[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; Qq5)|m
} zdr?1=
int i1=l; k+&|*!j
int i2=mid+1; C6GYhG]
for(int cur=l;cur<=r;cur++){ *F=wMWa
if(i1==mid+1) eI- ~ +.
data[cur]=temp[i2++]; K{N#^L!
else if(i2>r) k)4
data[cur]=temp[i1++]; .t\5H<z
else if(temp[i1] data[cur]=temp[i1++]; _,5(HETE2
else o#G7gzw)
data[cur]=temp[i2++]; # *\PU
} -BR&b2
} I9_tD@s"(
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} -8g ;t3z
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改进后的归并排序: PZQ}G*p3
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package org.rut.util.algorithm.support; &AC-?R|Dp
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import org.rut.util.algorithm.SortUtil; U1dz:OG>
H=EvT'g
/** wOINcEdx
* @author treeroot 6:J @
* @since 2006-2-2 Ot5 $~o
* @version 1.0 Jo_h?{"L{
*/ % `\8z
public class ImprovedMergeSort implements SortUtil.Sort { R|Y)ow51
R/U"]Rc
private static final int THRESHOLD = 10; -49OE*uF
J=5G<
/* g;Bq#/w
* (non-Javadoc) Jt@7y"<
* WnU"&XZ
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) o^2.&e+dQ
*/ }B^KV#_{S
public void sort(int[] data) { ]Ocf %(
int[] temp=new int[data.length]; Lr_+)l
mergeSort(data,temp,0,data.length-1); -7>vh|3
} &$|k<{j[<f
E:L =>}
private void mergeSort(int[] data, int[] temp, int l, int r) { Xb5n;=)
int i, j, k; oe# :EfT
int mid = (l + r) / 2; % =br-c
if (l == r) rer=o S
return; C 3b
if ((mid - l) >= THRESHOLD) Xq1n1_Z
mergeSort(data, temp, l, mid); `dx+Qp
else lmgMR|v
insertSort(data, l, mid - l + 1); 7?dB&m6W
if ((r - mid) > THRESHOLD) $*{PUj
mergeSort(data, temp, mid + 1, r); fOF02WP^
else ;spuBA)[X
insertSort(data, mid + 1, r - mid); )W(?wv!,
.YKQ6
for (i = l; i <= mid; i++) { /|bir6Y:
temp = data; j"7 z
} ej]^VS7w[r
for (j = 1; j <= r - mid; j++) { ==l p\
temp[r - j + 1] = data[j + mid]; ;Z%ysLA
} _A;jtS)SY
int a = temp[l]; w$u=_
int b = temp[r]; j_H{_Ug
for (i = l, j = r, k = l; k <= r; k++) { %e+hM $Q
if (a < b) { &Ru|L.G`
data[k] = temp[i++]; Nc,"wA
a = temp; x~?,Wv|cm
} else { uI}S9
data[k] = temp[j--]; k9vr6We'
b = temp[j]; &&\ h%-Jc
} 7%c9 nY
} !;x
} [-x~Q[
- /]ro8V$
/** 3?|Fn8dQR.
* @param data Zz'(!h Uy
* @param l b'pbf
* @param i mqrP0/sN
*/ z| Hl*T
private void insertSort(int[] data, int start, int len) { EW%%W6O6
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); H[wJ; l
} /V+&#N
} gYn1-/Z>I
} hPE#l?H@A
} 'ejuzE9
r /63
堆排序： oJ ~ZzW
s#/JMvQ#
package org.rut.util.algorithm.support; f ?_YdVZ
*]nha1!S
import org.rut.util.algorithm.SortUtil; CkE@Ll3Z
5"u-oE&
/** GNS5v-"H
* @author treeroot @>,3l;\Zh
* @since 2006-2-2 $Q{)AN;m
* @version 1.0 BG_m}3j
*/ _iLXs
public class HeapSort implements SortUtil.Sort{ ,>A9OTSN\
y44FejH(v
/* (non-Javadoc) UK*+EEv
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) O&.^67\|
*/ I&l1b>
public void sort(int[] data) { []/=!?5B
MaxHeap h=new MaxHeap(); :0$(umW@I"
h.init(data); i;;CU9`E2q
for(int i=0;i h.remove(); ^N#kW-i
System.arraycopy(h.queue,1,data,0,data.length); kbJ/7
} M8X*fYn
s\_-` [B0
private static class MaxHeap{ -|B?pR
5Al59]
void init(int[] data){ !/znovoD
this.queue=new int[data.length+1]; Ck8`$x&t
for(int i=0;i queue[++size]=data; rVowHP
fixUp(size); BoYWx^VHx^
} E@^`B9;Q7
} d!7cIYVZ
4SCb9|/Q
private int size=0; e.hHpjWi?Z
A\ds0dUE
private int[] queue; u`dWU}m)
u4bPj2N8I
public int get() { k<wX??'
return queue[1]; hPF9y@lh
} &1YAPxX
H>AQlO+J
public void remove() { ZGK*]o=)
SortUtil.swap(queue,1,size--); VJ;n0*/
fixDown(1); \g< M\3f
} ?&EPZqI
file://fixdown #X'!wr|-
private void fixDown(int k) { *2N$l>ql:k
int j; .>DqdtP[
while ((j = k << 1) <= size) { li;Np5P
if (j < size %26amp;%26amp; queue[j] j++; Lo _5r T"
if (queue[k]>queue[j]) file://不用交换 x9XQ
break; g+;m?VJ
SortUtil.swap(queue,j,k); 9Slx.9f
k = j; ^dFdw\
} (|L0s)
} Ql&5fyW
private void fixUp(int k) { VeeQmR?u-
while (k > 1) { /{ Lo0
int j = k >> 1; jR`q y<
if (queue[j]>queue[k]) pt<!b0G
break; CM?dB$AwX
SortUtil.swap(queue,j,k); "- @{ )
k = j; 3Xyu`zS&
} +#7e?B
} f{MXH&d 1\
@N,dA#
} ts/rV#s~
|1C=Ow*"
} PrqN5ND
mu`h6?v
SortUtil： T#%r\f,l0
hw]x T5
package org.rut.util.algorithm; 2iC7c6hc
D_er(
import org.rut.util.algorithm.support.BubbleSort; B 3<T#
import org.rut.util.algorithm.support.HeapSort; g>)&Q>}=W
import org.rut.util.algorithm.support.ImprovedMergeSort; >5-z"f
import org.rut.util.algorithm.support.ImprovedQuickSort; },G6IuH%
import org.rut.util.algorithm.support.InsertSort; Hh`x>{,|S
import org.rut.util.algorithm.support.MergeSort; ,?g}->ZB
import org.rut.util.algorithm.support.QuickSort; 3p`*'j2R
import org.rut.util.algorithm.support.SelectionSort; l?GN& u
import org.rut.util.algorithm.support.ShellSort; w:%3]2c
s<,[xkMB
/** :H($|$\h
* @author treeroot @H[)U/.
* @since 2006-2-2 {"hX_t
* @version 1.0 tDn{;ED<
*/ 46`(u"RP
public class SortUtil { K. [2uhB)
public final static int INSERT = 1; uFPJ}m[>5
public final static int BUBBLE = 2; ^1y (N>W
public final static int SELECTION = 3; &L6xagR7M
public final static int SHELL = 4; HUUN*yikj
public final static int QUICK = 5; sk*AlSlM
public final static int IMPROVED_QUICK = 6; #mu3`,9V
public final static int MERGE = 7; a&oz<4oT
public final static int IMPROVED_MERGE = 8; O#Y;s;)i"
public final static int HEAP = 9; $M%<i~VXe&
_Q&O#f
public static void sort(int[] data) { z+IHt(
sort(data, IMPROVED_QUICK); \$;Q3t3
} nO-1^HUl
private static String[] name={ EG=~0j~
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 8K(3{\J[V
}; F?"#1je
hH Kd+QpI
private static Sort[] impl=new Sort[]{ +<qmVW^X
new InsertSort(), )Pr*\<Cld
new BubbleSort(), :)7{$OR&
new SelectionSort(), mx\b6w7
new ShellSort(), <zUU`
new QuickSort(), E(t:F^z&D
new ImprovedQuickSort(), "h.-qQGU%
new MergeSort(), bWp40&vx
new ImprovedMergeSort(), Z?@1X`@
new HeapSort() g+CTF67
}; B_Qi
U9N1)3/u
public static String toString(int algorithm){ @|A wT
return name[algorithm-1]; H_3-"m&3
} 4DGc[
H|Vq
public static void sort(int[] data, int algorithm) { r7dvj#^
impl[algorithm-1].sort(data); Y<1]{4Wt
} HI+87f_Q
~Ey)9phZK
public static interface Sort { P?QVT;]
public void sort(int[] data); sqKLz
} "v%|&@
bBwMx{iNNz
public static void swap(int[] data, int i, int j) { >|Xy'ZR
int temp = data; 3RYg-$NK[
data = data[j]; 1rhEk|pGZ
data[j] = temp; i,k.#Vx[m
} [):&R1U
} Kterp%J?