java调用matlab

近期需要java调用matlab程序，花了大半天时间终于完成了一个小程序的测试，与大家分享一下成果

一、在MATLAB中编辑operation.m,

%定义一个函数operation(a,b),求a与b的加减乘除运算，并返回结果

%函数定义function 输出变量列表[s,m,...] 函数名（输入变量列表）sum,sub,mul,div中

function [sum,sub,mul,div] = operation(a,b);

sum = a + b;

sub = a - b;

mul = a * b;

div = a / b;

end

 

二、生成Java调用文件

Matlab命令中输入deploytool,新建一个matlab builder ja文件，在operationclass中添加operation.m文件，点击bulid the project,生成一个供java调用的文件夹结构如下：

Operation -----|----distrib

|     |-----operation.jar

|       |-----readme.txt

                |

                 -------src

                  |           |----operation

                  |                   |----operationclass.java

                  |                   |----operationMCRFactory.java

                                      |----operationclassRemote.java

               |           |----classes

                  |                   |----operation

                  |                                    |----operation.ctf

                  |                                   |---- operationclass$1.class

                                                      |---- operationclass.class

                                                      |---- operationclassRemote.class

                                                      |---- operationMCRFactory.class

|-------build.log

|-------operation.ctf

| -------operation.jar

|-------mccExcludedFiles.log

|-------readme.txt

 

三、Java中建立一个java project工程JavaTestMatlab，导入两个库文件javabuilder.jar（C:\ProgramFiles

      \toolbox\javabuilder\jar）和operation.jar(D:\My Documents\MATLAB\operation\distrib\ operation.jar)，

   编写java程序JavaTestMatlab.java程序如下：

 

/*java 调用matlab程序
* author:farseer
* EMail:[e-mail]
* 从键盘输入两个整数，调用operation.m中的函数operation(a,b)，求出两个数的各、差、积、商并输出
*/
import operation.*;
import java.util.Scanner;
class JavaTestMatlab
{
    public static void main(String[] args)
    {
        Object result[] = null;    /* object是所有类的父类public Object[] operation(int nargout, Object... rhs) */
        operationclass myAdd = null;     /* Stores myadd class instance */
        try
        {
            int a,b;
        myAdd = new operationclass();
       
            System.out.println("从键盘输入两个操作数：");
            System.out.print("      输入第一个操作数：");
           Scanner scan = new Scanner(System.in);   //从控制台读入输入的整数
            a = scan.nextInt();       //从控制台输入第一个操作数
           System.out.print("      输入第二个操作数: ");
            b = scan.nextInt();     //从控制台输入第二个操作数
          
            result = myAdd.operation(4,a,b); //operation(4,a,b)中第一个参数是返回值的个数 ，a是第一个输入参数,b是第二个输入参数
            System.out.print("The sum of " + Integer.toString(a) + " and " + Integer.toString(b) + " is: ");
            System.out.println(result[0]);
            System.out.print("The sub of " + Integer.toString(a) + " and " + Integer.toString(b) + " is: ");
            System.out.println(result[1]);
            System.out.print("The mul of " + Integer.toString(a) + " and " + Integer.toString(b) + " is: ");
            System.out.println(result[2]);
            System.out.print("The div of " + Integer.toString(a) + " and " + Integer.toString(b) + " is: ");
            System.out.println(result[3]);
       }
        catch (Exception e)
        {
            System.out.println(e);
        }     
    }
}

 

测试结果如下：

从键盘输入两个操作数：

      输入第一个操作数：55

      输入第二个操作数: 22

The sum of 55 and 22 is: 77

The sub of 55 and 22 is: 33

The mul of 55 and 22 is: 1210

The div of 55 and 22 is: 3

 

四、 错误调试

1.    安装matlab不完整，没有toolbox\javabuilder下的文件

2.    环境变量中classpath中添加两个jar文件的路径