[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; v+, w{~7RH
} /)HEx&SQmZ
int i1=l; m]b.P,~v
int i2=mid+1; aG&kl O>m
for(int cur=l;cur<=r;cur++){ -Z#]_C{Y-)
if(i1==mid+1) E"vi+'(v
data[cur]=temp[i2++]; 4?6'~G$k
else if(i2>r) )I1V2k$n
data[cur]=temp[i1++]; S&g-
else if(temp[i1] data[cur]=temp[i1++]; c[eGpZ]
else Nl>b'G96
data[cur]=temp[i2++]; 1F%*k &R
} kKTED1MW&W
} UM;bVf?
!EC\1rmdlN
} 0DjBqh$
7*W$GCd8
改进后的归并排序: I2!&="7@
tw^.(m5d
package org.rut.util.algorithm.support; "MKsSty
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import org.rut.util.algorithm.SortUtil; .*..pf|/
oHGf |
/** kT3;%D^
* @author treeroot [aVJYr2
* @since 2006-2-2 +(hwe jyC
* @version 1.0 jF2GHyB
*/ I.0Usa"z
public class ImprovedMergeSort implements SortUtil.Sort { 1+[|pXT}
GoGgw]h>x
private static final int THRESHOLD = 10; gf8U &;
k.VOS0
/* :'Kx?Es
* (non-Javadoc) T_ #oMXZ/
* faeyk]u
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) (4gQe6tA
*/ >Qu^{o
public void sort(int[] data) { N`:bvr
int[] temp=new int[data.length]; B$eF@v"
mergeSort(data,temp,0,data.length-1); H s 3*OhK\
} :l[Q
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private void mergeSort(int[] data, int[] temp, int l, int r) { --hnv/AjI
int i, j, k; yM~D.D3H
int mid = (l + r) / 2; Jm^jz
if (l == r) J#5o
return; [wxI X
if ((mid - l) >= THRESHOLD) L*Cf&c`8r
mergeSort(data, temp, l, mid); tOVm~C,R
else gx.]4v
insertSort(data, l, mid - l + 1); Q";eyYdOL
if ((r - mid) > THRESHOLD) )xs,
mergeSort(data, temp, mid + 1, r); M- A}(r +J
else !~kzxY
insertSort(data, mid + 1, r - mid); f@g
VAzJclB
for (i = l; i <= mid; i++) { (pg9cM]NA
temp = data; @=1``z#
} B)NB6dCp
for (j = 1; j <= r - mid; j++) { K Hc+
temp[r - j + 1] = data[j + mid]; tfQq3#
} m^+~pC5
int a = temp[l]; ?V)6`St#C
int b = temp[r]; p+?WhxG)
for (i = l, j = r, k = l; k <= r; k++) { %j; cXN
if (a < b) { U]$3NIe
data[k] = temp[i++]; u'."E7o#
a = temp; Wg&:xff
} else { A4x3TW?
data[k] = temp[j--]; WGK::?
b = temp[j]; \]El%j4
} 9m!fW|4
} 55\mQ|.Jn
} xb\:H@92
zBfBYhS-
/** B8Z66#EQ
* @param data Mr(3]EfgO
* @param l RdHR[Usm
* @param i yL-L2
*/ 2D"/k'iA
private void insertSort(int[] data, int start, int len) { PMcyQ2R->
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); \9^@,kfP
} " cg>g/
} jEIL(0_H
} F^-4Pyq@
} ;*p}~#2
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堆排序： +l(}5(wc
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package org.rut.util.algorithm.support; %+~0+ev7r
"?SnA +)
import org.rut.util.algorithm.SortUtil; [qB=OxH?
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/** /Y:Zqk3
* @author treeroot }: e9\r)
* @since 2006-2-2 +8M{y D9#
* @version 1.0 c/RG1w
*/ Y|F);XXIl
public class HeapSort implements SortUtil.Sort{ ]Ea-?IhD
||f4f3R'
/* (non-Javadoc) Nsq%b?#
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) .PgkHb=l@
*/ x{E[qH_1Fm
public void sort(int[] data) { ^_uzr}LE`
MaxHeap h=new MaxHeap(); z5I<,[`
h.init(data); $)3/N&GXR
for(int i=0;i h.remove(); V.J%4&^X
System.arraycopy(h.queue,1,data,0,data.length); ryN-d%t?
} /+u*9ZR&1
<OUAppH
private static class MaxHeap{ >qCT#TY
hjE9[{K
void init(int[] data){ Rjf|
this.queue=new int[data.length+1]; 8Bhng;jX
for(int i=0;i queue[++size]=data; r"+ WUU
fixUp(size); 7j+.H/2
} $aG'.0HW
} IX}l)t[:(
0pQ>V)
private int size=0; p: o*=
m#Cp.|>kP4
private int[] queue; 2.6,c$2tB
x\*5A,w{c]
public int get() { gU`QW_{
return queue[1]; zMa`olTZ
} }V 1sY^C
z#y<QH
public void remove() { t/3veDh@
SortUtil.swap(queue,1,size--); Y !`H_Qo
fixDown(1); 8)i\d`
} ~Sh}\&3p
file://fixdown kz#DBh!&
private void fixDown(int k) { r )T`?y
int j; !54%}x)3
while ((j = k << 1) <= size) { ?}W:DGudZ
if (j < size %26amp;%26amp; queue[j] j++; w:qwU\U>x
if (queue[k]>queue[j]) file://不用交换 2]@U$E='s
break; h.67]U7m
SortUtil.swap(queue,j,k); c6e?)(V>
k = j; !l'Zar
} CSs3l
} u", [ulP
private void fixUp(int k) { &P\T{d2"
while (k > 1) { _8bqk\m+
int j = k >> 1; ddw!FH2W (
if (queue[j]>queue[k]) qWWy}5SOm
break; 'HOt?lpu!
SortUtil.swap(queue,j,k); ztu N0}'
k = j; [9w8oNg0
} Q 5Ln'La$
} A>X#[qx
RNm/&F1C$
} b+w|3bQa
wt-)5f'{
} `AYHCn
yM>c**9
SortUtil： f9;M"Pd
uHy^ Bq
package org.rut.util.algorithm; ).k=[@@V
M*%iMz
import org.rut.util.algorithm.support.BubbleSort; @*F NWT6
import org.rut.util.algorithm.support.HeapSort; ,;UVQwY
import org.rut.util.algorithm.support.ImprovedMergeSort; ' R{ [Y)
import org.rut.util.algorithm.support.ImprovedQuickSort; d6wsT\S
import org.rut.util.algorithm.support.InsertSort; mhh8<BI
import org.rut.util.algorithm.support.MergeSort; iQ:]1H s
import org.rut.util.algorithm.support.QuickSort; 7v#sr<
import org.rut.util.algorithm.support.SelectionSort; I:[3x2H
import org.rut.util.algorithm.support.ShellSort; eqYa`h@g^
_8kZ>w(L
/** )|3?7?X
* @author treeroot 7?e*b(vd
* @since 2006-2-2 e;!si>N
* @version 1.0 .#P'NF(5#
*/ ;ZB[g78%R%
public class SortUtil { a3JG&6-
public final static int INSERT = 1; 8h}o5B
public final static int BUBBLE = 2; 9>%ti&_-jt
public final static int SELECTION = 3; <t&0[l
public final static int SHELL = 4; Q% )fuI
public final static int QUICK = 5; fC52nK&T8
public final static int IMPROVED_QUICK = 6; 2{% U\^-
public final static int MERGE = 7; BH0].-)[y!
public final static int IMPROVED_MERGE = 8; c&J,O1){\
public final static int HEAP = 9; Z-.`JkKd8
8 YsDE_
public static void sort(int[] data) { `~F=
sort(data, IMPROVED_QUICK); *v_+a:
} 0ERA(=w5
private static String[] name={ ~sx?aiO
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" Z`Rrv$M!
}; ?zM]p"M
U@Y0z.Y
private static Sort[] impl=new Sort[]{ M3!A?!BU
new InsertSort(), <!EdND=
new BubbleSort(), #41~`vq3
new SelectionSort(), &Rdg07e;>
new ShellSort(), 8GgZAu'X
new QuickSort(), [W;iR_7T5
new ImprovedQuickSort(), W_8N?coM
new MergeSort(), DD{-xCCR
new ImprovedMergeSort(), JTA65T{3
new HeapSort() s]@()?.E$
}; Zn0e#n
4i|yEf
public static String toString(int algorithm){ 4+"2K-]
return name[algorithm-1]; |WwC@3)
} lA>^k;+>
8w/$!9[
public static void sort(int[] data, int algorithm) { wrI66R}@
impl[algorithm-1].sort(data); .5*5S[
} dxfF.\BFDn
yK9:LXhf
public static interface Sort { '-c *S]:r
public void sort(int[] data); 7vZtEwC)n
} @ >_v/U'
a4aM.o
public static void swap(int[] data, int i, int j) { cip5 -Z@8
int temp = data; 1seWR"
data = data[j]; j}u b
data[j] = temp; *WMI<w~_
} Sq22]
} hvW FzT5