[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; .^S78hr]n
} F\R}no5C
int i1=l; cOZ^huK
int i2=mid+1; J\+gd%
for(int cur=l;cur<=r;cur++){ $tHwJ!<$&
if(i1==mid+1) &U*J{OP|
data[cur]=temp[i2++]; !O6Is'%B
else if(i2>r) ls\E%d
data[cur]=temp[i1++]; 6a7iLQA
else if(temp[i1] data[cur]=temp[i1++]; {l&2Kd*
else %QgAilj,
data[cur]=temp[i2++]; bDS1'Ce
} ^(JHRH~=h
} .GN$H>')
"EYjY->
} >Ron+ oe
r)]CZ])
改进后的归并排序: u2BW]T]
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package org.rut.util.algorithm.support; Ti|++oC/&
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import org.rut.util.algorithm.SortUtil; w00\1'-Kz
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/** 64']F1p0
* @author treeroot !TL}~D:J
* @since 2006-2-2 K('lH-3wS
* @version 1.0 51opP8
*/ bM0[V5:jB
public class ImprovedMergeSort implements SortUtil.Sort { NND=Zxl
!K3cf]2UD
private static final int THRESHOLD = 10; (E}cA&{
*.]E+MYi*
/* >X,Ag
* (non-Javadoc) fEG3b#t N
* Gi2ad+QH-
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) H\+c'$
*/ >^f)|0dn)E
public void sort(int[] data) { .S'fM]_#
int[] temp=new int[data.length]; ]|t.wr3AU
mergeSort(data,temp,0,data.length-1); E:4P1,%01+
} s!/holu
if[o?6U4t
private void mergeSort(int[] data, int[] temp, int l, int r) { ho]!G498
int i, j, k; MupW=3.38
int mid = (l + r) / 2; C$td{tM
if (l == r) #!Cter2
return; #G+
if ((mid - l) >= THRESHOLD) -Bo~"q
mergeSort(data, temp, l, mid); hRa(<ZK
else #f3;}1(
insertSort(data, l, mid - l + 1); KCh
if ((r - mid) > THRESHOLD) Mev-M2A
mergeSort(data, temp, mid + 1, r); zt[4_;2Y
else *Iwk47J ;a
insertSort(data, mid + 1, r - mid); |] !o*7"4
mOgOHb2
for (i = l; i <= mid; i++) { q$?7 ~*M;x
temp = data; uz#PBV8Q
} q_]
for (j = 1; j <= r - mid; j++) { )ehB)X
temp[r - j + 1] = data[j + mid]; y+";
} Qyv'nx0=
int a = temp[l]; n;kciTD%wK
int b = temp[r]; {eswe
for (i = l, j = r, k = l; k <= r; k++) { :DMHezaU
if (a < b) { -RH4y 2
data[k] = temp[i++]; Z&]+A,
a = temp; s1Tl.p5
} else { ,|.*,
data[k] = temp[j--]; ~njbLUB
b = temp[j]; qHR^0&
} Cl9SPz
} RZ|HwYG
} 1t[;`iZ
fATA%eA8;
/** H6ky)kF&
* @param data HZDaV&)@
* @param l YQ@dl
* @param i \)otu\3/
*/ uRm_
private void insertSort(int[] data, int start, int len) { >'ksXA4b
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); Wj4^W<IO
} c+8>EU AW
} Oj"pj:fB
} !u53 3
} {\svV 0)~
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堆排序： Db#W/8 a8k
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package org.rut.util.algorithm.support; [+%d3+27
{1Ju}=69
import org.rut.util.algorithm.SortUtil; 1 ;\]D9i
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/** KUp
* @author treeroot T/GgF&i3
* @since 2006-2-2 \)^,PA3
* @version 1.0 ]_ejDN\>{V
*/ cuQ7kECV
public class HeapSort implements SortUtil.Sort{ 29a_ZU7e6
hJw |@V
/* (non-Javadoc) FQk_#BkK
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) g[EM]q,
*/ mq J0z4I}
public void sort(int[] data) { .'^6QST
MaxHeap h=new MaxHeap(); YPha9M$AgU
h.init(data); K0O-WJ
for(int i=0;i h.remove(); ]pOYVf *$
System.arraycopy(h.queue,1,data,0,data.length); C#U<k0R
} z^gQ\\,4
ka5#<J7<p
private static class MaxHeap{ 4|> rwQ~t
p^KlH=1n.6
void init(int[] data){ Rwc[:6;fn
this.queue=new int[data.length+1]; I&TTr7
for(int i=0;i queue[++size]=data; JrCf,?L^
fixUp(size); a^*cZ?Ta
} <XQN;{xSa
} AI1@-
:DtZ8$I`]C
private int size=0; UF&0&`@
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private int[] queue; r6d0x
MzEm*`<
public int get() { HGO#e
return queue[1]; !,cQ'*<W8-
} Z/2,al\
3]O`[P,*%
public void remove() { ,f8}q]FTA
SortUtil.swap(queue,1,size--); /S:w&5e
fixDown(1); MU_!&(X_
} S}oG.r 9
file://fixdown )-bD2YA{
private void fixDown(int k) { 5h`m]#YEG
int j; NuC-qG#
while ((j = k << 1) <= size) { %f3c7\=C
if (j < size %26amp;%26amp; queue[j] j++; *QbM*oH
if (queue[k]>queue[j]) file://不用交换 Pm$F2YrO3
break; FU_fCL8yA
SortUtil.swap(queue,j,k); t8+?U^j
k = j; q';&SR#"`K
} :3f-9aRC!
} T;i?w
private void fixUp(int k) { |-~b$nUe
while (k > 1) { 0LetsDN7I
int j = k >> 1; y;Qy"-)qb
if (queue[j]>queue[k]) D:=t*2-Iv
break; ^cYStMjpy
SortUtil.swap(queue,j,k); h&)fu{
k = j; 3jvx2
} :PgF
} 7JbY}@
B$cOssl
} 89hF)80
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} u?Fnlne4@
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SortUtil： >vUB%OLyP
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package org.rut.util.algorithm; #v{Y=$L
T"n{WmVQ
import org.rut.util.algorithm.support.BubbleSort; -glugVq
import org.rut.util.algorithm.support.HeapSort; Rw{$L~\
import org.rut.util.algorithm.support.ImprovedMergeSort; IikG/8lP
import org.rut.util.algorithm.support.ImprovedQuickSort; V?OuIg%=:
import org.rut.util.algorithm.support.InsertSort; :1:3Svb<Y
import org.rut.util.algorithm.support.MergeSort; 8]S,u:E:N
import org.rut.util.algorithm.support.QuickSort; 3^{8_^I
import org.rut.util.algorithm.support.SelectionSort; }1 $hxfb
import org.rut.util.algorithm.support.ShellSort; + c`AE
M2}np
/** O`cdQu
* @author treeroot H5~1g6b@
* @since 2006-2-2 }VF#\q
* @version 1.0 3pB}2]
*/ ,Kuk_@(}5~
public class SortUtil { >9ob*6q,
public final static int INSERT = 1; 1Fv8T'
public final static int BUBBLE = 2; ODm&&W#*
public final static int SELECTION = 3; %B@!
public final static int SHELL = 4; >^dyQyK
public final static int QUICK = 5; $0_^=DEW
public final static int IMPROVED_QUICK = 6; &,J*_F<s2<
public final static int MERGE = 7; M|d={o9Hp
public final static int IMPROVED_MERGE = 8; djWcbC=g_
public final static int HEAP = 9; )D;*DUtMVm
)T9;6R$b
public static void sort(int[] data) { bG"HD?A_
sort(data, IMPROVED_QUICK); "jT#bIm
} 1@xP(XS
private static String[] name={ Q8p=!K
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" m#JI!_~!
}; K4C^m|e
|pJC:woq
private static Sort[] impl=new Sort[]{ g+/0DO_F3
new InsertSort(), 9z:K1
new BubbleSort(), :Zza)>l
new SelectionSort(), UVrQV$g!
new ShellSort(), xq2V0Jp1u
new QuickSort(), wzd`l?o,
new ImprovedQuickSort(), ndw7v
new MergeSort(), ;+sl7qlA4
new ImprovedMergeSort(), xOythvO
new HeapSort() t-WjL@$F/
}; tR1FO%nC
wxE?3%.j\
public static String toString(int algorithm){ {(4# )K2g%
return name[algorithm-1]; Wbe0ZnM]
} C}q>YRubZ
.jA\f:u#
public static void sort(int[] data, int algorithm) { Z^+rQ.%n"&
impl[algorithm-1].sort(data); qe?Qeh(!X
} +Gow5-(
} ~| k
public static interface Sort { ^-hErsK
public void sort(int[] data); @D~B{Hg
} #Q}_e7t
+c--&tBo
public static void swap(int[] data, int i, int j) { iwU[6A
int temp = data; =Q-k'=6\
data = data[j]; );Z]SGd
data[j] = temp; Ry?4h\UX5
} e # 5BPI
} LEZ&W;bCo