[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; 3bH5C3(u
} cqg=8$RB
int i1=l; {(HxG4~
int i2=mid+1; 8*k oxS
for(int cur=l;cur<=r;cur++){ -c$z 2Q)
if(i1==mid+1) 92(~'5Qr
data[cur]=temp[i2++]; FrR9{YTA.
else if(i2>r) 0}-#b7eR
data[cur]=temp[i1++]; RdkU2Y}V
else if(temp[i1] data[cur]=temp[i1++]; S_T
else B/u*<k4
data[cur]=temp[i2++]; T+W3_xISX
} tMG@K
} JTkCk~bX[z
oQBiPN+v.3
} 1,u{&%yL"w
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改进后的归并排序: n`#+L~X
z\h,SX<U
package org.rut.util.algorithm.support; W%zmD Hk~
qj;l,Kua
import org.rut.util.algorithm.SortUtil; fB[\("+
1HXlHic
/** :xN8R^(
* @author treeroot ;Bnr='[
* @since 2006-2-2 Cji#?!Ra?
* @version 1.0 Rf8:+d[Jj|
*/ o~}1oN
public class ImprovedMergeSort implements SortUtil.Sort { b#}t:yy
?k w/S4
private static final int THRESHOLD = 10; bQ=s8'
YZ{jP?x
/* :>ZzP:QD
* (non-Javadoc) zK /f$}
* t!l/`e%J
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) <!hpfTz*
*/ hqWPf
public void sort(int[] data) { ]g7HEB.Y
int[] temp=new int[data.length]; P[1m0!,B
mergeSort(data,temp,0,data.length-1); 8+L7E-
} J2Y 3er
rN'.&;Y5
private void mergeSort(int[] data, int[] temp, int l, int r) { 8q{1E];:q
int i, j, k; -Cml0}.O
int mid = (l + r) / 2; V[To,f
if (l == r) ][rTQt m
return; e7hO;=?b'
if ((mid - l) >= THRESHOLD) F42TKPN^uu
mergeSort(data, temp, l, mid); v?%0~!
else be_C>v
insertSort(data, l, mid - l + 1); @?j@yRe
if ((r - mid) > THRESHOLD) )MMhlcNC
mergeSort(data, temp, mid + 1, r); <Q\H
else g!.Ut:8L9
insertSort(data, mid + 1, r - mid); sOjF?bCdO
SkriX\p
for (i = l; i <= mid; i++) { s?~8O|Mu'
temp = data; B5 tx f.
} /H.(d 4C
for (j = 1; j <= r - mid; j++) { \&# p1K(H
temp[r - j + 1] = data[j + mid]; {4o\S
} g8rp|MOH
int a = temp[l]; Kyyih|{
int b = temp[r]; 6S2r
for (i = l, j = r, k = l; k <= r; k++) { lJ("6aT?
if (a < b) { rS=tcBO
data[k] = temp[i++]; okVp\RC
a = temp; %zRiLcAT
} else { }=xI3;7
data[k] = temp[j--]; #%:`p9p.S
b = temp[j]; ?L8&(&1@VD
} zL6 \p)y
} !k%l+I3J[
} Gmqs`{tc
kf}F}Ad:%
/** A>J1B(up
* @param data Ny]'RS-
* @param l .Kg|f~InO
* @param i !~ BZHi6\
*/ 2Ti" s-
private void insertSort(int[] data, int start, int len) { 3"f)*w7d
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); <!$dp9y.
} 'MSEki67
} ze*&*csO
} RCoeJ|
} d.LOyO
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堆排序： :h^O{"au^
[vZfH!vLP
package org.rut.util.algorithm.support; YG-Z.{d5Z
9"[!EKW
import org.rut.util.algorithm.SortUtil; wxH(&CB-{
-B<O_*wOj
/** DN4fP-m-
* @author treeroot E~rs11
* @since 2006-2-2 :5$xh
* @version 1.0 )[e%wPu4e
*/ v; je<DT
public class HeapSort implements SortUtil.Sort{ y21)~
L7i}Ga!8
/* (non-Javadoc) 16a_GwfM
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) E\ K
*/ E`A<]dAoK
public void sort(int[] data) { L"Qh_+
MaxHeap h=new MaxHeap(); |LXrGyk^
h.init(data); Ufm(2`FQ
for(int i=0;i h.remove(); \[@Q}k[
System.arraycopy(h.queue,1,data,0,data.length); Y\+(rC27
} ({D}QEP
UY?i E=
private static class MaxHeap{ vgUhN_rK
(#!(Q) ]
void init(int[] data){ Pmqx ;
this.queue=new int[data.length+1]; <`oCz Q1
for(int i=0;i queue[++size]=data; +Q@/F~1@6@
fixUp(size); EX+={U|ua$
} x`};{oz;
} 'd|Q4RE+W
fcgDU *A%
private int size=0; @Fm{6^
i6meY$l
private int[] queue; N#<zEAB
O;"*_Xq(`
public int get() { ~rVKQ-+4&
return queue[1]; &4w\6IR
} #i`A4D
d,GtH)(s
public void remove() { [u`17hyX
SortUtil.swap(queue,1,size--); *F26}q
fixDown(1); .g6PrhzFbk
} Pg!;o= {M
file://fixdown n"^/UQ|#j
private void fixDown(int k) { h,!G7V
int j; h|(ZXCH
while ((j = k << 1) <= size) { 1YF+(fk
if (j < size %26amp;%26amp; queue[j] j++; ?.rH;:9To
if (queue[k]>queue[j]) file://不用交换 )OW(T^>_'I
break; C8bGae(
SortUtil.swap(queue,j,k); 0%GqCg
k = j; CjC'"+[w
} p=mCK@
} (>!]A6^L~
private void fixUp(int k) { BR&Qw'O%
while (k > 1) { jc%{a*n"vr
int j = k >> 1; :Y}Y&mA4
if (queue[j]>queue[k]) dy2_@/T7
break; I,CAFq
SortUtil.swap(queue,j,k); AF9[2AH=Y
k = j; Mp^OL7p^^
} #{)r*"%
} pJ2:` f<;
Z1)jRE2dl
} cuV8#: i
.-O@UQx.I
} 8%vh6$s6/
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SortUtil： okK/i
rm5T=fNJ
package org.rut.util.algorithm; T!^?d5uW#
Vid{6?7kh
import org.rut.util.algorithm.support.BubbleSort; tdw\Di#m
import org.rut.util.algorithm.support.HeapSort; .pB8=_e:
import org.rut.util.algorithm.support.ImprovedMergeSort; 4."o.:8x
import org.rut.util.algorithm.support.ImprovedQuickSort; bo~{<UT
import org.rut.util.algorithm.support.InsertSort; &6,Yjs:T m
import org.rut.util.algorithm.support.MergeSort; |dB1R%
import org.rut.util.algorithm.support.QuickSort; @dWS*@
import org.rut.util.algorithm.support.SelectionSort; /P?|4D}<
import org.rut.util.algorithm.support.ShellSort; tpNtoqg_$
&.+n L
/** s{1Deek=
* @author treeroot `PQ?8z|
* @since 2006-2-2 DJD]aI
* @version 1.0 V#-qKV
*/ 9QX~aX
public class SortUtil { )$l9xx[
public final static int INSERT = 1; z'\}/k+
public final static int BUBBLE = 2; pjKl)q
public final static int SELECTION = 3; [6&CloY3
public final static int SHELL = 4; OUIUgej
public final static int QUICK = 5; .@8m\
public final static int IMPROVED_QUICK = 6; %X0NHta~@
public final static int MERGE = 7; l~Ie#vak
public final static int IMPROVED_MERGE = 8; 9A*?E
public final static int HEAP = 9; <.AC=4@V
YjX!q]56
public static void sort(int[] data) { /]MB6E7&
sort(data, IMPROVED_QUICK); V. bH$@ej
} !UgUXN*
private static String[] name={ U&]p!DV&;
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" +LI*!(T|lm
}; 5E\<r/FeJ
Jm);|#y
private static Sort[] impl=new Sort[]{ 9znx1AsN
new InsertSort(), |=^#d\?]j
new BubbleSort(), *Sz{DE1U
new SelectionSort(), C<wj?!v,F[
new ShellSort(), \:q e3Q
new QuickSort(), JXSqtk=
new ImprovedQuickSort(), )v!lPpe8
new MergeSort(), zV_-rf
new ImprovedMergeSort(), QNa}M{5>h
new HeapSort() Ip7FD9 ^
}; ;}>g1&q
{!{7zM%u0C
public static String toString(int algorithm){ f,`}hFD
return name[algorithm-1]; bWQORjnd8
} eMm~7\ R
U$/Hp#~X
public static void sort(int[] data, int algorithm) { +2au ;^N
impl[algorithm-1].sort(data); z:i X]df
} AHMV@o`V
VM\Z<}C
public static interface Sort { LL$,<q%(P
public void sort(int[] data); PgG |7='
} [b k&Nd[
^ ]6 80h
public static void swap(int[] data, int i, int j) { ~&[P` Z$
int temp = data; n?P 5pJ
data = data[j]; $?/Xk%d+
data[j] = temp; @)2V"FE4i
} @R OY}CZ{/
} ev: !,}]w