[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; ZVXPp-M
} H_?rbz}o
int i1=l; \HO)ss)"
int i2=mid+1; GxhE5f;
for(int cur=l;cur<=r;cur++){ v6 5C j2ec
if(i1==mid+1) 'J?{/O^
data[cur]=temp[i2++]; k-ZO/yPo
else if(i2>r) ,-6Oma -
data[cur]=temp[i1++]; >` s"C
else if(temp[i1] data[cur]=temp[i1++]; s&$?m[w
else _}5vO$kdO
data[cur]=temp[i2++]; =f~<*wQ
} aBC5?V*e%
} 4v_Ac;2m&
s~7a-J
} c4AJ`f.5
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改进后的归并排序: ]he~KO[j<
{ {\oC$
package org.rut.util.algorithm.support; $UzSPhv[
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import org.rut.util.algorithm.SortUtil; ZS.=GjK
%mQ&pk
/** as@8L|i*
* @author treeroot Ur+U#}
* @since 2006-2-2 Ae7FtJO
* @version 1.0 ]zYIblpde
*/ <,:{Q75
public class ImprovedMergeSort implements SortUtil.Sort { X(tx8~z
e(s0mbJE
private static final int THRESHOLD = 10; [l-o*@
N[cIr{XBGN
/* +mrLMbBiD
* (non-Javadoc) 6) i-S<(
* K9@.l~n
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) li[[AAWVm
*/ 9Y3"V3EZ
public void sort(int[] data) { '#c#.O
int[] temp=new int[data.length]; .'`aX 7{\
mergeSort(data,temp,0,data.length-1); u.yR oZ8/!
} i`+w.zJOH8
byI" ?
private void mergeSort(int[] data, int[] temp, int l, int r) { ;87PP7~
int i, j, k; dy+A$)gY<
int mid = (l + r) / 2; {]6-,/3UR
if (l == r) )Ra:s>
return; eQi^d/yi
if ((mid - l) >= THRESHOLD) 45 ^ Z5t
mergeSort(data, temp, l, mid); gs1yWnSv5
else A l;a~45
insertSort(data, l, mid - l + 1); R([zlw~B5
if ((r - mid) > THRESHOLD) /%cDX:7X
mergeSort(data, temp, mid + 1, r); *Hx*s_F
else rfonM~3?'
insertSort(data, mid + 1, r - mid); #H7 SLQr\
JLm3qIC
for (i = l; i <= mid; i++) { e\X[\ve
temp = data; /rpr_Xw}
} ^1){ @(
for (j = 1; j <= r - mid; j++) { 6 5zx<
temp[r - j + 1] = data[j + mid]; hr]+4!/
} Vja 4WK*
int a = temp[l]; waMV6w)<
int b = temp[r]; i1x4$}
for (i = l, j = r, k = l; k <= r; k++) { *w;?&)8%
if (a < b) { S }`f&
data[k] = temp[i++]; f2c<-}wR
a = temp; .QP`Qn6(P
} else { fBh"
data[k] = temp[j--]; X QLP|v;"
b = temp[j]; U LS>v
} B!mHO*g
} 3PkZXeH/
} fYuSfB+<
8Ze> hEG
/** c(1tOQk.
* @param data 7KiraKb|
* @param l N/F_,>E
* @param i R'Ue>k
*/ xp1/@Pw?
private void insertSort(int[] data, int start, int len) { KGDN)@D
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); (LsVd2AbR
} S$SCW<LuN
} /\Nc6Z/ L
} FV9{u[3m
} X[Iy6qt
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堆排序： gH7 +#/
\j!/l f)
package org.rut.util.algorithm.support; SOG(&)b
1 K}gX>F
import org.rut.util.algorithm.SortUtil; Zsapu1HoL\
lrc%GU):
/** k% \;$u=%
* @author treeroot :sw5@JdJ
* @since 2006-2-2 D?y-Y
* @version 1.0 '?$@hqQn
*/ &M5v EPR
public class HeapSort implements SortUtil.Sort{ GTB\95j]
}],l m
/* (non-Javadoc) &wU"6E
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) (!@gm)#h
*/ >3g`6d
public void sort(int[] data) { ]N}/L lq
MaxHeap h=new MaxHeap(); R<1%Gdz
h.init(data); \V'fB5
for(int i=0;i h.remove(); .feB VRg
System.arraycopy(h.queue,1,data,0,data.length); ;m] nl_vg
} W2h*t"5W
78]*Jx>L
private static class MaxHeap{ PO5,lcBD<
#O_%!7M{4
void init(int[] data){ M5RN Z%
this.queue=new int[data.length+1]; M p<r`PM2
for(int i=0;i queue[++size]=data; ta.Lq8/
fixUp(size); KiG19R$
} CV HKP[-
} %wl:>9]
v9J1Hha#
private int size=0; w!*ZS~v/r
m~;.kc
private int[] queue; U$DZht4>u
>lmqPuf
public int get() { aVHID{Gf Z
return queue[1]; +uF}mZS^
} B!<B7Q
|{|B70v3Co
public void remove() { R7b-/ !L
SortUtil.swap(queue,1,size--); OE[7fDe'
fixDown(1); 5X3JQ"z
} tHaHBx1P
file://fixdown bkR~>F]FAu
private void fixDown(int k) { 0-OKbw5%=b
int j; CC@U'9]bH
while ((j = k << 1) <= size) { &b~X&{3,
if (j < size %26amp;%26amp; queue[j] j++; cb'Ya_
if (queue[k]>queue[j]) file://不用交换 s8:epcL`A
break; Msvs98LvW
SortUtil.swap(queue,j,k); ai/]E6r
k = j; i+QVs_jW
} 'N6oXE
} 7gLk~*
private void fixUp(int k) { vC&0UNe$
while (k > 1) { 1r4NP
int j = k >> 1; **-rPonM[
if (queue[j]>queue[k]) UazK0{t<f
break; RJ3uu NK7
SortUtil.swap(queue,j,k); 8|= c3Z
k = j; =KO]w9+\
} @fA|y
} `B&E?x
[A,!3BN
} /qKor;x
VPYcA>-%u
} gCYe^KJ
|H8C4^1Rq
SortUtil： Uun0FCA>
(MqQ3ys
package org.rut.util.algorithm; /xSJljexz
Q7`)&^ Hx
import org.rut.util.algorithm.support.BubbleSort; @)MG&X
import org.rut.util.algorithm.support.HeapSort; jB9~'>JY
import org.rut.util.algorithm.support.ImprovedMergeSort; &B:L9^
import org.rut.util.algorithm.support.ImprovedQuickSort; LdOqV'&r
import org.rut.util.algorithm.support.InsertSort; \N0wf-qa=
import org.rut.util.algorithm.support.MergeSort; 3bd`q $
import org.rut.util.algorithm.support.QuickSort; w&}<b%l
import org.rut.util.algorithm.support.SelectionSort; vx6lud0k}
import org.rut.util.algorithm.support.ShellSort; nIlx?(=pu
eo;MFd%;
/** AD!w:jT9
* @author treeroot f"\klfrRI_
* @since 2006-2-2 #v$wjqK5
* @version 1.0 }VWUcALJV
*/ X?ZLmP7|
public class SortUtil { 4uE)*1
public final static int INSERT = 1; :Eh}]_
public final static int BUBBLE = 2; GXLh(d!C
public final static int SELECTION = 3; uZf 6W<a
public final static int SHELL = 4; ~tL:r=
public final static int QUICK = 5; B<myt79F_[
public final static int IMPROVED_QUICK = 6; JSq3)o9?/
public final static int MERGE = 7; LO%e1y
public final static int IMPROVED_MERGE = 8; FwKY;^`!d
public final static int HEAP = 9; 9A{D<h}yk
n}9<7e~/
public static void sort(int[] data) { 8t< X
sort(data, IMPROVED_QUICK); ,[N(XstI
} Q|VBH5}1O
private static String[] name={ : maBec)
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" &&jQ4@m}j
}; 'lEIwJV$
2ER_?y
private static Sort[] impl=new Sort[]{ 37IHn6r\
new InsertSort(), $\k)Y(&
new BubbleSort(), S^i8VYK,C5
new SelectionSort(), K5<2jl3S
new ShellSort(), it>Bf;
new QuickSort(), B`nI]_
new ImprovedQuickSort(), qxyY2&
new MergeSort(), 3z#>1HD$
new ImprovedMergeSort(), ut]&3f''
new HeapSort() iBWEZw)
}; ME)='~E
W! |_ hL
public static String toString(int algorithm){ 7c%dSs6
return name[algorithm-1]; EHl~y=9
} 0.PG]K6
8Bc2?NI=
public static void sort(int[] data, int algorithm) { UH7?JF-D
impl[algorithm-1].sort(data); rHybP6C<
} xU{0rM"
dB&<P[$+8
public static interface Sort { 2A*,9S|Y
public void sort(int[] data); 4QPHT#eqX
} >#;_Ebl@
2w~Vb0
public static void swap(int[] data, int i, int j) { 8"LM:0x
int temp = data; [EVyCIcY,h
data = data[j]; C>-}BeY!
data[j] = temp; S,,Wb&A$
} J?E!\V&U
} ^%6f%]_