[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; 9 ,:#Q<UM
} k@ <dru
int i1=l; BmKf%:l}
int i2=mid+1; P -NR]f
for(int cur=l;cur<=r;cur++){ VCfHm"'E8
if(i1==mid+1) -0UR%R7q
data[cur]=temp[i2++]; .fbY2b([
else if(i2>r) ?5FlbiT
data[cur]=temp[i1++]; !B 4zU:d
else if(temp[i1] data[cur]=temp[i1++]; 9u^M{6
else )X?oBNsj
data[cur]=temp[i2++]; FRuPv6
} {CV+1kz
} r4pX47H
d(|q&b:
} " i:[|7
q>Di|5<y
改进后的归并排序: <o/!M6^:
r1}^\C
package org.rut.util.algorithm.support; "MU-&**
<pfl>Uf
import org.rut.util.algorithm.SortUtil; +: x[cK
9w- )??
/** D6Au)1y=&
* @author treeroot .u>[m.
* @since 2006-2-2 D%~tU70a
* @version 1.0 7mq&]4-G
*/ m^!:n$
public class ImprovedMergeSort implements SortUtil.Sort { 4j~q,#$LW
~n-Px)
private static final int THRESHOLD = 10; XVkw/l
+}O -WX?
/* #B<EMGH
* (non-Javadoc) }[Z'Sg]s
* g3].STz6w
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) OKAU*}_
*/ 9j|v D
public void sort(int[] data) { dzEi^* (8
int[] temp=new int[data.length]; K(i}?9WD
mergeSort(data,temp,0,data.length-1); tPQ|znB|
} r[4n2Mys
(IBT|K
private void mergeSort(int[] data, int[] temp, int l, int r) { XjF@kQeM=
int i, j, k; j1KNgAo<4
int mid = (l + r) / 2; =B9-}]DDO
if (l == r) 5]>*0#C S
return; a;t}'GQGk
if ((mid - l) >= THRESHOLD) ._^}M<o L
mergeSort(data, temp, l, mid); 0W(mx-[H/
else n74\{`8]o
insertSort(data, l, mid - l + 1); y92R}e\M
if ((r - mid) > THRESHOLD) +9w[/n^,G
mergeSort(data, temp, mid + 1, r); .ojEKu+EJ'
else gYhY1Mym
insertSort(data, mid + 1, r - mid); 9T;4aP>6j#
tGgxID
for (i = l; i <= mid; i++) { <Cv(@A->
temp = data; [K&%l]P7
} [ N|X
for (j = 1; j <= r - mid; j++) { !{g<RS(c
temp[r - j + 1] = data[j + mid]; rz@qW2
} &J)<1!|
int a = temp[l]; ID43s9
int b = temp[r]; is4}s,]$6
for (i = l, j = r, k = l; k <= r; k++) { I)rO|
if (a < b) { ;.V/ngaj
data[k] = temp[i++]; .JPN';
a = temp; IplOXD
} else { *Jgi=,!m
data[k] = temp[j--]; 8 MQq3
b = temp[j]; ^FKiVKI:
} S3\NB3@qC&
} eCYPd-d
} Fp/{L
C3}:DIn"w
/** >G:Q/3jh
* @param data H].|K/-p
* @param l 1Ng+mT
* @param i >\d&LLAe
*/ oT-gZedW(
private void insertSort(int[] data, int start, int len) { |Y>Jf~SN
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 7q+D}+ Xf
} 1(gs({
} 7v*gwBH
} ZeP=}0TGjn
} zY*9M3(X
QselW]
堆排序： j|t=%*
3[ xdls
package org.rut.util.algorithm.support; ECOJ .^
~Q&J\'GQH
import org.rut.util.algorithm.SortUtil; HU'Mi8xxy
M76p=*
/** 5EFt0?G
* @author treeroot 2#>;cn\
* @since 2006-2-2 hZx&j{
* @version 1.0 S@/{34,
*/ 4rU/2}.q
public class HeapSort implements SortUtil.Sort{ jVQy{8{G
fzIs^(:fl
/* (non-Javadoc) ; ~pgF_
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) r[S(VPo[()
*/ pR61bl)
public void sort(int[] data) { wtw=RA
MaxHeap h=new MaxHeap(); w"v!+~/9
h.init(data); yp#!$+a}
for(int i=0;i h.remove(); (xHmucmwp
System.arraycopy(h.queue,1,data,0,data.length); zmo2uUEd
} i"h\*B=
w:t~M[kTW
private static class MaxHeap{ $*ff]>#
DZSS
void init(int[] data){ :C:6bDQ
this.queue=new int[data.length+1]; %L=e%E=m
for(int i=0;i queue[++size]=data; *'>_XX
fixUp(size); xDo0bR(
} jH< #)R
} 1&|]8=pG7
{DRk{>K,
private int size=0; *?FVLE
.d<K`.O;
private int[] queue; tF:AnNp=
o-\h;aQJ
public int get() { gXxi; g
return queue[1]; <Ht"t]u*Bn
} ?9`j1[0
1Gsh%0r3
public void remove() { 2_q/<8t
SortUtil.swap(queue,1,size--); %e~xO x
fixDown(1); {<42PJtPY
} d4| )=
file://fixdown /j~~S'sw
private void fixDown(int k) { AY /9Io-
int j; y bhFDx
while ((j = k << 1) <= size) { 731Lz*IFg
if (j < size %26amp;%26amp; queue[j] j++; K!6T8^JH
if (queue[k]>queue[j]) file://不用交换 hY`<J]-'`
break; ]3LLlXtK[
SortUtil.swap(queue,j,k); ZSuoD$~k[
k = j; TxJk.c
} OG5{oH#K
} z@,pT"rb
private void fixUp(int k) { 1}d F,e
while (k > 1) { Va8 }JD
int j = k >> 1; UY3)6}g6
if (queue[j]>queue[k]) ZC?~RXL(
break; t<45[~[
SortUtil.swap(queue,j,k); (Ceruo S
k = j; i!a!qE.1
} `NIb?/!f
} QTHY{:Rmu
t\M6 d6
} eC-&.Fl
NNt n
} 90vWqL!
ZFtx&vrP
SortUtil： T8S&9BM7
L1SX2F8
package org.rut.util.algorithm; ?w:\0j5~
k4']q
import org.rut.util.algorithm.support.BubbleSort; i]ZGq7YJ%
import org.rut.util.algorithm.support.HeapSort; 3~`P8 9
import org.rut.util.algorithm.support.ImprovedMergeSort; Y/sav;
import org.rut.util.algorithm.support.ImprovedQuickSort; 'gY?=,dF>
import org.rut.util.algorithm.support.InsertSort; SY,ns*>1F
import org.rut.util.algorithm.support.MergeSort; &]TniQH
import org.rut.util.algorithm.support.QuickSort; bJ:5pBJ3
import org.rut.util.algorithm.support.SelectionSort; =Zj 7dn;EN
import org.rut.util.algorithm.support.ShellSort; hk?i0#7W
HZ9>4G3
/** {y"Kn'1
* @author treeroot JLd%rM\m
* @since 2006-2-2 nE]rPRU}[
* @version 1.0 YuhfPa
*/ n*\o. :f
public class SortUtil { Ae2N"%Ej
public final static int INSERT = 1; .q2r!B
public final static int BUBBLE = 2; S)EF&S(TC
public final static int SELECTION = 3; <V^o.4mOg>
public final static int SHELL = 4; HM% +Y47a
public final static int QUICK = 5; U^_\V BAk
public final static int IMPROVED_QUICK = 6; bc(MN8b]j
public final static int MERGE = 7; -C2!`/U
public final static int IMPROVED_MERGE = 8; #w;"s*
public final static int HEAP = 9; n*[ZS[I
!j$cBf4
public static void sort(int[] data) { Ce+:9}[
sort(data, IMPROVED_QUICK); mZiKA-t
} v.RA{a 9
private static String[] name={ -|V#U`mwF
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" H,D5)1Uu
}; JZ}zXv
Q&I #
private static Sort[] impl=new Sort[]{ Uh0g !zzp
new InsertSort(), wqG#jC!5
new BubbleSort(), zfop-qDOc
new SelectionSort(), 6.]~7n
new ShellSort(), H'i\N?VL
new QuickSort(), 9wx]xg4l"
new ImprovedQuickSort(), AJ\gDjj<
new MergeSort(), Y2VfJ}%Q
new ImprovedMergeSort(), Tf#Op v)
new HeapSort() g%J\YRo
}; 9,8/DW.K
FRxR/3&
public static String toString(int algorithm){ d./R;Z- I{
return name[algorithm-1]; @;O"-7Kk
} JL {H3r&/S
{+lU4u
public static void sort(int[] data, int algorithm) { s17)zi,?4
impl[algorithm-1].sort(data); "`;-5dg
} LGc8w>qE
l$5nv5r
public static interface Sort { ]EK(k7nH
public void sort(int[] data); *C55DO^w
} 9 m8KDB[N
* K$U[$s
public static void swap(int[] data, int i, int j) { *-ys}sX
int temp = data; T @^ S:K
data = data[j]; %f<>Kwr`2
data[j] = temp; 2=?3MXcjy
} fln[Q2zl
} w7`pbcY,