示例问题代码：
|
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@WebFilter (filterName = "authorizeFilter" , urlPatterns = { "*.htm" , "*.html" }, asyncSupported = true ) public class AuthorizeFilter implements Filter {
@Autowired private OtherBean otherBean;
@Override public void init(FilterConfig filterConfig) throws ServletException {
}
@Override public void destroy() {
}
@Override public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain) throws IOException, ServletException { // true System.out.println(otherBean == null ); } } |
现象：
本地运行测试均可通过，上测试环境后运行注入bean为空
现象：使用外置tomcat可触发，本地使用内置tomcat则无此问题
解决代码
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@Component public class AuthorizeFilter implements Filter {
@Autowired private OtherBean otherBean;
@Override public void init(FilterConfig filterConfig) throws ServletException {
}
@Override public void destroy() {
}
@Override public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain) throws IOException, ServletException { // false System.out.println(otherBean == null ); } } |
|
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@Configuration public class WebFilterConfig implements WebMvcConfigurer {
@Autowired private AuthorizeFilter authorizeFilter;
@Bean ( "authorizeFilterBean" ) public FilterRegistrationBean authorizeFilterBean() { FilterRegistrationBean registration = new FilterRegistrationBean(); registration.setFilter(authorizeFilter); registration.addUrlPatterns( new String[]{ "*.htm" , "*.html" }); registration.setName( "authorizeFilter" ); registration.setAsyncSupported( true ); return registration; }
} |
启动类加上：@ServletComponentScan({[com.hybase.site.filter]})
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原文链接：https://blog.csdn.net/wkh___/article/details/120221831
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