[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; FgrOZI;_
} 7&/iuP$.
int i1=l; 7=u\D
int i2=mid+1; LR]P?
for(int cur=l;cur<=r;cur++){ /@lXQM9T
if(i1==mid+1) GfD!Z3
data[cur]=temp[i2++]; pY!@w0.
else if(i2>r) 0^*4LM|z
data[cur]=temp[i1++]; 'h%)@q)J)
else if(temp[i1] data[cur]=temp[i1++]; &!2 4l=!
else ae{%* \J
data[cur]=temp[i2++]; pq#Hca[
} E@hvO%
} <w+K$WE {
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} v0jRoE#
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改进后的归并排序: }I}RqD:`
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package org.rut.util.algorithm.support; s[nXr
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import org.rut.util.algorithm.SortUtil; _OZrH(8
' ]l,
/** ~A}"s-Kq5
* @author treeroot .d^8w97
* @since 2006-2-2 &sh %]o8
* @version 1.0 `]_#_
*/ VT?JTW
public class ImprovedMergeSort implements SortUtil.Sort { tmDI2Z%7
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private static final int THRESHOLD = 10; }=?kf3k
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/* )/HSt%>
* (non-Javadoc) &`0y<0z
* Z 3m5DK
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) L10Vq}W"
*/ qi;@A-cq
public void sort(int[] data) { Pan^@B=Q
int[] temp=new int[data.length]; he8y
mergeSort(data,temp,0,data.length-1); Ms=x~o'
} $L)9'X
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private void mergeSort(int[] data, int[] temp, int l, int r) { BR8z%R
int i, j, k; .<gAa"
int mid = (l + r) / 2; xv]P-q0
if (l == r) ':R)i.TS
return; iSUn}%YFz!
if ((mid - l) >= THRESHOLD) |t1D8){!
mergeSort(data, temp, l, mid); ~=aGv%vX
else Q 6{2@
insertSort(data, l, mid - l + 1); {UQpD
if ((r - mid) > THRESHOLD) 6P;IKOv^
mergeSort(data, temp, mid + 1, r); wWko9h=|mQ
else Xnt`7L<L
insertSort(data, mid + 1, r - mid); zq80}5%2CT
RvZi%)
for (i = l; i <= mid; i++) { K%[Rv#>;q|
temp = data; )Uw QsP
} :[#HP66[O5
for (j = 1; j <= r - mid; j++) { r4@!QR<h
temp[r - j + 1] = data[j + mid]; f7)}A/$4+
} o )GNV
int a = temp[l]; Q6Vy}
int b = temp[r]; m4<8v
for (i = l, j = r, k = l; k <= r; k++) { usZmf=p-r
if (a < b) { ,v4Z[ (
data[k] = temp[i++]; B#&U5fSw+0
a = temp; 8iB1a6TlL
} else { _:x/\8P
data[k] = temp[j--]; bqJL@!T
b = temp[j]; y-cRqIM
} Q%o ]&Hdn
} w{#K.dx
} kpsus \T
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/** cR[)[9}
* @param data W#$ pt>h)
* @param l -\b~R7VQ
* @param i YT+fOndjaF
*/ UO5^4
private void insertSort(int[] data, int start, int len) { ,}2M'DSWa
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); x|<rt966A
} 36`aG Y
} ;+>-uPT/1
} oJ ,t]e*q=
} "[L[*>[9!
BT: =
堆排序： 8c`g{ *z
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package org.rut.util.algorithm.support; S)Sv4Qm
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import org.rut.util.algorithm.SortUtil; !lG5BOJM
G#ZU^%$M,
/** H2 5Mx>|d
* @author treeroot ZMids"Xdf
* @since 2006-2-2 DPw"UY:
* @version 1.0 w6+X{
*/ \CM/KrCR
public class HeapSort implements SortUtil.Sort{ Ytmt+9
o/@.*Rj>Bg
/* (non-Javadoc) B_i@D?bTD
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) |lm
*/ poGF
public void sort(int[] data) { lsU|xOB
MaxHeap h=new MaxHeap(); MLtfi{;LH
h.init(data); jY-{hW+r
for(int i=0;i h.remove(); s+YQ :>F
System.arraycopy(h.queue,1,data,0,data.length); /zMiy?
} mk~&>\
~'m GGH2
private static class MaxHeap{ a)^f`s^aa
}i!hzkK#
void init(int[] data){ F&<si:}KB
this.queue=new int[data.length+1]; /B.\6
for(int i=0;i queue[++size]=data; ):; &~
fixUp(size); >KH.~Jfy
} <]eWr:;
} ^8Tq0>n?
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private int size=0; fWhwI+
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private int[] queue; h-+9Bv]
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public int get() { 1q]V/V}
return queue[1]; 5, R\tJCK
} e7T"?s
cq>{
public void remove() { coT|t T
SortUtil.swap(queue,1,size--); w&jyijk(
fixDown(1); !(~eeE}|lM
} W(Z_ac^e[
file://fixdown j$'L-kK+
private void fixDown(int k) { zPEx;lO$
int j; jku_0Q0*?
while ((j = k << 1) <= size) { PVH^yWi n
if (j < size %26amp;%26amp; queue[j] j++; S;sggeP7,
if (queue[k]>queue[j]) file://不用交换 B!0o6)u'
break; >&6pBtC_
SortUtil.swap(queue,j,k); [tGAo/
k = j; D^yZ!}Kl
} -'BC*fVr
} 0ubT/
private void fixUp(int k) { 6S)$wj*w
while (k > 1) { qL.1N~$2
int j = k >> 1; (Gr8JpV
if (queue[j]>queue[k]) ~CIA6&
break; -CtLL_I
SortUtil.swap(queue,j,k); @]P#]%^D2
k = j; !#j y=A
} F$QN>wPpM
} [* ,k
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} 7nM]E_
:@x24wN/
} N7Vv"o
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SortUtil： XdE#l/#
M}=X/*T
package org.rut.util.algorithm; " 2A`M~
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import org.rut.util.algorithm.support.BubbleSort; & 9}L +/,
import org.rut.util.algorithm.support.HeapSort; (jd)sf6Tj[
import org.rut.util.algorithm.support.ImprovedMergeSort; by!1L1[JTt
import org.rut.util.algorithm.support.ImprovedQuickSort; j oDY
import org.rut.util.algorithm.support.InsertSort; *z I@Htp
import org.rut.util.algorithm.support.MergeSort; KI)jP((
import org.rut.util.algorithm.support.QuickSort; t0h@i`
import org.rut.util.algorithm.support.SelectionSort; nI7G"f[%r;
import org.rut.util.algorithm.support.ShellSort; Sm-gi|A
gw' uY$
/** DjY&)oce(
* @author treeroot z(b0U6)qQ
* @since 2006-2-2 j3 ,6UjlU
* @version 1.0 tkX7yg>`
*/ Y5?*=eM
public class SortUtil { is}6cR
public final static int INSERT = 1; *'4+kj7>
public final static int BUBBLE = 2; %EkV-%o*
public final static int SELECTION = 3; jkCa2!WQ'i
public final static int SHELL = 4; C^9G \s'
public final static int QUICK = 5; c-3-,pyM_T
public final static int IMPROVED_QUICK = 6; Ks'msSMC
public final static int MERGE = 7; reseu*5
public final static int IMPROVED_MERGE = 8; u`?MV2jU2
public final static int HEAP = 9; :EJ8^'0Q
-kFEVJbUyc
public static void sort(int[] data) { WO$9Svh8
sort(data, IMPROVED_QUICK); Jm8{@D%
} gZ vX~
private static String[] name={ 9n4vuBgv
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" Lt`d {s
}; uc;1{[5`1q
Xi"+{6
private static Sort[] impl=new Sort[]{ 2..b/
new InsertSort(), _RI`I}&9Z
new BubbleSort(), *+|D8xp
new SelectionSort(), mU0j K@^&M
new ShellSort(), qQK0s*^W
new QuickSort(), v0uDL7
new ImprovedQuickSort(), -OV:y],-
new MergeSort(), 6[3oOO:uo
new ImprovedMergeSort(), \yt-_W=[
new HeapSort() Sl,X*[HGd
}; );EW(7KeL
BkywYCWZ )
public static String toString(int algorithm){ |dNJx<-
return name[algorithm-1]; PNy)TqdRS
} ,@I_b
B-'oB>|
public static void sort(int[] data, int algorithm) { (=#[om(A
impl[algorithm-1].sort(data); u\-WArntc
} $Ro]]NUz|
|,!]]YO.V
public static interface Sort { tFlLKziU
public void sort(int[] data); u /PaXQ
} cHqT1EY
>f)/z$ qn
public static void swap(int[] data, int i, int j) { DD 8uG`<
int temp = data; /$a>f>EJ
data = data[j]; mL\_C9k,n
data[j] = temp; i,#j@R@.C7
} 2XoFmV),F
} : L}Fm2^