[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; yEk|(6+^
} hQ(^;QcSu
int i1=l; kR3wbA
int i2=mid+1; `NsQ&G
for(int cur=l;cur<=r;cur++){ w}#3 pU<<
if(i1==mid+1) @,7r<6E
data[cur]=temp[i2++]; V^4v`}Wgx
else if(i2>r) HEAW](s
data[cur]=temp[i1++]; x)Zb:"
else if(temp[i1] data[cur]=temp[i1++]; pL!,1D!
else K\xnQeS<W
data[cur]=temp[i2++]; ^$}O?y7O
} %@)R
} L>mM6$l
kvuRT`/
} Wp+lI1t
W -HOl!)
改进后的归并排序: .dVV# H
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package org.rut.util.algorithm.support; dNY'uv&Y
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import org.rut.util.algorithm.SortUtil; vH-|#x~
U;TS7A3
/** ;Z`a[\i':
* @author treeroot bq)1'beW
* @since 2006-2-2 1h(IrV5g
* @version 1.0 \y%"tJ~N{
*/ 2wnk~URj
public class ImprovedMergeSort implements SortUtil.Sort { >N2kWSa
A,tg268
private static final int THRESHOLD = 10; J%|;
U,7
/* (gPB@hAv
* (non-Javadoc) FyWf`XTO
* 5'+g[eNyBV
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ("PZ!z1m1
*/ aMGh$\Pg
public void sort(int[] data) { lP)n$?u
int[] temp=new int[data.length]; /3k[3
mergeSort(data,temp,0,data.length-1); |f$ws R`&
} lK7:qo
qdwo2u
private void mergeSort(int[] data, int[] temp, int l, int r) { )m3emMO2
int i, j, k; /m;Bwu
int mid = (l + r) / 2; QxaMe8(
if (l == r) sk<S`J,M/_
return; 568M4xzi
if ((mid - l) >= THRESHOLD) ": BZZ\!
mergeSort(data, temp, l, mid); )quQI)Ym
else ==?%]ZE8
insertSort(data, l, mid - l + 1); K3h];F!^
if ((r - mid) > THRESHOLD) COm^ti-p
mergeSort(data, temp, mid + 1, r); ROfV Y:,M
else \'u+iB g
insertSort(data, mid + 1, r - mid); Yc-5Mr8*,
@ N'P?i
for (i = l; i <= mid; i++) { Q.7X3A8
temp = data; 42hG}Gt
} eYoc(bG(+
for (j = 1; j <= r - mid; j++) { ]j,o!|rx7
temp[r - j + 1] = data[j + mid]; 0Bp0ScE|FA
} |}e"6e%
int a = temp[l]; 9Z=hg[`]<
int b = temp[r]; s/~pr.>-l
for (i = l, j = r, k = l; k <= r; k++) { N4-Y0BO
if (a < b) { dc~vQDNw[X
data[k] = temp[i++]; C"`\[F`.k
a = temp; oNl-!W
} else { Sh-B!
data[k] = temp[j--]; ]Hi1^Y<
b = temp[j]; i@WO>+iB
} Wt!;Y,1s
} w""u]b%:r
} S\sy^Kt~4:
veh=^K%G |
/** Bs`='w%7
* @param data .3Smqwm=Y
* @param l d/*EuJYin<
* @param i >.C$2bW<L
*/ *"F*6+}w"
private void insertSort(int[] data, int start, int len) { n31nORx50
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 23p.g5hJi
} GO][`zZJ]
} ;9=4]YZt
} WRAv>s9
} $1)NYsSH/H
F3Vvqt*2
堆排序： ?W?n l:F
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package org.rut.util.algorithm.support; p"cY/2w:j
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import org.rut.util.algorithm.SortUtil; _J"J[$
cY~lDLyB
/** Mwj7*pxUh
* @author treeroot Wk-.dJ
* @since 2006-2-2 ^MT20pL
* @version 1.0 ={190=\9
*/ "6?Y$y/wm
public class HeapSort implements SortUtil.Sort{ K~5(j{Kb8
9@Z++J.^y
/* (non-Javadoc) =`gFwH<
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) V-i:t,*lk(
*/ ^'sOWIzeiY
public void sort(int[] data) { ;]/cCi
MaxHeap h=new MaxHeap(); @ eP[*Q
h.init(data); Z>@\!$Mc
for(int i=0;i h.remove(); 9B3}LVg\
System.arraycopy(h.queue,1,data,0,data.length); _&@cU<bdee
} 2fUz}w (
gp{P _
private static class MaxHeap{ nQ'AB~ Do
pQ+4++7ID
void init(int[] data){ iJu$&u
this.queue=new int[data.length+1]; lGX_5R
for(int i=0;i queue[++size]=data; &4L+[M{J@4
fixUp(size); K~z9b4a>
} VoUAFEcs
} ]p~,C*UH0
W3i X;-Z
private int size=0; }*0*8~Q'5
K<Y-/t
private int[] queue; * @j#13.
D#&N?<}
public int get() { P1QGfp0-J
return queue[1]; ps?B;P
} Wv)2dD2I
= P{]3K
public void remove() { BhJ~jV"
SortUtil.swap(queue,1,size--); (z<&PP
fixDown(1); C0Ti9
} ;tLu
file://fixdown mh`VZQ@
private void fixDown(int k) { }+f@$L
int j; Fop"m/
while ((j = k << 1) <= size) { D(<20b,
if (j < size %26amp;%26amp; queue[j] j++; >U$,/_uMNW
if (queue[k]>queue[j]) file://不用交换 E>?T<!r~j
break; xlaBOKa%
SortUtil.swap(queue,j,k); "ealYveu
k = j; f8 M=P.jz
} 8[;U|SR"
} . RNQlh3
private void fixUp(int k) { nPUq+cXy]C
while (k > 1) { kST
int j = k >> 1; "I]% aK0
if (queue[j]>queue[k]) aOj5b>>
break; hzc2c.gcF
SortUtil.swap(queue,j,k); EmR#)c~(W
k = j; ghiFI<)VY
} k^.9;FmQ
} G}\E{VvWh
c;bp[Y3R
} N|h}'p
ZUMzWK5Th
} o^},L?
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SortUtil： E-irB/0
vV|u+v{
package org.rut.util.algorithm; z>hG'
h^bbU.
import org.rut.util.algorithm.support.BubbleSort; U:xr['
import org.rut.util.algorithm.support.HeapSort; 8<6;X7<-
import org.rut.util.algorithm.support.ImprovedMergeSort; 6?ylSQ]1
import org.rut.util.algorithm.support.ImprovedQuickSort; nQvv'%v0
import org.rut.util.algorithm.support.InsertSort; C sn"sf
import org.rut.util.algorithm.support.MergeSort; Zl.}J,0F
import org.rut.util.algorithm.support.QuickSort; uV*&a~
import org.rut.util.algorithm.support.SelectionSort; e ?H`p"l
import org.rut.util.algorithm.support.ShellSort; ,y?0Iwf
q=E<y
/** W04-D
* @author treeroot '8wA+N6Zr7
* @since 2006-2-2 [*#ms=Zdc
* @version 1.0 ; eq^m,oz
*/ ;Zc(qA
public class SortUtil { icHc!m?
public final static int INSERT = 1; &B7X LO[
public final static int BUBBLE = 2; pVPCxP
public final static int SELECTION = 3; }0|,*BkI m
public final static int SHELL = 4; pl V]hu27K
public final static int QUICK = 5; $ T.c>13
public final static int IMPROVED_QUICK = 6; $v+Q~\'
public final static int MERGE = 7; {KE858
public final static int IMPROVED_MERGE = 8; =x9zy]
public final static int HEAP = 9; ,)nO
9=~"^dp54%
public static void sort(int[] data) { -D0kp~AO4N
sort(data, IMPROVED_QUICK); c63DuHA*C
} x\GCsVy
private static String[] name={ [L"(flY(E
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" a&p|>,WS
}; TP[<u-@G
vz*QzVk1
private static Sort[] impl=new Sort[]{ pog*}@OS
new InsertSort(), {?17Zth
new BubbleSort(), m49GCo k+
new SelectionSort(), kb]PWOz
new ShellSort(), ,[%KSyH
new QuickSort(), Tz]t.]!&E
new ImprovedQuickSort(), >Q#_<IcI
new MergeSort(), *f=H#
new ImprovedMergeSort(), =U!M,zw4
new HeapSort() +HQX]t:Y
}; p@y?xZS
fa;\4#
public static String toString(int algorithm){ K 38e,O
return name[algorithm-1]; htj:Z:C`
} (4LXoNT
\L-o>O
public static void sort(int[] data, int algorithm) { ,8nu%zcVn
impl[algorithm-1].sort(data); +Fp8cT=1
} $a>,sL&;
1WRQjT=o
public static interface Sort { R$IxR=hMx
public void sort(int[] data); bf|s=,D
} $DeHo"mg7m
lO! Yl:;m%
public static void swap(int[] data, int i, int j) { 85+'9#~!
int temp = data; gE]6]L
data = data[j]; $8vZiB!"
data[j] = temp; Kur3Gf X
} DJvmwFx
} mN?y\GB