[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; ]>8)|]O6n
} dtTlIhh1V
int i1=l; ~6d5zI4\
int i2=mid+1; 3cThu43c
for(int cur=l;cur<=r;cur++){ [Vp\$;\nT
if(i1==mid+1) Le&;g4%
data[cur]=temp[i2++]; T2|:nC)@
else if(i2>r) J"&y|;G
data[cur]=temp[i1++]; oEIqA
else if(temp[i1] data[cur]=temp[i1++]; zs8I
else v<&v]!nF
data[cur]=temp[i2++]; sykFSPy`'
} e/94y6*>
} [z+x"9l0!
>EIrw$V$
} x'i0KF
}n[Bq#
改进后的归并排序: ,` o+ ?
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package org.rut.util.algorithm.support; kl<g;3
) ,Npv3(
import org.rut.util.algorithm.SortUtil; 2.qpt'p[
0N5bPb
/** !Uy>eji}
* @author treeroot e1^l.>2d6
* @since 2006-2-2 |yv]Y/=
* @version 1.0 c&e0OV\m
*/ ^Y 7U1I
public class ImprovedMergeSort implements SortUtil.Sort { ZNL5({lv
s=U\_koyH
private static final int THRESHOLD = 10; ke6n/ h5`
g;G5 r&T
/* FL&dv
* (non-Javadoc) s<VJ`Ur
* LyP`{_"CM
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) a}yR p
*/ OjATSmZ@@
public void sort(int[] data) { FmI;lVF0j
int[] temp=new int[data.length]; :mp$\=
mergeSort(data,temp,0,data.length-1); tJm{I)G
} Tf[dZ(+\
b1)\Zi
private void mergeSort(int[] data, int[] temp, int l, int r) { v,0<9!'v
int i, j, k; })7K S?
int mid = (l + r) / 2; /7vE>mSY
if (l == r) f?-J#x)
return; VIg\]%qse
if ((mid - l) >= THRESHOLD) FG#nap{
mergeSort(data, temp, l, mid); hS_.l}0yf
else iT$d;5_pU
insertSort(data, l, mid - l + 1); vZk9gGjk
if ((r - mid) > THRESHOLD) `^e*T'UPl
mergeSort(data, temp, mid + 1, r); Wr#~GFg
else 3+zzi
insertSort(data, mid + 1, r - mid); qc&jd
r?$&Z^
for (i = l; i <= mid; i++) { acae=c|X
temp = data; }.t^D|
} ^O \q3HA_4
for (j = 1; j <= r - mid; j++) { {*fUJmao"
temp[r - j + 1] = data[j + mid]; 5M.Red.L
} DaDUK?
int a = temp[l]; O! (85rp/
int b = temp[r]; #JFYws
for (i = l, j = r, k = l; k <= r; k++) { GhiHA9.
if (a < b) { nX 8B;*p6b
data[k] = temp[i++]; g]4yAV<2
a = temp; ,!H\^Vfl
} else { D6:DrA:
data[k] = temp[j--]; kQ[Jo%YT?E
b = temp[j]; 2-7Z(7G{ F
} mtX31M4
} Gw`/.0
} tvCcyD%w
-R8/`M8GbD
/** //tT8HX
* @param data #/s7\2
* @param l NfqJ=9
* @param i Yx 3|G
*/ /N%zwj/*
private void insertSort(int[] data, int start, int len) { g/B\ObY
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); v^\JWPR/
} MYu`c[$jZ
} ydyG}XI7V
} cdDY]"k
} SctJxY(}!
1yJ75/
堆排序： SdSgn|S
bq: [Nj
package org.rut.util.algorithm.support; n{$}#NdV
TH>,v
import org.rut.util.algorithm.SortUtil; /} a_8iM\
OQ,}/
/** W[fT R?n
* @author treeroot ZIe+
* @since 2006-2-2 ka8$dfC
* @version 1.0 ajGcKyj8i
*/ FvAbh]/4
public class HeapSort implements SortUtil.Sort{ s!aO*\[<h
W7$s5G,
/* (non-Javadoc) y,V6h*x2
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 9u?Eb~#$
*/ 3? };
public void sort(int[] data) { X'xUwT|_+
MaxHeap h=new MaxHeap(); n_1jHJo
h.init(data); /Bh>
for(int i=0;i h.remove(); @Jm.HST#S8
System.arraycopy(h.queue,1,data,0,data.length); {x9j_/R
} Xout:dn
[.ey_}X8
private static class MaxHeap{ 3Qk/ Ll
nPcxknl(pd
void init(int[] data){ a^(2q{*
this.queue=new int[data.length+1]; n 3h^VQ*]G
for(int i=0;i queue[++size]=data; {N"*olx
fixUp(size); 7MoR9,(
} z>7=k`x`:
} }'v{dK
%uj[`
private int size=0; .(JE-upJ"
hRa\1Jt>a
private int[] queue; *^uGvJXF
p1klLX
public int get() { ^]i" H|(x
return queue[1]; ?P%|P
} %n4@[fG%K
&{BBxv)y
public void remove() { ?THa5%8f
SortUtil.swap(queue,1,size--); J}:&eS
fixDown(1); ed=n``P~}
} #jOOsfH|k
file://fixdown dV)Y,Yx0${
private void fixDown(int k) { X=JFWzC
int j; J0Jr BXCh
while ((j = k << 1) <= size) { ~m!#FTc*
if (j < size %26amp;%26amp; queue[j] j++; :MK:TJV
if (queue[k]>queue[j]) file://不用交换 1E8$% 6VV
break; uL bp.N8
SortUtil.swap(queue,j,k); (VfwLo>#
k = j; &<`-:x12_
} u2Y N[|V
} re]%f"v:5
private void fixUp(int k) { pa>p%
while (k > 1) { gAj0ukX5
int j = k >> 1; tB]`Hj
if (queue[j]>queue[k]) =[s8q2V
break; @51z-T
SortUtil.swap(queue,j,k); l+|1G
k = j; cW=Qh-`jU;
} DE'Xq6#PK
} d8rBu jT
GI}4,!^N
} SwyaYK
nT_*EC<.
} F ~*zC`>Y
p@vpd
SortUtil： " 98/HzR
u$apH{
package org.rut.util.algorithm; %B[YtWqm`/
:wFb5"
import org.rut.util.algorithm.support.BubbleSort; fdN45in=>
import org.rut.util.algorithm.support.HeapSort; "&@gX_%
import org.rut.util.algorithm.support.ImprovedMergeSort; j[_t6Z
import org.rut.util.algorithm.support.ImprovedQuickSort; )uANmThOz
import org.rut.util.algorithm.support.InsertSort; _MGNKA6JI
import org.rut.util.algorithm.support.MergeSort; ;9}w|!/
import org.rut.util.algorithm.support.QuickSort; o1 jk=
import org.rut.util.algorithm.support.SelectionSort; 3xRM 1GgO
import org.rut.util.algorithm.support.ShellSort; n/xXQ7y
|!{z? i
/** m"5{D*|
* @author treeroot ~u};XhZ
* @since 2006-2-2 sq6>DuBZz
* @version 1.0 T@B"BoKU
*/ 7We?P,A\;
public class SortUtil { su,`q
public final static int INSERT = 1; , - QR
public final static int BUBBLE = 2; q sv+.aW
public final static int SELECTION = 3; @P*ylB}?Q
public final static int SHELL = 4; c]GQU
public final static int QUICK = 5; Lc58lV=
public final static int IMPROVED_QUICK = 6; P;^y|0Nm
public final static int MERGE = 7; J>&[J!>r
public final static int IMPROVED_MERGE = 8; CR%D\I$o
public final static int HEAP = 9; c$@`P
d,zp`S
public static void sort(int[] data) { VEL:JsY
sort(data, IMPROVED_QUICK); FX{~"
} " ]aQ Hh]f
private static String[] name={ AEB/8%l};v
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" gmXy>{T
}; &B?@@6
xylpiSJ
private static Sort[] impl=new Sort[]{ [Bl $IfU
new InsertSort(), _`TepX R
new BubbleSort(), Rbx97(wK
new SelectionSort(), kJHr&=VO~
new ShellSort(), U* -% M
new QuickSort(), `2Wl
new ImprovedQuickSort(), >L#];|
new MergeSort(), 3 %z
new ImprovedMergeSort(), H|grbTv,
new HeapSort() &mX5&e
}; `Af{H/qiI
/p[|DJoM
public static String toString(int algorithm){ b{Z^)u2X
return name[algorithm-1]; AQE eIFH
} *!._Ais,\
6XQ*:N/4al
public static void sort(int[] data, int algorithm) { WAtg
impl[algorithm-1].sort(data); j9{O0[v
} ^>3tYg&7
L4MxU 2
public static interface Sort { $ \? N<W
public void sort(int[] data); x, G6\QmA
} i}.{m Et
qzuQq94k
public static void swap(int[] data, int i, int j) { pWWL{@J
int temp = data; %4?SY82
data = data[j]; ZC3tbhV
data[j] = temp; ~5lKL5w
} aQ.Iq
} +P>Gy`D9