[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; iiehrK&T!
} DrV0V .t,
int i1=l; |?|K\UF(Y
int i2=mid+1; 0i_
for(int cur=l;cur<=r;cur++){ b7qnOjC
if(i1==mid+1) Ix4jof6(
data[cur]=temp[i2++]; !a)s`
else if(i2>r) xrX?ZJ
data[cur]=temp[i1++]; Dwk$CJb3-
else if(temp[i1] data[cur]=temp[i1++]; @C<d2f|8
else \ j x0ZHR
data[cur]=temp[i2++]; I<9n(rA
} ){jqfkL
} D;J|eC>^
Vy&f"4~
} G$S1#F -
cC'^T6
改进后的归并排序: zdT->%
Y"s )u7
package org.rut.util.algorithm.support; 8t--#sDy{0
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import org.rut.util.algorithm.SortUtil; @qpYDnJ:
JYl\<Z' {
/** ,Os7T 1>
* @author treeroot 9DY|Sa]#=
* @since 2006-2-2 0\ZaMu #
* @version 1.0 wFn@\3%l`
*/ AE]i V{p
public class ImprovedMergeSort implements SortUtil.Sort { )fy<P;g
~t$mw,
private static final int THRESHOLD = 10; A&;EV#]ge
hq]xmM?&
/* a$laRtId7
* (non-Javadoc) 3a/[."W u
* #efqG=q
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) %h3L
*/ jaL$LJV
public void sort(int[] data) { X9z:D>
int[] temp=new int[data.length]; %e(9-M4*
mergeSort(data,temp,0,data.length-1); k62$:9`5
} QR|XV%$
/kAwe *)
private void mergeSort(int[] data, int[] temp, int l, int r) { Q*,6X*W!~
int i, j, k; b-,]A2.
int mid = (l + r) / 2; zZ<ns+h
if (l == r) f<) Ro$
return; (0X,Qwx
if ((mid - l) >= THRESHOLD) _+}-H'7=
mergeSort(data, temp, l, mid); <!$dp9y.
else 'MSEki67
insertSort(data, l, mid - l + 1); ze*&*csO
if ((r - mid) > THRESHOLD) RCoeJ|
mergeSort(data, temp, mid + 1, r); Kp$_0
else D9e+
insertSort(data, mid + 1, r - mid); Zj:a-=
$^!a`Xr
for (i = l; i <= mid; i++) { u'#`yTB6b
temp = data; uDpf2(>s
} 87&KQ_
for (j = 1; j <= r - mid; j++) { RI#lI~&)
temp[r - j + 1] = data[j + mid]; )PsN_ 42~
} XKpL4]{&q4
int a = temp[l]; m]{<Ux
int b = temp[r]; )RpqZe/h4
for (i = l, j = r, k = l; k <= r; k++) { oqm
if (a < b) { L`<T'3G
data[k] = temp[i++]; `wP/Zp{Hy
a = temp; <GbnPG?
} else { W?SP .-I
data[k] = temp[j--]; HVtr,jg
b = temp[j]; R-=_z6<
} E1$Hu{
} 5xG|35Pj
} M"k3zK,
D{Hh#x8Y
/** ^zBjG/'7
* @param data bEVO<x+
* @param l e{^:/WcYB
* @param i P-/XYZ]`
*/ Z?!JV_K
private void insertSort(int[] data, int start, int len) { {m?K2]](
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); B"pFJ"XR
} Vy?R/ Uu
} r78u=r
} }:,o Y<
} "R@$Wu53|
m_{%tU;N
堆排序： A^}i^
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package org.rut.util.algorithm.support; 3K=q)|
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import org.rut.util.algorithm.SortUtil; v>x {jZkFL
m;;0 Cl
/** 4jC4X*
* @author treeroot >%PL_<Vbv
* @since 2006-2-2 [dSDg2]
* @version 1.0 [4K9|/J
*/ <3i4NXnL2
public class HeapSort implements SortUtil.Sort{ I_"Hgx<
-13P 2<i+
/* (non-Javadoc) rW=k%# p
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) hQd@bN8
*/ }}4sh5z
public void sort(int[] data) { 4yJ*85e]
MaxHeap h=new MaxHeap(); (T>?8K_d
h.init(data); FUW(>0x?
for(int i=0;i h.remove(); .IW_DM-
System.arraycopy(h.queue,1,data,0,data.length); X/- W8
} Z@>=&
STFQ";z$
private static class MaxHeap{ ain#_H
#{)r*"%
void init(int[] data){ !I~C\$^U
this.queue=new int[data.length+1]; 0Y38T)k
for(int i=0;i queue[++size]=data; 7dM6;`V^
fixUp(size); &;~2sEo,
} X]&;8
} RTPq8S"
Ef,7zKG
private int size=0; q 2_N90u
&viwo}ls0
private int[] queue; %v`-uAy:
uv~qK:Nw(
public int get() { /el["l
return queue[1]; B"?+5A7
} !i~x"1
g~ppPAH
public void remove() { n,Yr!W:h
SortUtil.swap(queue,1,size--); oUKBb&&O
fixDown(1); ^hl]s?"3
} g|v1qfK
file://fixdown BdE`p{
private void fixDown(int k) { cKi^C
int j; p,[XT`q^
while ((j = k << 1) <= size) { (^s&M
if (j < size %26amp;%26amp; queue[j] j++; m p|20`go
if (queue[k]>queue[j]) file://不用交换 He0N
break; `\RX~ $^
SortUtil.swap(queue,j,k); nyl8=F:V
k = j; 3gPD(r1g
} $p}~,Kp/
} .@8m\
private void fixUp(int k) { %X0NHta~@
while (k > 1) { l~Ie#vak
int j = k >> 1; 9A*?E
if (queue[j]>queue[k]) <.AC=4@V
break; YjX!q]56
SortUtil.swap(queue,j,k); ; $ ?jR c
k = j; oM18aR&
} #iRyjD
} @o3R`ZgC]\
c:@OX[##
} ]9KQP-p'
cAKoPU>U
} v0hfY
}`<>$2b
SortUtil： >XXMIz:
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package org.rut.util.algorithm; Kl46CZs#8
HM$`z"p5jg
import org.rut.util.algorithm.support.BubbleSort; }!Diai*C
import org.rut.util.algorithm.support.HeapSort; N[ Lz 0c?
import org.rut.util.algorithm.support.ImprovedMergeSort; Y|0-m#1F#
import org.rut.util.algorithm.support.ImprovedQuickSort; /_VRO9R\V
import org.rut.util.algorithm.support.InsertSort; qm'C^X?
import org.rut.util.algorithm.support.MergeSort; fa+W9
import org.rut.util.algorithm.support.QuickSort; $cJN9|$6
import org.rut.util.algorithm.support.SelectionSort; avxn}*:X.
import org.rut.util.algorithm.support.ShellSort; k+q6U[ce
]"7DV3_
/** yhkQFB%gv
* @author treeroot _/sf@R
* @since 2006-2-2 CSX$Pk*
* @version 1.0 O"J.k&C<,
*/ c~L6fvS
public class SortUtil { nnd-pf-
public final static int INSERT = 1; 1{Alj27
public final static int BUBBLE = 2; 4_m /_Z0x
public final static int SELECTION = 3; ]|$$:e^U9
public final static int SHELL = 4; \_I)loPc8
public final static int QUICK = 5; vN%j-'D\A4
public final static int IMPROVED_QUICK = 6; 'j"N2NJ
public final static int MERGE = 7; P8,{k
public final static int IMPROVED_MERGE = 8; 6JFDRsX>)?
public final static int HEAP = 9; N>}K+M>
{OhkuON
public static void sort(int[] data) { A_(+r
sort(data, IMPROVED_QUICK); 0Yzb=QMD
} I>8@=V~
private static String[] name={ ndCS<ojcBP
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" = C'e1=]
}; n0_Az2
z$BnEd.y=:
private static Sort[] impl=new Sort[]{ NKUI! [
new InsertSort(), $vGEY7,
new BubbleSort(), iq^L~RW5e
new SelectionSort(), !^w\$cw&
new ShellSort(), 18/@:u{
new QuickSort(), M(h H#_$
new ImprovedQuickSort(), ;\*Od?1
new MergeSort(), ,@>rubUz
new ImprovedMergeSort(), f`9rTc
new HeapSort() b gc<)=
}; ;~@PYIp
~oW8GQ
public static String toString(int algorithm){ WGG) mh&-
return name[algorithm-1]; mQA<t)1
} klC^xSx
h%w\O Z7
public static void sort(int[] data, int algorithm) { '3u]-GU2_
impl[algorithm-1].sort(data); /XW0`FF
} W];6u
!VJa$>,
public static interface Sort { x"wM_hl5L
public void sort(int[] data); \lbiz4^>
} \IZ4(Z
?-F'0-t4%
public static void swap(int[] data, int i, int j) { ][5p.owJse
int temp = data; Ah>krE0t
data = data[j]; 4^NHf|UJH
data[j] = temp; "0 PN
} np\Q&
} tEX~72v