[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; (.N!(;G
} <T+{)FV
int i1=l; C9L_`[9DO
int i2=mid+1; YK%rTbB(
for(int cur=l;cur<=r;cur++){ nD\H$5>5
if(i1==mid+1) 'o%6TWl9s
data[cur]=temp[i2++]; *m*sg64Zw
else if(i2>r) {W$K@vuV;?
data[cur]=temp[i1++]; ,f^ICM
else if(temp[i1] data[cur]=temp[i1++]; @~8*
else Q%n$IQr4gM
data[cur]=temp[i2++]; HMqR%A
} |VQmB/a
} YuFR*W;$
ndS8p]P&o(
} Js/QL=,
*=zv:!
改进后的归并排序: W(\^6S)
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package org.rut.util.algorithm.support; i6)HC
5]~451
import org.rut.util.algorithm.SortUtil; ]8CgHT[^7
f[wxt n'r
/** '^%kTNn
* @author treeroot ':!aFMj^
* @since 2006-2-2 ?@CbaX~+K
* @version 1.0 ^]MLEr!S
*/ 9nSfFGu
public class ImprovedMergeSort implements SortUtil.Sort { FwUgMR*xq
`k`P;(:
private static final int THRESHOLD = 10; uR6 `@F
ZQ{-6VCjl
/* ym_p49
* (non-Javadoc) ^.PCQ~Ql
* _$i)bJ
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Ug\$Ob5=q
*/ n j2=}6
public void sort(int[] data) { `T{'ufI4B
int[] temp=new int[data.length]; 45rG\$%#
mergeSort(data,temp,0,data.length-1); E8BIb 'b;
} VS@e[,
xZA.<Yd^r
private void mergeSort(int[] data, int[] temp, int l, int r) { [Qcht,\^v
int i, j, k; Q89fXi0Ivb
int mid = (l + r) / 2; ty'/i!/\
if (l == r) HI7w@V8Ed
return; |-L7qZu%
if ((mid - l) >= THRESHOLD) Xw3j(`w$,
mergeSort(data, temp, l, mid); c(aykIVOo
else i` Q&5KL
insertSort(data, l, mid - l + 1); ~;#sj&~
if ((r - mid) > THRESHOLD) w[C*w\A\M
mergeSort(data, temp, mid + 1, r); U7Oa 13Qz
else M.+h3<%^
insertSort(data, mid + 1, r - mid); :C2 @!W z
voQJ!h1
for (i = l; i <= mid; i++) { <cU%yA710
temp = data; nW}jTBu_K+
} LosRjvQ:
for (j = 1; j <= r - mid; j++) { X9ZHYlr+Q
temp[r - j + 1] = data[j + mid]; 83 <CDjD
} RLZfXXMn
int a = temp[l]; ^`k;~4'd
int b = temp[r]; ]|tR8`DGZ%
for (i = l, j = r, k = l; k <= r; k++) { m'QG{f
if (a < b) { ka6E s~
data[k] = temp[i++]; ln+.=U6Tm
a = temp; <ZheWl
} else { iI`vu
data[k] = temp[j--]; iD*Hh-
b = temp[j]; 3!$+N\ #w
} b$yIM
} b.v +5=)B
} UI"UBZZ$
="v`W'Pd
/** 8|^&~Rl4
* @param data {Wi*B(
* @param l ]YtN6Rq/
* @param i a"Xh
*/ } C:i0Q
private void insertSort(int[] data, int start, int len) { 3&CV!+z
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); Z,O*p,Gzn
} [NAfy~X*
} /(*Ucv2i}T
} jXLd#6
} W=3#oX.GsU
Qrt\bz h/}
堆排序： ^ghYi|kQq
S3l^h4
package org.rut.util.algorithm.support; ^C1LQZ
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import org.rut.util.algorithm.SortUtil; kmX9)TMVO
(WJ)!
/** EQ ee5}
* @author treeroot CgmAxcK
* @since 2006-2-2 yvj/u c
* @version 1.0 Y!_{:2H8p
*/ *asv^aFpS
public class HeapSort implements SortUtil.Sort{ 0&j90J$`
W#~7X
/* (non-Javadoc) qFwt^w
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 8QK8q:|
*/ v@tEHRadz
public void sort(int[] data) { !u@P\8M}
MaxHeap h=new MaxHeap(); Er%&y
h.init(data); Lc5zu7ncg
for(int i=0;i h.remove(); Vj9X6u}{
System.arraycopy(h.queue,1,data,0,data.length); A5J41yH
} ;b*qunJ3L
{'tfU
private static class MaxHeap{ +^+'.xQ
NI#]#yM+
void init(int[] data){ d\nXK#)Q
this.queue=new int[data.length+1]; \OtreYi
for(int i=0;i queue[++size]=data; +T@BOYhgq
fixUp(size); O*GF/ R8B
} p|.5;)%|
} On}1&!{1]
wR@>U.XT@
private int size=0; #p@GhI!6
OyVP_Yx,V
private int[] queue; {%G9iOV.
XDJE]2^52?
public int get() { e|!'
return queue[1]; EN\cwa#FU
} H^*AaA9-
d/ ^IL*O
public void remove() { G|KA!q
SortUtil.swap(queue,1,size--); 2I [zV7 @t
fixDown(1); 'Og@<~/Xy
} dhob]8b
file://fixdown <[)-Q~Gg5
private void fixDown(int k) { 0>Snps3*Z
int j; }+n|0xK
while ((j = k << 1) <= size) { dT*Yv`h
if (j < size %26amp;%26amp; queue[j] j++; ;6P>S4`w
if (queue[k]>queue[j]) file://不用交换 T,/rC{
break; ]|tg`*l!>
SortUtil.swap(queue,j,k); aE5-b ub c
k = j; O'wmhLa"W
} XQ}J4J~Vm
} i`2SebDj'w
private void fixUp(int k) { MSQ^ovph
while (k > 1) { o'$"MC+
int j = k >> 1; yO1 7C
if (queue[j]>queue[k]) 1v]%FC`
break; PiKP.
SortUtil.swap(queue,j,k); S4_/%~?
k = j; =WT$\KYGv
} oL@-<;zKO
} C*b[J
Ahwi
} d-_V*rYU
y(Gn+
} ^7spXfSAd
4tZ*%!I'
SortUtil： 6i[Ts0H%<!
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package org.rut.util.algorithm; I@KM2KMN
z)^|.
import org.rut.util.algorithm.support.BubbleSort; rpRyB9
import org.rut.util.algorithm.support.HeapSort; %42a>piev
import org.rut.util.algorithm.support.ImprovedMergeSort; +-@n}xb@
import org.rut.util.algorithm.support.ImprovedQuickSort; |MZ1j(_
import org.rut.util.algorithm.support.InsertSort; T%eBgseS
import org.rut.util.algorithm.support.MergeSort; K|Sq_/#+U
import org.rut.util.algorithm.support.QuickSort; =o##z5j K
import org.rut.util.algorithm.support.SelectionSort; U9:)qvMXe
import org.rut.util.algorithm.support.ShellSort; WY!\^| ,
[nO3%7t@
/** }i~k:kmV
* @author treeroot &|k=mxox\
* @since 2006-2-2 UN.;w3`Oc
* @version 1.0 q~R8<G%YK
*/ z,TH}s6
public class SortUtil { 3@V?L:J
public final static int INSERT = 1; =PRQ3/?5
public final static int BUBBLE = 2; U.<j2Kum
public final static int SELECTION = 3; ,'|J
public final static int SHELL = 4; #<*.{"T
public final static int QUICK = 5; %b^4XTz
public final static int IMPROVED_QUICK = 6; uB I/3aQ
public final static int MERGE = 7; S1|u@d'
public final static int IMPROVED_MERGE = 8; ?wB_fDb}
public final static int HEAP = 9; ,j*9)
Km(i}:6"
public static void sort(int[] data) { xvOz*vM?
sort(data, IMPROVED_QUICK); I8gNg Z
} oK\zyNK
private static String[] name={ Nnh\FaI
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" "'z}oS
}; E5^\]`9P
X hq ss),
private static Sort[] impl=new Sort[]{ @Y/&qpo$#W
new InsertSort(), PGP#$JC
new BubbleSort(), y47N(;vy
new SelectionSort(), ?sk>Mzr
new ShellSort(), 01?+j%k=m/
new QuickSort(), ircF3P>a?
new ImprovedQuickSort(), L(;$(k-/(
new MergeSort(), O^MI073Q>t
new ImprovedMergeSort(), Ok_}d&A
new HeapSort() * 1;4&/93o
}; &gp&i?%X9b
V;%ug'j
public static String toString(int algorithm){ Jo {:]:
return name[algorithm-1]; \78E>(`'
} N#ggT9>X
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public static void sort(int[] data, int algorithm) { %hSQ\T<8[o
impl[algorithm-1].sort(data); C<D$Y,[w
} s/7Z.\
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public static interface Sort { r84^/+"T
public void sort(int[] data); {mJ' Lb0;
} M(a%Qk?]/
e-rlk5k%f
public static void swap(int[] data, int i, int j) { VM%g QOo<
int temp = data; +.!D>U$)}
data = data[j]; *S}@DoXS
data[j] = temp; QCbD^
} t5+p]7
} 1sHjM%