[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; \s<iM2]Kl
} G~4^`[elB
int i1=l; N3r{|Bu
int i2=mid+1; I U4[}x
for(int cur=l;cur<=r;cur++){ ":"M/v%F
if(i1==mid+1) #)>>f
data[cur]=temp[i2++]; <2H0m
else if(i2>r) %DPtK)X1
data[cur]=temp[i1++]; $j{ynh)^
else if(temp[i1] data[cur]=temp[i1++]; [ Q=)f
else sTv/;*
data[cur]=temp[i2++]; 7\a(Imq
} ENJ]
} wqE ]o= k
P). @o.xl
} )CdglPK
p$[*GXR4
改进后的归并排序: 6/@ cP/
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package org.rut.util.algorithm.support; rIge6A>I
*i%!j/QDAP
import org.rut.util.algorithm.SortUtil; 348Bu7':
do=VPqy
/** ]X?+]9Fr
* @author treeroot |.(o4<nx.
* @since 2006-2-2 |nD2k,S<?
* @version 1.0 {,s:vPoiA
*/ 'Q(A5zfN]Y
public class ImprovedMergeSort implements SortUtil.Sort { eIof{#
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private static final int THRESHOLD = 10; Cn28&$:J
L<8y5B~W
/* e|MyA?`
* (non-Javadoc) zy$hDy0
* )\VUAD%~e7
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ,~G _3Oz
*/ CF42KNq
public void sort(int[] data) { y62;&{?m
int[] temp=new int[data.length]; ItOVx!"@9
mergeSort(data,temp,0,data.length-1); 5QSd$J
} `i{o8l
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private void mergeSort(int[] data, int[] temp, int l, int r) { um3 M4>K
int i, j, k; "_#%W oo
int mid = (l + r) / 2; -Qn:6M>w^
if (l == r) 0^["&K/
return; YuPgsJ[m
if ((mid - l) >= THRESHOLD) *[yCcqN.
mergeSort(data, temp, l, mid); YT:<AJm
else wc__g8?'
insertSort(data, l, mid - l + 1); UdL`.D,
if ((r - mid) > THRESHOLD) k9R1E/;
mergeSort(data, temp, mid + 1, r); 1Tiq2+hmf
else pd7FU~-
insertSort(data, mid + 1, r - mid); >Q5 SJZ/
h Qu9ux
for (i = l; i <= mid; i++) { kN]#;R6
temp = data; P'Y8 t
} @KS:d\l}U
for (j = 1; j <= r - mid; j++) { ;WGY)=-gv
temp[r - j + 1] = data[j + mid]; `RmB{qgB
} 9wWjl}%
int a = temp[l]; 4-3B"
int b = temp[r]; |{oKhC^yG
for (i = l, j = r, k = l; k <= r; k++) { uN`ACc)ESi
if (a < b) { *VRFs=
data[k] = temp[i++]; X^xu$d6
a = temp; 4El{2cfA
} else { Q?1 KxD!
data[k] = temp[j--]; O]2h=M@q.
b = temp[j]; **s:H'Mw_
} ^?J:eB!
} 1km=9[;w'
} %0u7pk
#d|.BxH
/** 1^Caz-
* @param data d[$1:V
* @param l ^R<= }
* @param i y"9TS,lmK
*/ le[5a=e(
private void insertSort(int[] data, int start, int len) { &12aI|u^<
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); l0@$]76cX;
} y|lP.N/
} UoKBcarm
} vNtbb]')m
} +ZZiZ&y
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堆排序： CyXcA;H,.
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package org.rut.util.algorithm.support; =3J~Fk
BO[A1'>
import org.rut.util.algorithm.SortUtil; uox;PDK
Y0eu^p)
/** }'X}!_9w>
* @author treeroot `$#64UZ>U1
* @since 2006-2-2 -#Wc@\;
* @version 1.0 -nd6hx
*/ Viw{<VH=
public class HeapSort implements SortUtil.Sort{ T%]: tDa
z$YOV"N
/* (non-Javadoc) (wA|lK3
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) z+\>e~U6J}
*/ ?ke C
public void sort(int[] data) { mGY74>/
MaxHeap h=new MaxHeap(); { aB_t%`w
h.init(data); (sl]%RjGa
for(int i=0;i h.remove(); iu1iO;q
System.arraycopy(h.queue,1,data,0,data.length); _*`AGda
} Y5npz^i
m[8#h(s*t
private static class MaxHeap{ -u9{R\S
|w>DZG!}1-
void init(int[] data){ YWdlE7 y
this.queue=new int[data.length+1]; (PB|.`_<H
for(int i=0;i queue[++size]=data; U>I#f
fixUp(size); 9B%"7MVn
} ipyO&v
} .#}SK!"B
>5N}ZIN
private int size=0; |mM7P^I
h\ybh
private int[] queue; z1:auodI@
( Rf)&KN
public int get() { %%3ugD5i!
return queue[1]; Em?skUnG,
} /JfXK$`
k1cBMDSokO
public void remove() { >:Oo[{)
SortUtil.swap(queue,1,size--); gM=~dBz
fixDown(1); fcBSs\\C~
} y1AS^'
file://fixdown ^1nf|Xj[
private void fixDown(int k) { >H%8~ Oek
int j; #".{i+3E
while ((j = k << 1) <= size) { aY?}4Bx
if (j < size %26amp;%26amp; queue[j] j++; P$oa6`%l
if (queue[k]>queue[j]) file://不用交换 oC?b]tzj
break; #?,cYh+
SortUtil.swap(queue,j,k); ']rh0?
k = j; :@3d
} "vJADQ4F
} Nyo6R9^
private void fixUp(int k) { vLC&C-f
while (k > 1) { zzx4;C",u
int j = k >> 1; [NFAdE
if (queue[j]>queue[k]) ~/.&Z`ls
break; Y}[r`}={
SortUtil.swap(queue,j,k); Fd91Y
k = j; FUOvH85f
} N0Y!
} [n^___7
npe*A
} &=UzF
2n7[Op
} md2kZ.5u
}i[jJb`bY
SortUtil： c8Opc"UE
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package org.rut.util.algorithm; Ay_<?F+&
Gm%[@7-
import org.rut.util.algorithm.support.BubbleSort; K0#tg^z5d
import org.rut.util.algorithm.support.HeapSort; 0I&rZMpF&
import org.rut.util.algorithm.support.ImprovedMergeSort; "8rP?B(
import org.rut.util.algorithm.support.ImprovedQuickSort; ILpB:g
import org.rut.util.algorithm.support.InsertSort; J|b1 K]
import org.rut.util.algorithm.support.MergeSort; (sl~n_<ds8
import org.rut.util.algorithm.support.QuickSort; T S.lFg:K
import org.rut.util.algorithm.support.SelectionSort; Rza\n8
import org.rut.util.algorithm.support.ShellSort; {P3,jY^
4+~+`3;~v
/** yA_d${n
* @author treeroot DUtpd|
* @since 2006-2-2 #}gc6T~0
* @version 1.0 ox*Ka]
*/ |~/{lE=I
public class SortUtil { 6`s[PKP.
public final static int INSERT = 1; r*$"]{m}
public final static int BUBBLE = 2; k^L (q\D
public final static int SELECTION = 3; jC@^/rMh
public final static int SHELL = 4; l)|CPSN?w
public final static int QUICK = 5; vB,N6~r>
public final static int IMPROVED_QUICK = 6; 6SmSu\lgV
public final static int MERGE = 7; :[rx|9M6
public final static int IMPROVED_MERGE = 8; 'X?`+2wK
public final static int HEAP = 9; o+vf
YnMph0\Y^
public static void sort(int[] data) { bw[!f4~
sort(data, IMPROVED_QUICK); >i.+v[)#
} 8R z=)J
private static String[] name={ #eaey+~
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" f(C0&"4e
}; h>n;A>k@N
Y'Af I^K
private static Sort[] impl=new Sort[]{ " c]Mz&z
new InsertSort(), 3HA{18{4uP
new BubbleSort(), 2D!'7ZD
new SelectionSort(), 5M(?_qj
new ShellSort(), FxUH?%w
new QuickSort(), SAoqq
new ImprovedQuickSort(), ^\CQWgY(
new MergeSort(), (&B & V
new ImprovedMergeSort(), b)V[d8IA
new HeapSort() Gq{v)iN
}; 0s8S`hCn>
oYF8:PYB
public static String toString(int algorithm){ bZi>
return name[algorithm-1]; tQ/w\6{
} mI.*b(Irp
@-m&X2J+c
public static void sort(int[] data, int algorithm) { GM%|mFqeu
impl[algorithm-1].sort(data); ]juXm1)>W1
} F3qi$3HM
6Ym[^U
public static interface Sort { JvUKfsnu{
public void sort(int[] data); &x;nP6mV
} ,Bta)
ZNUV Bi
public static void swap(int[] data, int i, int j) { o+nU{
int temp = data; s9Xeh"
data = data[j]; k/LV=e7
data[j] = temp; -0kwS4Hx2
} w7 QIKsI0
} @NVq .z