[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; 2%]t3\XW
} !ABLd|tP
int i1=l; PHQcstW
int i2=mid+1; At|ht
for(int cur=l;cur<=r;cur++){ %&2B
if(i1==mid+1) #:I^&~:
data[cur]=temp[i2++]; !p"Kd ~
else if(i2>r) (xQI($Wq*M
data[cur]=temp[i1++]; 2{gwY85:
else if(temp[i1] data[cur]=temp[i1++]; 2D_6
else ++gPv}:$X
data[cur]=temp[i2++]; ZR2\dH*
} l3\9S#3-^
} `|JI\&z
I*9Gb$]=
} GJ>ypEWo
l`qP~k#
改进后的归并排序: s)Gb!-``
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package org.rut.util.algorithm.support; %cd]xQpCp
i _8zjj7
import org.rut.util.algorithm.SortUtil; 3U>S]#5}
$Uy#/MX
/** H!#5!m&
* @author treeroot sB8p( L
* @since 2006-2-2 %'kX"}N/
* @version 1.0 W=F3XYS
*/ +O,V6XRr
public class ImprovedMergeSort implements SortUtil.Sort { eA10xpM0
03] r*\
private static final int THRESHOLD = 10; i >J:W"W
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/* ym[+Rw
* (non-Javadoc) ,A^L=+
* 9M;I$_U`vj
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) tRkrV]K
*/ <w;D$l}u
public void sort(int[] data) { C\J@fpH(t`
int[] temp=new int[data.length]; c.\:peDk
mergeSort(data,temp,0,data.length-1); svF*@(-P#
} EJv!tyJ\[
s~/57S
private void mergeSort(int[] data, int[] temp, int l, int r) { +6uOg,;
int i, j, k; Hc>([?P%t
int mid = (l + r) / 2; 8R&z3k;!t
if (l == r) XpOCQyFnM
return; ~;TV74~rr
if ((mid - l) >= THRESHOLD) E8+8{ #f;
mergeSort(data, temp, l, mid); vsjM3=
else *P&OxVz
insertSort(data, l, mid - l + 1); ?Z5$0-g'hU
if ((r - mid) > THRESHOLD) 7%W!k zp>
mergeSort(data, temp, mid + 1, r); IM$'J
else ws#hhW3qK
insertSort(data, mid + 1, r - mid); l DgzM3
h)"'YzCt
for (i = l; i <= mid; i++) { FyQOa)5
temp = data; 9]"\"ka3>
} bx1G CD
for (j = 1; j <= r - mid; j++) { pVdhj^n
temp[r - j + 1] = data[j + mid]; kWI]fZ_n
} Qh/lT$g
int a = temp[l]; )x y9X0
int b = temp[r]; ?exALv'B
for (i = l, j = r, k = l; k <= r; k++) { cPx66Dh&
if (a < b) { K,Lr+
data[k] = temp[i++]; <<i=+ed8eP
a = temp; >qr=l,Hi
} else { F>p%2II/
data[k] = temp[j--]; $cyLI+uz|
b = temp[j]; ,^Ex}Z
} ))c*_n
} :Xb*m85y
} >:="?'N5l!
g]:..W7
/** V=:,]fTr
* @param data Z?5,cI[6#
* @param l u!sSgx=
* @param i M|5^':Y
*/ 44z=m MR<
private void insertSort(int[] data, int start, int len) { SZNFE
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); ER0TY,
} }Ox2olUX
} A;K{&x
} ':5U&
} tW'qO:y+
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堆排序： [I#Q
b=6ZdN1
package org.rut.util.algorithm.support; = .fc"R|<K
8f5%xY$
import org.rut.util.algorithm.SortUtil; 5;r({J
A{xSbbDk
/** y}s 0J K
* @author treeroot O%rS;o
* @since 2006-2-2 :==UDVP
* @version 1.0 lsTe*Od
*/ !H2C9l:rd
public class HeapSort implements SortUtil.Sort{ '5&B~ 1&
Ut0qrkqF
/* (non-Javadoc) 37GHt9l
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 5<0Yh#_
*/ ]IN-
public void sort(int[] data) { hg)!m\g
MaxHeap h=new MaxHeap(); XyN`BDFi
h.init(data); yTMGISX5
for(int i=0;i h.remove(); ?)i6:76(
System.arraycopy(h.queue,1,data,0,data.length); ,i1fv "
} 9 ayH:;
O% j,:t'"
private static class MaxHeap{ }[YcilU_
Cf8R2(-4
void init(int[] data){ lk5_s@V l
this.queue=new int[data.length+1]; $\=6."R5<
for(int i=0;i queue[++size]=data; w+:+r/!g
fixUp(size); #)IdJ]
} YB(#]H|8S
} L>|A6S#y8/
fh/)di
private int size=0; wFH(.E0@Q
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private int[] queue; nJnO/~|
*GY,h$Ul
public int get() { 5cv, >{~5
return queue[1]; ePFC$kMn
} ;1Tpzm
5Lo==jHif
public void remove() { ~}FLn9@*
SortUtil.swap(queue,1,size--); lUm}nsp=X
fixDown(1); QZeb+r
} (]GY.(F{
file://fixdown `qQQQ.K7)z
private void fixDown(int k) { pw(*X,gj
int j; `0-m`>1>
while ((j = k << 1) <= size) { Tg}H < T
if (j < size %26amp;%26amp; queue[j] j++; '8iv?D5M
if (queue[k]>queue[j]) file://不用交换 NWq [22X |
break; 6Wcn(h8%*
SortUtil.swap(queue,j,k); ]Y/pSwnV
k = j; @5POgQ8
} 7i%P&oB
} m''iE
private void fixUp(int k) { {;wK,dU
while (k > 1) { v:!7n
int j = k >> 1; rSzXa4m(
if (queue[j]>queue[k]) SK~;<>:37
break; /3bca!O
SortUtil.swap(queue,j,k); dh7)N}2
k = j; $(!D/bvJ
} Y?q*hS0!H
} 2R~=@
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} q,19NZ
knj,[7uh
} a|^-z|.
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SortUtil： LP-KD
(*@~HF,t=
package org.rut.util.algorithm; HEW9YC"
VA*79I#_q
import org.rut.util.algorithm.support.BubbleSort; zke~!"iq
import org.rut.util.algorithm.support.HeapSort; tI6USN%
import org.rut.util.algorithm.support.ImprovedMergeSort; }G0.Lq+a
import org.rut.util.algorithm.support.ImprovedQuickSort; Q{)F$]w
import org.rut.util.algorithm.support.InsertSort; CuGOjQ-k~
import org.rut.util.algorithm.support.MergeSort; A/W7;D
import org.rut.util.algorithm.support.QuickSort; {e!uvz,e
import org.rut.util.algorithm.support.SelectionSort; ^Xz`hR
import org.rut.util.algorithm.support.ShellSort; 67hPQ/S1
T3PaG\5B
/** DdA}A>47
* @author treeroot q=L* 99S
* @since 2006-2-2 \q)1TTnHS
* @version 1.0 B3k],k
*/ `qy6qKl N
public class SortUtil { ~dX@5+Gd
public final static int INSERT = 1; NU6Kh7
public final static int BUBBLE = 2; 4N^Qd3[d
public final static int SELECTION = 3; \$0 x8B
public final static int SHELL = 4; hghto \G5Y
public final static int QUICK = 5; x%Y a*T
public final static int IMPROVED_QUICK = 6; 4wEpyQ|L
public final static int MERGE = 7; %v6]>FNP'3
public final static int IMPROVED_MERGE = 8; ]idD&5gd
public final static int HEAP = 9; %W|Zj QI^
&?ed.V@E5
public static void sort(int[] data) { [Z`:1_^0}
sort(data, IMPROVED_QUICK); 'V*M_o(\
} dzC&7 9$
private static String[] name={ q?'gwH37
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 6 GevO3
}; YnL?t-$Gg
P(gID
private static Sort[] impl=new Sort[]{ T"0)%k8lJ
new InsertSort(), oKqFZ,m[
new BubbleSort(), `EW_pwZPA
new SelectionSort(), 113x9+w[
new ShellSort(), , $F0D
new QuickSort(), X +
new ImprovedQuickSort(), NX#/1=
new MergeSort(), 9G\3hL]
new ImprovedMergeSort(), b"3T(#2<*
new HeapSort() $5p'+bE
}; oVZ8p-
zk_hDhg&'
public static String toString(int algorithm){ ~k<31 ez
return name[algorithm-1]; E)Epr&9S
} ?@ye*%w_
XQoT},C
public static void sort(int[] data, int algorithm) { 1VM5W!}
impl[algorithm-1].sort(data); NCh(-E
} XIW:Nk!S
7bW!u*v-c
public static interface Sort { )|1JcnNSa
public void sort(int[] data); y5tAp
} FZI 4?YD?<
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public static void swap(int[] data, int i, int j) { ReGb.pf
int temp = data; /8-VC"
data = data[j]; Ac(Vw%
data[j] = temp; 4I[FE;^
} 8t 35j
} GP kCgb(