[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; JaR!9GVN7
} 1D2RhM%
int i1=l; uKTYb#E7
int i2=mid+1; 6ZwQ/~7H
for(int cur=l;cur<=r;cur++){ nEP3B'+
if(i1==mid+1) _mQj=
data[cur]=temp[i2++]; /1m+iM^V
else if(i2>r) E(z|LS*3
data[cur]=temp[i1++]; kpy)kS
else if(temp[i1] data[cur]=temp[i1++]; /!.]Y8yEH
else EP90E^v^
data[cur]=temp[i2++]; Nx+5rp
} XF>!~D
} 5Q:49S47
t\PSB
} (WP^}V5
c/=\YeR
改进后的归并排序: EY.m,@{
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package org.rut.util.algorithm.support; pAaNWm
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import org.rut.util.algorithm.SortUtil; b\kA
kIe)ocJg
/** -G#m'W&
* @author treeroot Eg2SC?5
* @since 2006-2-2 {lUaN0O:
* @version 1.0 Z0v&AD=
*/ &T ^bv*P
public class ImprovedMergeSort implements SortUtil.Sort { ]3Ibl^J
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private static final int THRESHOLD = 10; E70o nR!i
b_u; `^
/* bA'N2~.,
* (non-Javadoc) hSN38wy
* ^4p$@5zH
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 91nB?8ZE6,
*/ s$lJJL
public void sort(int[] data) { ($8!r|g5#
int[] temp=new int[data.length]; 4Me3{!HJz
mergeSort(data,temp,0,data.length-1); )T&r770
} $" =3e]<
ka{!' ^
private void mergeSort(int[] data, int[] temp, int l, int r) { wbk$(P'gN
int i, j, k; h2= wC.
int mid = (l + r) / 2; [@3.dd
if (l == r) ]US!3R^
return; AM#s2.@
if ((mid - l) >= THRESHOLD) :QHh;TIG=<
mergeSort(data, temp, l, mid); ,g3n/'rP%
else !/!Fc'A
insertSort(data, l, mid - l + 1); r^ '
if ((r - mid) > THRESHOLD) RMid}BRE
mergeSort(data, temp, mid + 1, r); DK'S4%;Sp
else \C2HeA\#SW
insertSort(data, mid + 1, r - mid); Gv[(0
Y:Jgr&*,z
for (i = l; i <= mid; i++) { dQAF;L
temp = data; {Q`Q2'@
} 4af^SZ)l
for (j = 1; j <= r - mid; j++) { `D$RL*C;M`
temp[r - j + 1] = data[j + mid]; j0n.+CO-{
} )(c%QWz
int a = temp[l]; |TF6&$>d
int b = temp[r]; !kH 1|
for (i = l, j = r, k = l; k <= r; k++) { 0,8RA_Ca}
if (a < b) { C~nL3w
data[k] = temp[i++]; 3{Zd<JYg4-
a = temp; ZsYY)<n
} else { l&mY}k
data[k] = temp[j--]; ~jz51[{v
b = temp[j]; ~EvGNnTL
} 9Sa6v?sRor
} xK5~9StP
} 6TXTJ]er
7&w[h4Lw
/** n;:C{5
* @param data =rkW325O
* @param l g@>93j=cZU
* @param i myd:"u,}9
*/ nyOmNvZf
private void insertSort(int[] data, int start, int len) { PeLzZ'$D
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); (B?ZUXM,
} m& D#5C
} vTWm_ed+^
} Bo'v!bI7
} 5aXE^.`
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堆排序： 6['o^>\}f
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package org.rut.util.algorithm.support; #>sIXY
u%=2g'+)_
import org.rut.util.algorithm.SortUtil; 8_O?#JYi
ov >5+"q)
/** ~8-xj6^
* @author treeroot $'::51
* @since 2006-2-2 _~}2@&*G"
* @version 1.0 J: I@kM
*/ h}DKFrHW;-
public class HeapSort implements SortUtil.Sort{ S&D8Rao5
N&|,!Cu
/* (non-Javadoc) SDk^fTV8x
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) {M\n
*/ ;0uiO.
public void sort(int[] data) { 8kE3\#);\
MaxHeap h=new MaxHeap(); l?Ibq}[~
h.init(data); "3_GFq
for(int i=0;i h.remove(); c'5ls7?}O{
System.arraycopy(h.queue,1,data,0,data.length); 1S yG
} :YLurng/]
O]j<$GG!
private static class MaxHeap{ d b*J
#3A|Z=,5
void init(int[] data){ *D1vla8
this.queue=new int[data.length+1]; 1(e64w@
for(int i=0;i queue[++size]=data; L@ejFXQg
fixUp(size); \Xr*1DI<
} jx ?"`;a
} IlB*JJnl
o1-_BlZ
private int size=0; 2h)Qz+|7
}KEr@h,N
private int[] queue; )#`&[9d-
>Pvz5Hf/wW
public int get() { ;krIuk-
return queue[1]; h R6Pj"@0
} Ry?f; s
~mv5{C
public void remove() { N:Ir63X*#
SortUtil.swap(queue,1,size--); ksUF(lYk
fixDown(1); Q^* 33
} .>LJ(Sx9b
file://fixdown Z'|k M!
private void fixDown(int k) { \l`{u)V
int j; bL+}n8B
while ((j = k << 1) <= size) { Q\btl/?
if (j < size %26amp;%26amp; queue[j] j++; Wr'1Y7z
if (queue[k]>queue[j]) file://不用交换 tZu1jBO_Q4
break; i)$<j!L
SortUtil.swap(queue,j,k); Wv~&Qh}
k = j; b #Llu$
} Lg|d[*;'7
} /w2-Pgm-[\
private void fixUp(int k) { ,lFp4C
while (k > 1) { m1xR uj]
int j = k >> 1; 'ud[#@2
if (queue[j]>queue[k]) QbY@{"" `
break; FPM l;0{
SortUtil.swap(queue,j,k); Iv*u#]{t
k = j; wzBI<0]z
} QGE0pWL-a
} sa"}9IE*8
\0&F'V
} Sl@Ucc31
z<.?8bd
} Jb-.x_Bf
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SortUtil： ^`Hb7A(
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package org.rut.util.algorithm; #7/39zTK
Ds#BfP7a
import org.rut.util.algorithm.support.BubbleSort; ,J:Ro N_:
import org.rut.util.algorithm.support.HeapSort; t+{vbS0
import org.rut.util.algorithm.support.ImprovedMergeSort; '|<S`,'#hg
import org.rut.util.algorithm.support.ImprovedQuickSort; &:1q3gDm
import org.rut.util.algorithm.support.InsertSort; usC$NVdm
import org.rut.util.algorithm.support.MergeSort; '}"&JO~vPj
import org.rut.util.algorithm.support.QuickSort; S0}=uL#dt
import org.rut.util.algorithm.support.SelectionSort; \1QY=}
import org.rut.util.algorithm.support.ShellSort; *kEzGgTzoS
8DM! ]L
/** ?nq%'<^^
* @author treeroot @[Q`k=h$
* @since 2006-2-2 ydAiH*>
* @version 1.0 `PSjkF(
*/ 2<n@%'OQp
public class SortUtil { aPQxpK?
public final static int INSERT = 1; qv'w 7T
public final static int BUBBLE = 2; [+!&iN
public final static int SELECTION = 3; E>`|?DE@
public final static int SHELL = 4; $g/h=w@
public final static int QUICK = 5; ?nWzJ5w3
public final static int IMPROVED_QUICK = 6; 3xiDt?&H
public final static int MERGE = 7; g(,^';j
public final static int IMPROVED_MERGE = 8; n|KYcU#
public final static int HEAP = 9; U.JE \/
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public static void sort(int[] data) { 4IvT}Us#+
sort(data, IMPROVED_QUICK); n 8 K6m(
} nd7g8P9p
private static String[] name={ a,r B7aD
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" w4M;e;8m[U
}; p<,`l)o}~
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private static Sort[] impl=new Sort[]{ +_+j"BT
new InsertSort(), g4952u
new BubbleSort(), =itQ@``r
new SelectionSort(), / :6|)AW.{
new ShellSort(), ]hoq!:>M1
new QuickSort(), e[0"x.gu
new ImprovedQuickSort(), `csZ*$7
new MergeSort(), ga(k2Q;y
new ImprovedMergeSort(), *ZxurbX#
new HeapSort() }r!hm?e
}; q6<P\CSHy<
P,F eF'J^
public static String toString(int algorithm){ -4P `:bF
return name[algorithm-1]; o{^`Y
} KHgn
+C[g>c}d
public static void sort(int[] data, int algorithm) { vm'ZA7f6
impl[algorithm-1].sort(data); S>S7\b'
} 9y<h.T
-4zV yW S<
public static interface Sort { L"n)fe$
public void sort(int[] data); 6U.|0mG[
} v+8Ybq
K1Uq`TJ
public static void swap(int[] data, int i, int j) { L(sT/
int temp = data; ;{q*
data = data[j]; PB?2{Cj
data[j] = temp; c&FOt
} !a-B=pn!]
} Bv'%$}}-