[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; /~De2mq1
} bEm7QgV{X
int i1=l; *?/tO, R?
int i2=mid+1; BZK2$0
for(int cur=l;cur<=r;cur++){ .XXW|{
if(i1==mid+1) zuSq+pxL@
data[cur]=temp[i2++]; R}8XRe
else if(i2>r) Wf#VA;d
data[cur]=temp[i1++]; Ck\7F?S
else if(temp[i1] data[cur]=temp[i1++]; RK[D_SmS
else F^QQ0h]2
data[cur]=temp[i2++]; O] Y v
} {C3U6kKs;R
} ui:=
-$(Jk<
} j~;;l!({i
H&#{l)
改进后的归并排序: ^$v3eKA
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package org.rut.util.algorithm.support; j[I`\"
k.<3HU
import org.rut.util.algorithm.SortUtil; ?38lHn`FyQ
.`jo/,?+O
/** tF*szf|$-
* @author treeroot ';0 qj$#
* @since 2006-2-2 glj7$
* @version 1.0 O*[{z)M.
*/ xl(@C*.sC1
public class ImprovedMergeSort implements SortUtil.Sort { :_5/u|{
[}OgSP9i
private static final int THRESHOLD = 10; :_ROJ
%f j+70
/* hn.bau[
* (non-Javadoc) $Az^Y0[D
* t42ub
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 9T7e\<8"vC
*/ ]5}=^
public void sort(int[] data) { 8S]".
int[] temp=new int[data.length]; .f:n\eT):
mergeSort(data,temp,0,data.length-1); w]u@G-e
} OtJ\T/q,
nOb?-rR
private void mergeSort(int[] data, int[] temp, int l, int r) { ZE?f!ifp
int i, j, k; qH>`}/,P
int mid = (l + r) / 2; %dMqpY7"
if (l == r) L[g0&b%%-
return; =^&%9X
if ((mid - l) >= THRESHOLD) hA}~es=c
mergeSort(data, temp, l, mid); P?LlJ5hn
else %ft &Q
insertSort(data, l, mid - l + 1); eg/<[ A:
if ((r - mid) > THRESHOLD) MP^ d}FL
mergeSort(data, temp, mid + 1, r); AH#4wPxF
else :XG;ru%i
insertSort(data, mid + 1, r - mid); 3*ixlO:qGk
[kV;[c}
for (i = l; i <= mid; i++) { fpWg R4__
temp = data; oR .cSGh
} b| M3`
for (j = 1; j <= r - mid; j++) { J-xS:Ha'l
temp[r - j + 1] = data[j + mid]; cc}Key@D
} 5O<>mCF
int a = temp[l]; :i~W }r
int b = temp[r]; 2f>PO +4S{
for (i = l, j = r, k = l; k <= r; k++) { >&,[H:Z
if (a < b) { 59r_#(uo
data[k] = temp[i++]; K+Y^>N4m
a = temp; -d+aV1n
} else { `F t]MR
data[k] = temp[j--]; ~]HN9R^&
b = temp[j]; 5| B(\wqG
} 5|QzU|gPn
} R=Zn -q
} 7F^#o-@=J
fu[K".
/** 5cJ!"
* @param data WWKvh
* @param l Cx<0 H
* @param i l<g5yYyf
*/ 0 B@n{PvR0
private void insertSort(int[] data, int start, int len) { {q%Sx*k9[
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); {@W93=Vq8
} .Jx9bIw
} hRC
} 1Xu?(2;NF
} XV3C`:b
*N'K/36;
堆排序： *NFg;<:j
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package org.rut.util.algorithm.support; ,`D~py,
dU)]:>Uz
import org.rut.util.algorithm.SortUtil; a"N4~?US
Y;4!i?el
/** ldha|s.*
* @author treeroot Tm}rH]F&
* @since 2006-2-2 XfPFo6
* @version 1.0 7?j;7.i s(
*/ IU FH:w]
public class HeapSort implements SortUtil.Sort{ M<O{O}t<
Vd^g9
/* (non-Javadoc) E 99hlY~1:
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) $YxBE`)d-
*/ (*}yjUYLZ
public void sort(int[] data) { S$)*&46g
MaxHeap h=new MaxHeap(); >Y7a4~ufko
h.init(data); 2H71~~ c
for(int i=0;i h.remove(); }KUd7[s
System.arraycopy(h.queue,1,data,0,data.length); GSclK|#tE
} q6Rr.A
,.iRnR
private static class MaxHeap{ W1fW}0
~5Pb&+<$
void init(int[] data){ 6E(Qx~iL
this.queue=new int[data.length+1]; Y8M]Lwj
for(int i=0;i queue[++size]=data; }En
fixUp(size); !+>v[(OzM
} qm/Q65>E
} :NJ_n6E
pl@O N"=[
private int size=0; ,B?~-2cCz
OsBo+fwT
private int[] queue; <,o>Wx*1C
W} WI; cI
public int get() { Lbe\@S
return queue[1]; .2d9?p3Y
} We0.3aG
T134ZXqqz
public void remove() { V7#v6!7A@
SortUtil.swap(queue,1,size--); 4BnSqwa_
fixDown(1); `E+Jnu,jC
} QaUm1i#
file://fixdown ? WJ> p
private void fixDown(int k) { ^`un'5Vk
int j; w=b)({`M
while ((j = k << 1) <= size) { XE^)VLH:
if (j < size %26amp;%26amp; queue[j] j++; _zlqtO
if (queue[k]>queue[j]) file://不用交换 3bO(?l`3h
break; BA\/YW @
SortUtil.swap(queue,j,k); u]}s)SmDk
k = j; l/;X?g5+
} B8E'ddUw
} 4iSa7YqhBT
private void fixUp(int k) { n]8<DX99Q0
while (k > 1) { %X#zj"
int j = k >> 1; ~l;[@jsw F
if (queue[j]>queue[k]) f{SB1M
break; )`^p%k
SortUtil.swap(queue,j,k); 6'\6OsH
k = j; dJ"iEb|4
} s4&^D<
} zD?oXs
LYlDc;<A
} Gy=B&boZ
G)?9.t_Lj-
} gV&z2S~"
+`?Y?L^ J
SortUtil： Y*mbjyt[?X
pr%nbl
package org.rut.util.algorithm; \u6^Varw
/}-CvSR
import org.rut.util.algorithm.support.BubbleSort; 7 |DHplI
import org.rut.util.algorithm.support.HeapSort; gZ5[ C
import org.rut.util.algorithm.support.ImprovedMergeSort; >0Q|nCx
import org.rut.util.algorithm.support.ImprovedQuickSort; ~]ZpA-*@Ut
import org.rut.util.algorithm.support.InsertSort; N !TW!
import org.rut.util.algorithm.support.MergeSort; MZmb`%BZ
import org.rut.util.algorithm.support.QuickSort; d)~Fmi;
import org.rut.util.algorithm.support.SelectionSort; qI^ /"k*5
import org.rut.util.algorithm.support.ShellSort; n3J53| %v
C6rg<tCH
/** NcY608C
* @author treeroot }9nDo*A"}
* @since 2006-2-2 9"g6C<
* @version 1.0 R8.CC1Ix
*/ K~ ;45Z2
public class SortUtil { 1S@vGq}
public final static int INSERT = 1; JxyB(
public final static int BUBBLE = 2; q^6+!&"
public final static int SELECTION = 3; A*W)bZs.
public final static int SHELL = 4; 6e7{Iy
public final static int QUICK = 5; )7_"wD` z
public final static int IMPROVED_QUICK = 6; GR\5WypoJ
public final static int MERGE = 7; fS^!ZPe1
public final static int IMPROVED_MERGE = 8; zt^48~ry
public final static int HEAP = 9; ~|<m,)!
.*elggM
public static void sort(int[] data) { 2h?uNW(0Q
sort(data, IMPROVED_QUICK); mrX^2SR
} EbqcV\Kb
private static String[] name={ ayAo^q
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" >}(CEzc8
}; J,b&XD@m
xW92ch+t
private static Sort[] impl=new Sort[]{ Wb S4pdA
new InsertSort(), >[X{LI(_<<
new BubbleSort(), 6~*9;!th
new SelectionSort(), 4DTzSy:x
new ShellSort(), O]qU[y+
new QuickSort(), ek&kv#G
new ImprovedQuickSort(), [Y`,qB<B
new MergeSort(), 9{:O{nl
new ImprovedMergeSort(), eI@ q|"U
new HeapSort() ,^S@EDq
}; *b];|n{
iOG[>u0h
public static String toString(int algorithm){ ?&Pg2]g<
return name[algorithm-1]; *cyeO*
} a ^%"7Ri
@)K%2Y`
public static void sort(int[] data, int algorithm) { u[{tb
impl[algorithm-1].sort(data); LdB($4,
} 3"rzb]=R
1h.)#g?{
public static interface Sort { }.z&P'
public void sort(int[] data); [~&XL0
} [d* ~@P
cHa]xmy%r'
public static void swap(int[] data, int i, int j) { t=xOQ8
int temp = data; ntmyNf?;
data = data[j]; f3UXCp
data[j] = temp; *3D%<kVl
} 0q&'(-{s1
} $y b4xU