[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; u=%y
} o~= iy
int i1=l; g^jJ8k,7(
int i2=mid+1; ~]&B>q
for(int cur=l;cur<=r;cur++){ dsV ~|D6:
if(i1==mid+1) W+8^P( K
data[cur]=temp[i2++]; h6g:(3t6m
else if(i2>r) B~?c3:6
data[cur]=temp[i1++]; P@C c]Z
else if(temp[i1] data[cur]=temp[i1++]; `mrCu>7
else QO2Ut!Y
data[cur]=temp[i2++]; 0C]4~F x~
} o5P&JBX<
} 3Y`>6A=
zO%w_7w
} :<|Z.4}kJb
.:8[wI_f
改进后的归并排序: mH)OB?+lq
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package org.rut.util.algorithm.support; }wfI4?}j}
^p,3)$
import org.rut.util.algorithm.SortUtil; }t\ 10nQ
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/** gwiR/(1
* @author treeroot ?;^5ghY$
* @since 2006-2-2 iX{H,-C
* @version 1.0 bo1I&I
*/ .3@Ng
public class ImprovedMergeSort implements SortUtil.Sort { hfg O
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private static final int THRESHOLD = 10; yw'ezpO"
JA<~xo[Q9
/* as(*B-_n~
* (non-Javadoc) ailG./I+
* \n_3Bwd~
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) @ u+|=x];
*/ Y''6NGf
public void sort(int[] data) { a%E8(ms37y
int[] temp=new int[data.length]; OF8WDo`
mergeSort(data,temp,0,data.length-1); 12lEs3
} 4:U0f;Fs
frc{>u~t
private void mergeSort(int[] data, int[] temp, int l, int r) { 0R|K0XH#$
int i, j, k; Z(HZB
int mid = (l + r) / 2; D-pX<0-y
if (l == r) >! oF0R_<
return; :G}DAUFN
if ((mid - l) >= THRESHOLD) 4[1k\
mergeSort(data, temp, l, mid); '00J~j~
else #/+I*B*y
insertSort(data, l, mid - l + 1); y@3kU*-1
if ((r - mid) > THRESHOLD) c;wA
mergeSort(data, temp, mid + 1, r); MqdB\OW&
else -2 xE#r
insertSort(data, mid + 1, r - mid); &DLhb90
D#jX6
for (i = l; i <= mid; i++) { ?L\z}0#
temp = data; @Dj:4
} c4 5?St
for (j = 1; j <= r - mid; j++) { 4UD' %}>y
temp[r - j + 1] = data[j + mid]; fLNag~
} o8{<qn|
int a = temp[l]; W`x)=y]Z
int b = temp[r]; 1~@|eWr|
for (i = l, j = r, k = l; k <= r; k++) { )~}PgbZ^
if (a < b) { nLJBq)i
data[k] = temp[i++]; ~C|,b"
a = temp; E0YU[([G
} else { eu9w|g
data[k] = temp[j--]; X`1p'JD
b = temp[j]; Q>=-ext}q
} *H"aOT^{
} y9!:^kDI
} M"(6&M=?
sJ~P:g
/** c&*l"
* @param data hk} t:<
* @param l h$Tr sO
* @param i t77'fm
*/ Ea]T>4
private void insertSort(int[] data, int start, int len) { =/9<(Tt%m
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); -k{Jp/-D
} W-XpJ\_
} ffk4mhH
} zMGzReJ
} >vVw!.fJ
-:SIS`0s
堆排序： ;SY.WfVA7
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package org.rut.util.algorithm.support; c~+l-GIWm
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import org.rut.util.algorithm.SortUtil; O]{*(J/t
_|<BF
/** $<OhGk-
* @author treeroot s.:r;%a
* @since 2006-2-2 aZKXD! 4
* @version 1.0 z0Xa_w=
*/ m*oc)x7'
public class HeapSort implements SortUtil.Sort{ HO5d%85
a$m_D!b~_
/* (non-Javadoc) 9m8ee&,
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) tU:FX[&?R
*/ Qq3fZ=
public void sort(int[] data) { `6F+Rrn
MaxHeap h=new MaxHeap(); w$>3pQ8d
h.init(data); I4ilR$jg
for(int i=0;i h.remove(); YPszk5hn
System.arraycopy(h.queue,1,data,0,data.length); ezZph"&
} Ttv'k*$cP
O]qPmEj
private static class MaxHeap{ /9_#U#vhY
-H\,2FO
void init(int[] data){ O2v.
this.queue=new int[data.length+1]; 5pJ*1pfeo
for(int i=0;i queue[++size]=data; z-@-O
fixUp(size); J+Bdz6lt
} IN^_BKQt
} V@Wcb$mgk
A5XR3$5P
private int size=0; r1Z<:}ZwK
r)b<{u=]
private int[] queue; {?i)K X^
D{C:d\ e)$
public int get() { Y6ben7j%-
return queue[1]; wiE]z
} yd>}wHt
?/d!R]3
public void remove() { wL2XNdo}<
SortUtil.swap(queue,1,size--); D1Yh,P<CF\
fixDown(1); ;+`uER
} 1TRN~#ix
file://fixdown [/ohk&
private void fixDown(int k) { *48IF33&s
int j; SRCOs1(EK9
while ((j = k << 1) <= size) { %&<W(|U1<
if (j < size %26amp;%26amp; queue[j] j++; a)9rs\Is{
if (queue[k]>queue[j]) file://不用交换 16$y`~c-z
break; &p"(-
SortUtil.swap(queue,j,k); 3hS6jS
k = j; l h/&__
} M<[?g5=#
} I/B1qw;MN
private void fixUp(int k) { xK;e\^v
while (k > 1) { "^%Z'ou
int j = k >> 1; (p |DcA]BX
if (queue[j]>queue[k]) \L[i9m|e
break; o~C('1Fdb
SortUtil.swap(queue,j,k); G$5m$\K
k = j; ]W) jmw'mo
} \+Y!ILOI
} GDPo`#~
x~/+RF XF
} =Od>;|]m
tt4+m>/T
} #D)x}#V\
}.{}A(^YR
SortUtil： 9;KJr[FQV
j|K.i/
package org.rut.util.algorithm; &U&%ka<*
I]uhi{\C
import org.rut.util.algorithm.support.BubbleSort; @2e2^8X7f
import org.rut.util.algorithm.support.HeapSort; Pp_V5,i\
import org.rut.util.algorithm.support.ImprovedMergeSort; &1Fply7(Ay
import org.rut.util.algorithm.support.ImprovedQuickSort; l4ouZR
import org.rut.util.algorithm.support.InsertSort; 8#f$rs(}
import org.rut.util.algorithm.support.MergeSort; ax@H"d&
import org.rut.util.algorithm.support.QuickSort; 7co`Zw4}g
import org.rut.util.algorithm.support.SelectionSort; 4P kfUMX
import org.rut.util.algorithm.support.ShellSort; qtzRCA!9(Z
{L0;{
/** ^?"^Pmw
* @author treeroot ^M|K;jt>
* @since 2006-2-2 oJY[{-qW
* @version 1.0 #@Y/{[s|@
*/ _V@P-Ye
public class SortUtil { #WufZ18#
public final static int INSERT = 1; '6zd;l9Z
public final static int BUBBLE = 2; 2u:4$x8
public final static int SELECTION = 3; *gu8-7'
public final static int SHELL = 4; RJc%, ]:
public final static int QUICK = 5; X+ f9q0
public final static int IMPROVED_QUICK = 6; rsF:4G"%
public final static int MERGE = 7; JBcY!dy-d
public final static int IMPROVED_MERGE = 8; \6sQJq
public final static int HEAP = 9; 8$}OS-
Oif,|:
public static void sort(int[] data) { Vxh.<b6&'
sort(data, IMPROVED_QUICK); [Ox(.
} gfo}I2"
private static String[] name={ 'sU)|W(3U
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" &" h]y?Q
}; "mZ.V
s AE9<(g&@
private static Sort[] impl=new Sort[]{ )=H{5&e#u
new InsertSort(), S,vu]?-8
new BubbleSort(), kRot7-7I|
new SelectionSort(), +d39f-[
new ShellSort(), E $6ejGw-
new QuickSort(), F?4Sz#
new ImprovedQuickSort(), h<3p8eB
new MergeSort(), J22rv(
new ImprovedMergeSort(), '29WscU
new HeapSort() ;$!I&<)
}; +1@AGJU3
=A n`D
public static String toString(int algorithm){ NWKi ()nA%
return name[algorithm-1]; h%1Y6$
} +ld;k/
Hed$ytMaGz
public static void sort(int[] data, int algorithm) { OM!=ViN(=
impl[algorithm-1].sort(data); I;j3*lV_
} 5(J^N
o'Y#H r)/
public static interface Sort { A1_ J sS
public void sort(int[] data); PqEAqP
} oI@9}*
5"=:#zN
public static void swap(int[] data, int i, int j) { E`xU m9F
int temp = data; r_2btpL^
data = data[j]; Y'N'hRD
data[j] = temp; {;k_!v{
} (cs~@
} K`4GU[ul