request.getParameter()中文乱码

1、jsp页面已设置页面编码：

<%@ page contentType="text/html;charset=UTF-8" %>

表单数据以post方式提交。

2、web.xml添加过滤器，使用的是spring内置过滤器：

<span style="font-size:18px;">  <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>
    <init-param>
      <param-name>forceEncoding</param-name>
      <param-value>true</param-value>
    </init-param>
  </filter></span>

CharacterEncodingFilter源码：

public class CharacterEncodingFilter extends OncePerRequestFilter {

	private String encoding;

	private boolean forceEncoding = false;


	/**
	 * Create a default {@code CharacterEncodingFilter},
	 * with the encoding to be set via {@link #setEncoding}.
	 * @see #setEncoding
	 */
	public CharacterEncodingFilter() {
	}

	/**
	 * Create a {@code CharacterEncodingFilter} for the given encoding.
	 * @param encoding the encoding to apply
	 * @since 4.2.3
	 * @see #setEncoding
	 */
	public CharacterEncodingFilter(String encoding) {
		this(encoding, false);
	}

	/**
	 * Create a {@code CharacterEncodingFilter} for the given encoding.
	 * @param encoding the encoding to apply
	 * @param forceEncoding whether the specified encoding is supposed to
	 * override existing request and response encodings
	 * @since 4.2.3
	 * @see #setEncoding
	 * @see #setForceEncoding
	 */
	public CharacterEncodingFilter(String encoding, boolean forceEncoding) {
		Assert.hasLength(encoding, "Encoding must not be empty");
		this.encoding = encoding;
		this.forceEncoding = forceEncoding;
	}


	/**
	 * Set the encoding to use for requests. This encoding will be passed into a
	 * {@link javax.servlet.http.HttpServletRequest#setCharacterEncoding} call.
	 * <p>Whether this encoding will override existing request encodings
	 * (and whether it will be applied as default response encoding as well)
	 * depends on the {@link #setForceEncoding "forceEncoding"} flag.
	 */
	public void setEncoding(String encoding) {
		this.encoding = encoding;
	}

	/**
	 * Set whether the configured {@link #setEncoding encoding} of this filter
	 * is supposed to override existing request and response encodings.
	 * <p>Default is "false", i.e. do not modify the encoding if
	 * {@link javax.servlet.http.HttpServletRequest#getCharacterEncoding()}
	 * returns a non-null value. Switch this to "true" to enforce the specified
	 * encoding in any case, applying it as default response encoding as well.
	 */
	public void setForceEncoding(boolean forceEncoding) {
		this.forceEncoding = forceEncoding;
	}


	@Override
	protected void doFilterInternal(
			HttpServletRequest request, HttpServletResponse response, FilterChain filterChain)
			throws ServletException, IOException {

		if (this.encoding != null && (this.forceEncoding || request.getCharacterEncoding() == null)) {
			request.setCharacterEncoding(this.encoding);
			if (this.forceEncoding) {
				response.setCharacterEncoding(this.encoding);
			}
		}
		filterChain.doFilter(request, response);
	}

}

过滤器已设置request、response编码为“UTF-8”。

3、在Controller中使用request.getParameter("office.name")取值乱码。

4、编解码后取值正常：

String ss = new String(request.getParameter("office.name").getBytes("ISO8859-1"),"utf-8");

取值为中文。

但不需要将该值取出进行处理，直接将request作为参数进行处理就行，所以初始打算将值取出处理后再set到request中，但是实际操作发现request只有getParameter()方法没有set方法，有setAttribute()方法，set后取值错误。

request.getParameter()取得是通过容器的实现来取得通过类似post，get等方式传入的数据。

request.setAttribute()和getAttribute()只是在web容器内部流转，仅仅是请求处理阶段。

getAttribute是返回对象,getParameter返回字符串 总的来说：request.getAttribute()方法返回request范围内存在的对象，而request.getParameter()方法是获取http提交过来的数据。

5、修改Tomcat容器编码，问题解决：

    <Connector port="8080" protocol="HTTP/1.1"
               connectionTimeout="20000"
               redirectPort="8443" URIEncoding="UTF-8" />

问题虽得到解决，但不是在代码中进行修改，而是修改的部署容器，若如此则每次在项目进行部署时都需要检查Tomcat编码，不知道是否还有其他解决方案？？？