多租户ERP
数据隔离技术架构

public class TenantContextHolder {
    private static final ThreadLocal<String> tenantId =
        new ThreadLocal<>();

    public static void setTenantId(String id) {
        tenantId.set(id);
    }

    public static String getTenantId() {
        return tenantId.get();
    }

    public static void clear() {
        tenantId.remove();
    }
}

@Component
public class TenantInterceptor implements HandlerInterceptor {

    @Override
    public boolean preHandle(HttpServletRequest request,
                              HttpServletResponse response,
                              Object handler) {
        // 从请求头获取租户ID
        String tenantId = request.getHeader("X-Tenant-ID");

        if (tenantId != null) {
            TenantContextHolder.setTenantId(tenantId);
        }
        return true;
    }
}

public class DataSourceRouter extends AbstractRoutingDataSource {

    @Override
    protected Object determineCurrentLookupKey() {
        // 根据租户ID动态切换数据源
        String tenantId = TenantContextHolder.getTenantId();
        return "tenant_" + tenantId;
    }
}