[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; 3: WEODV2
} wpYk`Lr
int i1=l; bA,Zfsr6#
int i2=mid+1; mi<Q3;m
for(int cur=l;cur<=r;cur++){ O+|C<;K
if(i1==mid+1) n<j+KD#a
data[cur]=temp[i2++]; 6 h#U,G
else if(i2>r) po*8WSl9c[
data[cur]=temp[i1++]; 6];3h>c]N
else if(temp[i1] data[cur]=temp[i1++]; KS93v9|
else 3sdL\
data[cur]=temp[i2++]; qE[YZ(/f0&
} vs=q<Uw)
} "lw|EpQk`
m!Z<\2OP
} ciN\SA ZY
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改进后的归并排序: |xcI~ X7Q
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package org.rut.util.algorithm.support; K2yNIq_
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import org.rut.util.algorithm.SortUtil; c?HUW
^@AyC"K
/** -)oUb=Lk{
* @author treeroot [,Go*r
* @since 2006-2-2 }' AY#g
* @version 1.0 ; $80}TY '
*/ a24 AmoWx
public class ImprovedMergeSort implements SortUtil.Sort { bg-/ 8,
.7^(~&5N
private static final int THRESHOLD = 10; ]<f(@]R/d
C$6FI`J
/* H( i
* (non-Javadoc) dREY m}1
* &Q~W{.
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) D?1fY!C:r
*/ ft(o-f7,
public void sort(int[] data) { +m%%Bz>
int[] temp=new int[data.length]; Icrnu}pl_
mergeSort(data,temp,0,data.length-1); N7J?S~x
} 8^ f:-5
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private void mergeSort(int[] data, int[] temp, int l, int r) { R\3a Sx L
int i, j, k; ":Tm6Nj
int mid = (l + r) / 2; rl%,9JD!
if (l == r) c]ARgrH-
return; F=e9o*z
if ((mid - l) >= THRESHOLD) 1]2]l*&3
mergeSort(data, temp, l, mid); ALTOi?
else +_i{4Iz~p
insertSort(data, l, mid - l + 1); +n;nvf}(
if ((r - mid) > THRESHOLD) @h{|tP%"
mergeSort(data, temp, mid + 1, r); W[O]Aal{
else GmWr
insertSort(data, mid + 1, r - mid); qXW\/NT"p<
pVy=rS-
for (i = l; i <= mid; i++) { 0wv#AT
temp = data; f+ceL'fr
} 8-nf4=ll
for (j = 1; j <= r - mid; j++) { ~%/Rc`
temp[r - j + 1] = data[j + mid]; zg<-%r'$
} . |T=T0^
int a = temp[l]; B]"`}jn
int b = temp[r]; ^_bG{du
for (i = l, j = r, k = l; k <= r; k++) { TR0y4u[
if (a < b) { 8J(j}</>a
data[k] = temp[i++]; >5~#BrpwG
a = temp; nL:&G'd
} else { `]eJF|"
data[k] = temp[j--]; LOx+?4|y
b = temp[j]; f"5O'QHGQK
} LN5LT'CE
} eA4:]A"
} +Ua|0>?
F$?Ab\#B
/** ;yt6Yp.6e
* @param data {'O><4
* @param l INi$-Y+
* @param i lln"c
*/ z5fE<=<X_W
private void insertSort(int[] data, int start, int len) { /IUu-/ D
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); )Fv.eIBY
} l!|c_
} J2W-l{`r<
} 1XSnnkJm
} s7 "xDDV
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堆排序： :]-oo*xP
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package org.rut.util.algorithm.support; -XV,r<''
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import org.rut.util.algorithm.SortUtil; | ;tH?E
/sKL|]i=
/** l/X_CM8y~
* @author treeroot l'+3 6
* @since 2006-2-2 'cs(gc0
* @version 1.0 5.~Je6K U
*/ '8X>,un
public class HeapSort implements SortUtil.Sort{ S 5S\zTPIf
6ZQ |L=Ytp
/* (non-Javadoc) fc9;ZX7
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Ap dXsL
*/ V,&%[H [
public void sort(int[] data) { "<ZV'z
MaxHeap h=new MaxHeap(); YP2VSK2Q
h.init(data); C Bkoky9&
for(int i=0;i h.remove(); C& +MRP
System.arraycopy(h.queue,1,data,0,data.length); r[L%ap\{
} FQ<-Wc
7]h%?W!
private static class MaxHeap{ ]ZY2\'
9jkz83/+<
void init(int[] data){ %v0M~J}+
this.queue=new int[data.length+1]; QJ2]8K)+C
for(int i=0;i queue[++size]=data; S>yiD`v
fixUp(size); r6m^~Wq!}
} }e[ E
} x%B_v^^^
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private int size=0; 7Q .Su
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private int[] queue; r<`:Q]
d9f7 &
public int get() { +K4XMf
return queue[1]; G$<(>"Yr~$
} 5p0~AN)
tDK@?PfKz
public void remove() { Q]k<Y
SortUtil.swap(queue,1,size--); <|Td0|x _q
fixDown(1); cI=6zMB
} >;fVuy
file://fixdown Cy~IB [
private void fixDown(int k) { |p|Zv H
int j; fzSkl`K}
while ((j = k << 1) <= size) { /7AHd ;
if (j < size %26amp;%26amp; queue[j] j++; BPY7O
if (queue[k]>queue[j]) file://不用交换 ;KL7SM%g4
break; D#g-mqar:
SortUtil.swap(queue,j,k); Th)
k = j; 5 D|#l*V
} DSrU7#
} Q dj(D\.
private void fixUp(int k) { wNf:_^|}
while (k > 1) { UUt"8]@[
int j = k >> 1; yZleots1
if (queue[j]>queue[k]) e=sc$1|4=
break; mxv?PP
SortUtil.swap(queue,j,k); }je<^]a
k = j; .p#kW:zspA
} ]*2),H1 c
} c#OxI*,+/
? x%s j
} b;i*}4h!
jBLTEb
} W{6QvQD8
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SortUtil： wLV,E,gM
ng1E'c]0@
package org.rut.util.algorithm; k<9,Ypa
"-4|HA
import org.rut.util.algorithm.support.BubbleSort; _}l(i1o,/
import org.rut.util.algorithm.support.HeapSort; |+cz\+
import org.rut.util.algorithm.support.ImprovedMergeSort; t~+M>Fjm?d
import org.rut.util.algorithm.support.ImprovedQuickSort; <y6`8J7:
import org.rut.util.algorithm.support.InsertSort; PQHztS"
import org.rut.util.algorithm.support.MergeSort; -)V0D,r$[
import org.rut.util.algorithm.support.QuickSort; BZeEZ2"
import org.rut.util.algorithm.support.SelectionSort; pzF_g-B
import org.rut.util.algorithm.support.ShellSort; T\6Qr$t
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/** A(y6]E!
* @author treeroot 1-kuK<KR
* @since 2006-2-2 V3,C5KKk&z
* @version 1.0 9jal D X
*/ `G\ qGllX
public class SortUtil { N*IroT3
public final static int INSERT = 1; ti5fsc
public final static int BUBBLE = 2; aBAoSn
public final static int SELECTION = 3; vXJs.)D7
public final static int SHELL = 4; !wYN",R-
public final static int QUICK = 5; ?JuJu1
public final static int IMPROVED_QUICK = 6; CsR[@&n'
public final static int MERGE = 7; mF6-f#t>H+
public final static int IMPROVED_MERGE = 8; 6uRE9h|
public final static int HEAP = 9; xdSMYH{2A
z g7Q`
public static void sort(int[] data) { YD4I2'E
sort(data, IMPROVED_QUICK); ;}B=g/C
} m$8siF{<q
private static String[] name={ #qd!_oN
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" >tg)F|@
}; 4H8r[
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private static Sort[] impl=new Sort[]{ 5_^d3LOT0x
new InsertSort(), i\xs!QU
new BubbleSort(), hb[ThQ
new SelectionSort(), ?$pNduE
new ShellSort(), @nH3nn
new QuickSort(), w-).HPe
new ImprovedQuickSort(), %JeNDXbI4
new MergeSort(), m(f`=+lqI`
new ImprovedMergeSort(), dle\}Sy=
new HeapSort() 0:{W t
}; Bc=(1ty)
M+t)#O4
public static String toString(int algorithm){ 49FP&NgK
return name[algorithm-1]; XDK Me}
} _`2%)#^o
'(K4@[3t
public static void sort(int[] data, int algorithm) { dsIbr"m
impl[algorithm-1].sort(data); eF3NyL(A
} ?V`-z#y7
tB;PGk_6
public static interface Sort { ^gVQ6=z%
public void sort(int[] data); XfcYcN
} AbNr]w&pXC
-x?Z2EA!
public static void swap(int[] data, int i, int j) { $1=7^v[U
int temp = data; N XB8u6
data = data[j]; g$Tsht(rHD
data[j] = temp; 0Gu77&
} A rE~6X
} EW$drY@