[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; vx}BTH
} 7;pQ'FmZJ
int i1=l; bRr3:"=sE
int i2=mid+1; @gw8r[
for(int cur=l;cur<=r;cur++){ I__a}|T%
if(i1==mid+1) M C y~~DL
data[cur]=temp[i2++]; e%IbME]x
else if(i2>r) jsP+,brO
data[cur]=temp[i1++]; m^w{:\p
else if(temp[i1] data[cur]=temp[i1++]; w:mm@8N
else hoLA*v2<
data[cur]=temp[i2++]; 3PlIn0+LX
} ?%n"{k?#
} R*2F)e\|
R\]C;@J<
} \9`.jB~<
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改进后的归并排序: JEF;Q
x~K79Mya
package org.rut.util.algorithm.support; #7KR`H
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import org.rut.util.algorithm.SortUtil; D ,[yx='
+=sw&DH
/** I+31:#d
* @author treeroot 7m}fVLk
* @since 2006-2-2 "]OROJGa
* @version 1.0 9TwKd0AT$&
*/ M`E}1WNQ?]
public class ImprovedMergeSort implements SortUtil.Sort { 5Vai0Qfcu:
Qj$w7*U
private static final int THRESHOLD = 10; 0E)M6 jJ
nj1PR`AE
/* ,H1K sN
* (non-Javadoc) (6b0rqPF
* ~YByyJG
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) p|@#IoA/e
*/ N|3#pHm@
public void sort(int[] data) { }$ Kd-cj+
int[] temp=new int[data.length]; kI2+&
mergeSort(data,temp,0,data.length-1); Ejnk\8:
} '8(UiB5d
e3?z^AUXm
private void mergeSort(int[] data, int[] temp, int l, int r) { wuM'M<J@
int i, j, k; RE4WD9n
int mid = (l + r) / 2; qh6rMqq
if (l == r) NK'@.=$
return; Sh?eb
if ((mid - l) >= THRESHOLD) k|{ 4"4r
mergeSort(data, temp, l, mid); /_YTOSZjm
else 1U?5/Ja
insertSort(data, l, mid - l + 1); dGz4`1(>
if ((r - mid) > THRESHOLD) ]wi0qc2{
mergeSort(data, temp, mid + 1, r); 4Z5;y[k(
else ]&dPY[~,/i
insertSort(data, mid + 1, r - mid); ;>S|?M4GZ
(/s~L*gF{
for (i = l; i <= mid; i++) { be$']}cP
temp = data; 9A/bA|$
} &I%E8E
for (j = 1; j <= r - mid; j++) { }D.\2x(J
temp[r - j + 1] = data[j + mid]; X5)(,036
} SpYmgL?wJ
int a = temp[l]; FZIC|uz
int b = temp[r]; i%, 't
for (i = l, j = r, k = l; k <= r; k++) { xLfv:Rp
if (a < b) { b*/Mco 9O
data[k] = temp[i++]; #=;vg
a = temp; /Gn0|]KI
} else { DIJmISk
data[k] = temp[j--]; )dh`aQ%N "
b = temp[j]; B<HN$/
} L&~'SC
} %wI)uJ2
} _pDfPLlY&
u?H.Z
/** 67 ~pn
* @param data xA`j:zn'j
* @param l FCWk8/
* @param i yqVoedN
*/ ),[@NK&=
private void insertSort(int[] data, int start, int len) { `xx3JQv[
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 5&O%0`t
} Y=g]\%-PB
} /7fd"U$Lh
} '@Yp@ _
} zqBzataR:
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堆排序： =Y5m% ,Bq
-GM"gkz
package org.rut.util.algorithm.support; u[oV Jvc
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import org.rut.util.algorithm.SortUtil; ~*9Ue@
hJD3G |E
/** o)]O
* @author treeroot _:WNk(
* @since 2006-2-2 x+;y0`oL
* @version 1.0 scYqU7$%T
*/ 8R:Glif
public class HeapSort implements SortUtil.Sort{ O0s!3hKu
yn_.
/* (non-Javadoc) j>uu3ADd2
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) M_>kefr
*/ >/lB%<$/
public void sort(int[] data) { 8FZC0j.^DH
MaxHeap h=new MaxHeap(); s@{~8cHgU
h.init(data); .N@+Ms3
for(int i=0;i h.remove(); /y6f~F
System.arraycopy(h.queue,1,data,0,data.length); k7;i^$@c
} /wl]kGF
PxGw5:
private static class MaxHeap{ >(wQx05^D
VJFFH\!`
void init(int[] data){ r| )45@
this.queue=new int[data.length+1]; +8x_f0<
for(int i=0;i queue[++size]=data; DvB{N`COd
fixUp(size); '$EyVu!
} SMJRoK3
} Jj5VBI!Ok
S~E@A.7
private int size=0; { 0&l*@c&
<VutwtA
private int[] queue; s{8=Q0^
ZoSyc--Bv
public int get() { :FfEjNil
return queue[1]; f}p`<z
} 4d}=g]P
/fQ}Ls\
public void remove() { ".waCt6
SortUtil.swap(queue,1,size--); +^&i(7a[?
fixDown(1); kS=nH9
} dUt4] ar
file://fixdown ]!@=2kG4
private void fixDown(int k) { RA[%8Rh)
int j; 12m-$/5n+
while ((j = k << 1) <= size) { X!mJUDzh]
if (j < size %26amp;%26amp; queue[j] j++; u[Si=)`VPk
if (queue[k]>queue[j]) file://不用交换 5]upfC6
break; ~zG)<S"q
SortUtil.swap(queue,j,k); nE*S3
k = j; p<#aXsjy
} lX)AbK]nb
} k?TZY|_
private void fixUp(int k) { Y6Cm PxOQ
while (k > 1) { oP%5ymL%J
int j = k >> 1; TI/RJF b
if (queue[j]>queue[k]) &vt)7[
break; HGh -rEh
SortUtil.swap(queue,j,k); H{,1-&>|
k = j; )S 4RR2Q>
} :z&kbG
} }+G5i_a
~{yy{
} 80'@+AD
X0-PJ-\aD@
} xkiiQs)
}^$1<GT
SortUtil： *Egg*2P;"Q
L8!yP.3
package org.rut.util.algorithm; 1"75+Q>D
W=w]`'
import org.rut.util.algorithm.support.BubbleSort; kGo2R]Dd[
import org.rut.util.algorithm.support.HeapSort; PREGQ0
import org.rut.util.algorithm.support.ImprovedMergeSort; dE_"|,:
import org.rut.util.algorithm.support.ImprovedQuickSort; )h&@}#A09
import org.rut.util.algorithm.support.InsertSort; doHE]gC2Uz
import org.rut.util.algorithm.support.MergeSort; vmrs(k "d#
import org.rut.util.algorithm.support.QuickSort; {*TB }Xsr,
import org.rut.util.algorithm.support.SelectionSort; -m=A1~|7
import org.rut.util.algorithm.support.ShellSort; yiI oqvP
{wj%WSQj/y
/** B["+7\c<~
* @author treeroot strM3j##x
* @since 2006-2-2 fCF.P"{W"
* @version 1.0 X&LJ"ahK
*/ W;2J~V!c
public class SortUtil { Sw,*#98
public final static int INSERT = 1; 58HA*w
public final static int BUBBLE = 2; GD]epr%V
public final static int SELECTION = 3; ;-@: }/
public final static int SHELL = 4; fpf,gb8[$n
public final static int QUICK = 5; 5QuRwu_
public final static int IMPROVED_QUICK = 6; f$kbb6juL
public final static int MERGE = 7; G'#u!<(^h
public final static int IMPROVED_MERGE = 8; fRLA;1va
public final static int HEAP = 9; +hr|$
l!Xj UnRF
public static void sort(int[] data) { Ky,upU
sort(data, IMPROVED_QUICK); `PL}8ydZ
} ng9e)lU~*b
private static String[] name={ ]=%qm;
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" buN@O7\
}; 8b~
O65`KOPn
private static Sort[] impl=new Sort[]{ yq[/9PciA
new InsertSort(), 9RHDkK{5
new BubbleSort(), ^Cp2#d*
new SelectionSort(), N\B&|;-V
new ShellSort(), Xb>SA|6[|
new QuickSort(), H1B%}G*Ir-
new ImprovedQuickSort(), 0E!-G= v
new MergeSort(), `'<$N<!
new ImprovedMergeSort(), 5R~M@
new HeapSort() 5$'[R;r
}; 1G5AL2
G~(\N?2
public static String toString(int algorithm){ `x#S.b
return name[algorithm-1]; .24z+|j
} -V}xvSVg
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public static void sort(int[] data, int algorithm) { E z}1Xse
impl[algorithm-1].sort(data); f7\X3v2W}3
} X5VNj|IE
+~iiy;i(
public static interface Sort { ox&?`DO
public void sort(int[] data); eS@j? Y0y
} FI[BZZW
QY&c=bWAX"
public static void swap(int[] data, int i, int j) { @W/k}<07
int temp = data; p|A ?F0
data = data[j]; JN+7oh]u
data[j] = temp; Kmaz"6A
} l~o!(rpX
} [>54?4{|.