[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; _C9*M6IU
} 0\tk/<w2
int i1=l; { 7y.0_Y
int i2=mid+1; %Z-^Bu8;y
for(int cur=l;cur<=r;cur++){ -GkNA"2M[
if(i1==mid+1) tt=?*n
data[cur]=temp[i2++]; ,s'78Dc$
else if(i2>r) Xtqjx@ye
data[cur]=temp[i1++]; 7<Fp3N 3
else if(temp[i1] data[cur]=temp[i1++]; QDlEby m
else Q)\7(n
data[cur]=temp[i2++]; qvz2u]IOw
} +zxj-diM
} .I{b]6
DpIv <m]
} uX{n#i,~L
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改进后的归并排序: U^4 /rbQ
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package org.rut.util.algorithm.support; #5GIO
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import org.rut.util.algorithm.SortUtil; %iWup:
3kFOs$3
/** !|`G<WD
* @author treeroot NLFSw
* @since 2006-2-2 ;aBK4<-vl
* @version 1.0 kLVf}J~?
*/ 0uzm@'^
public class ImprovedMergeSort implements SortUtil.Sort { <@FOqi{o{
'1A S66k
private static final int THRESHOLD = 10; oxE'u<
.lfKS!m2
/* 2wE?O^J
* (non-Javadoc) $:"r$7
* o{yEF1,c\
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ~lMw*Qw^
*/ X l#P@60
public void sort(int[] data) { <=8REA?
int[] temp=new int[data.length]; c6sGjZdR
mergeSort(data,temp,0,data.length-1); i"%X[(U7
} }}XYV eI
W R@=[G#TJ
private void mergeSort(int[] data, int[] temp, int l, int r) { hK9Trrwau
int i, j, k; D.o|pTZ
int mid = (l + r) / 2; T;jp2 #
if (l == r) )n 1b
return; mD-qJ6AM
if ((mid - l) >= THRESHOLD) J@Eqqyf"
mergeSort(data, temp, l, mid); c%v[p8 %
else U>6MT@\
insertSort(data, l, mid - l + 1); Ed,`1+
if ((r - mid) > THRESHOLD) 5Z}]d@
mergeSort(data, temp, mid + 1, r); 1a3rA
else R*IO%9O
insertSort(data, mid + 1, r - mid); tWQ_.,ld
Rkm1fYf
for (i = l; i <= mid; i++) { ;4tVFqR
temp = data; |;_NCy8i3X
} wXp A1,i
for (j = 1; j <= r - mid; j++) { ZB GLwe
temp[r - j + 1] = data[j + mid]; fv_}7t7
} Mit,X
int a = temp[l]; SV16]Vc
int b = temp[r]; 02:]
for (i = l, j = r, k = l; k <= r; k++) { ,<F=\G_f
if (a < b) { 1C\OL!@L
data[k] = temp[i++]; Htn=h~U`z
a = temp; F<q'ivj:w
} else { 9Y!N\-x`
data[k] = temp[j--]; l CHaRR7
b = temp[j]; ,80qwN,
} QU^*(HGip
} qPZ'n=+
} /%9D$\
lY/{X]T.(
/** \$YKw0K
* @param data =; Gw=m(
* @param l Ig75bZz
* @param i SLp &_S@4
*/ ,#[0As29u
private void insertSort(int[] data, int start, int len) { r(xh5{^x
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); jY%&G#4
} }&D~P>1
} B*7Y5_N
} RY'f%c
} j78WPG
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堆排序： `s5<PCq
I|69|^
package org.rut.util.algorithm.support; P'.MwS
M#X8Rs1`
import org.rut.util.algorithm.SortUtil; 0fwmQ'lW(
q/U(j&8W{
/** HA&7 ybl
* @author treeroot +\g/KbV7
* @since 2006-2-2 rx2?y3pv
* @version 1.0 #\s*>Z
*/ BrF/-F
public class HeapSort implements SortUtil.Sort{ ~_opU(;f
WLl_;BgN
/* (non-Javadoc) eKjmU| H
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) CXt9 5O?
*/ I?`}h}7.
public void sort(int[] data) { O b'B?
MaxHeap h=new MaxHeap(); >qj.!npQD
h.init(data); !v/5G_pr
for(int i=0;i h.remove(); 0_'(w;!wq:
System.arraycopy(h.queue,1,data,0,data.length); Z(DCR/U=(>
} X`i'U7%I
S3#NGBZ/
private static class MaxHeap{ YXCltME
ZrY#B8
void init(int[] data){ V]I@&*O~r
this.queue=new int[data.length+1]; 9U[Gh97Sf
for(int i=0;i queue[++size]=data; K$v SdpC
fixUp(size); GL;@heP
} o6`4y^Q{/
} yg({g "
=k.:XblEe[
private int size=0; DV+M;rs
;W%nBdE6|
private int[] queue; X&C&DTB
fP3e{dVf
public int get() { UNLmnj;-Q
return queue[1]; p7 s#j
} ;R[ xo!
ZEY="pf
public void remove() { }/tT=G]91
SortUtil.swap(queue,1,size--); N>h/!# ZC
fixDown(1); B ~u9"SR.
} 590.mCm
file://fixdown F`!B!uY
private void fixDown(int k) { ;+v5li
int j; t][U`1>i
while ((j = k << 1) <= size) { e^v5ai
if (j < size %26amp;%26amp; queue[j] j++; /V'^$enK!}
if (queue[k]>queue[j]) file://不用交换 Pjz_KO/
break; /|7@rH([{
SortUtil.swap(queue,j,k); b"D? @dGB,
k = j; (!b_o A8V
} ed3d 6/%HR
} \YUl$d0
private void fixUp(int k) { /#mq*kNIM6
while (k > 1) { -,xCUG<g
int j = k >> 1; x"g-okLN
if (queue[j]>queue[k]) j /d?c5
break; Yz<,`w5/6~
SortUtil.swap(queue,j,k); }"} z7Xb0
k = j; X;2I' Kg
} ~kDR9s7
} g%C!)UbT
2Y~UeJ_\Lq
} G.j R
-Iq W@|N
} V[9#+l~#
T,'{0q
SortUtil： 4Vv~
C%c}lv8;^
package org.rut.util.algorithm; OGl>i
NxOiT#YH
import org.rut.util.algorithm.support.BubbleSort; !v/j*'L<M}
import org.rut.util.algorithm.support.HeapSort; z-9@K<`H
import org.rut.util.algorithm.support.ImprovedMergeSort; ywQ>T+
import org.rut.util.algorithm.support.ImprovedQuickSort; Tbf@qid e
import org.rut.util.algorithm.support.InsertSort; A%Ov.~&\G
import org.rut.util.algorithm.support.MergeSort; `2WtA_
import org.rut.util.algorithm.support.QuickSort; >Q(+H-w
import org.rut.util.algorithm.support.SelectionSort; \VL_
import org.rut.util.algorithm.support.ShellSort; OO7sj@
xg:r5Z/|)
/** Fe:M'.
* @author treeroot ;N+ v x
* @since 2006-2-2 C(w?`]Qs
* @version 1.0 }kNbqwVP
*/ q,e{t#t
public class SortUtil { iTX:*$~I
public final static int INSERT = 1; UJ\[^/t
public final static int BUBBLE = 2; ,]:vk|a#;
public final static int SELECTION = 3; A$6T)
public final static int SHELL = 4; q5Bj0r[/o
public final static int QUICK = 5; WO}l&Q
public final static int IMPROVED_QUICK = 6; 8Ce|Q8<8]
public final static int MERGE = 7; `5HFRgL`.
public final static int IMPROVED_MERGE = 8; su?{Cj6*
public final static int HEAP = 9; \vH /bL
E1|>O
public static void sort(int[] data) { | c:E)S\
sort(data, IMPROVED_QUICK); knX*fp
} |igr3p5Fw
private static String[] name={ <N4)X"s
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 2yB@)?V/
}; %VV\biO]
t)#dR._q
private static Sort[] impl=new Sort[]{ SxX2+|0g`g
new InsertSort(), 7o+JQ&fF;
new BubbleSort(), 1v<,nABuJ6
new SelectionSort(), sIVVF#0}]
new ShellSort(), |b BA0.yS
new QuickSort(), #
new ImprovedQuickSort(), ]+U:8*
new MergeSort(), .=~-sj@k
new ImprovedMergeSort(), .5S< G)Ja
new HeapSort() AQUl:0!
}; P#0U[`ltK
/~8<;N>,+
public static String toString(int algorithm){ `:aml+
return name[algorithm-1]; B%]yLJ
} ZqDanDM
jfLkp>2E'
public static void sort(int[] data, int algorithm) { jX9{Ki"
impl[algorithm-1].sort(data); mQbpv'N
} eX{:&Do
wsfN \6e
public static interface Sort { 35;UE2d)<
public void sort(int[] data); \!*3bR
} /k$H"'`j4
OI8Hf3d=
public static void swap(int[] data, int i, int j) { {vp|f~}zTw
int temp = data; kVqRl%/3Tb
data = data[j]; !nm[ZrSP
data[j] = temp; (O[:-Aqm
} #`g..3ey
} 4s:S_Dw