[JAVA]用Java实现的各种排序

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0 发表于: 2007-03-15

用Java语言实现的各种排序，包括插入排序、冒泡排序、选择排序、Shell排序、快速排序、归并排序、堆排序、SortUtil等。
插入排序：

package org.rut.util.algorithm.support;

import org.rut.util.algorithm.SortUtil;
/**
* @author treeroot
* @since 2006-2-2
* @version 1.0
*/
public class InsertSort implements SortUtil.Sort{

/* (non-Javadoc)
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[])
*/
public void sort(int[] data) {
int temp;
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1);
}
}
}

}

冒泡排序：

package org.rut.util.algorithm.support;

import org.rut.util.algorithm.SortUtil;

/**
* @author treeroot
* @since 2006-2-2
* @version 1.0
*/
public class BubbleSort implements SortUtil.Sort{

/* (non-Javadoc)
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[])
*/
public void sort(int[] data) {
int temp;
for(int i=0;i for(int j=data.length-1;j>i;j--){
if(data[j] SortUtil.swap(data,j,j-1);
}
}
}
}

}

选择排序：

package org.rut.util.algorithm.support;

import org.rut.util.algorithm.SortUtil;

/**
* @author treeroot
* @since 2006-2-2
* @version 1.0
*/
public class SelectionSort implements SortUtil.Sort {

/*
* (non-Javadoc)
*
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[])
*/
public void sort(int[] data) {
int temp;
for (int i = 0; i < data.length; i++) {
int lowIndex = i;
for (int j = data.length - 1; j > i; j--) {
if (data[j] < data[lowIndex]) {
lowIndex = j;
}
}
SortUtil.swap(data,i,lowIndex);
}
}

}

Shell排序：

package org.rut.util.algorithm.support;

import org.rut.util.algorithm.SortUtil;

/**
* @author treeroot
* @since 2006-2-2
* @version 1.0
*/
public class ShellSort implements SortUtil.Sort{

/* (non-Javadoc)
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[])
*/
public void sort(int[] data) {
for(int i=data.length/2;i>2;i/=2){
for(int j=0;j insertSort(data,j,i);
}
}
insertSort(data,0,1);
}

/**
* @param data
* @param j
* @param i
*/
private void insertSort(int[] data, int start, int inc) {
int temp;
for(int i=start+inc;i for(int j=i;(j>=inc)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-inc);
}
}
}

}

快速排序：

package org.rut.util.algorithm.support;

import org.rut.util.algorithm.SortUtil;

/**
* @author treeroot
* @since 2006-2-2
* @version 1.0
*/
public class QuickSort implements SortUtil.Sort{

/* (non-Javadoc)
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[])
*/
public void sort(int[] data) {
quickSort(data,0,data.length-1);
}
private void quickSort(int[] data,int i,int j){
int pivotIndex=(i+j)/2;
file://swap
SortUtil.swap(data,pivotIndex,j);

int k=partition(data,i-1,j,data[j]);
SortUtil.swap(data,k,j);
if((k-i)>1) quickSort(data,i,k-1);
if((j-k)>1) quickSort(data,k+1,j);

}
/**
* @param data
* @param i
* @param j
* @return
*/
private int partition(int[] data, int l, int r,int pivot) {
do{
while(data[++l] while((r!=0)%26amp;%26amp;data[--r]>pivot);
SortUtil.swap(data,l,r);
}
while(l SortUtil.swap(data,l,r);
return l;
}

}

改进后的快速排序：

package org.rut.util.algorithm.support;

import org.rut.util.algorithm.SortUtil;

/**
* @author treeroot
* @since 2006-2-2
* @version 1.0
*/
public class ImprovedQuickSort implements SortUtil.Sort {

private static int MAX_STACK_SIZE=4096;
private static int THRESHOLD=10;
/* (non-Javadoc)
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[])
*/
public void sort(int[] data) {
int[] stack=new int[MAX_STACK_SIZE];

int top=-1;
int pivot;
int pivotIndex,l,r;

stack[++top]=0;
stack[++top]=data.length-1;

while(top>0){
int j=stack[top--];
int i=stack[top--];

pivotIndex=(i+j)/2;
pivot=data[pivotIndex];

SortUtil.swap(data,pivotIndex,j);

file://partition
l=i-1;
r=j;
do{
while(data[++l] while((r!=0)%26amp;%26amp;(data[--r]>pivot));
SortUtil.swap(data,l,r);
}
while(l SortUtil.swap(data,l,r);
SortUtil.swap(data,l,j);

if((l-i)>THRESHOLD){
stack[++top]=i;
stack[++top]=l-1;
}
if((j-l)>THRESHOLD){
stack[++top]=l+1;
stack[++top]=j;
}

}
file://new InsertSort().sort(data);
insertSort(data);
}
/**
* @param data
*/
private void insertSort(int[] data) {
int temp;
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1);
}
}
}

}

归并排序：

package org.rut.util.algorithm.support;

import org.rut.util.algorithm.SortUtil;

/**
* @author treeroot
* @since 2006-2-2
* @version 1.0
*/
public class MergeSort implements SortUtil.Sort{

/* (non-Javadoc)
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[])
*/
public void sort(int[] data) {
int[] temp=new int[data.length];
mergeSort(data,temp,0,data.length-1);
}

private void mergeSort(int[] data,int[] temp,int l,int r){
int mid=(l+r)/2;
if(l==r) return ;
mergeSort(data,temp,l,mid);
mergeSort(data,temp,mid+1,r);
for(int i=l;i<=r;i++){
temp=data; >j- b5g"g
} RW)k_#%=
int i1=l; &*jixqzvn
int i2=mid+1; HwM/}-t
for(int cur=l;cur<=r;cur++){ c[Yq5Bu{y
if(i1==mid+1) ]a=l^Pc(xN
data[cur]=temp[i2++]; 9!cW
else if(i2>r) .jCk#@+
data[cur]=temp[i1++]; f@L\E>t
else if(temp[i1] data[cur]=temp[i1++]; `u$24h'!
else CM"s9E8y
data[cur]=temp[i2++]; f)WPOTEY
} kHZKj!!R
} so'eZ"A:
TZkTz P[
} pIL`WE1'
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改进后的归并排序: hl}dgp((
[-QK$~[ g
package org.rut.util.algorithm.support; h%u?lW
Sw[=S '(l
import org.rut.util.algorithm.SortUtil; WVj&0
J09ZK8 hK
/** ,I=O"z>9
* @author treeroot 6B /Jp
* @since 2006-2-2 Z"+(LO!
* @version 1.0 8XgVY9]Qm
*/ eMztjN
public class ImprovedMergeSort implements SortUtil.Sort { =g1D;
1/!nV
private static final int THRESHOLD = 10; ddl3fl#f
W%w82@'
/* aL{EkiR
* (non-Javadoc) S`fu+^cv
* \A~4\um
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) dnk1Mu<
*/ uLF\K+cz
public void sort(int[] data) { dr}O+7_7%-
int[] temp=new int[data.length]; ud5x$`
mergeSort(data,temp,0,data.length-1); m79m{!q$-
} S|tA[klh
+ESX.Vel
private void mergeSort(int[] data, int[] temp, int l, int r) { e$gaE</
int i, j, k; UqY J#&MqY
int mid = (l + r) / 2; nsy!p5o
if (l == r) MI?]8+l
return; qEPf-O:lm
if ((mid - l) >= THRESHOLD) A5`#Ot*3
mergeSort(data, temp, l, mid); l[:^TfB
else k:@a[qnY
insertSort(data, l, mid - l + 1); 1i ?gvzrq
if ((r - mid) > THRESHOLD) j@s=ER
mergeSort(data, temp, mid + 1, r); &IxxDvP3k
else G;87in ,}
insertSort(data, mid + 1, r - mid); ~y( ,EO
@fUX)zm>
for (i = l; i <= mid; i++) { Ey 0>L
temp = data; hn*}5!^
} XT\Td}>
for (j = 1; j <= r - mid; j++) { 'cWlY3%t
temp[r - j + 1] = data[j + mid]; eYPt
} m/SJ4op$
int a = temp[l]; ,%& LG],6
int b = temp[r]; Aigcq38
for (i = l, j = r, k = l; k <= r; k++) { yN%3w0v
if (a < b) { }mkA Hmu4
data[k] = temp[i++]; q=(M!9cE
a = temp; t"jIfU>'a/
} else { EY=\C$3J:
data[k] = temp[j--]; bL6L-S
b = temp[j]; ufHuI*
} 6yV5Yjs
} =P@M&Yy'
} ;))[P_$zB
:T8u?@.
/** hlYS=cgY=
* @param data WMt&8W5
* @param l ~7FEY0/
* @param i P*?d6v,r
*/ /TR"\xQF
private void insertSort(int[] data, int start, int len) { qJe&jLZa
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); i'[n`|c<
} HPv&vdr3
} %`t]FV^#
} 9u-M! $
} i!/h3%=
I_R5\l}O+D
堆排序： 7=9A_4G!
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package org.rut.util.algorithm.support; eWqVh[
BVwRPt
import org.rut.util.algorithm.SortUtil; d|D'&&&c
-;W\f<q]
/** a,F8+ Pb>
* @author treeroot sYW1T @
* @since 2006-2-2 +?J_6Mo@X
* @version 1.0 js%4;
*/ $Sc08ro
public class HeapSort implements SortUtil.Sort{ QBN=l\m+
0e7O#-
/* (non-Javadoc) h;:Se
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ~7)rKHau
*/ mYsuNTx!.
public void sort(int[] data) { {!:|.!-u
MaxHeap h=new MaxHeap(); P %U9S
h.init(data); z[$9B#P
for(int i=0;i h.remove(); 4q@9
System.arraycopy(h.queue,1,data,0,data.length); ZIGbwL
} ^HOwN<}`#
ZipK;!9by
private static class MaxHeap{ VLwJ6?.f'
ePu2t3E
void init(int[] data){ Y;%R/OyWY
this.queue=new int[data.length+1]; ajcPt]f
for(int i=0;i queue[++size]=data; t6H2tP\AS
fixUp(size); pE YrmC
} lL(}dbT~N
} lhW#IiX
R+@sHsZ@
private int size=0; qU /Wg
s\3Z?zm8
private int[] queue; %yS`C"ZQ)
[h2p8i'o
public int get() { " N`V*0h
return queue[1]; %3@RZe
} >k&lGF<nl
eW }jS/g`
public void remove() { JXI+k.fi
SortUtil.swap(queue,1,size--); ~$TE
fixDown(1); iX9[Q0g=oQ
} "cz]bCr8
file://fixdown ^0BF2&Zx
private void fixDown(int k) { jT wM<?
int j; 9b=^"K
while ((j = k << 1) <= size) { 2kmna/Qa6
if (j < size %26amp;%26amp; queue[j] j++; sL[(cX?;2
if (queue[k]>queue[j]) file://不用交换 j_YZ(: =
break; 5D02%U2N)G
SortUtil.swap(queue,j,k); EcS-tE4%
k = j; bW 79<T'+
} ko7-%+0|]
} ,:Rq
private void fixUp(int k) { 6lH>600]u
while (k > 1) { @Tm0T7C
int j = k >> 1; 0I ND9h.%
if (queue[j]>queue[k]) Z:o' +oh
break; v'2OHb#
SortUtil.swap(queue,j,k); \VhpB
k = j; ah&plaVzC
} "351s3ff
} #VMBn}
N%M>,wT
} EF7|%N
fAA@ziKg
} ss M9t
d9e H}#OY
SortUtil： JwG5#CFu^
:O@,Z_"
package org.rut.util.algorithm; X:} 5L>'
SJ|.% gn
import org.rut.util.algorithm.support.BubbleSort; 5IF~]5s
import org.rut.util.algorithm.support.HeapSort; BX)cV
import org.rut.util.algorithm.support.ImprovedMergeSort; W~@GK
import org.rut.util.algorithm.support.ImprovedQuickSort; %_X[{(
import org.rut.util.algorithm.support.InsertSort; =w>>7u$4
import org.rut.util.algorithm.support.MergeSort; 4@V<Suw
import org.rut.util.algorithm.support.QuickSort; B#V4
import org.rut.util.algorithm.support.SelectionSort; m#}{"d&J
import org.rut.util.algorithm.support.ShellSort; GT`<jzAiQ
+ 1%^c(3
/** =jd=Qs IL
* @author treeroot pa> 2JF*
* @since 2006-2-2 1_E3DXe
* @version 1.0 ^{]sD}Q"
*/ HuLm!tCu
public class SortUtil { `5 v51TpH
public final static int INSERT = 1; 9QM"JEu@
public final static int BUBBLE = 2; :Tl6:=B
public final static int SELECTION = 3; C?<XtIoB
public final static int SHELL = 4; }JTgj
public final static int QUICK = 5; .^+$w$
public final static int IMPROVED_QUICK = 6; r3bvuq,6$
public final static int MERGE = 7; A,CPR0g%
public final static int IMPROVED_MERGE = 8; EpS8,[w
public final static int HEAP = 9; gZ%O<XO
x jUH<LFxy
public static void sort(int[] data) { o4 OEA)k)=
sort(data, IMPROVED_QUICK); Chi<)P$^
} 1Qe!
private static String[] name={ u2x=YUWb]
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" !{ )AV/\D
}; k^%ec3l
,8 NEnB
private static Sort[] impl=new Sort[]{ W2LblZE!
new InsertSort(), kx#L<
new BubbleSort(), OU3+SYM
new SelectionSort(), {zN_l!
new ShellSort(), 5$G??="K
new QuickSort(), qA\kx#v]P
new ImprovedQuickSort(), q>oH(A
new MergeSort(), />I8nS}T
new ImprovedMergeSort(), tS\NO@E_Jh
new HeapSort() G78j$ ^/0
}; &-)Y[#\J
r0uXMr=Z96
public static String toString(int algorithm){ wdDHRW0Y
return name[algorithm-1]; JY8"TQ$x
} %[CM;|?B4
{EHG |
public static void sort(int[] data, int algorithm) { HaN_}UMP
impl[algorithm-1].sort(data); 4g^+y.,r_f
} rxk{Li<9
\osQwGPV
public static interface Sort { :Ty*i
public void sort(int[] data); +&8Ud8Q
} Q>c6ouuJ
Y_YIJ@
public static void swap(int[] data, int i, int j) { <%JO3E
int temp = data; cQ ;Ry!$
data = data[j]; 8t \>
data[j] = temp; A|OC?NZY
} [jn;| 3
} BiCa "