[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; D:U:( pg
} 4T`u?T]
int i1=l; d Ayof=
int i2=mid+1; !1]72%k[
for(int cur=l;cur<=r;cur++){ [2gK^o&t
if(i1==mid+1) @|6n.'f+
data[cur]=temp[i2++]; x^qmYX$'1b
else if(i2>r) ><viJ$i
data[cur]=temp[i1++]; WQ<J<$$uu
else if(temp[i1] data[cur]=temp[i1++]; { ,/mQ3
else 3 ~0Z.!O
data[cur]=temp[i2++]; a=&a)FR
} z[B*sbS
} QDRSQ[\
ji="vs=y
} # nwEF QA
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改进后的归并排序: lV:R8^d
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package org.rut.util.algorithm.support; ^<'5 V)
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import org.rut.util.algorithm.SortUtil; `=RJ8u
Qa~o'
/** 6&S;Nrg9
* @author treeroot 57Q^"sl
* @since 2006-2-2 TggM/@k
* @version 1.0 IExo#\0'6
*/ SEq_37
public class ImprovedMergeSort implements SortUtil.Sort { -~~"}u
-tAdA2?G
private static final int THRESHOLD = 10; mVg-z~44T
<LIL{g0eX
/* UJ1iXV[h"
* (non-Javadoc) hW$B;
* V~tq _
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 1hw1AJ}(F
*/ aB;syl{
public void sort(int[] data) { Q>] iRx>MZ
int[] temp=new int[data.length]; {1;j1|CI
mergeSort(data,temp,0,data.length-1); .i>; ?(GH
} dkt'~
dFFJw[$8w
private void mergeSort(int[] data, int[] temp, int l, int r) { q{HfT d
int i, j, k; Q0i.gEwe
int mid = (l + r) / 2; .p NWd
if (l == r) 4d#w}
return; BoE;,s>]NW
if ((mid - l) >= THRESHOLD) ml<X92Y
mergeSort(data, temp, l, mid); obKWnet
else zs<W>gBq
insertSort(data, l, mid - l + 1); A9' [x7N
if ((r - mid) > THRESHOLD) Fq>=0 )
mergeSort(data, temp, mid + 1, r); T&c0j(
else Veo:G{
insertSort(data, mid + 1, r - mid); !'o5X]s
55MrsiW
for (i = l; i <= mid; i++) { &^3KF0\Q
temp = data; ^m.QW*
} .[%em9u
for (j = 1; j <= r - mid; j++) { r|wB& PGW
temp[r - j + 1] = data[j + mid]; =QFnab?N
} SQhk)S
int a = temp[l]; S=H<5*]g
int b = temp[r]; xdb9oH
for (i = l, j = r, k = l; k <= r; k++) { 0g}+%5]yg
if (a < b) { 64;F g/t
data[k] = temp[i++]; L1A0->t
a = temp; Oa~|a7`o
} else { F(c~D0
data[k] = temp[j--]; ~V&4<=r`
b = temp[j]; gKy@$at&
} VU3xP2c:
} l!CWE
} px;5X4U
i1k(3:ay<
/** yQ5&S]Xk$$
* @param data 0`.3`Mk
* @param l F4'g}yOLd
* @param i qI;"yG-x-
*/ X_GR{z%
private void insertSort(int[] data, int start, int len) { "9,z"k
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); /cHd&i,>
} >Pne@w!*
} Seh[".l
} tZ,vt7
} u3)Oj7cX
],CJSA!5F
堆排序： #U45;idp
'zCJK~x`x
package org.rut.util.algorithm.support; r2A%.bL#
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import org.rut.util.algorithm.SortUtil; qOy3D~
^*.S7.;2o
/** 9s\(yC8h
* @author treeroot V\Oe]w
* @since 2006-2-2 ^%l~|w
* @version 1.0 0!X;C!v;
*/ H%N!;Jz=
public class HeapSort implements SortUtil.Sort{ par|j]
c@9jc^CJ
/* (non-Javadoc) "^E/N},%u5
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 9l).L L
*/ v Yt-Nx
public void sort(int[] data) { (O{5L(
MaxHeap h=new MaxHeap(); <Y~?G:v6+
h.init(data); 4a3Xz,[(a
for(int i=0;i h.remove(); v,t;!u,40
System.arraycopy(h.queue,1,data,0,data.length); &2IrST{d:V
} G{$(t\>8
1,@-y#V_
private static class MaxHeap{ YI05?J}
Trd/\tX#v&
void init(int[] data){ Ei!t#'*D<
this.queue=new int[data.length+1]; <[{Ty+
for(int i=0;i queue[++size]=data; BG:l Zj'I
fixUp(size); 6&/H XqP
} G8xM]'y
} sVP[7&vr~
lF-;h{
private int size=0; YT!QY@qw
SN2X{Q|*
private int[] queue; Ar&]/X,WG
mD}&X7
public int get() { iC-WQkQY
return queue[1]; N<c98
} E~oQ%X~
#N%ATV
public void remove() { ]D|sQPi]F
SortUtil.swap(queue,1,size--); tY$ .(2Ua
fixDown(1); "0x"Xw#I
} 9_Tk8L#
file://fixdown 1Xy{&Ut\
private void fixDown(int k) { qh}M!p2
int j; P(?i>F7s
while ((j = k << 1) <= size) { g7*cwu
if (j < size %26amp;%26amp; queue[j] j++; Z}bUvr XP
if (queue[k]>queue[j]) file://不用交换 ECHl9; +
break; H':dLR
SortUtil.swap(queue,j,k); .5=Qfvi*
k = j; (?MRbX]@
} &1O[N*$e
} ;)Rvk&J5
private void fixUp(int k) { |k5uVhN
while (k > 1) { [@D+kL*>
int j = k >> 1; WK7=z3mu
if (queue[j]>queue[k]) U9:?d>7
break; ,EPs>#d
SortUtil.swap(queue,j,k); sO7$b@"u.
k = j; @91Q=S
} #6g-{OBv
} `>:ozN#)\
7{=<_
} Kj[X1X5
&.k'Dj2hf
} |~mq+:44+
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SortUtil： ^bpxhf x
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package org.rut.util.algorithm; v=Ep
4-^LC<}k
import org.rut.util.algorithm.support.BubbleSort; g Z3VT{
import org.rut.util.algorithm.support.HeapSort; /BC(O[P
import org.rut.util.algorithm.support.ImprovedMergeSort; xLht6%o*
import org.rut.util.algorithm.support.ImprovedQuickSort; 'A91i
import org.rut.util.algorithm.support.InsertSort; 3UeG>5R
import org.rut.util.algorithm.support.MergeSort; j^A0[:2
import org.rut.util.algorithm.support.QuickSort; Bvx%|:R
import org.rut.util.algorithm.support.SelectionSort; 5=CLR
import org.rut.util.algorithm.support.ShellSort; nA8]/r1k
YpQ/ )fSEV
/** dR2#n
* @author treeroot dtJaQ`
* @since 2006-2-2 X$,#OR
* @version 1.0 2YvhzL[um
*/ 7aTo!T
public class SortUtil { 9k.LV/Y
public final static int INSERT = 1; @+A`n21,O
public final static int BUBBLE = 2; 9:0JWW^so
public final static int SELECTION = 3; yO Cv-zm
public final static int SHELL = 4; `X?l`H;#
public final static int QUICK = 5; 2GRh8G&5
public final static int IMPROVED_QUICK = 6; PN0l#[{EN
public final static int MERGE = 7; [sG=(~BU
public final static int IMPROVED_MERGE = 8; U(5(0r
public final static int HEAP = 9; >O[# 661
k>#,1GbNZy
public static void sort(int[] data) { pE>~F
sort(data, IMPROVED_QUICK); -05zcIVo
} eN]0]9JO
private static String[] name={ s]Z/0:`
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" rlu{C4l
}; >*%ySlZbs
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private static Sort[] impl=new Sort[]{ ji{V#
new InsertSort(), d|Wpub
new BubbleSort(), j6Acd~y\2
new SelectionSort(), Eugt~j3
new ShellSort(), K V^`
new QuickSort(), 2&fIF}vk>m
new ImprovedQuickSort(), vW6Pf^yJ
new MergeSort(), Vf6lu)Zc1
new ImprovedMergeSort(), ehj&A+Ip
new HeapSort() "PGEiLY
}; ==I:>+_^|
DV +DJcF
public static String toString(int algorithm){ #9z\Wblr
return name[algorithm-1]; ry}CND(nB
} Vea>T^
!pl<
public static void sort(int[] data, int algorithm) { h$|K vS
impl[algorithm-1].sort(data); xin<.)!E
} WQ4:='(
4A0R07"
public static interface Sort { Z[KXDQn8
public void sort(int[] data); 7dI+aJ
} SiHZco I
k<ds7k1m
public static void swap(int[] data, int i, int j) { `/ix[:}m^
int temp = data; Fs_V3i3|L
data = data[j]; 4lC:svF
data[j] = temp; Q/4g)(~J
} 1R9hA7y&,/
} LoUi Yf