[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; 83~9Xb=!\
} O\;R (
int i1=l; 9pY`_lxa>
int i2=mid+1; @ckOLtxE>
for(int cur=l;cur<=r;cur++){ @)hrj2Jw
if(i1==mid+1) RlW7l1h&
data[cur]=temp[i2++]; A~Uqw8n$\
else if(i2>r) \7l%@
data[cur]=temp[i1++]; &uX|Ksq
else if(temp[i1] data[cur]=temp[i1++]; cwK+{*ZH/
else ;`p!/9il
data[cur]=temp[i2++]; %+Az X
} %BV2 q
} )'pc1I
?A]@$
} c+_F}2)
'5:P,1tWU
改进后的归并排序: 6e%|.}U
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package org.rut.util.algorithm.support; yEvuTgDv
DnY7$']"|
import org.rut.util.algorithm.SortUtil; PNn-@=%
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/** B^{87YR
* @author treeroot +0)zB;~7
* @since 2006-2-2 F~qiNV
* @version 1.0 (";{@a %
*/ d7O\p(M1
public class ImprovedMergeSort implements SortUtil.Sort { F|ib=_)3
$IdY(f:.:5
private static final int THRESHOLD = 10; wlY6h4c
E\ 'X|/$a
/* ab5uZ0@
* (non-Javadoc) _jhdqON6E
* Vv]81y15Q;
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) q%^vx%aL\
*/ MZ/PXY
public void sort(int[] data) { 74hQ?Atw:
int[] temp=new int[data.length]; $AI0&#NM
mergeSort(data,temp,0,data.length-1); "q'9-lk
} -4}I02
Z T5p
private void mergeSort(int[] data, int[] temp, int l, int r) { 6Eu&%`
int i, j, k; @Z50S 8
int mid = (l + r) / 2; s</llJ$
if (l == r) -_>g=a@&
return; !edgziuO
if ((mid - l) >= THRESHOLD) Sn_zhQxG
mergeSort(data, temp, l, mid); Ob|[/NN
else l:Y$A$W]>
insertSort(data, l, mid - l + 1); [;]@PKW?w
if ((r - mid) > THRESHOLD) JN{xh0*
mergeSort(data, temp, mid + 1, r); _tGR:E
else e1k\:]6
insertSort(data, mid + 1, r - mid); cuw3}4m%
INHN=KY{
for (i = l; i <= mid; i++) { o}iqLe\
temp = data; s\-^vj3
} N$jI&SI?}
for (j = 1; j <= r - mid; j++) { [xVE0l*\
temp[r - j + 1] = data[j + mid]; ;7F|g
} H$ sNp\[{
int a = temp[l]; 4]\t6,Cz8
int b = temp[r]; 9hG+?
for (i = l, j = r, k = l; k <= r; k++) { YBX7WZCR
if (a < b) { i"rrM1/r
data[k] = temp[i++]; !`VO#_TJ
a = temp; &M,"%w!
} else { BBg&ZIYEh
data[k] = temp[j--]; F[ Itq
b = temp[j]; P'nbyF
} 9t$%Tc#Z
} yk5T"#'+
} }UzO_&Z#6
<IF\;,.c
/** jZ'y_
* @param data <N{pMz
* @param l iZ`1Dzxgk
* @param i us.+nnd
*/ N1V qK
private void insertSort(int[] data, int start, int len) { wFW2m
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); Efb S*f5
} P7Th94
} WAj26";M(
} {,5=U@J
} }}GBCXAf_
'z#{'`$a
堆排序： (VPT% l6
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package org.rut.util.algorithm.support; q5$z:'zE
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import org.rut.util.algorithm.SortUtil; vWJhSpC[
5T[9|zJs
/** 328(W
* @author treeroot ':7%@2Zo
* @since 2006-2-2 Q7y6</4f
* @version 1.0 Z?%j5G=4w
*/ nI4xK
public class HeapSort implements SortUtil.Sort{ T#lySev
Kis\Rg
/* (non-Javadoc) u1 uu_*
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Bx&.Tj
*/ J3sO%4sYR
public void sort(int[] data) { k3m|I*_\L
MaxHeap h=new MaxHeap(); p6V`b'*>
h.init(data); f77uqv(Y
for(int i=0;i h.remove(); *it(o
System.arraycopy(h.queue,1,data,0,data.length); ];P^q`n=.
} Ih}I`wY-
K/~+bq#+
private static class MaxHeap{ Zq|oj^
yaf&SR@7k{
void init(int[] data){ @1#$
this.queue=new int[data.length+1]; vf@d(g
for(int i=0;i queue[++size]=data; sz.(_{5!
fixUp(size); @o+T<}kWX
} SnbH`\U"
} (k"oV>a|
KJa?TwnC
private int size=0; GLb}_-|
;G.m;5A
private int[] queue; g<s[6yA
*@Z/L26s;=
public int get() { `4cs.ab
return queue[1]; r'hr'wZ
} #R|M(Z">q
n=RAE^[M
public void remove() { &7 }!U
SortUtil.swap(queue,1,size--); OwP9=9};
fixDown(1); L%a ni}V
} tg~&kaz
file://fixdown 66=6;77
private void fixDown(int k) { E{r_CR+8
int j; 'uUp1+
while ((j = k << 1) <= size) { v@k62@;
if (j < size %26amp;%26amp; queue[j] j++; ~?vm97l
if (queue[k]>queue[j]) file://不用交换 :~^ec|tp
break; qy@gW@IU
SortUtil.swap(queue,j,k); [E(DGt
k = j; -p>KFHj6
} ewgcpV|spn
} @2 dp5
private void fixUp(int k) { asR6,k
while (k > 1) { XJ]MPiXj
int j = k >> 1; >b-rAO\{}
if (queue[j]>queue[k]) UD*#!H
break; @Qx|!%
SortUtil.swap(queue,j,k); d@"eWvnlZ
k = j; -!MDYj+U
} 8Es]WR5 ^
} b]s=Uv#)
mW 5L;>
} w;' F;j~
;,'!
} kTex>1W;
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SortUtil： 3h"; 2
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package org.rut.util.algorithm; m7kDxs(KO
U:MkA(S%c
import org.rut.util.algorithm.support.BubbleSort; <_ */
import org.rut.util.algorithm.support.HeapSort; )?pin|_x
import org.rut.util.algorithm.support.ImprovedMergeSort; hzPx8sO
import org.rut.util.algorithm.support.ImprovedQuickSort; 5vYh~|
import org.rut.util.algorithm.support.InsertSort; "h7-nwm
import org.rut.util.algorithm.support.MergeSort; hC]c =$=7
import org.rut.util.algorithm.support.QuickSort; jjvm<;lv
import org.rut.util.algorithm.support.SelectionSort; .,,?[TI
import org.rut.util.algorithm.support.ShellSort; D +)6#i Y
S:vv*5
/** {H $\,
* @author treeroot dqUhp_f2qK
* @since 2006-2-2 F4Ft~:a
* @version 1.0 U3lr<(r*
*/ |i?AtOt@f
public class SortUtil { p`1d'n[
public final static int INSERT = 1; |gxU;"2`5~
public final static int BUBBLE = 2; 6FSw_[)
public final static int SELECTION = 3; .2 UUU\/5
public final static int SHELL = 4; ~A8lvuw3
public final static int QUICK = 5; vG\]xM'u
public final static int IMPROVED_QUICK = 6; w}NgFrL
public final static int MERGE = 7; A i9*w?C
public final static int IMPROVED_MERGE = 8; ^Sy\<
public final static int HEAP = 9; l$,l3
2t[c^J
public static void sort(int[] data) { g,y`[dr
sort(data, IMPROVED_QUICK); )\^o<x2S
} :v{$]wg
private static String[] name={ #TW$J/Jb
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 9z'</tJ`
}; 6{azzk8
K^{`8E&A
private static Sort[] impl=new Sort[]{ Cqg}dXn'
new InsertSort(), 2y_rsu\
new BubbleSort(), J~gfMp.
new SelectionSort(), f`A
new ShellSort(), r-N2*uYtu
new QuickSort(), f,M$>!$V
new ImprovedQuickSort(), _5U Fml9
new MergeSort(), bvG").8$
new ImprovedMergeSort(), &v4w3'@1
new HeapSort() #yr19i ?
}; |J(]
mu"]B]
public static String toString(int algorithm){ .j}u'!LKul
return name[algorithm-1]; Rdt8jY6F/
} h*%T2
&p;};n
public static void sort(int[] data, int algorithm) { Q^MB%L;D
impl[algorithm-1].sort(data); c_ygwO3.Q
} }lpcbm
niy@'
public static interface Sort { Vg \-^$
public void sort(int[] data); a _
} i+&="Z@
~d5"<`<^o
public static void swap(int[] data, int i, int j) { _\]D<\St
int temp = data; z(\H.P#
data = data[j]; 3sp*.dk
data[j] = temp; {f^30Fw
} )7j"OE
} E 3I'3