在JNI中使用参数调用Java方法 [英] call java methods with argumenrs in JNI

问题描述

我正在开发JNI程序，但无法从C ++程序中调用Java方法.

I am working on JNI program and I am not able to call a java method from my C++ program.

java方法的代码段在这里

The code snippet of java method is here

public static void getTables(Connection conn) throws Exception {

    String TABLE_NAME = "TABLE_NAME";
    String TABLE_SCHEMA = "TABLE_SCHEM";
    String[] TABLE_TYPES = {"TABLE"};
    DatabaseMetaData dbmd = conn.getMetaData();

    ResultSet tables = dbmd.getTables(null, null, null, TABLE_TYPES);
    while (tables.next()) {
      System.out.println(tables.getString(TABLE_NAME));
          System.out.println(tables.getString(TABLE_SCHEMA));
    }
  }

我想从C ++程序中调用此java方法.

And I want to call this java method from C++ program.

我可以调用main方法 因为代码是

I am able to call the main method for that the code is

midMain       = env->GetStaticMethodID(clsH, "main", "([Ljava/lang/String;)V");

我想这样调用getTables方法.请帮我解决.

I want to call getTables method like this. Please help me to solve it.

推荐答案

请参阅 https://stackoverflow.com/a/14872927/755804 可能是这些: https://stackoverflow.com/a/14021142/755804 https://stackoverflow.com/a/15941319/755804 https://stackoverflow.com/a/21109940/755804

Please see https://stackoverflow.com/a/14872927/755804 and probably these: https://stackoverflow.com/a/14021142/755804 https://stackoverflow.com/a/15941319/755804 https://stackoverflow.com/a/21109940/755804

调用静态方法和非静态方法之间有一些区别，但差别不大. 我建议您从一些可行的方法开始，然后逐渐将其更改为所需的内容.

There is some difference between calling static and non-static methods, but not much. I suggest you start with something that works and gradually change it to what you want.

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