解決post請求亂碼問題

1、請求：

<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、實體類：

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、處理方法：

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

4、總結：

4.1、表單若為GET請求方式時中文不會亂碼

4.2、表單若為POST請求方式時中文會亂碼，解決中文亂碼的方式：在web.xml中配置CharacterEncodingFilter過濾器

  <!--解決POST請求中文亂碼-->
  <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>