[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; \|62E):i1
} +o'. !sRH
int i1=l; "bf8[D
int i2=mid+1; 34;c00
for(int cur=l;cur<=r;cur++){ n"FOCcTIs
if(i1==mid+1) (sqS(xIY
data[cur]=temp[i2++]; ljt1:@SN(
else if(i2>r) 3:Z(tM&-O
data[cur]=temp[i1++]; cC}s5`
else if(temp[i1] data[cur]=temp[i1++]; @bqCs^U35
else ?sS'T7r v
data[cur]=temp[i2++]; -S,dG|
} YSa:"A
} hq,;H40%/
[tD*\\IA
} iBo-ANnK9
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改进后的归并排序: o~4n8
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package org.rut.util.algorithm.support; c(Ha"tBJ
rM=Hd/ki5
import org.rut.util.algorithm.SortUtil; {eZj[*P
)<^ ~${$U
/** ok6e=c '
* @author treeroot :T{or-
* @since 2006-2-2 /XMmE
* @version 1.0 GrQl3 Xi
*/ 8V|-BP5^
public class ImprovedMergeSort implements SortUtil.Sort { jQ^Ib]"K
HJcZ~5jf
private static final int THRESHOLD = 10; >8JvnBFx=
OT *W]f
/* .ERO*Tj
* (non-Javadoc) w`7l;7[
* c=b\9!hr_E
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) YD+C1*c!
*/ O,OGq0c
public void sort(int[] data) { [ThzLk#m
int[] temp=new int[data.length]; bs`/k&'
mergeSort(data,temp,0,data.length-1); wcL0#[)
} A.h?#%TLL
8U(a&G6gn
private void mergeSort(int[] data, int[] temp, int l, int r) { ffB]4
int i, j, k; xK y<o
int mid = (l + r) / 2; A&M/W'$s
if (l == r) >u/yp[Ky
return; >b$<lo
if ((mid - l) >= THRESHOLD) ;<][upn
mergeSort(data, temp, l, mid); )?xt=9Lh
else F"F(s!
insertSort(data, l, mid - l + 1); /Z@.;M
if ((r - mid) > THRESHOLD) CTP%
mergeSort(data, temp, mid + 1, r); cq=R
else }>1E,3A:%G
insertSort(data, mid + 1, r - mid); 4dok/ +Ec
Qdn:4yk
for (i = l; i <= mid; i++) { -qEr-[z
temp = data; W ,U'hk%
} NkJ^ecn%)
for (j = 1; j <= r - mid; j++) { y(S0 2v>l
temp[r - j + 1] = data[j + mid]; jF5JpyOc
} B~ez>/H^
int a = temp[l]; .F6#s
int b = temp[r]; b;O+QRa
for (i = l, j = r, k = l; k <= r; k++) { xD#/@E1'Y
if (a < b) { .iYgRW=T
data[k] = temp[i++]; @t^2/H ?O
a = temp; <|_Ey)1 6
} else { JQ1VCG
data[k] = temp[j--]; >I!(CM":s$
b = temp[j]; zc{C+:3$^
} "D/ fB%h`
} 8`~]9ej
} 4HHf3j!5
k^]~NP
/** ;i:7E#@
* @param data ' #mC4\<W8
* @param l ,-"]IR!,w
* @param i }*t~&l0
*/ cs5Xd
private void insertSort(int[] data, int start, int len) { p~b$+8#+
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); w '"7~uN
} 3OZ}&[3
} :W&\})
} {h=Ai[|l4Q
} pZjFpd|
[~o3S$C&7
堆排序： -+=8&Wa
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package org.rut.util.algorithm.support; {HU48v"W
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import org.rut.util.algorithm.SortUtil; : L>d]Hn
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/** *k}d@j,*"
* @author treeroot ~h/U ;Da
* @since 2006-2-2 FN R& :
* @version 1.0 gkdjH8(2
*/ o(zg_!P
public class HeapSort implements SortUtil.Sort{ L}mhMxOTi
%Fv)$ :b
/* (non-Javadoc) #?*jdN:
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) d0^2<
*/ +x2xQ8#|~~
public void sort(int[] data) { P:vy
MaxHeap h=new MaxHeap(); O+N-x8W{
h.init(data); <gy'@w?
for(int i=0;i h.remove(); 0d2%CsMS"D
System.arraycopy(h.queue,1,data,0,data.length); T,fz/5w
} z|2liQrf+
KOQTvJ_#
private static class MaxHeap{ Bz{ g4!ku
/b|sv$BN
void init(int[] data){ xpk|?/6
this.queue=new int[data.length+1]; {;zPW!G
for(int i=0;i queue[++size]=data; k y98/6
fixUp(size); c>SeOnf
} ;GAYcVB
} 2$91+N*w9
1rEP)66N
private int size=0; Xwi&uyvU&
TG9)x|!
private int[] queue; UPYM~c+}
bqO"k t
public int get() { 1#(1Bs6X
return queue[1]; !iw 'tHhR
} ^~Sn{esA
f+V':qz
public void remove() { "->:6Oe2
SortUtil.swap(queue,1,size--); B(falmXJ
fixDown(1); ~-+Zu<
} LDsYr]
file://fixdown FScQS.qF
private void fixDown(int k) { ?>Aff`dHY
int j; TRZ^$<AG
while ((j = k << 1) <= size) { vF&b|V+,
if (j < size %26amp;%26amp; queue[j] j++; Nz;;X\GI
if (queue[k]>queue[j]) file://不用交换 c0 |p34
break; tp<VOUa
SortUtil.swap(queue,j,k); [P/gM3*'
k = j; v(iUo&Ge
} sfa'\6=O
} sFQ|lU"n
private void fixUp(int k) { 3_$eQ`AAA
while (k > 1) { Ub,unU
int j = k >> 1; "}! rM6 h
if (queue[j]>queue[k]) {76!
break; R=PzR;8
SortUtil.swap(queue,j,k); ^ne8~ ;Q
k = j; 7,TWCVap
} ~|rkt`8p
} jGn^<T\
L|LTsRIq
} )^TQedF
PS6`o
} cy4'q?r
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SortUtil： l'QR2r7&.
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package org.rut.util.algorithm; iC]lO
UD{/L"GG
import org.rut.util.algorithm.support.BubbleSort; OX4D'
import org.rut.util.algorithm.support.HeapSort; )*ckJK
import org.rut.util.algorithm.support.ImprovedMergeSort; =]e^8;e9
import org.rut.util.algorithm.support.ImprovedQuickSort; +pvJ?"J
import org.rut.util.algorithm.support.InsertSort; Br5Io=/wg
import org.rut.util.algorithm.support.MergeSort; !Yu-a!
import org.rut.util.algorithm.support.QuickSort; $4 Uy3C+6
import org.rut.util.algorithm.support.SelectionSort; !\1W*6U8;
import org.rut.util.algorithm.support.ShellSort; -(1\`g07
.h,xBT`}Ji
/** KU,w9<~i(
* @author treeroot rzDJH:W{2
* @since 2006-2-2 4&e@>
* @version 1.0 |@.<}/
*/ BA,6f?ktXS
public class SortUtil { s.'\&B[
public final static int INSERT = 1; p;$9W+H0
public final static int BUBBLE = 2; : !3y>bP)
public final static int SELECTION = 3; Nl`ry2"<
public final static int SHELL = 4; C4]%pi
public final static int QUICK = 5; 5#.\pR{Gd
public final static int IMPROVED_QUICK = 6; vc#oALc&
public final static int MERGE = 7; vv/,Rgv
public final static int IMPROVED_MERGE = 8; ^z^e*<{WEl
public final static int HEAP = 9; I!gj;a?R
9 w1ONw8v
public static void sort(int[] data) { ?bAFYF0!I
sort(data, IMPROVED_QUICK); A@(h!Cq
} T+RI8.#o
private static String[] name={ '*u;:[73
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" \_nmfTr!K
}; yPYJc
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private static Sort[] impl=new Sort[]{ #Hi]&)p_
new InsertSort(), @BUqQ9q:
new BubbleSort(), AijTT%
new SelectionSort(), $?AA"Nz
new ShellSort(), A(OfG&!
new QuickSort(), }Xj_Y]T
new ImprovedQuickSort(), d~-p;i
new MergeSort(), *)1Vs'!-
new ImprovedMergeSort(), Wxau]uix
new HeapSort() [P=[hj;
}; o!`O i5
Wx$q:$h@q
public static String toString(int algorithm){ FJ8@b
return name[algorithm-1]; BK9x`Oo2
} qO{ ZZ*
2,V+?'^j
public static void sort(int[] data, int algorithm) { PMhhPw]
impl[algorithm-1].sort(data); jUvA<r
} L~y tAZ,
'h>5&=r
public static interface Sort { lc7a@qnw
public void sort(int[] data); bDBO+qA
} 8`2<g0V2
,G|aLBn
public static void swap(int[] data, int i, int j) { 5;8B!%b
int temp = data; X|E+K
data = data[j]; rw[{@|)'z
data[j] = temp; A]Tcj^#
} ,GkW. vEU
} An #Hb=