防止出现乱码，J2EE项目一致使用UTF-8编码设置方法

- 日理万妓 2022-07-14 05:46 122阅读 0赞

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# 防止出现乱码，J2EE项目统一使用UTF-8编码设置方法   1.数据库建立为UTF-8格式   2.项目右键属性为UTF-8格式   3.所有页面申明为UTF-8   4.JDBC URL设为：UTF-8   jdbc:mysql://localhost:3306/company?useUnicode=true&characterEncoding=utf-8   5.数据库Driver选择UTF-8格式   6.Tomcat编码改成UTF-8   在server.xml里面增加URIEncoding="UTF-8"     **\[xml\]** [ view plain][view plain] [ copy][view plain] [![在CODE上查看代码片][CODE]][CODE_CODE] [![派生到我的代码片][ico_fork.svg]][ico_fork.svg 1]  <span style="font-size:12px;"><Connector port="8080" maxHttpHeaderSize="8192" maxThreads="150" minSpareThreads="25" maxSpareThreads="75" enableLookups="false" redirectPort="8443" acceptCount="100" connectionTimeout="20000" disableUploadTimeout="true" URIEncoding="UTF-8" />    </span>       7.加编码过滤器SetCharacterEncodingFilter.java    注意：根据所在包名确定具体使用哪个包     **\[java\]** [ view plain][view plain] [ copy][view plain] [![在CODE上查看代码片][CODE]][CODE_CODE] [![派生到我的代码片][ico_fork.svg]][ico_fork.svg 1]  <span style="font-size:12px;">import <a target=\_blank target="\_blank" href="http://www.myexception.cn/j2me/java.io.IOException.html">java.io.IOException</a>;        import javax.servlet.Filter;        import javax.servlet.FilterChain;        import javax.servlet.FilterConfig;        import <a target=\_blank target="\_blank" href="http://www.myexception.cn/java-web/javax.servlet.ServletException.html">javax.servlet.ServletException</a>;        import javax.servlet.ServletRequest;        import javax.servlet.ServletResponse;        public class SetCharacterEncodingFilter implements Filter \{            protected String encoding = null;            protected FilterConfig filterConfig = null;            protected boolean ignore = true;            public void init(FilterConfig filterConfig) throws <a target=\_blank target="\_blank" href="http://www.myexception.cn/j2se/ServletException.html">ServletException</a> \{                this.filterConfig = filterConfig;                this.encoding = filterConfig.getInitParameter("encoding");                String value = filterConfig.getInitParameter("ignore");                if (value == null)                    this.ignore = true;                else if (value.equalsIgnoreCase("true"))                    this.ignore = true;                else if (value.equalsIgnoreCase("yes"))                    this.ignore = true;                else                    this.ignore = false;            \}            public void doFilter(ServletRequest request, ServletResponse response,                FilterChain chain) throws <a target=\_blank target="\_blank" href="http://www.myexception.cn/j2se/IOException.html">IOException</a>, ServletException \{                // TODO 自动生成方法存根                if (ignore || (request.getCharacterEncoding() == null)) \{                    String encoding = selectEncoding(request);                    if (encoding != null)                        request.setCharacterEncoding(encoding);                \}                chain.doFilter(request, response);            \}            public void destroy() \{                // TODO 自动生成方法存根                this.encoding = null;                this.filterConfig = null;            \}            protected String selectEncoding(ServletRequest request) \{                return (this.encoding);            \}        \}    </span>          在web.xml里面映射配置     **\[xml\]** [ view plain][view plain] [ copy][view plain] [![在CODE上查看代码片][CODE]][CODE_CODE] [![派生到我的代码片][ico_fork.svg]][ico_fork.svg 1]  <span style="font-size:12px;">  <filter>        <filter-name>Set Character Encoding</filter-name>        <filter-class>com.yourcompany.util.SetCharacterEncodingFilter</filter-class>        <init-param>          <param-name>encoding</param-name>          <param-value>UTF-8</param-value>        </init-param>      </filter>      <filter-mapping>        <filter-name>Set Character Encoding</filter-name>        <url-pattern>/\*</url-pattern>      </filter-mapping>    </span>     #

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