[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; ydRC1~f0
} 9l,a^@Y:
int i1=l; ?=m?jNa;nC
int i2=mid+1; tg]x0#@s
for(int cur=l;cur<=r;cur++){ 26&'X+n&
if(i1==mid+1) l&iq5}[n&
data[cur]=temp[i2++]; s7Ub@
else if(i2>r) 6f')6X'x
data[cur]=temp[i1++]; "j;4 k.`h
else if(temp[i1] data[cur]=temp[i1++]; )M6w5g
else Q8!)!r%
data[cur]=temp[i2++]; $hivlI-7Ko
} #wL
} OQW#a[=WQ
T}V!`0vKw
} M`rl!Ci#
91=OF*w
改进后的归并排序: TT=b79k
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package org.rut.util.algorithm.support; Fa'k0/_j
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import org.rut.util.algorithm.SortUtil; [0"'T[ok
Llr>9(|
/** Vn*tpbz
* @author treeroot > ;/l)qk,
* @since 2006-2-2 Zt.'K(]2h
* @version 1.0 Y. ,Kl~
*/ j@YU|-\qh
public class ImprovedMergeSort implements SortUtil.Sort { sZx/Ee
X!e[GJ
private static final int THRESHOLD = 10; $5Xh,DOg
#Q2Y&2`yGT
/* Y.g59X!Ub2
* (non-Javadoc) J]nohICe
* uc;8 K,[t
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) n4}Br;%
*/ ?b(=1S\E'^
public void sort(int[] data) { ?VP8ycm
int[] temp=new int[data.length]; N5a*7EJv+
mergeSort(data,temp,0,data.length-1); ?OkWe<:4
} sBr_a5QQ#
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private void mergeSort(int[] data, int[] temp, int l, int r) { o4|M0
int i, j, k; !o:f$6EA~C
int mid = (l + r) / 2; ]H`1F1=
if (l == r) RhncBKm*M
return; Ney/[3 A
if ((mid - l) >= THRESHOLD) 8C*c{(4
mergeSort(data, temp, l, mid); SHe49!RA'{
else ^s|6vd;PD=
insertSort(data, l, mid - l + 1); S:h{2{
if ((r - mid) > THRESHOLD) xai*CY@cQ
mergeSort(data, temp, mid + 1, r); _f$^%?^
else YB-h.1T-
insertSort(data, mid + 1, r - mid); d3D] k,
\ExMk<y_&
for (i = l; i <= mid; i++) { r"P|dlV-
temp = data; KET2Ws[w
} r>o63Q:
for (j = 1; j <= r - mid; j++) { 0*f)=Q'
temp[r - j + 1] = data[j + mid]; [ucpd
} '.:z&gSqx0
int a = temp[l]; 6}d.5^7lr
int b = temp[r]; o,_?^'@
for (i = l, j = r, k = l; k <= r; k++) { E*]bgD7V
if (a < b) { a{L d
data[k] = temp[i++]; Xu%'Z".>:
a = temp; MF5[lK9e
} else { wB.&}p9p
data[k] = temp[j--]; 0yD9SJn
b = temp[j]; k?+?v?I =
} .yz}ROmN^
} E=nIRG|g
} vSEuk}pk
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/** 4 o Fel.o
* @param data <0Xf9a8>
* @param l \W~N
* @param i sB7# ~pA
*/ Zy`m!]G]80
private void insertSort(int[] data, int start, int len) { h1de[q)
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); A1O'|7X
} MN\HDKN
} 4K\G16'$v
} 8Vr%n2M
} o~`/_+
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堆排序： \NPmym_6J
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package org.rut.util.algorithm.support; 4h|c<-`>t
pR=@S>!|
import org.rut.util.algorithm.SortUtil; Z?h~{Mg
Ayxkv)%:@)
/** 6^]+[q}3
* @author treeroot !|^|,"A)
* @since 2006-2-2 b3=rG(0f
* @version 1.0 8A##\j)
*/ vS;RJg=
public class HeapSort implements SortUtil.Sort{ %)1y AdG 8
CsGx@\jN
/* (non-Javadoc) v[1aWv:
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) !>FYK}c7
*/ G<65H+)M\
public void sort(int[] data) { >qnko9V
MaxHeap h=new MaxHeap(); wW>A_{Y
h.init(data); d;boIP`M;
for(int i=0;i h.remove(); s6 uG`F"
System.arraycopy(h.queue,1,data,0,data.length); LSL/ZvSP
} akp-zn&je
=$'6(aDH
private static class MaxHeap{ f6hnTbJ
h4fJvOk|!
void init(int[] data){ p`olCp'
this.queue=new int[data.length+1]; lXW%FH6c+
for(int i=0;i queue[++size]=data; wr$("A(
fixUp(size); oH97=>
} 3lrT3a3vV
} 11Q1AN
Ag-(5:
private int size=0; Ni9/}bb
<? q?Mn
private int[] queue; YvaK0p0Z
"H'B*vc-
public int get() { J!dm-L
return queue[1]; D+lAhEN
} .s?L^Z^
#NEE7'&S
public void remove() { L>jY.d2w=K
SortUtil.swap(queue,1,size--); ]C!gQq2'a
fixDown(1); u-QB.iQ+s
} ha]VWt%}
file://fixdown ]E5o1eeg
private void fixDown(int k) { WlOmJtt4)
int j; |3(' N#|
while ((j = k << 1) <= size) { 1+_`^|eK
if (j < size %26amp;%26amp; queue[j] j++; )1?y 8_B
if (queue[k]>queue[j]) file://不用交换 f z'@_4hg
break; LBw1g<&
SortUtil.swap(queue,j,k); ^pp\bVh2Q]
k = j; Z9v31)q(
} ~[t[y~Hup
} zfJT,h-{
private void fixUp(int k) { b6,iZ+]
while (k > 1) { Z@4Arfl
int j = k >> 1; `'DmDg
if (queue[j]>queue[k]) 5AFJC?
break; k =>oO9`
SortUtil.swap(queue,j,k); .YtKS
k = j; w'>pY
} R$R*'l
} !z\h|wU+
\1k79c
} Hus)c3Ty7
'{cIAw/"n
} E^B'4
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SortUtil： (>LF(ll
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package org.rut.util.algorithm; Yj&F;_~
)v'WWwXY>
import org.rut.util.algorithm.support.BubbleSort; 0_jf/an,%
import org.rut.util.algorithm.support.HeapSort; LP.]9ut
import org.rut.util.algorithm.support.ImprovedMergeSort; .yoH/2h
import org.rut.util.algorithm.support.ImprovedQuickSort; k$n|*kCh
import org.rut.util.algorithm.support.InsertSort; fW?vdYF
import org.rut.util.algorithm.support.MergeSort; 1.}d.t
import org.rut.util.algorithm.support.QuickSort; |Tv#4st
import org.rut.util.algorithm.support.SelectionSort; pIc#L>{E
import org.rut.util.algorithm.support.ShellSort; KYB`D.O
s n8Qk=K
/** lov!o:dJ
* @author treeroot &)QX7*H
* @since 2006-2-2 Na<pwC
* @version 1.0 xB@ T|EP
*/ " s,1%Ltt
public class SortUtil { GV1pn) 4
public final static int INSERT = 1; esJ~;~[@(r
public final static int BUBBLE = 2; v&6-a*<Z
public final static int SELECTION = 3; 8'[~2/
public final static int SHELL = 4; 5tl< 3g`
public final static int QUICK = 5; -M\<nx
public final static int IMPROVED_QUICK = 6; 4j-Xi
public final static int MERGE = 7; d9k0F OR1
public final static int IMPROVED_MERGE = 8; zrvF]|1UP
public final static int HEAP = 9; 1a/++4O.|
YX!iL6?~
public static void sort(int[] data) { N"Z{5A
sort(data, IMPROVED_QUICK); G?yLo 'Ulo
} irZ])a
private static String[] name={ %[GsD9_-
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" ,>:U2%
}; 2_>N/Z4T
W<'m:dq
private static Sort[] impl=new Sort[]{ 91/Q9xY
new InsertSort(), Q1Kfi8h}'
new BubbleSort(), kBS9tKBWg
new SelectionSort(), sWhZby7
new ShellSort(), xH ]Ct~md
new QuickSort(), r-,%2y?
new ImprovedQuickSort(), <]ox;-56
new MergeSort(), s9mx
new ImprovedMergeSort(), p#-Z4-`
new HeapSort() rm7ANMB:
}; [z:!j$K
&0d#Y]D4`
public static String toString(int algorithm){ b1cy$I
return name[algorithm-1]; #`^}PuQ
} (&r.w
[+^1.N
public static void sort(int[] data, int algorithm) { juJklSD
impl[algorithm-1].sort(data); {FI&^39 F$
} cTifC1Pf
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public static interface Sort { =F|{#F
public void sort(int[] data); /'SNw?&
} R*,MfV
@NR>{Eg
public static void swap(int[] data, int i, int j) { .'6gZKXY
int temp = data; 7g^]:3f!
data = data[j]; XPc^Tq
data[j] = temp; Lj({[H7D!
} PI {bmZ
} RU|Q]Ymx