        @RequestHeader(value = "Cookie", required = false, defaultValue = "默认Cookie") String cookie,
        String username, String password) {
    System.out.println("username = " + username + ", passwprd = " + password);
    System.out.println("Host = " + host + ", Cookie = " + cookie);
    return "test";
}

<a th:href="@{/testParam(username='admin',password='123456')}">测试使用控制器的形参获取请求参数</a><br>

@RequestMapping(value = "/testParam")
    public String testParam(
            @CookieValue("JSESSIONID") String JSESSIONID,
            String username, String password) {
        System.out.println("username = " + username + ", passwprd = " + password);
        System.out.println("JSESSIONID = " + JSESSIONID);
        return "test";
    }

<!--配置过滤器-->
<filter>
    <filter-name>CharacterEncodingFilter</filter-name>
    <filter-class>org.springframework.web.filter.CharacterEncodingFilter</filter-class>
    <!--设置获取时的编码-->
    <init-param>
        <!--在springMVC源码当中有一个encoding属性表示编码方式，可以通过初始化这一参数来设置编码方式-->
        <param-name>encoding</param-name>
        <param-value>UTF-8</param-value>
    </init-param>
    <!--获取响应时的编码-->
    <init-param>
        <param-name>forceResponseEncoding</param-name>
        <param-value>true</param-value>
    </init-param>
</filter>
<!--设置过滤器作用的范围-->
<filter-mapping>
    <filter-name>CharacterEncodingFilter</filter-name>
    <url-pattern>/*</url-pattern>
</filter-mapping>

<form th:action="@{/testBean}" method="get">
    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>
    地址：<input type="text" name="location"><br>
    电话：<input type="text" name="phoneNumber"><br>
    邮箱：<input type="text" name="email"><br>
    <input type="submit" value="使用实体类接收请求参数">
</form>

package com.mvc.bean;
public class User {
    private Integer id;
    private String username;
    private String password;
    private Integer age;
    private String location;
    private String phoneNumber;
    private String sex;
    private String email;
    public User() {
    }
    public User(Integer id, String username, String password, Integer age, String location, String phoneNumber, String sex, String email) {
        this.id = id;
        this.username = username;
        this.password = password;
        this.age = age;
        this.location = location;
        this.phoneNumber = phoneNumber;
        this.sex = sex;
        this.email = email;
    }
    //属性的get和set方法这里写出，太占篇幅了。
    @Override
    public String toString() {
        return "User{" +
                "id=" + id +
                ", username='" + username + '\'' +
                ", password='" + password + '\'' +
                ", age=" + age +
                ", location='" + location + '\'' +
                ", phoneNumber='" + phoneNumber + '\'' +
                ", sex='" + sex + '\'' +
                ", email='" + email + '\'' +
                '}';
    }
}

@RequestMapping(value = "/testBean")
public String testBean(User user) {
    System.out.println(user);
    return "test";
}