JNI处理各种类型数据，不包含获取Java的HashMap

package com.xupan.jni; import java.util.ArrayList; import java.util.HashMap; import java.util.Iterator; import java.util.Map; import java.util.Vector; import java.util.Set; public class HelloJNI { static { System.loadLibrary("Hello"); } private String m_string; private int m_int; private long m_long; public HelloJNI() { m_string ="xupan"; m_int = 100; m_long = 1000; } private void getMessage() { System.out.println(m_string); System.out.println(m_int); System.out.println(m_long); } public native void DisplayHello(); public native int intMethod(int num); public native boolean booleanMethod(boolean b); public native String stringMethod(String text); public native int intArrayMethod(int[] intArray); public native int[] replyIntArrayMethod(); public native String[] replyStringArray(String text); public native MailInfo[] objectMethod(String text); public native void accessJavaMethod(); public native ArrayList<String> arrayListMethod(ArrayList<String> ids); public native HashMap<String,HashMap<String,String> > mapMethod(HashMap<String,String> mymap); public static void main(String[] args) throws java.io.UnsupportedEncodingException{ HelloJNI sample = new HelloJNI(); sample.DisplayHello(); int square = sample.intMethod(10); boolean bool = sample.booleanMethod(true); String text = sample.stringMethod("Jave"); int sum = sample.intArrayMethod(new int[]{1,1,2,3,4,5,6}); System.out.println("intMethod:"+square); System.out.println("booleanMethod:"+bool); System.out.println("stringMethod:"+text); System.out.println("intArrayMethod:"+sum); int[] nums = sample.replyIntArrayMethod(); for(int i=0;i<nums.length;i++) System.out.println(nums[i]); String[] texts = sample.replyStringArray("java aaaa"); for(int i=0;i<texts.length;i++) { texts[i]=new String(texts[i].getBytes("ISO8859-1"),"GBK"); System.out.print( texts[i] ); } System.out.println(); MailInfo[] mails = sample.objectMethod("Thinking In Java"); for(int i=0;i<mails.length;i++) System.out.println(mails[i].topic); sample.accessJavaMethod(); ArrayList<String> arr_input = new ArrayList<String>(); arr_input.add("Table1"); arr_input.add("Table2"); arr_input.add("Table3"); try { ArrayList<String> ret = sample.arrayListMethod(arr_input); for(int i=0;i<ret.size();i++) { System.out.println(ret.get(i)); } } catch(Exception e) { System.out.println(e.getMessage()); } HashMap<String,String> map_input = new HashMap<String,String>(); map_input.put("ID", "10"); map_input.put("NAME", "XUPAN"); Iterator<Map.Entry<String, String>> iter = map_input.entrySet().iterator(); while (iter.hasNext()) { Map.Entry<String,String> entry = iter.next(); Object k = entry.getKey(); Object v = entry.getValue(); System.out.println((String)k + ":"+(String)v); } Set<String> ss = map_input.keySet(); for(int i=0;i<ss.size();i++) { //System.out.println(ss.); } HashMap<String, HashMap<String,String> > ret = sample.mapMethod(map_input); for(Object id : ret.keySet()) { String s_id = (String)id; HashMap<String,String> row_map = (HashMap<String,String>)ret.get(id); for(Object name: row_map.keySet()) { String k = (String)name; String v = (String)row_map.get(name); System.out.println(s_id + " " + k+" "+v); } } } }