[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; 5EVB27k
} pIM*c6
int i1=l; }A)^XZ/
int i2=mid+1; rHA/
for(int cur=l;cur<=r;cur++){ 4Ub?*
if(i1==mid+1) 9F-ViDI.
data[cur]=temp[i2++]; 7"h=MB_
else if(i2>r) ft*G*.0kO
data[cur]=temp[i1++]; dn:|m^<)
else if(temp[i1] data[cur]=temp[i1++]; R.^Bxi-UG:
else !nZI? z;
data[cur]=temp[i2++]; 1o"y%*"
} q(w1VcLZ
} UU;Ysj
u|:UFz^p
} )w3XN A_V
FRs|!\S=
改进后的归并排序: >TH-Q[
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package org.rut.util.algorithm.support; Q>#)LHX
& y 2GQJE
import org.rut.util.algorithm.SortUtil; ^5^ zo~^o
6+{nw}e8
/** y.TdWnXx
* @author treeroot c@"i?
* @since 2006-2-2 :IOn`mRYu
* @version 1.0 Xs#?~~"aC
*/ ocDVCCkxg
public class ImprovedMergeSort implements SortUtil.Sort { P+_\}u;
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private static final int THRESHOLD = 10; ZJ{+_ax0K
]h`E4B
/* yA`]%U((
* (non-Javadoc) =Un6|]
* t9=|* =;9)
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) s$3eJ|
*/ ?><
public void sort(int[] data) { ix_$Ok
int[] temp=new int[data.length]; &*?!*+!,i
mergeSort(data,temp,0,data.length-1); ^LQ lfd
} nd*!`P
h<z/LL8|
private void mergeSort(int[] data, int[] temp, int l, int r) { El8.D3
int i, j, k; 6nhfI\q3wY
int mid = (l + r) / 2; Z<m'he
if (l == r) _sD]Viqc
return; |M{,}.*CU
if ((mid - l) >= THRESHOLD) 5{x[EXE'
mergeSort(data, temp, l, mid); c#4ZDjvm6
else B39PDJ]hu
insertSort(data, l, mid - l + 1); y<gYf -E+
if ((r - mid) > THRESHOLD) pZ|nn
mergeSort(data, temp, mid + 1, r); 5qAE9G!c
else /hj9Q!
insertSort(data, mid + 1, r - mid); 2%No>w}/2
~d<`L[
for (i = l; i <= mid; i++) { )]e d;V
temp = data; oXZ@*
} %RR|QY*
for (j = 1; j <= r - mid; j++) { 2K7:gd8Ru
temp[r - j + 1] = data[j + mid]; '\vmfp=
} 'Q;?_,`
int a = temp[l]; "%@=?X8
int b = temp[r]; i?s&\3--Y
for (i = l, j = r, k = l; k <= r; k++) { o dQ&0d
if (a < b) { yl]Cm?8
data[k] = temp[i++]; `[HoxCV3o
a = temp; l8 2uK"M
} else { 0:(dl@I)@
data[k] = temp[j--]; U3R`mHr0
b = temp[j]; )<&CnK
} di P4]/%1
} VBj;2~Xj4h
} m_O=X8uj"D
>j~70 ?
/** >|&OcU
* @param data n[p9$W`
* @param l oDiv9jm
* @param i ofhZ@3
*/ JdNPfkOF
private void insertSort(int[] data, int start, int len) { -<^Q2]PE;
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); w+TuS).
} )( jNd&H
} xg%]\#
} MicVNs
} u KdX4
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堆排序： J+*Y)k
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package org.rut.util.algorithm.support; M/`z;a=EP
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import org.rut.util.algorithm.SortUtil; 6L% R@r
s 17gi,"X
/** )x O_
* @author treeroot l e/#J
* @since 2006-2-2 @x>2|`65Y
* @version 1.0 ~G^doj3|+
*/ Z8_gI[Zn
public class HeapSort implements SortUtil.Sort{ SPm5tU
e<wj5:M|
/* (non-Javadoc) <(lSNGv5N
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ~(E8~)f)
*/ 1s\hJATfz
public void sort(int[] data) { &l*dYzqq
MaxHeap h=new MaxHeap(); E|#R0n*
h.init(data); Wb(0Szk;
for(int i=0;i h.remove(); Ln -?/[E
System.arraycopy(h.queue,1,data,0,data.length); H ?:#Ui(p
} fmN)~-DV9`
W3j|%
private static class MaxHeap{ PP`n>v=n
jmNj#R@t
void init(int[] data){ HcUz2Rm5XP
this.queue=new int[data.length+1]; 1![bu
for(int i=0;i queue[++size]=data; 6KTY`'I
fixUp(size); ]>i0;RME
} i^KYZ4/%
} oh)l\
#9"_|d=l
private int size=0; LX&P]{qKS
a[rUU'8
private int[] queue; <LZvh8
@]3Rw[%z
public int get() { zSXC
return queue[1]; VMXXBa&
} :*nBo
PFw"ICs
public void remove() { i||YD-hkK
SortUtil.swap(queue,1,size--); ygPZkvZ
fixDown(1); -Av/L>TxlI
} p[wjHfIq
file://fixdown EAI[J&c
private void fixDown(int k) { U".-C`4v
int j; cnsGP*w
while ((j = k << 1) <= size) { &zT~3>2
if (j < size %26amp;%26amp; queue[j] j++; ( r O j,D
if (queue[k]>queue[j]) file://不用交换 %{{#Q]]&
break; -1o1k-8d
SortUtil.swap(queue,j,k); }lY-_y
k = j; 1Y`MJ\9
} <(^pHv7Q
} [q@%)F
private void fixUp(int k) { 4EK[gM8
while (k > 1) { zM'-2,
int j = k >> 1; mvw:E_
if (queue[j]>queue[k]) l\5NuCgRY
break; 2V]2jxOQ
SortUtil.swap(queue,j,k); x:xQXjJ
k = j; cwroG#jGT
} Wama>dy%
} $Yka\tS'
v\Hyu1;8
} kr?|>6?
x#^kv)
} ;1%a:#5
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SortUtil： :wZZ 1qa
X]!@xlwF\
package org.rut.util.algorithm; }FXRp=s
Ie~~LU
import org.rut.util.algorithm.support.BubbleSort; UXP;'
import org.rut.util.algorithm.support.HeapSort; 4Q>F4v`
import org.rut.util.algorithm.support.ImprovedMergeSort; R4/@dA0
import org.rut.util.algorithm.support.ImprovedQuickSort; d(!N$B\[5T
import org.rut.util.algorithm.support.InsertSort; b\2"1m0H
import org.rut.util.algorithm.support.MergeSort; NEk [0
import org.rut.util.algorithm.support.QuickSort; 9E^piLA
import org.rut.util.algorithm.support.SelectionSort; S&*pR3,u
import org.rut.util.algorithm.support.ShellSort; sn(}5;
*"ShE=\p
/** 8'_Y=7b0Nw
* @author treeroot xh0A2bw'OP
* @since 2006-2-2 s,Swlo7D!
* @version 1.0 2"O Y]d
*/ #7=LI\
public class SortUtil { q4{tH
public final static int INSERT = 1; :+Kesa:E
public final static int BUBBLE = 2; ^=G+]$8
public final static int SELECTION = 3; \Hd B
public final static int SHELL = 4; gL`SZr9
public final static int QUICK = 5; wNZ7(W.U
public final static int IMPROVED_QUICK = 6; m##=iB|;
public final static int MERGE = 7; "puz-W'n
public final static int IMPROVED_MERGE = 8; =&b[V"
public final static int HEAP = 9; ([~`{,sv
FS:WbFmc
public static void sort(int[] data) { pZxL?N!
sort(data, IMPROVED_QUICK); {9 O`/|
} 7w,FA
private static String[] name={ 4)I#[&f
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" s`RJl V
}; hT"K}d;X
`'WLGQG
private static Sort[] impl=new Sort[]{ 03@|dN
new InsertSort(), \<**SSN
new BubbleSort(), +ctv]'P_
new SelectionSort(), TzGm562o%
new ShellSort(), lvi:I+VgA
new QuickSort(), 'OCo1|iK~
new ImprovedQuickSort(), 3:1 c_
new MergeSort(), 0h4}RmS
new ImprovedMergeSort(), :g#it@
new HeapSort() \DK*> k
}; Ir #V2]$
:* b4/qpYv
public static String toString(int algorithm){ uFZB8+
return name[algorithm-1]; [dlH t;S
} 2j1v.%
Y{RB\}f(
public static void sort(int[] data, int algorithm) { +Q31K7Gr
impl[algorithm-1].sort(data); vfJk? (
} s$x] fO
9X9zIh]JV
public static interface Sort { vqMk)htIz
public void sort(int[] data); &>.1%x@R
} q- (NZno
-Jo :+].
public static void swap(int[] data, int i, int j) { ?3,tG z)
int temp = data; h./vTNMc
data = data[j]; 3}{5 X'
data[j] = temp; eZ5}O0sfp
} `)M\(_
} <<5 :zlb