最近有个功能需要java与python之间的数据交互,java需要把参数传给python,然后python计算的结果返回给java.于是就写了一个工具类.
首先,maven 需要加载jython的依赖.工具类代码如下:
|
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
|
import java.util.list;import java.util.map;import java.util.properties;import org.apache.poi.ss.formula.functions.t;import org.python.core.pyfunction;import org.python.core.pyinteger;import org.python.core.pyobject;import org.python.core.pystring;import org.python.util.pythoninterpreter;/** * @classname: jythonutils * @description:todo(jython 工具类) * @author: zy * @date: * * @copyright: 2018 inc. all rights reserved. * 注意： */public class jythonutils { /** * @title: jythoninit * @description: todo(初始化jython) * @param: @return * @return: pythoninterpreter * @throws */ public static pythoninterpreter jythoninit(){ //初始化site 配置 properties props = new properties(); props.put("python.home", ""); //python lib 或 jython lib,根据系统中该文件目录路径 props.put("python.console.encoding", "utf-8"); props.put("python.security.respectjavaaccessibility", "false"); props.put("python.import.site", "false"); properties preprops = system.getproperties(); pythoninterpreter.initialize(preprops, props, new string[0]); //创建pythoninterpreter 对象 pythoninterpreter interp = new pythoninterpreter(); return interp; } /** * @title: loadpythonfile * @description: todo(加载python 源码文件，) * @param: @param interp * @param: @param filepath ，比如：f:\\jpython_jar\\jpythontest\\pythontest.py 或/testpython/test.py * @param: @return * @return: pythoninterpreter * @throws */ public static pythoninterpreter loadpythonfile(pythoninterpreter interp, string filepath){ interp.execfile(filepath); return interp; } /** * @title: loadpythonfunc * @description: todo(加载python 源码文件中的某个方法) * @param: @param interp * @param: @param functionname * @param: @return * @return: pyfunction * @throws */ public static pyfunction loadpythonfunc(pythoninterpreter interp, string functionname){ //加载方法 pyfunction func = (pyfunction) interp.get(functionname,pyfunction.class); return func; } /** * @title: execfunc * @description: todo(执行无参方法,返回pyobject) * @param: @param func * @return: pyobject * @throws */ public static pyobject execfunc(pyfunction func){ pyobject pyobj = func.__call__(); return pyobj; } /** * @title: execfunctostring * @description: todo(执行无参方法,返回一个字符串) * @param: @param func * @param: @return * @return: string * @throws */ public static string execfunctostring(pyfunction func){ pyobject pyobj = execfunc(func); return (string) pyobj.__tojava__(string.class); } /** * @title: execfunctostring * @description: todo(执行有参方法,返回一个字符串) * @param: @param func * @param: @param paramname ，参数名 * @param: @return * @return: string * @throws */ public static string execfunctostring2(pyfunction func, string paramname){ pyobject pyobj = func.__call__(new pystring(paramname)); return (string) pyobj.__tojava__(string.class); } /** * @title: execfunctointeger * @description: todo(执行无参方法,返回一个integer) * @param: @param func * @param: @return * @return: integer * @throws */ public integer execfunctointeger(pyfunction func){ pyobject pyobj = execfunc(func); return (integer) pyobj.__tojava__(integer.class); } /** * @title: execfunctolist * @description: todo(执行无参方法,返回一个list) * @param: @param func * @param: @return * @return: list<t> * @throws */ public list<t> execfunctolist(pyfunction func){ pyobject pyobj = execfunc(func); return (list<t>) pyobj.__tojava__(list.class); } /** * @title: execfunctomap * @description: todo(执行无参方法,返回一个map<string, object>) * @param: @param func * @param: @return * @return: map<string,object> * @throws */ public map<string, object> execfunctomap(pyfunction func){ pyobject pyobj = execfunc(func); return (map<string, object>) pyobj.__tojava__(map.class); } public void execfunctobyparamslist(pyfunction func, list<t> paramslist){ } public static void main(string[] args){ pythoninterpreter interp = jythoninit(); //文件名 string filepath = "f:\\jpython_jar\\jpythontest\\pythontest.py"; interp = loadpythonfile(interp, filepath); //函数名 string functionname = "count"; pyfunction func = loadpythonfunc(interp, functionname); //执行无参方法，返回pyobject pyobject pyobj = execfunc(func); //执行无参方法，返回string string resultstr = execfunctostring(func); //执行有参方法，返回string string paramname = "name"; string resultstr2 = execfunctostring2(func, paramname); }} |
总结
以上就是这篇文章的全部内容了，希望本文的内容对大家的学习或者工作具有一定的参考学习价值，谢谢大家对服务器之家的支持。如果你想了解更多相关内容请查看下面相关链接
原文链接：https://blog.csdn.net/cafebar123/article/details/79394431
