[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; !_/8!95
} y1jGf83
int i1=l; t"Vr;0!{
int i2=mid+1; 41+E UMc
for(int cur=l;cur<=r;cur++){ fSQ3 :o
if(i1==mid+1) <EMLiiNY
data[cur]=temp[i2++]; ?'8MI|*l%
else if(i2>r) aaa#/OWQZ
data[cur]=temp[i1++]; uN?O*h/(
else if(temp[i1] data[cur]=temp[i1++]; :Jsz"vCg&s
else VQW)qOR9
data[cur]=temp[i2++]; VdN+~+A:
} T\b";+!W
} si"mM>e
4'4s EjyA
} 'zD;:wT
w|UKMbRMU]
改进后的归并排序: Kt&$Si
1SJHX1CxX
package org.rut.util.algorithm.support; =LeVJGF
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import org.rut.util.algorithm.SortUtil; (qc!-Isd~[
DoPF/m}
/** I5<#SW\a?
* @author treeroot piM11W}|/
* @since 2006-2-2 p6k'Q
* @version 1.0 dxhjPS~^Q
*/ 1wNY}3
public class ImprovedMergeSort implements SortUtil.Sort { pl^"1Z=*
uD*s^
private static final int THRESHOLD = 10; rsIPI69qJ.
d_?Zr`:
/* N=?kEX O
* (non-Javadoc) '>lPq tdZ
* !6fpMo
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) =D"63fP1
*/ +\(ay"+ d
public void sort(int[] data) { s)'_{ A"h
int[] temp=new int[data.length]; `] dx%
mergeSort(data,temp,0,data.length-1); {p_vR/yN
} #o |&MV_j
a.*j8T
private void mergeSort(int[] data, int[] temp, int l, int r) { $}"Wta
int i, j, k; y2ws*IZ"
int mid = (l + r) / 2; QT&Ws+@ s{
if (l == r) ah$7 Oudj
return; 1#X=&N
if ((mid - l) >= THRESHOLD) ^1& LHrT
mergeSort(data, temp, l, mid); "jN-Yd,z
else `/j|Rb|eow
insertSort(data, l, mid - l + 1); `0WA!(W
if ((r - mid) > THRESHOLD) H2R^t{w
mergeSort(data, temp, mid + 1, r); ]GPz>k
else DP'Dg /D
insertSort(data, mid + 1, r - mid); r D!.N
*/dsMa
for (i = l; i <= mid; i++) { `]I5WTt*X
temp = data; N(/<qv
} 5Yibv6:3a
for (j = 1; j <= r - mid; j++) { KJ{F,fr+v
temp[r - j + 1] = data[j + mid]; 4JQ`&:?r
} ydFhw}1>
int a = temp[l]; 3f.Gog
int b = temp[r]; L-:L= snO
for (i = l, j = r, k = l; k <= r; k++) { tJF~Xv2L!
if (a < b) { GBOmVQ $Hb
data[k] = temp[i++]; G?1V~6
a = temp; ``)1`wx$
} else { yt#;3
data[k] = temp[j--]; NF.6(PG|
b = temp[j]; V+<AG*[
} nXaX=
} (<~R[sT|
} >oaEG5%d
L<>NL$CrN
/** NHVx!Kc
* @param data *RE-K36m|u
* @param l |DS@90}
* @param i F?AfB[PM
*/ l7y`$8Co
private void insertSort(int[] data, int start, int len) { )0V]G{QN
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 3S|;yOl#X
} Dj&bHC5%
} ?-&D'
} c5+lm}R?
} , p=8tf#
IMw)X0z
堆排序： %1+~(1P
N}<U[nh'
package org.rut.util.algorithm.support; .wOLi Ms
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import org.rut.util.algorithm.SortUtil; 'Mhdw}
tSLl'XeN
/** V>j`
* @author treeroot f9=X7"dzP
* @since 2006-2-2 )KQv4\0y<
* @version 1.0 uB"m!dL
*/ BU{V,|10a
public class HeapSort implements SortUtil.Sort{ kAQZj3P]
.-6s`C2 Y}
/* (non-Javadoc) ,$ret@.H
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) !PTbR4s
*/ (G!J==
public void sort(int[] data) { q x }fn/:
MaxHeap h=new MaxHeap(); 0c6AQP"=V
h.init(data); -t#a*?"$w
for(int i=0;i h.remove(); }ucg!i3C
System.arraycopy(h.queue,1,data,0,data.length); QHz76i!=>
} d"a7{~l
7%}}m&A7h
private static class MaxHeap{ uy\+#:44d
:2d9ZDyD
void init(int[] data){ MpvA--
this.queue=new int[data.length+1]; )%c)-c
for(int i=0;i queue[++size]=data; )O(Gw-jWE
fixUp(size); f^)nZ:~
} jM<Ihmh|
} 3`q`W9
?q&mI*j!
private int size=0; yKhzymS}T
;$;/#8`>
private int[] queue; ?bA]U:
f|E'eFrFk
public int get() { j"=jK^
return queue[1]; @C)h;TR
} ,gD i)]
E#]%e^
public void remove() { |mA*[?ye@
SortUtil.swap(queue,1,size--); mmK_xu~f28
fixDown(1); C(+BrIS*
} )$g/PQ
file://fixdown }'- )
private void fixDown(int k) { DZZt%n8J
int j; 5E|2S_)G
while ((j = k << 1) <= size) { 0~+k
if (j < size %26amp;%26amp; queue[j] j++; 'm:B(N@+
if (queue[k]>queue[j]) file://不用交换 =?aB@&
break; __npX_4%S
SortUtil.swap(queue,j,k); #O ]IXo(5z
k = j; aoX$,~oI5
} 4!|ar?Zy
} r&RSQHa)
private void fixUp(int k) { ^Y |s^N
while (k > 1) { =c4U%d2
int j = k >> 1; J6P Tkm}^
if (queue[j]>queue[k]) q;JQs:U!
break; u9(AT>HxT
SortUtil.swap(queue,j,k); C(hg"_W ou
k = j; + k:?;ZG
} ?Fv(4g
} Lo4t:H&
ks4 ,2f,2
} n4,J#h/
%9M49s
} x$I>e
MG>;|*$%
SortUtil： ,//=yW
=G6@:h=
package org.rut.util.algorithm; |7'W)s5.
M$9h)3(B
import org.rut.util.algorithm.support.BubbleSort; y0]O 6.{
import org.rut.util.algorithm.support.HeapSort; sqRuqUj+
import org.rut.util.algorithm.support.ImprovedMergeSort; G=e[TR)i
import org.rut.util.algorithm.support.ImprovedQuickSort; :8 :>CHa
import org.rut.util.algorithm.support.InsertSort; Nx'j+>bz>y
import org.rut.util.algorithm.support.MergeSort; K6oLSr+EAK
import org.rut.util.algorithm.support.QuickSort; Hy'&x?F6
import org.rut.util.algorithm.support.SelectionSort; (""&$BJQ|
import org.rut.util.algorithm.support.ShellSort; ^lj>v}4fkW
~ .-'pdz%
/** 0jH2.d=
* @author treeroot +>j_[O5Y
* @since 2006-2-2 uyIA]OtyN
* @version 1.0 ,88}5)b[
*/ s]UeDZ<a
public class SortUtil { P])O\<)J
public final static int INSERT = 1; K~R{q+
public final static int BUBBLE = 2; C/G[B?:h
public final static int SELECTION = 3; j/&7L@Y
public final static int SHELL = 4; 7dZ!GX?\y
public final static int QUICK = 5; Jjv&@a}
public final static int IMPROVED_QUICK = 6; 8wOPpdc
public final static int MERGE = 7; wC~Uy%
public final static int IMPROVED_MERGE = 8; 7 pV3#fQ
public final static int HEAP = 9; C.O-iBVe#
10(N|2'q
public static void sort(int[] data) { uQCS%|8C
sort(data, IMPROVED_QUICK); ]LjW,b"
} Re_.<_$
private static String[] name={ t|%ul6{gz
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" =UN:IzT
}; G].Z| Z9
]h6<o*
private static Sort[] impl=new Sort[]{ tEl_A"^e
new InsertSort(), }<p%PyM
new BubbleSort(), I]58;|J
new SelectionSort(), %Ok.XBS)
new ShellSort(), vHmn)d1pl
new QuickSort(), I6+5mv\
new ImprovedQuickSort(), "\ md
new MergeSort(), , {^g}d8
new ImprovedMergeSort(), %|Vq"MW,I
new HeapSort() 1ARIZ;H
}; ^Ue>T8
W;7cF8fu4
public static String toString(int algorithm){ a9%# J^!
return name[algorithm-1]; [/FIY!nC?
} BZ.H6r'Q
cVN|5Y
public static void sort(int[] data, int algorithm) { 7o3f5"z
impl[algorithm-1].sort(data); *"wsMO
} NeH^g0Q2,g
GI/o!0"_
public static interface Sort { 70@:!HI]
public void sort(int[] data); bA:abO
} SX#ATf6#
0t8-oui
public static void swap(int[] data, int i, int j) { [LE_lATjU
int temp = data; 3$_wAt4w
data = data[j]; Ktoxl+I?
data[j] = temp; L fhd02
} *:iFhKFU
} JdE=!~\8