Springmvc中@RequestParam傳值中文亂碼解決方案

首先jsp表單里面有一些參數要傳到controller中，通過以下方法接收： 

@RequestMapping(value="/orderPaper")
    public ModelAndView orderPaper(
            @RequestParam("paperName")String paperName,
            @RequestParam("openStartTime")String openStartTime,
            @RequestParam("openEndTime")String openEndTime ) {
        ModelAndView mv = new ModelAndView();
mv.addObject("paperName", paperName);    //這里面傳過來的是中文，接收到的是一堆笑得很開心的的亂碼
        mv.setViewName("/college/orderPaper");
        return mv;
    }

怎么處理呢？通過下面的工具類： 

public class EncodingTool {
    public static String encodeStr(String str) {
        try {
            return new String(str.getBytes("ISO-8859-1"), "UTF-8");
        } catch (UnsupportedEncodingException e) {
            e.printStackTrace();
            return null;
        }
    }
}

這樣，只要把controller中改為

mv.addObject("paperName",EncodingTool.encodeStr(paperName));

在網上有的說還需要在web.xml里面配置： 

<!-- 字符過濾器 -->
  <filter>
    <filter-name>encodingFilter</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>encodingFilter</filter-name>
    <url-pattern>/*</url-pattern>
  </filter-mapping>