[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; DycXJ3eQ
} HVhP |+
int i1=l; ?>iUz.];t
int i2=mid+1; w^("Pg`
for(int cur=l;cur<=r;cur++){ U=7nz|
if(i1==mid+1) dsj}GgG?Z
data[cur]=temp[i2++]; qS"#jxc==+
else if(i2>r) ]T)<@bmL
data[cur]=temp[i1++]; aEh9za
else if(temp[i1] data[cur]=temp[i1++]; ||.Hv[ ]V*
else Iqn (NOq^[
data[cur]=temp[i2++]; N3*1,/,l.
} F_m' 9KX4E
} TIt\
9_,f)2)~W
} 1Lk(G9CoY
/HS"{@Z"h
改进后的归并排序: 0FY-e~xr
&%GAPs%
package org.rut.util.algorithm.support; aWH
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import org.rut.util.algorithm.SortUtil; /nuz_y\J
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/** k`A39ln7wu
* @author treeroot -%gEND-AP
* @since 2006-2-2 eO(U):C2
* @version 1.0 hqlQ-aytS
*/ A0U9,M
public class ImprovedMergeSort implements SortUtil.Sort { 2ZEGE+0
erbk(
private static final int THRESHOLD = 10; rf%VSxD9
p\F%Nj,
/* p!=O>b_f
* (non-Javadoc) 7S&$M-k
* 6>)nkD32g
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Bf]Bi~w<
*/ "P54|XIJ\
public void sort(int[] data) { ?FjnG_Uz`D
int[] temp=new int[data.length]; Wz"H.hf
mergeSort(data,temp,0,data.length-1); Kop(+]Q&n
} h3&|yS|
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private void mergeSort(int[] data, int[] temp, int l, int r) { ?@;)2B|q
int i, j, k; s,8zj<dUv
int mid = (l + r) / 2; >`SeX:
if (l == r) q<!-Anc
return; ^G(Ee+PN@
if ((mid - l) >= THRESHOLD) OXbShA&1
mergeSort(data, temp, l, mid); 5E"^>z
else M?L$xE_&
insertSort(data, l, mid - l + 1); g}W|q"l?i
if ((r - mid) > THRESHOLD) P\<:.8@$S
mergeSort(data, temp, mid + 1, r); I[v`)T'_{
else W]7/ e
insertSort(data, mid + 1, r - mid); .-/IV^lGv
.|5$yGEF_+
for (i = l; i <= mid; i++) { !U>WAD9
temp = data; vNrn]v=|}7
} Z b$]9(RS
for (j = 1; j <= r - mid; j++) { Qubu;[0+a
temp[r - j + 1] = data[j + mid]; 6]d]0TW_
} qP<D9k>
int a = temp[l]; SY[3O
int b = temp[r]; 3X11Gl
for (i = l, j = r, k = l; k <= r; k++) { R3l{.{3p2
if (a < b) { zxCx2.7
data[k] = temp[i++]; $7c,<=
a = temp; 3\Q9>>
} else { /e?0Iv" 8>
data[k] = temp[j--]; dt,Z^z+"E
b = temp[j]; d[J_iD{ &
} ^r(My}
} D9A%8[Yo
} jVQ89vf ~
RR ^7/-
/** DyiJ4m}kh
* @param data 3Cc#{X-+
* @param l D\9-/p
* @param i UO@K:n
*/ VZI!rFac
private void insertSort(int[] data, int start, int len) { 3B 'j?+A
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); fz:(mZ%
} p^k0Rad
} )"6-7ii7(f
} $HsNV6
} ~'KqiUY
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堆排序： $Oy&POe
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package org.rut.util.algorithm.support; ?z&%VU"
lV%1I@[M
import org.rut.util.algorithm.SortUtil; _W_< bI34
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/** ,>S7c
* @author treeroot cPNc$^Y
* @since 2006-2-2 O.ce=E
* @version 1.0 vQK/xg
*/ bIyg7X)/
public class HeapSort implements SortUtil.Sort{ \rzMgR$/rj
uHSnZ"#
/* (non-Javadoc) qx[c0X!
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ektU,Oo
*/ )3:0TFS}}k
public void sort(int[] data) { >>$`]]7
MaxHeap h=new MaxHeap(); &k%>u[Bo
h.init(data); /G'3!S
for(int i=0;i h.remove(); A8*zB=C
System.arraycopy(h.queue,1,data,0,data.length); CCe>*tdf
} |&rCXfC
R=LiB+p
private static class MaxHeap{ 35e{{Gn)v
vBl:&99[/
void init(int[] data){ pF8 #H~
this.queue=new int[data.length+1]; \"nut7";2
for(int i=0;i queue[++size]=data; o?hr>b
fixUp(size); &tAYF_}
} -R:_o1"
} cS9jGD92
@|DQZt
private int size=0; 0~^RHb.NA8
mQ"uG?NE
private int[] queue; pLtw|S'4
2icQ (H;
public int get() { E6-*2U)k+
return queue[1]; M lR~`B}m
} /z*Z+OT2
C\GP}:[T3
public void remove() { _<F)G,=
SortUtil.swap(queue,1,size--); X$ZVY2
fixDown(1); A!B.+p[G
} 4v hz`1
file://fixdown za@/4z
private void fixDown(int k) { uwSSrT
int j; 0>N6.itOz
while ((j = k << 1) <= size) { J4"Fj, FS
if (j < size %26amp;%26amp; queue[j] j++; fyb;*hgu
if (queue[k]>queue[j]) file://不用交换 lt&(S)
break; SULFAf<
SortUtil.swap(queue,j,k); daI_@kY"
k = j; Z%qtAPd
} 4>>=TJ!M
} 2.Qz"YDh =
private void fixUp(int k) { ?zf3Fn2y
while (k > 1) { bTaKB-
int j = k >> 1; i9DD)Y<
if (queue[j]>queue[k]) M>]A!W=
break; \MOwp@|y
SortUtil.swap(queue,j,k); sE6>JaH
k = j; *c94'Tcl
} *kl :/#
} $}gMJG
K%? g6j
} jfY7ich
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} Qw}1q!89
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SortUtil： !B}9gT
7t:RQ`$:
package org.rut.util.algorithm; Ww2@!ng
_xp8*2~-
import org.rut.util.algorithm.support.BubbleSort; Mz(Vf1pi%
import org.rut.util.algorithm.support.HeapSort; ?1SsF>|
import org.rut.util.algorithm.support.ImprovedMergeSort; +y?Ilkk;j
import org.rut.util.algorithm.support.ImprovedQuickSort; Z,.Hz\y1D
import org.rut.util.algorithm.support.InsertSort; "^n,(l*4x
import org.rut.util.algorithm.support.MergeSort; J{1H$[W~}
import org.rut.util.algorithm.support.QuickSort; EJ9hgE
import org.rut.util.algorithm.support.SelectionSort; c>B1cR
import org.rut.util.algorithm.support.ShellSort; V}#X'~Ob
l[38cF
/** ,|({[9jA
* @author treeroot ){5Nod{}a
* @since 2006-2-2 @owneSD qN
* @version 1.0 }oRBQP^&K
*/ dz] 5s
public class SortUtil { m0"K^p
public final static int INSERT = 1; tX{yR'Qhu
public final static int BUBBLE = 2; pa[/6(
public final static int SELECTION = 3; ~P1~:AT
public final static int SHELL = 4; P2-&Im`+
public final static int QUICK = 5; {_O!mI*
public final static int IMPROVED_QUICK = 6; o eUi
public final static int MERGE = 7; E^axLp>(I
public final static int IMPROVED_MERGE = 8; 8Y?M:^f~
public final static int HEAP = 9; >1Z"5F7=
'rcqy1-&
public static void sort(int[] data) { v3I^81
sort(data, IMPROVED_QUICK); \!-BR0+y;
} "+F'WCJ-(*
private static String[] name={ y>P+"Z.K%}
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" $oK&k}Q
}; *|fF;-#v
+(3_V$|Dv
private static Sort[] impl=new Sort[]{ ::|~tLFu
new InsertSort(), g"!(@]L!@
new BubbleSort(), "?I#!t%'
new SelectionSort(), f~`=I NrU
new ShellSort(), Q5+1'mzAB
new QuickSort(), 'dLw8&T+W
new ImprovedQuickSort(), !*N9PUM
new MergeSort(), -b(DPte
new ImprovedMergeSort(), { qNPhi
new HeapSort() m+TAaK
}; 1UP=(8j/
tJ\ $%
public static String toString(int algorithm){ a#YK1n[!
return name[algorithm-1]; $F2Uv\7=
} dZU#lg
iVXt@[
public static void sort(int[] data, int algorithm) { lK0ny>RB
impl[algorithm-1].sort(data); [0 F~e
} 5X)8Nwbc
fK J-/{|
public static interface Sort { @NiuT%#c
public void sort(int[] data); \CL8~
} fjh|V9H
C$OVN$lL`8
public static void swap(int[] data, int i, int j) { 2%W;#oi?
int temp = data; H3A$YkK [
data = data[j]; 2r, c{Ah@D
data[j] = temp; UlYFloZ
} @rTB&>`
} b(Nv`'O