HelloJNI - Rising Sun

HelloJNI

写给自己看看
java --HelloJNI ---

import java.io.UnsupportedEncodingException;

public class HelloJNI {

static {

System.loadLibrary("HelloJNI"); // hello.dll (Windows) or libhello.so (Unixes)

}

// A native method that receives nothing and returns void

private native void sayHello();

private native double sayOK(String dd);

private native void getFileGdb(String path);

private native String getFileGdbStr(String path);

private native GeodbEntity getGdbTable(GeodbEntity geo);

/**

* @param args

* @throws UnsupportedEncodingException

/**

* @param args

* @throws UnsupportedEncodingException

public static void main(String[] args) throws UnsupportedEncodingException {

// System.out.println( System.getProperty("java.library.path"));

HelloJNI hello = new HelloJNI();

// hello.sayHello(); // invoke the native method

// System.out.println(hello.sayOK("Apple"));

//hello.getFileGdb("D:/cpp/FileGDB_API_VS2012_1_3/samples/data/ExecuteSQL.gdb");

//GeodbEntity dd= hello.getGdbTable("D:/cpp/FileGDB_API_VS2012_1_3/samples/data/ExecuteSQL.gdb","dd");

GeodbEntity dd= new GeodbEntity();

dd.setTable("D:/cpp/FileGDB_API_VS2012_1_3/samples/data/ExecuteSQL.gdb 阿切尔");

hello.getGdbTable(dd);

System.out.println("java"+dd.getSrid());

for(int i=0;i<dd.getFieldValues().size();i++){

System.out.println(dd.getFieldValues().get(i));

}

// System.out.println(hello.getFileGdbStr("D:/cpp/FileGDB_API_VS2012_1_3/samples/data/ExecuteSQL.gdb"));

}

}
-----GeodbEntity ----

import java.util.List;

import java.util.ArrayList;

public class GeodbEntity {

//输入

private String table;

private String eodbPath;

//输出

/**列字段##隔开*/

private String Fields;

/**数据表##隔开*/

private ArrayList<String> FieldValues=new ArrayList<String>();

/**空间参考标识符*/

private String srid;

/**维度*/

private String dimension;

public String getTable() {

return table;

}

public void setTable(String table) {

this.table = table;

}

public String getEodbPath() {

return eodbPath;

}

public void setEodbPath(String eodbPath) {

this.eodbPath = eodbPath;

}

public String getSrid() {

return srid;

}

public void setSrid(String srid) {

this.srid = srid;

}

public String getDimension() {

return dimension;

}

public void setDimension(String dimension) {

this.dimension = dimension;

}

public String getFields() {

return Fields;

}

public void setFields(String fields) {

Fields = fields;

}

public ArrayList<String> getFieldValues() {

return FieldValues;

}

public void setFieldValues(ArrayList<String> fieldValues) {

FieldValues = fieldValues;

}

public String toString() {

return Fields;

}

--c++

hellojni.h

#define _Included_HelloJNI

#ifdef __cplusplus

extern "C" {

#endif

* Class: HelloJNI

* Method: sayHello

* Signature: ()V

JNIEXPORT void JNICALL Java_HelloJNI_sayHello

(JNIEnv *, jobject);

* Class: HelloJNI

* Method: sayOK

* Signature: (Ljava/lang/String;)D

JNIEXPORT jdouble JNICALL Java_HelloJNI_sayOK

(JNIEnv *, jobject, jstring);

* Class: HelloJNI

* Method: getFileGdb

* Signature: (Ljava/lang/String;)V

JNIEXPORT void JNICALL Java_HelloJNI_getFileGdb

(JNIEnv *, jobject, jstring);

* Class: HelloJNI

* Method: getFileGdbStr

* Signature: (Ljava/lang/String;)Ljava/lang/String;

JNIEXPORT jstring JNICALL Java_HelloJNI_getFileGdbStr

(JNIEnv *, jobject, jstring);

* Class: HelloJNI

* Method: getGdbTable

* Signature: (LGeodbEntity;)LGeodbEntity;

JNIEXPORT jobject JNICALL Java_HelloJNI_getGdbTable

(JNIEnv *, jobject, jobject);

#ifdef __cplusplus

}

#endif

----------hello c++------

#include <jni.h>

#include <stdio.h>

#include <iostream>

#include <string.h>

#include "HelloJNI.h"

#include <fstream>

#include <time.h>

#include <FileGDBAPI.h>

using namespace std;

using namespace FileGDBAPI;

using namespace std;

JNIEXPORT void JNICALL Java_HelloJNI_sayHello(JNIEnv *env, jobject thisObj) {

printf("Hello World!\n");

return;

}

JNIEXPORT jdouble JNICALL Java_HelloJNI_sayOK

(JNIEnv* env, jobject obj, jstring name){

const char* pname=env->GetStringUTFChars(name,NULL);

if(strcmp(pname,"Apple")==0){

env->ReleaseStringUTFChars(name,pname);

cout<<"After release:"<<pname<<endl;

return 1.2;

}

else{

env->ReleaseStringUTFChars(name,pname);

cout<<"After release:"<<pname<<endl;

return 2.1;

}

JNIEXPORT jstring JNICALL Java_HelloJNI_getFileGdbStr

(JNIEnv *env, jobject thisObj, jstring path){

/* fgdbError hr;

wstring errorText;

Geodatabase geodatabase;

std::wstring value;

const jchar* raw = env->GetStringChars(path, NULL);

if (raw != NULL) {

jsize len = env->GetStringLength(path);

value.assign(raw, raw + len);

env->ReleaseStringChars(path, raw);

}

if ((hr = OpenGeodatabase(value, geodatabase)) != S_OK)

{

wcout << "An error occurred while opening the geodatabase." << endl;

ErrorInfo::GetErrorDescription(hr, errorText);

wcout << errorText << "(" << hr << ")." << endl;

return (env)->NewStringUTF("7");

}

Row attrQueryRow;

EnumRows attrQueryRows;

wstring sqlStatement(L"SELECT * FROM Cities WHERE TYPE = 'city' AND OBJECTID < 10");

if ((hr = geodatabase.ExecuteSQL(sqlStatement, true, attrQueryRows)) != S_OK)

{

wcout << "An error occurred while performing the attribute query." << endl;

ErrorInfo::GetErrorDescription(hr, errorText);

wcout << errorText << "(" << hr << ")." << endl;

return (env)->NewStringUTF("7");

}

FieldInfo fieldInfo;

attrQueryRows.GetFieldInformation(fieldInfo);

int fieldCount;

FieldType fieldType;

wstring fieldName;

// Iterate through the returned rows printing out all field values.

short shortField;

int32 longField;

float floatField;

double doubleField;

string stringField;

wstring wstringField;

tm dateTimeField;

char datetime[80];

Guid globalIDField;

Guid guidField;

wstring strGuid;

wstring strGlobalID;

bool isNull;

byte * shapeBufferBytes ;

ShapeBuffer geometry;

ByteArray bss;

while (attrQueryRows.Next(attrQueryRow) == S_OK)

{

fieldInfo.GetFieldCount(fieldCount);

for (long fieldNumber = 0; fieldNumber < fieldCount; fieldNumber++)

{

fieldInfo.GetFieldType(fieldNumber, fieldType);

fieldInfo.GetFieldName(fieldNumber, fieldName);

attrQueryRow.IsNull(fieldName, isNull);

if (!isNull)

{

switch (fieldType)

{

case fieldTypeSmallInteger:

attrQueryRow.GetShort(fieldName, shortField);

wcout << shortField << endl;

break;

case fieldTypeInteger:

attrQueryRow.GetInteger(fieldName, longField);

wcout << longField << '\t';

break;

case fieldTypeSingle:

attrQueryRow.GetFloat(fieldName, floatField);

wcout << floatField << '\t';

break;

case fieldTypeDouble:

attrQueryRow.GetDouble(fieldName, doubleField);

wcout << doubleField << '\t';

break;

case fieldTypeString:

attrQueryRow.GetString(fieldName, wstringField);

wcout << wstringField << '\t';

break;

case fieldTypeDate:

attrQueryRow.GetDate(fieldName, dateTimeField);

strftime(datetime,80,"%a %b %d %I:%M:%S%p %Y", &dateTimeField);

wcout << datetime << '\t';

break;

case fieldTypeOID:

attrQueryRow.GetOID(longField);

wcout << longField << '\t';

break;

case fieldTypeGeometry:{

attrQueryRow.GetGeometry(geometry);

// attrQueryRow.GetBinary(fieldName, bss);

double x, y;

shapeBufferBytes = geometry.shapeBuffer;

wcout << "d::x::"<< x<<"y:"<<y<< '\t';;

wcout <<shapeBufferBytes<< "Geometry" << '\t';}

break;

case fieldTypeBlob:

wcout << "Blob" << '\t';

break;

case fieldTypeGUID:

attrQueryRow.GetGUID(fieldName, guidField);

guidField.ToString(strGuid);

wcout << strGuid << '\t';

break;

case fieldTypeGlobalID:

attrQueryRow.GetGlobalID(globalIDField);

globalIDField.ToString(strGlobalID);

wcout << strGlobalID << '\t';

break;

default:

break;

}

else

{

wcout << "null" << '\t';

}

wcout << endl;

}

attrQueryRows.Close(); // Close the EnumRows

const char * pat="zhy好棒呀第一个东东出来了";

//定义java String类 strClass

jclass strClass = (env)->FindClass("Ljava/lang/String;");

//获取String(byte[],String)的构造器,用于将本地byte[]数组转换为一个新String

jmethodID ctorID = (env)->GetMethodID(strClass, "<init>", "([BLjava/lang/String;)V");

//建立byte数组

jbyteArray bytes = (env)->NewByteArray(strlen(pat));

//将char* 转换为byte数组

(env)->SetByteArrayRegion(bytes, 0, strlen(pat), (jbyte*)pat);

// 设置String, 保存语言类型,用于byte数组转换至String时的参数

jstring encoding = (env)->NewStringUTF("GB2312");

//将byte数组转换为java String,并输出

return (jstring)(env)->NewObject(strClass, ctorID, bytes, encoding);

//return path;

}

JNIEXPORT void JNICALL Java_HelloJNI_getFileGdb(JNIEnv *env, jobject thisObj, jstring path) {

fgdbError hr;

wstring errorText;

Geodatabase geodatabase;

// const wchar_t * szStr =(wchar_t * )env->GetStringChars(path, NULL);

std::wstring value;

const jchar* raw = env->GetStringChars(path, NULL);

if (raw != NULL) {

jsize len = env->GetStringLength(path);

value.assign(raw, raw + len);

env->ReleaseStringChars(path, raw);

}

if ((hr = OpenGeodatabase(value, geodatabase)) != S_OK)

{

wcout << "An error occurred while opening the geodatabase." << endl;

ErrorInfo::GetErrorDescription(hr, errorText);

wcout << errorText << "(" << hr << ")." << endl;

return;

}

wstring sqlStatement(L"SELECT CITY_NAME, POP1990 FROM Cities WHERE TYPE = 'city' AND OBJECTID < 10");

EnumRows attrQueryRows;

if ((hr = geodatabase.ExecuteSQL(sqlStatement, true, attrQueryRows)) != S_OK)

{

wcout << "An error occurred while performing the attribute query." << endl;

ErrorInfo::GetErrorDescription(hr, errorText);

wcout << errorText << "(" << hr << ")." << endl;

return ;

}

// Iterate through the returned rows.

Row attrQueryRow;

int32 cityPop;

wstring cityName;

while (attrQueryRows.Next(attrQueryRow) == S_OK)

{

attrQueryRow.GetInteger(L"POP1990", cityPop);

attrQueryRow.GetString(L"CITY_NAME", cityName);

wcout << cityName << '\t' << cityPop << endl;

}

// SELECT * - Return all fields.

sqlStatement.assign(L"SELECT * FROM Cities WHERE TYPE = 'city' AND OBJECTID < 10");

if ((hr = geodatabase.ExecuteSQL(sqlStatement, true, attrQueryRows)) != S_OK)

{

wcout << "An error occurred while performing the attribute query." << endl;

ErrorInfo::GetErrorDescription(hr, errorText);

wcout << errorText << "(" << hr << ")." << endl;

return;

}

// Get the field type and name from the row enumerator.

FieldInfo fieldInfo;

attrQueryRows.GetFieldInformation(fieldInfo);

int fieldCount;

FieldType fieldType;

wstring fieldName;

// Iterate through the returned rows printing out all field values.

short shortField;

int32 longField;

float floatField;

double doubleField;

string stringField;

wstring wstringField;

tm dateTimeField;

char datetime[80];

Guid globalIDField;

Guid guidField;

wstring strGuid;

wstring strGlobalID;

bool isNull;

byte * shapeBufferBytes ;

ShapeBuffer geometry;

while (attrQueryRows.Next(attrQueryRow) == S_OK)

{

fieldInfo.GetFieldCount(fieldCount);

for (long fieldNumber = 0; fieldNumber < fieldCount; fieldNumber++)

{

fieldInfo.GetFieldType(fieldNumber, fieldType);

fieldInfo.GetFieldName(fieldNumber, fieldName);

attrQueryRow.IsNull(fieldName, isNull);

if (!isNull)

{

switch (fieldType)

{

case fieldTypeSmallInteger:

attrQueryRow.GetShort(fieldName, shortField);

wcout << shortField << endl;

break;

case fieldTypeInteger:

attrQueryRow.GetInteger(fieldName, longField);

wcout << longField << '\t';

break;

case fieldTypeSingle:

attrQueryRow.GetFloat(fieldName, floatField);

wcout << floatField << '\t';

break;

case fieldTypeDouble:

attrQueryRow.GetDouble(fieldName, doubleField);

wcout << doubleField << '\t';

break;

case fieldTypeString:

attrQueryRow.GetString(fieldName, wstringField);

wcout << wstringField << '\t';

break;

case fieldTypeDate:

attrQueryRow.GetDate(fieldName, dateTimeField);

strftime(datetime,80,"%a %b %d %I:%M:%S%p %Y", &dateTimeField);

wcout << datetime << '\t';

break;

case fieldTypeOID:

attrQueryRow.GetOID(longField);

wcout << longField << '\t';

break;

case fieldTypeGeometry:{

attrQueryRow.GetGeometry(geometry);

// attrQueryRow.GetBinary(fieldName, bss);

double x, y;

shapeBufferBytes = geometry.shapeBuffer;

memcpy(&x, geometry.shapeBuffer + 4, sizeof(x));

memcpy(&y, geometry.shapeBuffer + 12, sizeof(y));

//std::string *str3 = new std::string((char *)shapeBufferBytes);

wcout << "d::x::"<< x<<"y:"<<y<< '\t';;

wcout <<shapeBufferBytes<< "Geometry" << '\t';}

break;

case fieldTypeBlob:

wcout << "Blob" << '\t';

break;

case fieldTypeGUID:

attrQueryRow.GetGUID(fieldName, guidField);

guidField.ToString(strGuid);

wcout << strGuid << '\t';

break;

case fieldTypeGlobalID:

attrQueryRow.GetGlobalID(globalIDField);

globalIDField.ToString(strGlobalID);

wcout << strGlobalID << '\t';

break;

default:

break;

}

else

{

wcout << "null" << '\t';

}

wcout << endl;

}

attrQueryRows.Close(); // Close the EnumRows

// Close the geodatabase

if ((hr = CloseGeodatabase(geodatabase)) != S_OK)

{

wcout << "An error occurred while closing the geodatabase." << endl;

ErrorInfo::GetErrorDescription(hr, errorText);

wcout << errorText << "(" << hr << ")." << endl;

return ;

}

printf("Hello World geodatebase!\n");

return;

}

std::string jstring2str(JNIEnv* env, jstring jstr)

{

char* rtn = NULL;

jclass clsstring = env->FindClass("java/lang/String");

jstring strencode = env->NewStringUTF("GB2312");

jmethodID mid = env->GetMethodID(clsstring, "getBytes", "(Ljava/lang/String;)[B");

jbyteArray barr= (jbyteArray)env->CallObjectMethod(jstr,mid,strencode);

jsize alen = env->GetArrayLength(barr);

jbyte* ba = env->GetByteArrayElements(barr,JNI_FALSE);

if(alen > 0)

{

rtn = (char*)malloc(alen+1);

memcpy(rtn,ba,alen);

rtn[alen]=0;

}

env->ReleaseByteArrayElements(barr,ba,0);

std::string stemp(rtn);

free(rtn);

return stemp;

}

jstring str2jstring(JNIEnv* env,const char* pat)

{

//定义java String类 strClass

jclass strClass = (env)->FindClass("Ljava/lang/String;");

//获取String(byte[],String)的构造器,用于将本地byte[]数组转换为一个新String

jmethodID ctorID = (env)->GetMethodID(strClass, "<init>", "([BLjava/lang/String;)V");

//建立byte数组

jbyteArray bytes = (env)->NewByteArray(strlen(pat));

//将char* 转换为byte数组

(env)->SetByteArrayRegion(bytes, 0, strlen(pat), (jbyte*)pat);

// 设置String, 保存语言类型,用于byte数组转换至String时的参数

jstring encoding = (env)->NewStringUTF("GB2312");

//将byte数组转换为java String,并输出

return (jstring)(env)->NewObject(strClass, ctorID, bytes, encoding);

}

JNIEXPORT jobject JNICALL Java_HelloJNI_getGdbTable(JNIEnv *env, jobject obj,jobject _GeodbEntity){

const char * dd="4096";

//jclass userClass = env->FindClass("GeodbEntity");

jclass userClass=env->GetObjectClass(_GeodbEntity);

//jmethodID userMethod = env->GetMethodID(userClass,"<init>","()V");

//jobject userObject = env->NewObject(userClass,userMethod);

//jmethodID construction_id = env->GetMethodID(userClass, "<init>", "()V");

//得到构造方法的ID

//jobject userObject = env->NewObject(userClass, construction_id);

//jobject userObject = env->AllocObject(userClass);

//jmethodID setName_method=env->GetMethodID(userClass,"setSrid","(Ljava/lang/String;)V");

//env->CallVoidMethod(userObject,setName_method,dd);

//jclass objectClass = (env)->FindClass("GeodbEntity

jmethodID methodId=env->GetMethodID(userClass,"getTable","()Ljava/lang/String;");

//调用customer对象的特定方法getName

jstring js_name=(jstring)env->CallObjectMethod(_GeodbEntity,methodId,NULL);

//jfieldID table = (env)->GetFieldID(userClass,"table","Ljava/lang/String;");

//jchar dd=(env)->GetCharField(userClass,table);

//std::string value;

//const jchar* raw = env->GetStringChars(js_name, NULL);

//if (raw != NULL) {

//jsize len = env->GetStringLength(js_name);

//value.assign(raw, raw + len);

//env->ReleaseStringChars(js_name, raw);

//}

cout<<jstring2str(env,js_name)<<endl;

jfieldID str = (env)->GetFieldID(userClass,"srid","Ljava/lang/String;");

(env)->SetObjectField(_GeodbEntity,str,(env)->NewStringUTF(dd));

//获取arraylist 类

jclass cls_ArrayList = env->FindClass("java/util/ArrayList");

//获得arraylist id

jmethodID construct = env->GetMethodID(cls_ArrayList,"<init>","()V");

//创建arraylist

jobject obj_ArrayList = env->NewObject(cls_ArrayList,construct);

//获取 arraylist 的add 方法

jmethodID arrayList_add = env->GetMethodID(cls_ArrayList,"add","(Ljava/lang/Object;)Z");

for(int i=0;i<10;i++){

jobject alistadd = (env)->NewStringUTF("my name is D:"+i);

//通过 add 方法添加数据到 arraylist中

env->CallObjectMethod(obj_ArrayList,arrayList_add,alistadd);

}

jfieldID str1 = (env)->GetFieldID(userClass,"FieldValues","Ljava/util/ArrayList;");

(env)->SetObjectField(_GeodbEntity,str1,obj_ArrayList);

return _GeodbEntity;

}

posted on 2013-12-30 14:18 brock 阅读(215) 评论(0) 编辑收藏所属分类: cpp

新用户注册刷新评论列表


只有注册用户登录后才能发表评论。




网站导航: 博客园 IT新闻 Chat2DB C++博客博问管理
相关文章: 第一个C++类 geodatabase 转gml HelloJNI Windows环境下libxml2库的使用小结

Rising Sun

常用链接

留言簿(10)

随笔分类

随笔档案

相册

java--->ajax

搜索

最新评论

阅读排行榜

评论排行榜