spring security 完整项目实例

package main.filter; import java.io.IOException; import javax.servlet.Filter; import javax.servlet.FilterChain; import javax.servlet.FilterConfig; import javax.servlet.ServletException; import javax.servlet.ServletRequest; import javax.servlet.ServletResponse; import org.springframework.security.access.SecurityMetadataSource; import org.springframework.security.access.intercept.AbstractSecurityInterceptor; import org.springframework.security.access.intercept.InterceptorStatusToken; import org.springframework.security.web.FilterInvocation; import org.springframework.security.web.access.intercept.FilterInvocationSecurityMetadataSource; public class MySecurityFilter extends AbstractSecurityInterceptor implements Filter { //与applicationContext-security.xml里的myFilter的属性securityMetadataSource对应， //其他的两个组件，已经在AbstractSecurityInterceptor定义 private FilterInvocationSecurityMetadataSource securityMetadataSource; @Override public SecurityMetadataSource obtainSecurityMetadataSource() { return this.securityMetadataSource; } public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain) throws IOException, ServletException { FilterInvocation fi = new FilterInvocation(request, response, chain); invoke(fi); } private void invoke(FilterInvocation fi) throws IOException, ServletException { // object为FilterInvocation对象 //super.beforeInvocation(fi);源码 //1.获取请求资源的权限 //执行Collection<ConfigAttribute> attributes = SecurityMetadataSource.getAttributes(object); //2.是否拥有权限 //this.accessDecisionManager.decide(authenticated, object, attributes); InterceptorStatusToken token = super.beforeInvocation(fi); try { fi.getChain().doFilter(fi.getRequest(), fi.getResponse()); } finally { super.afterInvocation(token, null); } } public FilterInvocationSecurityMetadataSource getSecurityMetadataSource() { return securityMetadataSource; } public void setSecurityMetadataSource(FilterInvocationSecurityMetadataSource securityMetadataSource) { this.securityMetadataSource = securityMetadataSource; } public void init(FilterConfig arg0) throws ServletException { // TODO Auto-generated method stub } public void destroy() { // TODO Auto-generated method stub } @Override public Class<? extends Object> getSecureObjectClass() { //下面的MyAccessDecisionManager的supports方面必须放回true,否则会提醒类型错误 return FilterInvocation.class; } }