[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; oSy[/Y44a
} +-8uIqZ
int i1=l; 5F <zW-;
int i2=mid+1; ;t*45
for(int cur=l;cur<=r;cur++){ xj%h-@o6
if(i1==mid+1) b.ow0WYe
data[cur]=temp[i2++]; ,)oUdwR k
else if(i2>r) <=jE,6_|
data[cur]=temp[i1++]; fkk\Q>J9!=
else if(temp[i1] data[cur]=temp[i1++]; $!KV]]
else T4\,b
data[cur]=temp[i2++]; trgj]|?M
} DSET!F;PG
} Kw-E%7gh4c
^5"s3Qn
} W@pVP4F0xM
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改进后的归并排序: ,v)@&1Wh:
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package org.rut.util.algorithm.support; KY4|C05,
m=j7 vb
import org.rut.util.algorithm.SortUtil; +s_@964
^*}L9Ot~
/** Xg.\B1d
* @author treeroot H#wn3O
* @since 2006-2-2 E!3W_:Bs
* @version 1.0 3haY{CEr
*/ (x?A#o>%
public class ImprovedMergeSort implements SortUtil.Sort { _=4Dh/Dv
9e8@0?0
private static final int THRESHOLD = 10; xNq&_oY7
&\c$s
/* t{84ioJ"$
* (non-Javadoc) )t@OHSl
* Cw Z{&
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) BflF*-s ^
*/ DB%=/ \U
public void sort(int[] data) { S>cT(q_&
int[] temp=new int[data.length]; T<p>:$vo
mergeSort(data,temp,0,data.length-1); ^HC! my
} i3#]_ p{
}54\NSj0
private void mergeSort(int[] data, int[] temp, int l, int r) { ab3" ?.3m
int i, j, k; C"hc.A&4
int mid = (l + r) / 2; a>""MC2
if (l == r) M# S:'WN
return; SU H^]4>
if ((mid - l) >= THRESHOLD) .}a@OLJd
mergeSort(data, temp, l, mid); 1v,4[;{
else 63F0Za}h
insertSort(data, l, mid - l + 1); #4~Ivj
if ((r - mid) > THRESHOLD) M|Z]B<_x
mergeSort(data, temp, mid + 1, r); Ur5X~a\y
else Dr`A4LnqY
insertSort(data, mid + 1, r - mid); 0=-h9W{zI
64>Zr
for (i = l; i <= mid; i++) { U .e Urzu
temp = data; PJkEBdM.
} ?i9LqHL
for (j = 1; j <= r - mid; j++) { ~#) DJ
temp[r - j + 1] = data[j + mid]; *:GoS?Ma
} MPM_/dn-
int a = temp[l]; {^$rmwN
int b = temp[r]; P#76ehR]K
for (i = l, j = r, k = l; k <= r; k++) { GT#iY*
if (a < b) { =BNmuAY7
data[k] = temp[i++]; ?4gYUEM#
a = temp; K<\TF+
} else { Hyc19|
data[k] = temp[j--]; -C.eXR{s
b = temp[j]; gIRFqEz@o
} 9>[$;>
} qj=12;
} oh,Nu_!
!k%Vw18
/** O+z-6:`
* @param data %Z.>)R4
* @param l udW, P
* @param i =p^*y-z
*/ 2nOQ48haT
private void insertSort(int[] data, int start, int len) { RwY) O5
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); &eg]8kV
} =}_c=z?UY
} j3A+:KDn3n
} *|hICTWL
} \XmtSfFC
d4A}BTs1
堆排序： 6t*=.b,N
8fZ\})t
package org.rut.util.algorithm.support; qdO^)uJJ
C.(<KV{b
import org.rut.util.algorithm.SortUtil; 1 5rE|m^
Z`< +8e
/** _mFb+8C
* @author treeroot F~<$E*&h@
* @since 2006-2-2 e|]g?!
* @version 1.0 _khQ
*/ 7|"11^q
public class HeapSort implements SortUtil.Sort{ -XD\,y%zi
D`,@EW].
/* (non-Javadoc) C^l)n!fq
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) evtn/.kDR
*/ O`rrg~6#
public void sort(int[] data) { \/{qE hP
MaxHeap h=new MaxHeap(); S.M< (
h.init(data); #N,\c@Gy
for(int i=0;i h.remove(); (Z6[a{}1i
System.arraycopy(h.queue,1,data,0,data.length); x$6-7<p
} X9zTz2 Fy
Yo(8mtYU
private static class MaxHeap{ CbK7="48
/WMG)#kw'
void init(int[] data){ y\)bxmC
this.queue=new int[data.length+1]; 9lOUE
for(int i=0;i queue[++size]=data; 'Y>!xm
fixUp(size); u4fTC})4{C
} j+Wgjf
} (?q]E$ @
5C{X$7u
private int size=0; 0.&gm@A~c$
yvNYYp2r
private int[] queue; RwT.B+Onuy
d|DIqT~{W
public int get() { ZYu^Q6b3
return queue[1]; r|rV1<d
} cCWOGd
-hhE`Y
public void remove() { /sJk[5!z
SortUtil.swap(queue,1,size--); Cg)#B+
fixDown(1); qF( ]Ce
} vad" N
file://fixdown <}B|4($
private void fixDown(int k) { 5F&i/8Ib
int j; ]P]lG-
while ((j = k << 1) <= size) { 0-FwHDxw
if (j < size %26amp;%26amp; queue[j] j++; xAz gQ
if (queue[k]>queue[j]) file://不用交换 h :NHReMT
break; A+Z3b:}~
SortUtil.swap(queue,j,k); $W` &7
k = j; :GGsQ n
} D {>,2hC
} 0Wv9K~F
private void fixUp(int k) { Tz%l9aC
while (k > 1) { ,3N8
int j = k >> 1; j>0S3P,
if (queue[j]>queue[k]) /A##Yv!biR
break; 8>O'_6Joj
SortUtil.swap(queue,j,k); TvM{ QGN
k = j; VwtGHF'
} ^JYR^X>_
} t}NxD`8
r]8tl
} |(y6O5Y.
tk_y~-xz
} o&I0*~sN
9HP)@66
SortUtil： Oi l>bv8
l 4~'CLi
package org.rut.util.algorithm; MY1 tYO
Hk3HzN3
import org.rut.util.algorithm.support.BubbleSort; 9chiu%20
import org.rut.util.algorithm.support.HeapSort; AS4m227
import org.rut.util.algorithm.support.ImprovedMergeSort; a$;+-Y
import org.rut.util.algorithm.support.ImprovedQuickSort; :gQc@)jZ(*
import org.rut.util.algorithm.support.InsertSort; kl2]#G(
import org.rut.util.algorithm.support.MergeSort; x40R)Led
import org.rut.util.algorithm.support.QuickSort; Mzxz-cE
import org.rut.util.algorithm.support.SelectionSort; MZ0uc2L=
import org.rut.util.algorithm.support.ShellSort; iAup',AZg
[iL2c=_
/** jY ^ndr0;
* @author treeroot ]1D>3
* @since 2006-2-2 b/ZX}<s(1=
* @version 1.0 Xb6@;G"
*/ vs6`oW"{#
public class SortUtil { /Rt/Efu
public final static int INSERT = 1; YMqL,&Q{1
public final static int BUBBLE = 2; rr9HC]63
public final static int SELECTION = 3; G)b]uX
public final static int SHELL = 4; 8|yhe%-O
public final static int QUICK = 5; n=hz7tjaz
public final static int IMPROVED_QUICK = 6; W,wg@2
public final static int MERGE = 7; |#!25qAT
public final static int IMPROVED_MERGE = 8; G-,PsXSwe
public final static int HEAP = 9; :5@7z9 >
p'xj:bB
public static void sort(int[] data) { VFG)|Z
sort(data, IMPROVED_QUICK); .@=d I
} :i:Zc~%
private static String[] name={ uY'Ib[H
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" RZ?>>Ll6
}; ?8vjHEE
_>3GNvS
private static Sort[] impl=new Sort[]{ G?jY>;P)
new InsertSort(), FVF:1DT
new BubbleSort(), 2hU4g e?6
new SelectionSort(), frGUT#9?n
new ShellSort(), (S9"(\A
new QuickSort(), XV+BSW7}
new ImprovedQuickSort(), i<=@7W
new MergeSort(), @h^5*M
new ImprovedMergeSort(), gdkO|x
new HeapSort() <_42h|-
}; W>1\f0'
rEddX
public static String toString(int algorithm){ S93NsrBbY
return name[algorithm-1]; C"0gAN
} bS0^AVA
QouTMS-b
public static void sort(int[] data, int algorithm) { guFR5>-L
impl[algorithm-1].sort(data); =YPWt>\a}
} LM*9b
CR, Y%0vQ
public static interface Sort { a?+) K
public void sort(int[] data); RsrZ1dhPvV
} ?%;uR#4
Xwx;m/
public static void swap(int[] data, int i, int j) { hi.{
int temp = data; ;B1}so1]
data = data[j]; C,fIwqOr3
data[j] = temp; M_*w)<
} e@F&/c
} yChC&kX Z+