[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; pk(<],0]X
} R7Hn8;..
int i1=l; A$fd6+{
int i2=mid+1; p;BdzV>
for(int cur=l;cur<=r;cur++){ d/Fjs0pt
if(i1==mid+1) 6"eGd"
data[cur]=temp[i2++]; KdYT5VUM/
else if(i2>r) t3v*P6
data[cur]=temp[i1++]; w0tlF:Eg
else if(temp[i1] data[cur]=temp[i1++]; a5z.c_7r
else rm(<?w%'?
data[cur]=temp[i2++]; Rm)vY}v
} u\&oiwSIP
} XC0G5rtB
q.~.1 '`!
} H>;km$b +
a%Cq?HZ7
改进后的归并排序: }B^s!y&b
E)H8jBm6w
package org.rut.util.algorithm.support; fZxZ):7i
RAXqRP,iw
import org.rut.util.algorithm.SortUtil; tNmH*"wR<
aSXoYG0\
/** f1hi\p0q
* @author treeroot OQW#BBet@
* @since 2006-2-2 .l !:|Fd
* @version 1.0 /Eh\07p
*/ {foF[M
public class ImprovedMergeSort implements SortUtil.Sort { :[|`&_D9J
;oWhTj`
private static final int THRESHOLD = 10; 8X5;)h
|C7GI[P
/* pk: ruf`)
* (non-Javadoc) ZCbxL.fFz
* cJj0`@0f
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ' OdZ[AN
*/ g%1!YvS3v
public void sort(int[] data) { i "62+
int[] temp=new int[data.length]; b(;"p-^
mergeSort(data,temp,0,data.length-1); P}DrUND
} ,'={/)c<
A<y3Tc?Q
private void mergeSort(int[] data, int[] temp, int l, int r) { 3f eI
int i, j, k; qSkt }F%'
int mid = (l + r) / 2; UFouIS#L
if (l == r) "MM7qV
return; }@!d(U*
if ((mid - l) >= THRESHOLD) A{y3yH`#h
mergeSort(data, temp, l, mid); "*kWM
else |K aXek
insertSort(data, l, mid - l + 1); cS4e}\q,
if ((r - mid) > THRESHOLD) @T?:[nPf&F
mergeSort(data, temp, mid + 1, r); )1~4Tl,S
else im*QaO%a4
insertSort(data, mid + 1, r - mid); $J=9$.4"
2=(=Wjk.
for (i = l; i <= mid; i++) { q,QMvUK:
temp = data; <LzN/I aJ
} Fl(+c0|kT
for (j = 1; j <= r - mid; j++) { e>uV8!u
temp[r - j + 1] = data[j + mid]; +_ K7x5g
} @>(l}5U5
int a = temp[l]; PrDvRWM
int b = temp[r]; @D[;$YEk
for (i = l, j = r, k = l; k <= r; k++) { _d A-{
if (a < b) { kx]f`b
data[k] = temp[i++]; =QRLKo#_
a = temp; 0O!%NL[,
} else { \1aj!)
data[k] = temp[j--]; p9oru0q
b = temp[j]; qGl+KI
} GB^Ch YOb
} lv&<kYWY
} YpL{c*M
0-l @U{
/** _BHb0zeot
* @param data >6r&VZu*n
* @param l 5W 5\*L
* @param i fVb&=%e
*/ g9GE0DbT`
private void insertSort(int[] data, int start, int len) { ~Jmn?9 3
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); I&Yu=v/_
} 3::DURkjf
} w/h?, L|
} } Yjic4?
} xJ^Gtq Um
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堆排序： Fg5>CppH
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package org.rut.util.algorithm.support; )q&uvfQ1(
?Xh=rx_
import org.rut.util.algorithm.SortUtil; p`33`25
S7E:&E&
/** b==<7[8
* @author treeroot $LFzpg
* @since 2006-2-2 NnrX64|0
* @version 1.0 kTc'k
*/ n8iejdA'
public class HeapSort implements SortUtil.Sort{ *oZBv4Vh
_d %H;<_
/* (non-Javadoc) lwQI 9U[O2
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 5a5I+* c
*/ 2+sNt6B2
public void sort(int[] data) { wKXKc\r
MaxHeap h=new MaxHeap(); KosAc'/ M
h.init(data); vT\`0di~
for(int i=0;i h.remove(); ;w}ZI<ou
System.arraycopy(h.queue,1,data,0,data.length); K}&|lCsb
} gqyQ Zew
%I&Hx<Hj
private static class MaxHeap{ 0)yvyQ5
VISNmz2P
void init(int[] data){ ;IXDZ#;
this.queue=new int[data.length+1]; xwTN\7f>
for(int i=0;i queue[++size]=data; I$9t^82j
fixUp(size); vZhN% DfY
} nFX8:fZ$>
} \iSaxwU_
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private int size=0; h&NcN-["
wrac\.
private int[] queue; UT==x<
WnvuB.(@3
public int get() { efl6U/'Ij
return queue[1]; pWO,yxr:
} o*'J8El\y^
l?pZdAE
public void remove() { ,DXNq`24
SortUtil.swap(queue,1,size--); &>*fJ
fixDown(1); wu/]M~XwI
} |9~{&<^X
file://fixdown F1w~f <
private void fixDown(int k) { UccnQZ7/I
int j; q 1Rk'k4+
while ((j = k << 1) <= size) { &r/a\t,8n
if (j < size %26amp;%26amp; queue[j] j++; m9wV#Ldu
if (queue[k]>queue[j]) file://不用交换 4WzB=C(f
break; {%N*AxkvId
SortUtil.swap(queue,j,k); A_CEpG]
k = j; f|1y?w?I
} FC.y%P,
} do+HPnfDzU
private void fixUp(int k) { FxTOc@<
while (k > 1) { VkRvmKYl
int j = k >> 1; _;G"{e.=
if (queue[j]>queue[k]) R`:Y&)c_$
break; iNT1lk
SortUtil.swap(queue,j,k); q/XZb@rt
k = j; Me`jh8(K\6
} g(;t,Vy,I
} Q/1 6D
y4C_G?
} J2v=b?NE
dSS_^E[{
} ?Q]&d!UCs
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SortUtil： U*(m'Ea
f)({;,q
package org.rut.util.algorithm; 6HCP1`gg
T]Vh]|_s
import org.rut.util.algorithm.support.BubbleSort; )^|zuYzN
import org.rut.util.algorithm.support.HeapSort; TMhUo#`I|
import org.rut.util.algorithm.support.ImprovedMergeSort; pV=X
import org.rut.util.algorithm.support.ImprovedQuickSort; Y@Lv>p
import org.rut.util.algorithm.support.InsertSort; <ij;^ygYD
import org.rut.util.algorithm.support.MergeSort; WW:@%cQ@
import org.rut.util.algorithm.support.QuickSort; ']Nw{}eS`
import org.rut.util.algorithm.support.SelectionSort; TlYeYN5V
import org.rut.util.algorithm.support.ShellSort; S_y!4;]ox
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/** >Yl?i&3n
* @author treeroot Y`uL4)hR5
* @since 2006-2-2 {-PD3 [f"
* @version 1.0 G)?VC^Q
*/ qq]ZkT}
public class SortUtil { _ncqd,&z
public final static int INSERT = 1; _SJ#k|vcq
public final static int BUBBLE = 2; exiCy1[+
public final static int SELECTION = 3; aW$sd)
public final static int SHELL = 4; _bHmcK
public final static int QUICK = 5; ]uI#4t~
public final static int IMPROVED_QUICK = 6; q=M!YWz
public final static int MERGE = 7; Hq?-e?Nc
public final static int IMPROVED_MERGE = 8; ]S[M]-I
public final static int HEAP = 9; O3bo3Cm$
k#_B^J&d
public static void sort(int[] data) { @SF*Kvb&
sort(data, IMPROVED_QUICK); Psij*%I4
} ?lKFcm
private static String[] name={ )[|`-M~u
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" Smzy EMT
}; '2vZ%C$
ypM0}pdvTp
private static Sort[] impl=new Sort[]{ f wWI2"}
new InsertSort(), `PXSQf
new BubbleSort(), Ob$|IH8.
new SelectionSort(), ftw\oGrS
new ShellSort(), hF"yxucj$
new QuickSort(), D4g$x'
new ImprovedQuickSort(), CPWe (
new MergeSort(), ?B.>VnYZ/a
new ImprovedMergeSort(), =B@owx
new HeapSort() k_ 9gMO
}; +@ga
eGwrSF#a)
public static String toString(int algorithm){ 9^h0D}#@
return name[algorithm-1]; ZW{pO:-
} ^a#Vp
GD<xmuo
public static void sort(int[] data, int algorithm) { "q5Tw+KCfu
impl[algorithm-1].sort(data); ln-+=jk
} (%=[J/F/
u )cc
public static interface Sort { tn&~~G~#
public void sort(int[] data); 'B ocMjRA
} e~w-v"'
pbM~T(Y8
public static void swap(int[] data, int i, int j) { r9G}[#DO
int temp = data; uH7$/
data = data[j]; #!(OTeL
data[j] = temp; sDA&U9;
} @2ZE8O#I
} ejP273*ah