[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; v2z/|sG
} TZ]Gl4@
int i1=l; @G{DOxE*
int i2=mid+1; &otgN<H9
for(int cur=l;cur<=r;cur++){ W/QOG&g
if(i1==mid+1) 'bO? =+c
data[cur]=temp[i2++]; j_<n~ri-
else if(i2>r) [uV/ Ra*g
data[cur]=temp[i1++]; ~ ?_Z!eS
else if(temp[i1] data[cur]=temp[i1++]; ZDD|MH
else d> AmM!J
data[cur]=temp[i2++]; vw 2@}#\:
} DKCy h`
} xfSvvCy
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} Oz7v hOU
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改进后的归并排序: 73`UTXvWU
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package org.rut.util.algorithm.support; VX%\_@
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import org.rut.util.algorithm.SortUtil; #XPU$=
=Z$6+^L
/** FZ/&[;E!
* @author treeroot ".Ug A\0
* @since 2006-2-2 M 4?3l
* @version 1.0 K`<P^XJr
*/ p}z0(lQ*~
public class ImprovedMergeSort implements SortUtil.Sort { SQk!o{
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private static final int THRESHOLD = 10; giq`L1<
wH<*
/* vX%gcs/@
* (non-Javadoc) XrF9*>ti?
* de=T7,G#
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) O}V2>W$
*/ tDkqwF),
public void sort(int[] data) { ^"-2fJ
int[] temp=new int[data.length]; 2S/7f:
mergeSort(data,temp,0,data.length-1); q<7n5kJ~
} 4|thDb)]
"k/@tX1:R
private void mergeSort(int[] data, int[] temp, int l, int r) { *PPFk.#x
int i, j, k; g!uhy}
int mid = (l + r) / 2; C5z4%,`f
if (l == r) yfrgYA
return; )M~5F,)
if ((mid - l) >= THRESHOLD) c,^-nH'X>
mergeSort(data, temp, l, mid); ~Ua0pS?
else $mlcaH
insertSort(data, l, mid - l + 1); %94"e7Hy
if ((r - mid) > THRESHOLD) k,,}N9
mergeSort(data, temp, mid + 1, r); F(r&:3!97
else u9Ro=#xt
insertSort(data, mid + 1, r - mid); iatQHn>(
7=9jXNk Y
for (i = l; i <= mid; i++) { b3H;Ea?^^<
temp = data; !Fi)-o
} q$P"o].EK
for (j = 1; j <= r - mid; j++) { B!0[LlF+
temp[r - j + 1] = data[j + mid]; <V{BRRx
} t<tBOesQ
int a = temp[l]; M=%p$\x
int b = temp[r]; p-Ju&4fS
for (i = l, j = r, k = l; k <= r; k++) { $8)/4P?OL
if (a < b) { ]@EjKgs
data[k] = temp[i++]; =0S7tNut
a = temp; W7 $yE},z
} else { KH-.Z0 2U
data[k] = temp[j--]; W+vm!7wX0
b = temp[j]; Z:}^fZP
} a%kj)ah
} <[Vr(.A
} 8eNGPuoL)
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/** Tn|reXc0e
* @param data KE_Ze\P
* @param l .*,ZcO
* @param i u4Sa4o
*/ ^,3 >}PU
private void insertSort(int[] data, int start, int len) { a[/p(O
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); ?~$y3<[
} j>U.(K
} u^uW<.#z
} ${?Px c{-
} A/MOY@%G
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堆排序： C9fJLCufC
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package org.rut.util.algorithm.support; <rkF2-K,
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import org.rut.util.algorithm.SortUtil; ,?}TSJKC
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/** :=/DF
* @author treeroot ,{%[/#~6
* @since 2006-2-2 o,d:{tt
* @version 1.0 a P`;Nr=
*/ *Hs5MXNu
public class HeapSort implements SortUtil.Sort{ + 7Z%N9
)TxhJB5|
/* (non-Javadoc) f"[C3o2P
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) dCinbAQ
*/ _C##U;e!
public void sort(int[] data) { ]$7|1-&Y
MaxHeap h=new MaxHeap(); L U7.
h.init(data); ]UNmhF!W>u
for(int i=0;i h.remove(); g,.iM8
System.arraycopy(h.queue,1,data,0,data.length); V Bg\)r[
} A;%fAI2Vr
#PiW\Tq
private static class MaxHeap{ O)hNHIF
v"^G9u
void init(int[] data){ U+\\#5$
this.queue=new int[data.length+1]; ?&[`=ZVn
for(int i=0;i queue[++size]=data; zfS`@{;F`|
fixUp(size); f>Ge Em~
} |'Jz(dv[
} Baq&>]
1vX97n<}
private int size=0; _- { >e
rK"x92P0
private int[] queue; i`X/d=
H=*;3gM,'
public int get() { >1W)J3
return queue[1]; D&.+Dx^G
} UF?qL1w
JVN0];IL}
public void remove() { Qax=_[r
SortUtil.swap(queue,1,size--); Z[ys>\_To
fixDown(1); }LOAT$]XI
} M4`qi3I
file://fixdown H>2)R7h
private void fixDown(int k) { f`T#=6C4|
int j; li(g?|AD
while ((j = k << 1) <= size) { oH$4K8j
if (j < size %26amp;%26amp; queue[j] j++; h(ZZ7(ue
if (queue[k]>queue[j]) file://不用交换 K;Fy&p^d
break; Oo$i,|$$
SortUtil.swap(queue,j,k); ih~ R?W
k = j; :W^ k3/t
} Y'0H2B8
} /alJN`g
private void fixUp(int k) { %qNT<>c
while (k > 1) { <8~bb-U$
int j = k >> 1; *{6{ZKM
if (queue[j]>queue[k]) mqQN*.8*
break; 8a)lrIg
SortUtil.swap(queue,j,k); ><^ ,
k = j; )17CG*K1
} zr2oU '+
} %d3qMnYu
0sIwU!=vm
} 0F/o
VBo=*gn,$
} ;Lr]w8d
R `
SortUtil： ]2Zl\}GwY
"2# #Fcu=
package org.rut.util.algorithm; Dn~c
*> LA30R*v
import org.rut.util.algorithm.support.BubbleSort; q8#zv_>K
import org.rut.util.algorithm.support.HeapSort; :Y>FuE
import org.rut.util.algorithm.support.ImprovedMergeSort; _Fkz^B*
import org.rut.util.algorithm.support.ImprovedQuickSort; &L`^\B]k|
import org.rut.util.algorithm.support.InsertSort; &PZ&'N|P
import org.rut.util.algorithm.support.MergeSort; z[|2od
import org.rut.util.algorithm.support.QuickSort; , Ox$W
import org.rut.util.algorithm.support.SelectionSort; ;S0Kf{DN2
import org.rut.util.algorithm.support.ShellSort; <<w*_GM
\:y oS>G
/** *be"$Q
* @author treeroot [3D*DyQt
* @since 2006-2-2 Nux
* @version 1.0 Q-<h)WTA
*/ VDT.L,9
public class SortUtil { _TntZv.?
public final static int INSERT = 1; R`KlG/Tk
public final static int BUBBLE = 2; ?mwa6]
public final static int SELECTION = 3; hg7^#f95u
public final static int SHELL = 4; vB<9M-sa0
public final static int QUICK = 5; )sN}ClgJ
public final static int IMPROVED_QUICK = 6; 45Hbg
public final static int MERGE = 7; 2Y>#FEW/
public final static int IMPROVED_MERGE = 8; q?y-s
public final static int HEAP = 9; XFSHl[uS1
(T!#7
public static void sort(int[] data) { ;F|8#! (
sort(data, IMPROVED_QUICK); @d|3c7` A
} x3:d/>b
private static String[] name={ )LAG$Cn
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" *b7evU *1
}; ^P|Zze zwU
#+&"m7 s
private static Sort[] impl=new Sort[]{ f cnv[B..{
new InsertSort(), ,Cd4Q7T
new BubbleSort(), >-,$
new SelectionSort(), %mAwK<MY`
new ShellSort(), J@A^k1B
new QuickSort(), ioBYxbY`
new ImprovedQuickSort(), {>UT'fa-
new MergeSort(), L8J] X7
new ImprovedMergeSort(), Lb#PiTJI
new HeapSort() Vkfc&+
}; 5(thDZ!
<Uu[nUJ
public static String toString(int algorithm){ / hg)=p
return name[algorithm-1]; ?$MO!
} ]?T,J+S
MU4BAN
public static void sort(int[] data, int algorithm) { P~84#5R1
impl[algorithm-1].sort(data); +~EnrrT+W
} H#M;TjR
@^%YOorr
public static interface Sort { 9"?;H%.
public void sort(int[] data); MoXai0d%
} @~&|BvK% \
ydMhb367|
public static void swap(int[] data, int i, int j) { 7)RRCsn
int temp = data; 5S[:;o
data = data[j]; 3:<[;yo
data[j] = temp; I+QM":2
} ]@m`bs_6
} XP[~ :+