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fix(wx-java-mp): 对齐 MiniApp 的 Redis host 默认值 - #4148
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| * 主机地址. | ||
| */ | ||
| private String host = "127.0.0.1"; | ||
| private String host; |
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在 wx.mp.config-storage.type=jedis/redisson 场景，此行把“省略 host”变成复用容器中客户端的配置契约，但该模块的 README.md 仍只给出显式的 host=127.0.0.1，当前字段说明也没有说明省略值需要现有客户端；发布后用户无法从随包文档得知新用法，并会在容器中没有相应 bean 时直到启动阶段才看到失败。请同步补充 host 的省略语义及前置条件。
AGENTS.md reference: AGENTS.md:L89-L89
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| * 主机地址. | ||
| */ | ||
| private String host = "127.0.0.1"; | ||
| private String host; |
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该修改通过把 host 默认值设为 null 来切换 WxMpInRedissonConfigStorageConfiguration 和 WxMpInJedisConfigStorageConfiguration 的 bean 查找分支，但受影响模块当前没有测试覆盖“省略 host 且容器已有客户端”的启动场景；以后默认值或分支改动时，原来的 NoSuchBeanDefinitionException 可以直接回归而 CI 无法发现。请添加最小 Spring 上下文回归测试，至少验证未配置 host 时会复用已有 RedissonClient，并覆盖同一字段影响的 Jedis 分支。
AGENTS.md reference: AGENTS.md:L64-L64
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🟢 Approval recommended
No active review issues are recorded for the Redis host-default change and its accompanying client-reuse documentation.
No open issues 🎉
What changed in this PR
本 PR 将公众号 Spring Boot Starter 的 Redis host 默认值改为 null，与 MiniApp 对齐，修复省略 host 时无法复用应用已有 RedissonClient 的初始化问题。
Changes:
- 移除
host的默认地址，使省略 host 的 Jedis/Redisson 模式复用容器中的对应客户端。 - 更新属性注释和 README，说明客户端复用行为，并区分显式配置示例与默认值。
验证：PR 描述记录了编译通过；本次未执行构建或测试。
| File | Description |
|---|---|
spring-boot-starters/wx-java-mp-spring-boot-starter/src/main/java/com/binarywang/spring/starter/wxjava/mp/properties/RedisProperties.java |
移除 host 默认值，并补充客户端复用说明。 |
spring-boot-starters/wx-java-mp-spring-boot-starter/README.md |
说明 host 为显式配置示例及省略时的行为。 |
Review effort: Balanced
变更
将公众号 Spring Boot Starter 的 Redis
host默认值改为null，与 MiniApp 对齐。应用已经提供RedissonClient时，只设置wx.mp.config-storage.type=redisson即可复用该客户端。MiniApp 的
RedisProperties.host没有初始值。省略 host 时，MiniApp 按类型查找应用已有的RedissonClient。MP 原有代码也有相同的回退分支，但默认的127.0.0.1会让查找误入专用客户端分支。此时wxMpRedissonClient因缺少 host 配置而没有注册，导致WxMpService初始化失败。显式配置有效 host 时，MP 仍由 Spring 创建并管理专用客户端。MP 的 Jedis 模式也使用同一个
host属性，省略 host 时会复用应用提供的JedisPool。验证
mvn -pl spring-boot-starters/wx-java-mp-spring-boot-starter -am -DskipTests compile编译通过。替代 #4147。