Cannot resolve org.postgresql:postgresql:42.5.5

"Cannot resolve org.postgresql:postgresql:42.5.5" 错误通常表示在项目中无法解析 org.postgresql:postgresql:42.5.5 依赖项。这通常是由于缺少依赖项或网络问题引起的。

要解决此问题，你可以尝试以下步骤：

1. 确保你的项目中有正确的依赖项，即 org.postgresql:postgresql:42.5.5。你可以在 pom.xml 文件中添加以下依赖项：

<dependency>
    <groupId>org.postgresql</groupId>
    <artifactId>postgresql</artifactId>
    <version>42.5.5</version>
</dependency>

2. 检查你的项目是否能够访问 Maven 中央存储库。你可以尝试从命令行运行 "mvn clean install" 命令，以确保你的项目可以正确访问 Maven 中央存储库。

3. 如果你的项目正在使用代理服务器，请确保代理服务器配置正确，并且可以访问 Maven 中央存储库。

相关问题

Error querying database. Cause: org.postgresql.util.PSQLException: 错误: 关系 "review_project_file" 不存在

Translation: Error querying database. Cause: org.postgresql.util.PSQLException: Error: relation "review_project_file" does not exist.

This error message suggests that the database is unable to find a table or relation called "review_project_file". The possible reasons for this error could be that the table has been deleted or renamed, or there is a typo in the query. To resolve this issue, the database administrator or developer should check the database schema and verify the table's existence and correct name.

error while loading shared libraries: libpq.so.5: cannot open shared object file: No such file or directory

This error occurs when the system is unable to locate the required shared library file "libpq.so.5". This file is part of the PostgreSQL database client library. To resolve this issue, you can follow the steps below:

1. Check if PostgreSQL is installed on your system. If not, you need to install it.
- On Ubuntu, you can use the following command to install PostgreSQL:

     sudo apt-get install postgresql

2. Once PostgreSQL is installed, you might need to reinstall the PostgreSQL client package to ensure all the necessary files are present:
- On Ubuntu, you can use the following command to reinstall the client package:

     sudo apt-get install --reinstall libpq5

3. If the issue persists, it's possible that the library file is located in a non-standard path. In that case, you can try adding the path to the `LD_LIBRARY_PATH` environment variable:

   export LD_LIBRARY_PATH=/path/to/pg_lib:$LD_LIBRARY_PATH

Replace "/path/to/pg_lib" with the actual path where the "libpq.so.5" file is located.

4. Finally, if none of the above steps solve the problem, you may need to manually create a symbolic link to the library file in one of the standard library directories:

   sudo ln -s /path/to/libpq.so.5 /usr/lib/libpq.so.5

Replace "/path/to/libpq.so.5" with the actual path where the library file is located.

Please note that these steps may vary depending on your operating system and distribution. Make sure to adapt them accordingly.