[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; OP|.I._I
} vbWJhjK0h
int i1=l; o]|oAN9
int i2=mid+1; f $.\o
for(int cur=l;cur<=r;cur++){ Gh$y#0qr
if(i1==mid+1) [L*[j.r7[
data[cur]=temp[i2++]; 3Y1TQ;i,wQ
else if(i2>r) c<+g|@A#
data[cur]=temp[i1++]; zfP[1
else if(temp[i1] data[cur]=temp[i1++]; P,$[|)[E
else PtRj9TT
data[cur]=temp[i2++]; 1%SJ1oY
} |~/3u/
} ^^4K/XBve
s]F?=yEp
} }"&n[/8~
f*|8n$%
改进后的归并排序: ubzb
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package org.rut.util.algorithm.support; I*+LJy;j
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import org.rut.util.algorithm.SortUtil; uHUvntr
j#LV7@H.e?
/** D y`W5_xSz
* @author treeroot vy{rwZ$
* @since 2006-2-2 x%IXwP0
* @version 1.0 5A2Y'ms,/
*/ q19k<BqR
public class ImprovedMergeSort implements SortUtil.Sort { jlRl2 #"
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private static final int THRESHOLD = 10; (6ohrM>Q
&#vk4C_8m
/* 7GBZA=J
* (non-Javadoc) d5w_[=9U
* DqurHQ z)m
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) j{Yt70Wv
*/ YZ"+c&V"
public void sort(int[] data) { 8CP9DS
int[] temp=new int[data.length]; g)Vq5en*
mergeSort(data,temp,0,data.length-1); "%.|n|
} =RW* %8C
IKMsY5i
private void mergeSort(int[] data, int[] temp, int l, int r) { QoW(tM
int i, j, k; KA|&Q<<{@
int mid = (l + r) / 2; 27Kc-rcB
if (l == r) zK' _e&*
return; 3i]"#wK
if ((mid - l) >= THRESHOLD) dl*_ m3T
mergeSort(data, temp, l, mid); u|_LR5S!j
else kz7vbY
insertSort(data, l, mid - l + 1); 2cs?("8e%
if ((r - mid) > THRESHOLD) vKU]80T
mergeSort(data, temp, mid + 1, r); dp"<KcP_
else ]97Xu_
insertSort(data, mid + 1, r - mid); }"%!(rx
di]$dl|Wi
for (i = l; i <= mid; i++) { rt5oRf:wY
temp = data; ql{^"8x
} =R8f)UQYx
for (j = 1; j <= r - mid; j++) { (ZE%tbm2
temp[r - j + 1] = data[j + mid]; CbTf"pl
} Qag|nLoT
int a = temp[l]; ;x!,g5q"q
int b = temp[r]; Z-4K?;g'k
for (i = l, j = r, k = l; k <= r; k++) { X;s3y{ku
if (a < b) { t/v@vJ`vSH
data[k] = temp[i++]; nu4Pc
a = temp; otWo^CE$
} else { a^RZsR
data[k] = temp[j--]; U=haXx4N
b = temp[j]; cwH,l$
} th.M.jas
} g2[K<
} rtB|N-
!pd7@FwC
/** 0=N4O!X9
* @param data 3gxf~$)?
* @param l 7j@^+rkr3f
* @param i LFEp
*/ /`7 IK
private void insertSort(int[] data, int start, int len) { E0sbU<11
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 4u3 \xR?w6
} 2^zg0!z
} ]h #WkcXQ
} GIl:3iB49
} Nbgp_:{
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堆排序： Y;fuh[#
Am2*-
package org.rut.util.algorithm.support; N+*(Y5TU
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import org.rut.util.algorithm.SortUtil; !d:tIu{)
I?f"<5[0
/** yQu vW$
* @author treeroot ~GNyE*t/Y
* @since 2006-2-2 f2uZK!:m
* @version 1.0 UqD5 A~w
*/ B"~U<6s0
public class HeapSort implements SortUtil.Sort{ PLO\L W
"F&Tnhh4
/* (non-Javadoc) LTg?5GwD\j
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) \ua9thOG
*/ kFS0i%Sr
public void sort(int[] data) { jFgZ}Xp
MaxHeap h=new MaxHeap(); 5/Ydv RB67
h.init(data); aF D="Zh
for(int i=0;i h.remove(); 2;&mkcK'
System.arraycopy(h.queue,1,data,0,data.length); 613/K`o
} {]+ jL1
\V._Z>]
private static class MaxHeap{ 91BY]N
`ffj8U
void init(int[] data){ Z$Z`@&U=
this.queue=new int[data.length+1]; 2}D,df'W4
for(int i=0;i queue[++size]=data; ].LJt['%8
fixUp(size); CoKiQUW
} Us1@\|]
} !.9l4@z#
kJ/+IGV^v
private int size=0; A$/KP\0Y2
]a8eDy
private int[] queue; g* %bzfk=|
Y3D3.T6Q
public int get() { 1oB$MQoc
return queue[1]; |p;4dL
} fwRGT|":B
0rV/qMo;K
public void remove() { 2q+la|1Cr
SortUtil.swap(queue,1,size--); :RPVT,O}
fixDown(1); ZmNZS0j
} 4"LPJX)Q
file://fixdown pMOD\J:l,
private void fixDown(int k) { N[>:@h
int j; "_t4F4z
while ((j = k << 1) <= size) { X88F>1}
if (j < size %26amp;%26amp; queue[j] j++; /#29Y^Z)=
if (queue[k]>queue[j]) file://不用交换 wtlB
break; [70Y,,w
SortUtil.swap(queue,j,k); Mk<m6E$L
k = j; IT,"8s
} QDP-E[
} SzRL}}I
private void fixUp(int k) { 2%bhW,?I
while (k > 1) { S<*';{5~
int j = k >> 1; '=$TyiU
if (queue[j]>queue[k]) MdLj,1_T
break; R j-jAH
SortUtil.swap(queue,j,k); cnbo+U
k = j; HTw#U2A;+
} `Rrr>vj
} E`~i-kf
ma3Qi/
} #sL/y
0xv\D0
} Tu==49
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SortUtil： X!o@f$
bH_I7G&m
package org.rut.util.algorithm; .-J`d=Krp
8`a,D5U:
import org.rut.util.algorithm.support.BubbleSort; S3;lKr
import org.rut.util.algorithm.support.HeapSort; L+Eu d
import org.rut.util.algorithm.support.ImprovedMergeSort; 9wzwY[{
import org.rut.util.algorithm.support.ImprovedQuickSort; ]Uu aN8
import org.rut.util.algorithm.support.InsertSort; b"^\)|*4;
import org.rut.util.algorithm.support.MergeSort; r9<V%PHv
import org.rut.util.algorithm.support.QuickSort; fa"\=V2S
import org.rut.util.algorithm.support.SelectionSort; ZH% we
import org.rut.util.algorithm.support.ShellSort; v< Ty|(gd
K@HLIuz4t
/** Q Qi@>v|d
* @author treeroot 2,+d|1(4o
* @since 2006-2-2 70{RDj6{
* @version 1.0 |l$ u<3
*/ f]c<9Q>*
public class SortUtil { tO7I&LNE
public final static int INSERT = 1; bZu$0IG
public final static int BUBBLE = 2; $]Jf0_
public final static int SELECTION = 3; 5|5=Y/
public final static int SHELL = 4; aJa.U^1{
public final static int QUICK = 5; !f@XDW&R
public final static int IMPROVED_QUICK = 6; O 3G:0xF
public final static int MERGE = 7; WBa /IM
public final static int IMPROVED_MERGE = 8; ;>5,
public final static int HEAP = 9; ,|A{!j`
t]4!{~,
public static void sort(int[] data) { J, r Xx:
sort(data, IMPROVED_QUICK); 1}`2\3,
} rJX\6{V!_
private static String[] name={ 'bl%Y).9w
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" lz- iCZ
}; <M=';h^w2
GZ <nXU>
private static Sort[] impl=new Sort[]{ W|0My0y
new InsertSort(), W5|j1He&
new BubbleSort(), )]3L/
new SelectionSort(), 0Lx3]"v
new ShellSort(), \d:h$
new QuickSort(), PFm\[2
new ImprovedQuickSort(), )}quw"H
new MergeSort(), ,2,W^HJ
new ImprovedMergeSort(), j|k@MfA
new HeapSort() RU7!U mf
}; i]dz}=j'
IEc>.J|T&
public static String toString(int algorithm){ 4aA9\\hfGY
return name[algorithm-1]; *N`;I@Q"[
} Wy8,<K{
1c/ X
public static void sort(int[] data, int algorithm) { K|Om5 p
impl[algorithm-1].sort(data); tR5tPPw
} K\~v&
Et.j1M|g
public static interface Sort { ~oo'ky*H!
public void sort(int[] data); J+lGh9G
} sSz%V[XWL
86y%=!bS
public static void swap(int[] data, int i, int j) { I'?6~Sn3
int temp = data; ldYeX+J _
data = data[j]; {!MVc<G.
data[j] = temp; an.`dBm
} oCbpK
} B2Qp}