解决post请求乱码问题

1、请求：

<form action="param/test1" method="post">
    userId:<input type="text" name="userId"><br>
    userName:<input type="text" name="userName"><br>
    <input type="submit" value="提交">
</form>

2、实体类：

package com.ly.springmvc.domain;

import java.io.Serializable;

public class User implements Serializable {
    private Integer userId;
    private String userName;

    public void setUserId(Integer userId) {
        this.userId = userId;
    }

    public void setUserName(String userName) {
        this.userName = userName;
    }

    @Override
    public String toString() {
        return "User{" +
                "userId=" + userId +
                ", userName='" + userName + '\'' +
                '}';
    }
}

3、处理方法：

@RequestMapping("/param/test1")
public String testParam4(User u) {
    System.out.println("testParam4");
    System.out.println(u);
    return "success";
}

4、总结：

4.1、表单若为GET请求方式时中文不会乱码

4.2、表单若为POST请求方式时中文会乱码，解决中文乱码的方式：在web.xml中配置CharacterEncodingFilter过滤器

  <!--解决POST请求中文乱码-->
  <filter>
    <filter-name>characterEncodingFilter</filter-name>
    <filter-class>org.springframework.web.filter.CharacterEncodingFilter</filter-class>
    <init-param>
      <param-name>encoding</param-name>
      <param-value>UTF-8</param-value>
    </init-param>
  </filter>
  <filter-mapping>
    <filter-name>characterEncodingFilter</filter-name>
    <url-pattern>/*</url-pattern>
  </filter-mapping>