[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 .:t
} 1$.svR
int i1=l; ;+(_stxqV9
int i2=mid+1; /n(0w`
for(int cur=l;cur<=r;cur++){ 64#Ri!RR}
if(i1==mid+1) #:N#i
data[cur]=temp[i2++]; [;7zg@Sa
else if(i2>r) C|Y[T{g?t
data[cur]=temp[i1++]; nA_'jl
else if(temp[i1] data[cur]=temp[i1++]; ZklpnL*!
else ^'`(E_2u
data[cur]=temp[i2++]; i!8"T#
} kvbW^pl
} T[xIn+w
@VW1^{.do^
} 52j3[in
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改进后的归并排序: LQr!0p.i"
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package org.rut.util.algorithm.support; jSHFY]2
6;:D!},'c
import org.rut.util.algorithm.SortUtil; .%7Le|Fb"
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/** {DKZ~
* @author treeroot )-1e}VF(U
* @since 2006-2-2 \-]tvgA~&
* @version 1.0 n.a2%,|v
*/ H"^9g3U
public class ImprovedMergeSort implements SortUtil.Sort { 6,jCO@!
(B$>o.(JA
private static final int THRESHOLD = 10; $z*"@
axt;}8
/* ]S]W|m7=.Z
* (non-Javadoc) 8rS;}Bt
* e(a,nZF.
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) hKN ;tq,
*/ C P&u
public void sort(int[] data) { lEwQj[ k
int[] temp=new int[data.length]; _V1:'T8
mergeSort(data,temp,0,data.length-1); GRYw_}Aa
} w{dRf!b69
=^rp= Az
private void mergeSort(int[] data, int[] temp, int l, int r) { cf$ hIB)Oi
int i, j, k; /3rNX}tOMH
int mid = (l + r) / 2; 2jC:uk
if (l == r) ogQfzk
return; Z}0xK6
if ((mid - l) >= THRESHOLD) gsEcvkj*
mergeSort(data, temp, l, mid); &dWGa+e
else @$^4Av-
insertSort(data, l, mid - l + 1); $.$nv~f
if ((r - mid) > THRESHOLD) 5EVypw?]x
mergeSort(data, temp, mid + 1, r); :ChXzZ
else `Rfe*oAf
insertSort(data, mid + 1, r - mid); 5NN;Fw+
(!5Pl`:j"
for (i = l; i <= mid; i++) { 1;c>#20
temp = data; C{^I}p
} R!"|~OO
for (j = 1; j <= r - mid; j++) { ,9jk<)m]L
temp[r - j + 1] = data[j + mid]; "u4x#7n|
} QgYt(/S
int a = temp[l]; hGrX,.zj
int b = temp[r]; WxO+cB+?
for (i = l, j = r, k = l; k <= r; k++) { X>uLGr>
if (a < b) { |O>e=HC#q8
data[k] = temp[i++]; d7r!<u&/
a = temp; +FadOx7X$
} else { yv]|Ce@8A
data[k] = temp[j--]; )h 6w@TF
b = temp[j]; ?.F^Oi6 u
} uQn1kI[y
} DjN1EP\Xx
} M\k[?i
u&S0
/** G;vj3#u?
* @param data |4pl}:g/Z
* @param l ?qSwV.l]d
* @param i tCO?<QBE
*/ 1Dhe! n#
private void insertSort(int[] data, int start, int len) { r0[<[jEh
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); c;"e&tW
} KFO K%vbM
} <Fx%P:d
} $MQ<QP
} /{[<J<(8
{.e+?V2>_
堆排序： '/\*l<
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package org.rut.util.algorithm.support; 2 yANf
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import org.rut.util.algorithm.SortUtil; 3V^5 4_
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/** @XtrC|dkkE
* @author treeroot _{#K
* @since 2006-2-2 M6Xzyt|
* @version 1.0 6QT&{|q=
*/ }ff^^7_
public class HeapSort implements SortUtil.Sort{ H{N},B
cH5
/* (non-Javadoc) sm{0o$\Z
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) A_E2v{*n
*/ t}Td$K7
public void sort(int[] data) { z?Z"*z
MaxHeap h=new MaxHeap(); d(^HO~p
h.init(data); 6A.%)whI;
for(int i=0;i h.remove(); %vZHHBylu
System.arraycopy(h.queue,1,data,0,data.length); -?1R l:rM
} Bnk<e
S!$S'{f<
private static class MaxHeap{ y5aPs z
pT~3< ,
void init(int[] data){ H}G 9gi
this.queue=new int[data.length+1]; "HqmS
for(int i=0;i queue[++size]=data; Q=DMfJ"
fixUp(size); Vi^vG`L9
} -u"|{5? '
} w{L9-o3A
03zt^<
private int size=0; D~i5E9s5
!Z\Gv1
private int[] queue; 3`{ vx
rloxM~7!,)
public int get() { }s'=w]m
return queue[1]; jz=V*p}6
} y*sVimx
pnp8`\cIH
public void remove() { p&<n_b
SortUtil.swap(queue,1,size--); CC3i@
fixDown(1); WW6-oQs_#*
} q&9]4j
file://fixdown k%Tp9x$
private void fixDown(int k) { 2TB'HNTFx
int j; |"%OI~^%
while ((j = k << 1) <= size) { >iK LC
if (j < size %26amp;%26amp; queue[j] j++; 7_jt =sr
if (queue[k]>queue[j]) file://不用交换 mM?,e7Xhs
break; 3 i>NKS
SortUtil.swap(queue,j,k); eE .wnn
k = j; <=6F=u3PtU
} 1oiSmW\
} M,ybj5:6
private void fixUp(int k) { hPG@iX|V
while (k > 1) { )l m7ly8a|
int j = k >> 1; L..
if (queue[j]>queue[k]) ~J~R.r/
break; ?F$#t6Q
SortUtil.swap(queue,j,k); G;wh).jG5
k = j; NCzabl
} @@\px66
} HRbv%
<<gW`KF
} [hot,\+f
<wFmfrx+v
} OIw[sum2
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SortUtil： qHyOaKMd
Z{l`X#':
package org.rut.util.algorithm; `#!>}/m
4:O.x#p
import org.rut.util.algorithm.support.BubbleSort; 1GkoE
import org.rut.util.algorithm.support.HeapSort; ft@#[Bkx
import org.rut.util.algorithm.support.ImprovedMergeSort; Y?K?*`Pkc1
import org.rut.util.algorithm.support.ImprovedQuickSort; .+?]"1>]
import org.rut.util.algorithm.support.InsertSort; m*iSW]&
import org.rut.util.algorithm.support.MergeSort; q^^R|X1
import org.rut.util.algorithm.support.QuickSort; m;xa}b{(i
import org.rut.util.algorithm.support.SelectionSort; v)|a}5={
import org.rut.util.algorithm.support.ShellSort; h\Y~sm?!`
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/** ) d'H&c3
* @author treeroot daSx^/$R
* @since 2006-2-2 u^]Gc p
* @version 1.0 W]bytsl
*/ B+R|fQ
public class SortUtil { Z]2z*XD
public final static int INSERT = 1; nB :iG
public final static int BUBBLE = 2; {hf_Xro&
public final static int SELECTION = 3; m*)jndXY
public final static int SHELL = 4; JS\]|~Gd
public final static int QUICK = 5; ,+OVRc
public final static int IMPROVED_QUICK = 6; z.)*/HGJm
public final static int MERGE = 7; @QnKaZ8jW
public final static int IMPROVED_MERGE = 8; }LX!dDuwA
public final static int HEAP = 9; 99'c\[fd'
[K4k7$
public static void sort(int[] data) { IS[q'Cv*
sort(data, IMPROVED_QUICK); "B"ql-K
} g%^/^<ei
private static String[] name={ NgsEEPu?
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" ,SdxIhL
}; [GK##z'5
,d.5K*?aI
private static Sort[] impl=new Sort[]{ `{yI| Wf
new InsertSort(), {`)oxzR
new BubbleSort(), L:@COy
new SelectionSort(), Wq1OYZ,
new ShellSort(), ~@<o-|#
new QuickSort(), wpQp1){%Q
new ImprovedQuickSort(), ?=_w5D.3J
new MergeSort(), kDRxu!/
new ImprovedMergeSort(), @_c&lToj_
new HeapSort() g.;2N9
}; &F[N$6:v
?/,V{!UTtq
public static String toString(int algorithm){ ~K|ha26W
return name[algorithm-1]; bYhG`1,$-a
} Y![i=/
N 5{w
public static void sort(int[] data, int algorithm) { 4wEkxCWp/
impl[algorithm-1].sort(data); )`W|J%w+
} vGJw/ij'X
+Qzl-eN/+
public static interface Sort { } 21!b :a
public void sort(int[] data); B 'd@ms
} bng/v
/=#~8
public static void swap(int[] data, int i, int j) { &FZ~n?;hQ
int temp = data; ) R5[aO
data = data[j]; &K=)YpT
data[j] = temp; ,PKUgL}w
} B'vIL'
} 1Zo3K<*J