[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; t+m$lqm
} ],qG!,V
int i1=l; ^YenS6`F
int i2=mid+1; FK@rZP
for(int cur=l;cur<=r;cur++){ j\@s pbE@
if(i1==mid+1) iknBc-TLD
data[cur]=temp[i2++]; 9Hlu%R
else if(i2>r) hd/5*C{s
data[cur]=temp[i1++]; 9p2"5x
else if(temp[i1] data[cur]=temp[i1++]; ,8+SQo#3
else p8Lb*7W
data[cur]=temp[i2++]; :!g|0CF_
} :V}8a!3h
} ,6i67!lb
c{|soc[#
} #(ANyU(#e
>9<h?F%S
改进后的归并排序: r^WO$u|@i
-Zocu<Rs
package org.rut.util.algorithm.support; r6PiZgR
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import org.rut.util.algorithm.SortUtil; (V{bfDu&h@
r{>tTJFD(:
/** {< jLfL1
* @author treeroot %J~8a_vO
* @since 2006-2-2 ]~3wq[O
* @version 1.0 zHDC8m
*/ /A|ofAr)
public class ImprovedMergeSort implements SortUtil.Sort { "^22Y}VB
si3i#l&.b_
private static final int THRESHOLD = 10; qi7dcn@d
@hl5^d"l
/* N<"_5
* (non-Javadoc) =2J+}ac
* ,0lRs
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) sGMC$%e}
*/ "o;l8$)VL
public void sort(int[] data) { X*$ 7g;
int[] temp=new int[data.length]; 84)S0Y8w
mergeSort(data,temp,0,data.length-1); 1m}'Y@I
} t(p
gTO%
private void mergeSort(int[] data, int[] temp, int l, int r) { #\%GrtM
int i, j, k; t~sW]<qjp
int mid = (l + r) / 2; MT%ky
if (l == r) s![=F}ck
return; 5A~w_p*}
if ((mid - l) >= THRESHOLD) CEqfsKrsxE
mergeSort(data, temp, l, mid); 1hi^
else \&ERSk2
insertSort(data, l, mid - l + 1); GlQ=M)E
if ((r - mid) > THRESHOLD) (t<i?>p
mergeSort(data, temp, mid + 1, r); g>OGh o
else k?|VFh1
insertSort(data, mid + 1, r - mid); Lm,io\z
f=}u;^
for (i = l; i <= mid; i++) { ;u}MG3Y8
temp = data; oJyC{G
} X=${`n%LG
for (j = 1; j <= r - mid; j++) { !Q#u i[0q
temp[r - j + 1] = data[j + mid]; P,I3E?! j
} uZ<Bfrc
int a = temp[l]; ~g1@-)zYxK
int b = temp[r]; O=c&
for (i = l, j = r, k = l; k <= r; k++) { Axj<e!{D
if (a < b) { D!qtb6<.
data[k] = temp[i++]; n$#^gzU4
a = temp; % fA0XRM
} else { HAGWA2wQ
data[k] = temp[j--]; bcz<t)
b = temp[j]; O!Mm~@MoA
} xv4nYm9
} z)QyQ
} )TRDM[u
}Z0)FU+
/** e<iTU?eJM
* @param data q.Z0Q
* @param l NmOQ7T
* @param i w$61+KHK
*/ b$rBxe\
private void insertSort(int[] data, int start, int len) { zx=A3I%7 A
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 1REq.%/=
} Gp32\^H|<
} R`TM@aaS:
} _@?]!J[
} w:z_EV!&
r'xa'6&
堆排序： -#rFCfPy^
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package org.rut.util.algorithm.support; {a%T <WW
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import org.rut.util.algorithm.SortUtil; @H7dQ,%
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/** 2eyvY|:Q>
* @author treeroot IO v4Zx<)
* @since 2006-2-2 p)TH^87
* @version 1.0 'y'>0'et
*/ Eptsxyz{
public class HeapSort implements SortUtil.Sort{ Kq-y1h]7H
aASnk2DFd
/* (non-Javadoc) hrEKmRmF-
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) v,g,c`BjK
*/ 3b%y+?-{\u
public void sort(int[] data) { W=F?+KgL
MaxHeap h=new MaxHeap(); [0)iY%^
h.init(data); i}+dctg/
for(int i=0;i h.remove(); >OiC].1
System.arraycopy(h.queue,1,data,0,data.length); ?;^_%XSQ*
} Y;-"Z
zg8m(=k'
private static class MaxHeap{ {/R4Q1
NbkWy
void init(int[] data){ |$bZO`^
this.queue=new int[data.length+1]; |6_<4lmTxF
for(int i=0;i queue[++size]=data; pjbKMx
fixUp(size); _|*3uGo:
} 6 D!,vu
} ;]<$p[m
mRQ F5W6
private int size=0; .0\Wu+
li/O&@g`
private int[] queue; nNBxT+3*i
KwpNS(]I
public int get() { 7sHtJr
return queue[1]; {wA@5+[
} ;'=!Fv
K})j5CJ/
public void remove() { y1k""75
SortUtil.swap(queue,1,size--); {d^&$~
fixDown(1); ijyj}gpWha
} W&+UF'F2
file://fixdown ly,d =
private void fixDown(int k) { F_V~UX1D
int j; )O2^?Q quS
while ((j = k << 1) <= size) { _NqEhf:8
if (j < size %26amp;%26amp; queue[j] j++; "%>/rh2Iq
if (queue[k]>queue[j]) file://不用交换 (VBoZP=W
break; 3fM
SortUtil.swap(queue,j,k); HC!$Z`}Y
k = j; RJBNY;0
} H6'xXS
} w="I*7c@
private void fixUp(int k) { n"_EDb
while (k > 1) { wXNFL9F8
int j = k >> 1; k}jH
if (queue[j]>queue[k]) ~!)_3o
break; :2?i9F0_
SortUtil.swap(queue,j,k); /6L\`\g
k = j; 3n6_yK+D
} *h-nI=
} W.0dGUi*
tQ=U22&7
} Gi;eDrgj~
}Qg9l|
} 4P2)fLmc
$:mCyP<y
SortUtil： }.`ycLW'
. 1?AU6\
package org.rut.util.algorithm; lza'l
j##IJm
import org.rut.util.algorithm.support.BubbleSort; ]9A9q<lZ
import org.rut.util.algorithm.support.HeapSort; ]^aece t
import org.rut.util.algorithm.support.ImprovedMergeSort; -V4@BKI8
import org.rut.util.algorithm.support.ImprovedQuickSort; o*r\&!NIw
import org.rut.util.algorithm.support.InsertSort; q[dls_
import org.rut.util.algorithm.support.MergeSort; chfj|Ce]x
import org.rut.util.algorithm.support.QuickSort; $ n 7dIE
import org.rut.util.algorithm.support.SelectionSort; $i~DUT(
import org.rut.util.algorithm.support.ShellSort; Pf@8C{I
DZLSn Ax
/** s "*Cb*
* @author treeroot <VgnrqF6:
* @since 2006-2-2 ze,HNFg@>
* @version 1.0 8$3Tu"+;
*/ cB?HMLbG>
public class SortUtil { >cSc
public final static int INSERT = 1; >`s2s@Mx
public final static int BUBBLE = 2; A")B<BK
public final static int SELECTION = 3; jOEb1
public final static int SHELL = 4; !:e}d+F
public final static int QUICK = 5; +J+]P\:
public final static int IMPROVED_QUICK = 6; #^Sd r-
public final static int MERGE = 7; :ykQ[d`:|
public final static int IMPROVED_MERGE = 8; +s_@964
public final static int HEAP = 9; B6=8cf"i
C=9|K`g5 R
public static void sort(int[] data) { ~}wPiu,
sort(data, IMPROVED_QUICK); P9Rq'u
} &t%ICz&3
private static String[] name={ |\N[EM%.@
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" .c~;/@{
}; 5O*.qp?
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private static Sort[] impl=new Sort[]{ |!rD2T\Ef
new InsertSort(), dos$d3B4
new BubbleSort(), rD<@$KpP
new SelectionSort(), gD&%$&q
new ShellSort(), zy5@K)
new QuickSort(), e2/&X;2
new ImprovedQuickSort(), h r t\
new MergeSort(), [/5>)HK} C
new ImprovedMergeSort(), `iQyKZS/+
new HeapSort() dsJ}C|N
}; m<"1*d~
`2S%l,>)#
public static String toString(int algorithm){ M,cI0i
return name[algorithm-1]; MLa]s* ; d
} !;fkc0&!
P1z6sGG
public static void sort(int[] data, int algorithm) { !|Vjv}UO
impl[algorithm-1].sort(data); u%h]k ,(E
} |h6)p;`gc
"kf7??Z
public static interface Sort { m,*t}j0 7
public void sort(int[] data); 1Pn!{ bU3@
} ;~/
o+6Y/6Xp@
public static void swap(int[] data, int i, int j) { Ct #hl8b:
int temp = data; B.{0,bW?
data = data[j]; "FG6R'
data[j] = temp; VWbgusxJ
} ^R K[-tVV
} "$ u"Py