[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; hSkI]%
} M9~eDw'Pr
int i1=l; py|ORVN(Z
int i2=mid+1; |)5xmN]
for(int cur=l;cur<=r;cur++){ Y["aw&;#O\
if(i1==mid+1) iEx sGn]2
data[cur]=temp[i2++]; 3bK.8
else if(i2>r) ?58,Ja
data[cur]=temp[i1++]; 4e`GMtp
else if(temp[i1] data[cur]=temp[i1++]; 9N[(f-`
else meF.`fh
data[cur]=temp[i2++]; |-)2 D=P
} J^w!?nk
} qQN|\u+co
EN2H[i+,
} U3t$h
^WF/gup\hS
改进后的归并排序: {u}d`%_.M
f[ 'uka.U
package org.rut.util.algorithm.support; KT3n-Y-,
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import org.rut.util.algorithm.SortUtil; e'l@M$^
|YnT;q
/** [z[<onFIq
* @author treeroot UG !+&ii|
* @since 2006-2-2 L#|6Lnp^
* @version 1.0 j1~'[
*/ Ht,+KbB
public class ImprovedMergeSort implements SortUtil.Sort { ).$q9G
bC h
private static final int THRESHOLD = 10; w<|Qezi3 w
zn)Kl%N^
/* ^yFtL(x,
* (non-Javadoc) OD8{ /7
* $S'~UbmYU
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) w,x'FZD
*/ #d*)W3e2{
public void sort(int[] data) { HU1ZQkf
int[] temp=new int[data.length]; &;2@*#,
mergeSort(data,temp,0,data.length-1); $8{v_2C){
} d:!A`sk7
1yd}F`{8UF
private void mergeSort(int[] data, int[] temp, int l, int r) { @b3jO
int i, j, k; NpAZuISD!
int mid = (l + r) / 2; zDohp 5,
if (l == r) H"vkp~u]I
return; !mIr_d2"
if ((mid - l) >= THRESHOLD) p0sq{d~
mergeSort(data, temp, l, mid); Oe)B.{;Ph
else vp4NH]fJ
insertSort(data, l, mid - l + 1); +i@{h9"6g
if ((r - mid) > THRESHOLD) _q z^|J
mergeSort(data, temp, mid + 1, r); *LOUf7`
else 6d{&1-@>
insertSort(data, mid + 1, r - mid); RlUX][)
!XQq*
for (i = l; i <= mid; i++) { U'p-Ko#
temp = data; [BZA1,
} chakp!S=
for (j = 1; j <= r - mid; j++) { |w+N(wcJ
temp[r - j + 1] = data[j + mid]; (RU\a]Ry
} | IB4-p
int a = temp[l]; k1E(SXcW9
int b = temp[r]; R5& R~1N
for (i = l, j = r, k = l; k <= r; k++) { |))O3]-
if (a < b) { 9D[Jn}E:
data[k] = temp[i++]; o"j$*o=
a = temp; E+z"m|G
} else { /C
data[k] = temp[j--]; @(W{_mw
b = temp[j]; n^iq?u
} wCgi@\
} zff<#yK1
} qAW?\*n5N
^`?M~e2FZ8
/** Xkp?)x3~X
* @param data (sqI:a
* @param l /i)>|U 4
* @param i 2y5d
*/ p6X-P%s
private void insertSort(int[] data, int start, int len) { <7 xX/Z}M
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); g\]~H%2 ,
} VRB!u420
} %R^*MUTx
} <O0.q.
} ]Ns)fr6
fM`.v+
堆排序： u';9zk/$
%%sJ+)
package org.rut.util.algorithm.support; .$]-::&
n7/>+V+
import org.rut.util.algorithm.SortUtil; x|$|~6f=n
8/k"A-m
/** SS6K7
* @author treeroot hsHbT^Qm
* @since 2006-2-2 TPVB{ 107
* @version 1.0 IictX"3lh
*/ /B<QYvv
public class HeapSort implements SortUtil.Sort{ l[<U UEjZJ
$wC'qV *
/* (non-Javadoc) oA?EJ~%
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) _<KUa\
*/ GfV#^qi
public void sort(int[] data) { .(99f#2M:
MaxHeap h=new MaxHeap(); qTSe_Re
h.init(data); s:3b.*t<
for(int i=0;i h.remove(); >f'aW
System.arraycopy(h.queue,1,data,0,data.length); <HnpI
} wJC F"e
DTlId~Dyq
private static class MaxHeap{ qrf90F)
ey6ujV7!
void init(int[] data){ ~@DdN5
this.queue=new int[data.length+1]; V8Ri2&|3
for(int i=0;i queue[++size]=data; ^J;rW3#N8
fixUp(size); qOy0QZ#0
} L2=:Nac
} 0xY</S
Cu!]-c{
private int size=0; m%=*3gH]&
p|?FA@ 3
private int[] queue; mVFo2^%v
I1Otu~%d
public int get() { *`8JJs0g
return queue[1]; jweX"G54R
} T.jCF~%7F
eC94rcb}i{
public void remove() { C57m{RH
SortUtil.swap(queue,1,size--); u-_1)'
fixDown(1); .)SR3?
} 9VanR ::XX
file://fixdown yO}5.
private void fixDown(int k) { QYi4A"$`
int j; tcO{CI
while ((j = k << 1) <= size) { +H28F_#
if (j < size %26amp;%26amp; queue[j] j++; B%tWi
if (queue[k]>queue[j]) file://不用交换 2WTOu x*
break; ({Pjz;xM
SortUtil.swap(queue,j,k); a9UXg<4
k = j; VZq~ -$
} tJ 2GSZ`
} N/ f7"~+`
private void fixUp(int k) { *\(z"B
while (k > 1) { \H~zN]3^
int j = k >> 1; !sSq4K
if (queue[j]>queue[k]) z:@:B:E
break; mBE&>}G<
SortUtil.swap(queue,j,k); 7YR|6{@
k = j; zh|9\lf
} Xjkg7p,HD@
} xDGS`o_w_
iaCV8`&q%
} #c5jCy}n
Pc_aEBq
} :aK?DtZ
FY ms]bv
SortUtil： 8AX_y3$
0/b _T
package org.rut.util.algorithm; 2ozh!8aL
fT|A^
import org.rut.util.algorithm.support.BubbleSort; xC,x_:R`
import org.rut.util.algorithm.support.HeapSort; xbm%+
import org.rut.util.algorithm.support.ImprovedMergeSort; X!p`|i
import org.rut.util.algorithm.support.ImprovedQuickSort; %/"n(?$W
import org.rut.util.algorithm.support.InsertSort; |Ha#2pt{bc
import org.rut.util.algorithm.support.MergeSort; S0)JIrrHC
import org.rut.util.algorithm.support.QuickSort; Q-n8~Ey1a
import org.rut.util.algorithm.support.SelectionSort; mAtqF %V
import org.rut.util.algorithm.support.ShellSort; })H d]a
BG+ityH
/** d=PX}o^
* @author treeroot jYFJk&c
* @since 2006-2-2 E4L?4>V@\
* @version 1.0 WJ25fTsG
*/ motK}G
public class SortUtil { _cX}!d!j
public final static int INSERT = 1; MLu!8dgI
public final static int BUBBLE = 2; G aV&y
public final static int SELECTION = 3; ZpV]X(Px(o
public final static int SHELL = 4; FfdB%
public final static int QUICK = 5; lPZ(c%P
public final static int IMPROVED_QUICK = 6; <X:JMj+
public final static int MERGE = 7; Lwr's'ao.
public final static int IMPROVED_MERGE = 8; LE\=Y;%
public final static int HEAP = 9; a%T`c/C
@up,5`
public static void sort(int[] data) { D%p*G5Bg3
sort(data, IMPROVED_QUICK); r3l1I}
} L"qJZU
private static String[] name={ Io1j%T#ZT
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" )l7XZ_gw'
}; YYv0cV{E
H<(F$7Q!\
private static Sort[] impl=new Sort[]{ j uA@"SG
new InsertSort(), tk&AZb,sP
new BubbleSort(), +/~]fI
new SelectionSort(), a!9'yc
new ShellSort(), N1a]y/
new QuickSort(), wJy]Vyd
new ImprovedQuickSort(), HwUaaK
new MergeSort(), Mg;pNK\n
new ImprovedMergeSort(), i]v3CY|3AI
new HeapSort() ~"#0rPT
}; IT| h;NUG
';tlV u
public static String toString(int algorithm){ qGk.7wf%
return name[algorithm-1]; @dWA1tM
} :_8K8Sa
y, l[v39
public static void sort(int[] data, int algorithm) { j&8YE7
impl[algorithm-1].sort(data); (a[BvJf
} ZISIW!
'Z{`P0/^o`
public static interface Sort { *k{Llq
public void sort(int[] data); h4hAzFQ.s
} !j6k]BgZ
X-\$<DiJGv
public static void swap(int[] data, int i, int j) { {7:1F)Pj
int temp = data; $--8%gh dG
data = data[j]; :Awwt0
data[j] = temp; [k7(t|Q{
} *~PB
} '.v;/[0