[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; <'N"GLJ
} }$iKz*nx|
int i1=l; ?l/VCEZP
int i2=mid+1; lHerEv<ja
for(int cur=l;cur<=r;cur++){ $ @g\wz
if(i1==mid+1) He vZ}.
data[cur]=temp[i2++]; a> qB k})
else if(i2>r) (yA`h@@WS
data[cur]=temp[i1++]; v7gs $'Q
else if(temp[i1] data[cur]=temp[i1++]; o9\J vJk
else 5, "
data[cur]=temp[i2++]; )-VpDW!%_
} 2T 3tKX
} pse$S=
0Lb:N]5m8
} opsjei@
xl2;DFiYt
改进后的归并排序: %])U(
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package org.rut.util.algorithm.support; cQ}3? v
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import org.rut.util.algorithm.SortUtil; v+d} _rCT
7"Qj(N
/** 41G}d+
* @author treeroot K93L-K^J
* @since 2006-2-2 %4'<0
* @version 1.0 eFKF9m
*/ yUnNf 2i
public class ImprovedMergeSort implements SortUtil.Sort { H j [!F%
_Ns/#Xe/
private static final int THRESHOLD = 10; F3nYMf
j/ [V<
/* SG\6qE~
* (non-Javadoc) .ni<'
* =EFCd=i
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) v}\4/u
*/ 4}4cA\B:n
public void sort(int[] data) { tE'^O< K
int[] temp=new int[data.length]; DpQ\q;
mergeSort(data,temp,0,data.length-1); @n,V2`"
} Br4[hUV/
{,aX|*1Ku~
private void mergeSort(int[] data, int[] temp, int l, int r) { ~(*2:9*0
int i, j, k; \MqOHM.[
int mid = (l + r) / 2; Op()`x m
if (l == r) ?}g^/g !
return; q7z`oK5
if ((mid - l) >= THRESHOLD) 1A%0y)]
mergeSort(data, temp, l, mid); boS=
else A |u-VXQ
insertSort(data, l, mid - l + 1); H46N!{<;@
if ((r - mid) > THRESHOLD) 6 &Lr/J76
mergeSort(data, temp, mid + 1, r); Ef @
else r)S:-wP
insertSort(data, mid + 1, r - mid); 0:I[;Qt
sGFvSW
for (i = l; i <= mid; i++) { H^ 'As;R
temp = data; n)|{tb^
} V82HO{ D
for (j = 1; j <= r - mid; j++) { S5o,\wT
temp[r - j + 1] = data[j + mid]; eWWqK9B.-
} x" lcE@(
int a = temp[l]; qP{Fwn
int b = temp[r]; 7+9o<j@@o
for (i = l, j = r, k = l; k <= r; k++) { HK NT. a
if (a < b) { gFpub_
data[k] = temp[i++]; "?%2`*\
a = temp; @yM$Et5
} else { @U+#@6
data[k] = temp[j--]; /|0xOiib
b = temp[j]; Z_U4Yy'NNw
} LXoZ.3S
} mq}V @H5
} n g%~mt
E/V_gci
/** .8wf {y
* @param data ZJe^MnE (G
* @param l `=V p 0tPI
* @param i EDT9O
*/ z~"Q_gme
private void insertSort(int[] data, int start, int len) { 5G2G<[p5oQ
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); j*\oK@
} ?lE&ow
} 6l'J!4*qY
} 3{)!T;Wd
} fUMjLA|*I<
iGPrWe@.
堆排序： OxQ5P;O
&V|kv"Wwj
package org.rut.util.algorithm.support; .Hnhd/ c
cgnMoBIc
import org.rut.util.algorithm.SortUtil; LLc^SP j
3xk_ZK82
/** 4VF4 8
* @author treeroot J}NMF#w/;
* @since 2006-2-2 e"y-A&|
* @version 1.0 r]@T9\9
*/ !(Ymc_s
public class HeapSort implements SortUtil.Sort{ |LW5dtQ
[tT_ z<e`
/* (non-Javadoc) yh2)Pc[
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) S B~opN
*/ -Uan.#~S
public void sort(int[] data) { !2kM
MaxHeap h=new MaxHeap(); %QG3~b% h
h.init(data); uK]-m
for(int i=0;i h.remove(); k%3)J"|/
System.arraycopy(h.queue,1,data,0,data.length); IL go:xQ
} #{*5rKiL
5,-g^o7
private static class MaxHeap{ )DmydyQ'
}uNj#Uf
void init(int[] data){ mqHcD8X
this.queue=new int[data.length+1]; wPEK5=\4Ob
for(int i=0;i queue[++size]=data; mv>0j<C91
fixUp(size); mPU}]1*p
} @F]w]d
} IsmZEVuC
hraR:l D
private int size=0; eR4ib-nS
:zX^H9'E<(
private int[] queue; A!,c@Kv 3
zMRa<G7
public int get() { N5{v;~Cm}V
return queue[1]; 2Z(t/Zp>
} Tdade+
veuX/>!
public void remove() { Ni8%K6]z
SortUtil.swap(queue,1,size--); (/At+MF3E
fixDown(1); ^vxx]Hji
} BTD_j&+(
file://fixdown EnGh&]
private void fixDown(int k) { &\I<j\F2/
int j; m.rV1#AI
while ((j = k << 1) <= size) { i}:hmy'
if (j < size %26amp;%26amp; queue[j] j++; [(2^oTSRaq
if (queue[k]>queue[j]) file://不用交换 fP:]s@$
break; mKjTJzS
SortUtil.swap(queue,j,k); O&MH5^I
k = j; ;O1jf4y
} LofpBO6^
} b}fC' h
private void fixUp(int k) { BYu(a
while (k > 1) { /lbj!\~
int j = k >> 1; W/\pqH
if (queue[j]>queue[k]) )H@<A93
break; <jh7G
SortUtil.swap(queue,j,k); -.r"|\1X
k = j; TFG? EO
} :8(jhs
} ZR -RzT1
u(FOSmNkN
} &a4FGzR#
#q K.AZi
} J90:c@O"w
cpl Ny?UIC
SortUtil： Ux1j+}y
T9}~]zW7P
package org.rut.util.algorithm; qSlo)aP
[0qswsV
import org.rut.util.algorithm.support.BubbleSort; K>vl o/#!
import org.rut.util.algorithm.support.HeapSort; L*dGo,oN
import org.rut.util.algorithm.support.ImprovedMergeSort; a_bZT4
import org.rut.util.algorithm.support.ImprovedQuickSort; 7TEpjSuF
import org.rut.util.algorithm.support.InsertSort; @`)>-k
import org.rut.util.algorithm.support.MergeSort; %f'=9pit
import org.rut.util.algorithm.support.QuickSort; Xq )7Im}?
import org.rut.util.algorithm.support.SelectionSort; jI'?7@32`
import org.rut.util.algorithm.support.ShellSort; vmEn$`&2t
H\V?QDn
/** ?A;RTM
* @author treeroot gaQ E'qp>
* @since 2006-2-2 o2B|r`R
* @version 1.0 C+P.7]?&
*/ rHjDf[5+
public class SortUtil { C[<{>fl)
public final static int INSERT = 1; 'zav%}b]L
public final static int BUBBLE = 2; p+<qI~
public final static int SELECTION = 3; p2Gd6v.t
public final static int SHELL = 4; 1) K<x
public final static int QUICK = 5; x${C[gxq9F
public final static int IMPROVED_QUICK = 6; L-)ZjXzk
public final static int MERGE = 7; jJw
public final static int IMPROVED_MERGE = 8; :-#7j} R&
public final static int HEAP = 9; T59FRX
eI:x4K,#
public static void sort(int[] data) { ]KEE+o
sort(data, IMPROVED_QUICK); Ky7.&6\n
} Q|P M6ta
private static String[] name={ mi$C%~]5m
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" H{yBDxw
}; VRgckh m
n|?sNM<J3
private static Sort[] impl=new Sort[]{ OM^`P
new InsertSort(), =$+0p3[r
new BubbleSort(), wl%ysM|x
new SelectionSort(), m' S{P:TK
new ShellSort(), % >a /m.$
new QuickSort(), y`8U0TE3R
new ImprovedQuickSort(), Ym"^Ds}
new MergeSort(), I L7kpH+y
new ImprovedMergeSort(), Du +_dr^4
new HeapSort() QHja4/
}; WF*j^ %5
?$ov9U_
public static String toString(int algorithm){ Dq%}({+
return name[algorithm-1]; @`+\vmfD
} ^7ID |uMr
^!C
public static void sort(int[] data, int algorithm) { x^c,cV+*
impl[algorithm-1].sort(data); c%O97J.5b
} aCH;l~+U
c$)>$&([
public static interface Sort { !( +M
public void sort(int[] data); ]mi\Y"RO
} cAGM|%
^`M%g2x
public static void swap(int[] data, int i, int j) { 6HJsIeQ
int temp = data; ;nL7Hizo,
data = data[j]; a#+$.e5
data[j] = temp; |A,.mOT
} '5*&
} 8@+<W%+th