发表于： 2018-10-13 23:19:17

1 468

今天完成的事情

支付宝支付demo

官方文档这么说的：

跟之前的不一样，之前是调接口获取返回值，这次是自己写一个页面

因为是使用spring boot做的，官方SDK又是jsp，只能自己琢磨

想着用过滤器？让这个请求直接不进入controller，在过滤器中直接返回一个页面

但是我把AlipayClient作为Bean使用的，过滤器加载是在spring之前，所以会报空指针

那就拦截器？

开始动手

拦截器：



/**
 * @ClassName MyFilter
 * @author: UU
 * @Description: TODO
 * @Version 1.0
 */
@Component
public class PayInterceptor implements HandlerInterceptor {
    @Autowired
    AlipayUtil alipayUtil;

    @Override
    public boolean preHandle(HttpServletRequest httpServletRequest, HttpServletResponse httpServletResponse, Object o) throws Exception {


        this.turnPay(httpServletRequest, httpServletResponse);
        //只有返回true才会继续向下执行，返回false取消当前请求
        System.out.println("myinterc prehandler");
        return false;
    }

    @Override
    public void postHandle(HttpServletRequest httpServletRequest, HttpServletResponse httpServletResponse, Object o, ModelAndView modelAndView) throws Exception {

        System.out.println("myinterc posthandler");
    }

    @Override
    public void afterCompletion(HttpServletRequest httpServletRequest, HttpServletResponse httpServletResponse, Object o, Exception e) throws Exception {

        System.out.println("myinterc aftercompletion");
    }


    public void turnPay(HttpServletRequest httpRequest,
                        HttpServletResponse httpResponse) throws ServletException, IOException {
        alipayUtil.pay(httpRequest, httpResponse);
    }

}

添加配置拦截器

/**
 * @ClassName MyAdapter
 * @author: UU
 * @Description: TODO
 * @Version 1.0
 */

import org.springframework.web.servlet.config.annotation.InterceptorRegistry;
import org.springframework.web.servlet.config.annotation.WebMvcConfigurerAdapter;

/**
 * 继承WebMvcConfigureAdapter继承并重写addInterceptor方法用于添加配置拦截器
 *
 * @author chengxi
 */
public class MyAdapter extends WebMvcConfigurerAdapter {

    @Override
    public void addInterceptors(InterceptorRegistry registry) {

        //添加拦截器
        registry.addInterceptor(new PayInterceptor())
                .addPathPatterns("/alipay");
        super.addInterceptors(registry);
    }
}

但是昨晚的AlipayUtil是无法注入的，而且也无法import

然后灵光一闪

controller返回值为空呢？

直接调用response.getWritter.write()写上去不就好了？


/**
 * @ClassName PayController
 * @author: UU
 * @Description: TODO
 * @Version 1.0
 */
@SuppressWarnings("all")
@RestController
public class PayController {
    @Autowired
    AlipayClient alipayClient;

    @RequestMapping(value = "pay", method = RequestMethod.GET)
    void turnToPay(HttpServletRequest httpRequest, HttpServletResponse httpResponse) throws IOException {
        AlipayTradePagePayRequest alipayRequest = new AlipayTradePagePayRequest();//创建API对应的request
        alipayRequest.setReturnUrl("http://domain.com/CallBack/return_url.jsp");
        alipayRequest.setNotifyUrl("http://domain.com/CallBack/notify_url.jsp");//在公共参数中设置回跳和通知地址
        alipayRequest.setBizContent("{" +
                "    \"out_trade_no\":\"20150320010101001\"," +
                "    \"product_code\":\"FAST_INSTANT_TRADE_PAY\"," +
                "    \"total_amount\":88.88," +
                "    \"subject\":\"Iphone6 16G\"," +
                "    \"body\":\"Iphone6 16G\"," +
                "    \"passback_params\":\"merchantBizType%3d3C%26merchantBizNo%3d2016010101111\"," +
                "    \"extend_params\":{" +
                "    \"sys_service_provider_id\":\"2088511833207846\"" +
                "    }" +
                "  }");//填充业务参数
        String form = "";
        //调用SDK生成表单
        try {
            form = alipayClient.pageExecute(alipayRequest).getBody();
        } catch (AlipayApiException e) {
            e.printStackTrace();
        }
        httpResponse.setContentType("text/html;charset=" + "utf-8");
        //直接将完整的表单html输出到页面
        httpResponse.getWriter().write(form);
        httpResponse.getWriter().flush();
        httpResponse.getWriter().close();

    }

    @RequestMapping(value = "alipay", method = RequestMethod.GET)
    void turnToPay2() throws IOException {


    }

成功：

但是拦截器那个没有成功

明天计划的事情

完善剩下的

遇到的问题

昨晚遇到的问题：AlipayUtil是作为Component注入的，但是无法Autowired，甚至无法import

刚刚又试了一下好了…莫名其妙

收获

spring boot 配置bean：

@Bean 的用法

@Bean 是一个方法级别上的注解，主要用在 @Configuration 注解的类里，也可以用在 @Component 注解的类里。添加的 bean 的 id 为方法名


@Configuration
public class AliPayConfig {
    //支付宝网关
    @Value("${AliPayConfig.url}")
    private String url;
    // 应用ID
    @Value("${AliPayConfig.app_id}")
    private String app_id;
    // 商户私钥
    @Value("${AliPayConfig.merchant_private_key}")
    private String merchant_private_key;
    //参数返回格式
    @Value("${AliPayConfig.format}")
    private String format;
    // 字符编码格式
    @Value("${AliPayConfig.charset}")
    private String charset;
    // 支付宝公钥
    @Value("${AliPayConfig.alipay_public_key}")
    private String alipay_public_key;
    //商户生成签名字符串所使用的签名算法类型
    @Value("${AliPayConfig.sign_type}")
    private String sign_type;

    @Bean("alipayClient")
    public AlipayClient alipayClientBean() {

        return new DefaultAlipayClient(url, app_id, merchant_private_key, format, charset, alipay_public_key, sign_type);
    }


}

还可以指定作用域：

@Bean("alipayClient")
@Scope("singleton")
public AlipayClient alipayClientBean() {

    return new DefaultAlipayClient(url, app_id, merchant_private_key, format, charset, alipay_public_key, sign_type);
}

还有spring boot 如何自定义过滤器：

添加WebFilter注解

@WebFilter(urlPatterns = "/*", filterName = "myfilter")
public class MyFilter implements Filter {

    @Override
    public void init(FilterConfig filterConfig) throws ServletException {
        System.out.println("Filter初始化中");
    }

    @Override
    public void doFilter(ServletRequest servletRequest, ServletResponse servletResponse, FilterChain filterChain) throws IOException, ServletException {

        System.out.println("开始进行过滤处理");
        //调用该方法后，表示过滤器经过原来的url请求处理方法
        filterChain.doFilter(servletRequest, servletResponse);
    }

    @Override
    public void destroy() {
        System.out.println("Filter销毁中");
    }
}