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README
GPL-2.0

dilib 简易接口访问工具

项目依赖包

  • cglib 3.2.0
  • gson 2.6.1
  • httpclient 4.5.1
  • commons-logging 1.2

API文档

1. package com.loong.dilib

  • ApiFactory
    • Api实体工厂类
    • 方法:
    • Object createApi(String className) 创建API实体对象
    • <T> T createApi(Class<T> targetClass) 创建API实体对象
  • ApiProxyFactory
    • Api代理工厂类
    • setCache(ApiCache cache) 添加缓存处理器
    • setShowLog(Boolean showLog) 是否打印日志(默认不打印)
    • createApiProxy() 创建Api代理类

2. package com.loong.dilib.annotation

  • @ DIRequest
    • 接口请求注释
    • 用于 API接口类、API接口方法
    • DIRequest.Method
      • 请求方式类型
      • GET(默认)、POST
  • @ DIResponse
    • 接口响应注释
    • 用于 API接口类、API接口方法
    • DIResponse.Type
      • 响应格式化类型
      • STRING - 字符串响应类型(不用使用,API接口方法直接返回String类型即可)
      • JSON - JSON格响应式类型(默认)
      • JSONP - JSONP格式响应类型
      • XML - XML响应类型(暂不支持)
  • @ DIHeader
    • 请求头部信息注释
    • 用于 API接口方法参数注释
  • @ DICookie
    • 请求Cookie信息注释
    • 用于 API接口方法参数注释
  • @ DIJson
    • 请求体JSON参数注释
    • 用于 API接口方法参数注释
  • @ DIPath
    • REST参数注释
    • 用于 API接口方法参数注释
  • @ DIParam
    • 请求参数注释
    • 用于 API接口方法参数注释
    • 主要用于标明简单访问参数的参数名
  • @ DICache
    • 缓存配置注释
    • 用于 API接口类、API接口方法
    • 缓存时间单位:秒

3. package com.loong.dilib.exception

  • DIAnnotationException
    • API接口注释异常
    • 如果API接口注释有问题,会直接在API创建时抛出
  • DIConnectException
    • 接口访问失败异常,接口访问失败时抛出
  • DIFormatException
    • 响应信息格式化异常,接口响应后,响应体格式化失败时抛出

4. package com.loong.dilib.cache

  • ApiCache
    • API缓存处理类接口
  • AbstractApiCache
    • API缓存处理抽象类
    • 实现了 buildKey() 方法
  • MemoryApiCache
    • 简单内存缓存处理器

使用说明

简单例子:

API接口类:

public interface TestApi {

    @DIRequest("http://xxx/test")
    public String test(@DIParam("p") int value);
    
    @DIRequest("http://xxx/test2")
    public String test2(Bean bean);
}
public class Bean {

    private String p1;
    private String p2;
    
    // get set
    // ......
}

简单使用:

TestApi api = ApiFactory.createApi(TestApi.class);
String html = api.test(1);

Bean bean = new Bean();
bean.setP1("111");
bean.setP2("222");
String htnl2 = api.test2(bean);
  1. 调用 api.test(1) 相当于GET方式访问 http://xxx/test?p=1
  2. 调用 api.test2(bean) 相当于GET方式访问 http://xxx/test2?p1=111&p2=222

Spring环境下:

<bean id="testApi" class="com.loong.dilib.ApiFactory" factory-method="createApi">
    <constructor-arg value="com.test.TestApi" />
</bean>
@Service
public interface Test {

    @Resource
    private TestApi api;

    public String test() {
    
        String html = api.test(1);
    }
}

复杂点的例子:

@DIRequest("http://xxx")
@DIResponse(Type.JSONP)
public interface TestApi {

    @DIRequest(value = "test", method = DIRequest.Method.POST)
    @DIResponse
    @DICache(3600)
    public Result<Test> test(
        @DIHeader Map<String, ?> h1,
        @DIHeader HBean h2,
        @DIHeader("xxx") String h3,
        @DICookie Map<String, ?> c1,
        @DICookie CBean c2,
        @DICookie("xxx") String c3,
        @DIJson PBean p
    );

    @DIRequest(value = "test2", method = DIRequest.Method.POST, charset = "GBK")
    @DICache(60)
    public Map<String, Linked<Test2>> test2(
        @DIHeader Map<String, ?> h1,
        @DIHeader HBean h2,
        @DIHeader("xxx") String h3,
        @DICookie Map<String, ?> c1,
        @DICookie CBean c2,
        @DICookie("xxx") String c3,
        Map<String, ?> p1,
        PBean p2,
        @DIParam("xxx") String p3
    );

    @DIRequest(value = "test3/{xxx}/{x2}/{x3}", method = DIRequest.Method.POST)
    public Map<String, Linked<Test2>> test3(
        @DIHeader HBean h,
        @DICookie CBean c,
        PBean p,
        @DIPath Map<String, ?> path1,
        @DIPath PathBean path2,
        @DIPath("xxx") String path3,
    );
}

说明:

  1. @DIHeader
    • 标明方法参数是请求头
    • 一个方法里可以有多个
    • 使用方式:
      • example(@DIHeader Map<String, ?> h)
      • example(@DIHeader Bean h)
      • example(@DIHeader("name") String h)
  2. @DICookie
    • 标明方法参数是请求Cookie
    • 一个方法里可以有多个
    • 使用方式:
      • example(@DICookie Map<String, ?> c)
      • example(@DICookie Bean c)
      • example(@DICookie("name") int c)
  3. @DIPath
    • 标明方法参数是REST参数
    • 一个方法里可以有多个
    • 参数会通过 name 替换 @DIRequest 中访问路径被标识 {name} 的值
    • 多余的字段会被忽略(没有找到对应的{name}
    • 使用方式:
      • example(@DIPath Map<String, ?> p)
      • example(@DIPath Bean p)
      • example(@DIPath("name") String p)
  4. 访问请求参数
    • @Param 注释 或 没有被 @DIHeader@DICookie@DIPath 注释的字段,都会被认定为是请求参数
    • 一份方法里可以有多个
    • 使用方式:
      • example(Map<String, ?> p)
      • example(Bean p)
      • example(@Param("name") String p)
  5. @DIJson
    • 一般用于复杂请求参数的传递
    • 被注释的参数会转换为 Json 格式,加入到 Request Body 里面
    • 只能在 POST 方式中使用
    • 会自动添加头部信息 Content-Type = application/json
    • 一个方法里只能有一个
    • 使用方式:
      • example(@DIJson Map<String, ?> p)
      • example(@DIJson Bean p)
  6. @DIRequest
    • 用户注释请求路径及请求方式
    • 接口类上的 @DIRequestmethodcharset 参数无效,只有接口方法上的有效
    • DIRequest.Method.GET 为默认请求方式
    • 默认编码方式为 UTF-8
  7. @DIResponse
    • 如果接口方法的返回类型为 String,会将 Response Body 的内容直接返回
    • 可以使用在接口类及接口方法上,若接口方法上没有使用,则会取接口类上的注释,接口类上没有使用则使用默认值
    • Type.JSON 是默认的处理方式
    • Type.JSONP 是针对 JSonp 接口的处理
  8. @DICache
    • 具体说明见下方

API实体类的创建方式

###方法一:

简单方式

TestApi api = ApiFactory.createApi(TestApi.class);
TestApi2 api2 = ApiFactory.createApi(TestApi2.class);

###方法二:

Api代理工厂方式创建

// 新建API代理工厂
ApiProxyFactory proxyFactory = new ApiProxyFactory();
// proxyFactory.setShowLog(true);

// 创建代理类
ApiProxy proxy = proxyFactory.createApiProxy();

TestApi api = proxy.createApi(TestApi.class);
TestApi2 api2 = proxy.createApi(TestApi2.class);

缓存配置

简单使用方式

  1. 在 API方法(或者API接口类)上添加 @DICache 注释(时间以秒为单位)
  2. 使用 API代理工厂方式创建 API实体处理类
  3. 在 API代理工厂中注入缓存处理器
// 缓存处理器
ApiCache apiCache = new MemoryApiCache();
// API代理工厂
ApiProxyFactory proxyFactory = new ApiProxyFactory();
proxyFactory.setCache(apiCache);

自定义缓存处理器

  1. 必须实现 ApiCache 接口或继承 AbstractApiCache 抽象类
  2. ApiCache 接口中包含三个方法:
    • buildKey(Object api, Method method, Object[] params) 构建存储键
    • put(Object api, Method method, String key, String html, int expire) 添加缓存
    • get(Object api, Method method, String key) 获取缓存
    • 参数:
      • Object api API接口实体类
      • Mehtod method API接口方法
      • Object[] params 方法访问参数集
      • String key通过 buildKey() 构建的缓存键
      • String html 接口响应信息
      • int expire 过期时间(秒)
  3. AbstractApiCache 抽象接口已实现了 buildKey() 方法
  4. MemoryApiCache 是已经写好的一个简单的缓存处理器,对于少量数据的情况可以直接使用。

备注:

  1. 最好还是使用 Redis 这样的 Key-Value数据库来保存缓存
  2. AbstractApiCache 现在的 buildKey() 还有待优化,主要是对于参数是Bean类型的,并且Bean里面包含Map或者Set的情况。
  3. AbstractApiCache 中构建的缓存键已经可以区分接口类和接口方法,因此如果用继承抽象类的方式,在 put()get() 中,可以直接忽略掉方法中的 Object apiMehtod method 参数(当然用来分类储存也可以)。
  4. ps: 其实参数 Object api 基本没啥用...从 Mehtod method 中其实可以取到接口类型的,暂时保留方便直接使用。

版本更新历史

  • 1.0.2
    • 新增缓存及缓存拓展机制
    • @DIRequest 注释中新增 charset() 编码设置
    • 新增 ApiProxyFactory API代理工厂类
    • 新增请求日志打印及打印设置
  • 1.0.1
    • 新增 REST 访问方式的处理
    • 废弃 @DIN 注释,新增 @DIParam 注释
    • 优化对 Map<String, ?> 的处理(以前只支持Map<String, String>
  • 1.0.0
    • 基础版本

新版本预期

  • 增加对 XML 的支持

鸣谢

  • 感谢 Longlive 提供了很多很好的修改建议。
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简介

强大的接口访问工具,可以大幅降低后台调用接口的工作量。支持JSON、JSONP等格式接口。 展开 收起
Java
GPL-2.0
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