[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; p63fpnH
} %S%UMA.
int i1=l; =Fe4-B?I
int i2=mid+1; kP5I+B
for(int cur=l;cur<=r;cur++){ |7K>`
if(i1==mid+1) 3B]E2
data[cur]=temp[i2++]; zn/>t-Bc
else if(i2>r) _gH$ ,.j/
data[cur]=temp[i1++]; "Pc}-&
else if(temp[i1] data[cur]=temp[i1++]; E\}A<r
else r7R39#
data[cur]=temp[i2++]; $J4)z&%dr
} uju'Bs7
} ]fDb|s48
zv"NbN
} ;P<h9(
bR}fj.gP
改进后的归并排序: vMY!Z1.*
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package org.rut.util.algorithm.support; ga,kKPL
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import org.rut.util.algorithm.SortUtil; AP`1hz4].-
CY':'aWfa<
/** o;DK]o>kH
* @author treeroot WNeBthq6
* @since 2006-2-2 k{{ Y2B?C
* @version 1.0 0`V=x+*,
*/ p5"pQeS
public class ImprovedMergeSort implements SortUtil.Sort { tYgHJ~1L*
xVYa-I[Z
private static final int THRESHOLD = 10; #""T>+
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/* -cJ,rrN_9
* (non-Javadoc) +2tFX
* s;l"'6:_
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) HNc/p4z
*/ BK)<~I
public void sort(int[] data) { }tBw<7fe
int[] temp=new int[data.length]; : Wtpg
mergeSort(data,temp,0,data.length-1); +BO kHXk1
} 2z$!}
S~H>MtX(<
private void mergeSort(int[] data, int[] temp, int l, int r) { LPs5LE[Pm
int i, j, k; -da: j-_
int mid = (l + r) / 2; mJ(ElDG
if (l == r) vgDpo@fz8
return; >hSu1s:
if ((mid - l) >= THRESHOLD) +84 p/B#
mergeSort(data, temp, l, mid); .x] pJ9
else -{C Gn5]_#
insertSort(data, l, mid - l + 1); @(*A<2;N
if ((r - mid) > THRESHOLD) $0OOH4
mergeSort(data, temp, mid + 1, r); \b6{u6?+
else SHB'g){P
insertSort(data, mid + 1, r - mid); HCkfw+gaV
LXJ;8uW2y
for (i = l; i <= mid; i++) { j+dQI_']x
temp = data; &w`DF,k|
} Q}l~n)=
for (j = 1; j <= r - mid; j++) { 0WKS
temp[r - j + 1] = data[j + mid]; lIx./Nf
} Z]tQmV8e
int a = temp[l]; G9am}qr
int b = temp[r]; 5D<ZtsXE
for (i = l, j = r, k = l; k <= r; k++) { =-r); d
if (a < b) { j_h:_D4
data[k] = temp[i++]; $%M]2_W(
a = temp; <I2ENo5?
} else { &Ruq8n<
data[k] = temp[j--]; h6?Z
b = temp[j]; b$Dh|-8
} 9;\mq'v%
} @-xvdntx
} Ya!%o> J%t
:?y Ma$
/** 2P^qZDG 8I
* @param data Z zp"CK 5
* @param l S-Bx`e9'
* @param i P7Qel,
*/ v2:i'j6
private void insertSort(int[] data, int start, int len) { dkDPze9l
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); T*=*$%
} UuF(n$B
} u-:3C<&>
} ,=[%#gS
} |S|'o*u
5U+4vV/*
堆排序： ?YS 3)
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package org.rut.util.algorithm.support; wD{c$TJ?{F
Xxd]j]
import org.rut.util.algorithm.SortUtil; |KS,k|).
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/** c>>.>^5
* @author treeroot GQCdB>
* @since 2006-2-2 ysp`(n=
* @version 1.0 Za3}:7`Gu
*/ 'x"(OdM:[
public class HeapSort implements SortUtil.Sort{ Sx e6&
dY~z6bT
/* (non-Javadoc) kL0K[O
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) qnj'*]ysBC
*/ H, :]S-T
public void sort(int[] data) { 2E!~RjxSY
MaxHeap h=new MaxHeap(); |m ?ZE:
h.init(data); 9:VUtx#}2
for(int i=0;i h.remove(); -rm[.
System.arraycopy(h.queue,1,data,0,data.length); !8cV."~
} nM b@ B
2xX:Q'\2
private static class MaxHeap{ ArNQ}F/
pe+h8
void init(int[] data){ T>L?\-
this.queue=new int[data.length+1]; .1{{E8Fj
for(int i=0;i queue[++size]=data; pWJEFm
fixUp(size); -,p=;t#(
} }$L63;/H
} q^EY?;Y
qa )BbK^i
private int size=0; uXh:/KO
W [K.|8ho
private int[] queue; Ihf :k_;
q=BljSX
public int get() { tS]
return queue[1]; TSsZzsdr2
} R( FQ+h
uij^tN%
public void remove() { .\^0RyJE
SortUtil.swap(queue,1,size--); /+SLq`'u)
fixDown(1); 'OziP
} 0x!&>
file://fixdown u%)gnj_
private void fixDown(int k) { y3s+.5;
int j; wAprksZL#
while ((j = k << 1) <= size) { &.*UVc2+Y
if (j < size %26amp;%26amp; queue[j] j++; tULGfvp
if (queue[k]>queue[j]) file://不用交换 qVE0[ve
break; =ZIT!B?4
SortUtil.swap(queue,j,k); o" ,8
k = j; M }d:B)cz
} gK[;"R)4o@
} vCaN[
private void fixUp(int k) { YoKyiO!
while (k > 1) { UDg's
int j = k >> 1; 8v& \F
if (queue[j]>queue[k]) X&qx4DL
break; #lLUBJ#:
SortUtil.swap(queue,j,k); ;X,u
k = j; |0y#} |/
} 8I#ir4z#<
} 'cXdc
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} d7X&3L%Oq
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} U4pIRa)S
RU:Rt'
SortUtil： XWp8[Cxs
S }`sp[6
package org.rut.util.algorithm; ^hC'\09=c
neDXzMxF
import org.rut.util.algorithm.support.BubbleSort; e{P v:jl
import org.rut.util.algorithm.support.HeapSort; +tqErh?Al
import org.rut.util.algorithm.support.ImprovedMergeSort; C|$qVh>
import org.rut.util.algorithm.support.ImprovedQuickSort; !.]JiT'o
import org.rut.util.algorithm.support.InsertSort; RwWg:4
import org.rut.util.algorithm.support.MergeSort; ' [ 4;QYw
import org.rut.util.algorithm.support.QuickSort; g\JJkXjD#
import org.rut.util.algorithm.support.SelectionSort; ^"/^)Lb!@M
import org.rut.util.algorithm.support.ShellSort; ATNOb
pIJXP$v3
/** O<gfZ>
* @author treeroot n{;j
* @since 2006-2-2 KQdIG9O+6
* @version 1.0 9Eyx Ob
*/ 1sQIfX#2f
public class SortUtil { bmfM_oz
public final static int INSERT = 1; }vd*eexA
public final static int BUBBLE = 2; 4>hHUz[_
public final static int SELECTION = 3; Eah6"j!B8n
public final static int SHELL = 4; {m.$EoS
public final static int QUICK = 5; -Aj)<KNx[
public final static int IMPROVED_QUICK = 6; gb ga"WO
public final static int MERGE = 7; 6[> lzEZ
public final static int IMPROVED_MERGE = 8; x*Lt]]A
public final static int HEAP = 9; ,5}U H
&],uD3:5O
public static void sort(int[] data) { >H2`4]4]
sort(data, IMPROVED_QUICK); RLB3 -=9t
} Jg6Lr~!i
private static String[] name={ WSkGVQu
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" nM )C^$3<t
}; ^mS |ff
&NE e-cb[
private static Sort[] impl=new Sort[]{ /0h *(nL
new InsertSort(), 3FEJ 9ZyG
new BubbleSort(), _FLEz|%~
new SelectionSort(), RgE`Hr
new ShellSort(), U2oCSo5:3N
new QuickSort(), &1xCPKIr
new ImprovedQuickSort(), *2'8d8>R%]
new MergeSort(), y7R#PkQ~
new ImprovedMergeSort(), Hd|l6/[xz
new HeapSort() `zwz
}; H"Pb)t
GP|=4T}Bf
public static String toString(int algorithm){ \U~4b_aN
return name[algorithm-1]; Zo9<96I&
} ^rkKE dd
vh9* >[i
public static void sort(int[] data, int algorithm) { hGRj
impl[algorithm-1].sort(data); v0^9"V:y
} N0U/u'J!g
Pf?kNJ*Tv)
public static interface Sort { l.[pnLD
public void sort(int[] data); ));#oQol9
} "cH RGJG#
T)C@6/
public static void swap(int[] data, int i, int j) { e_vsiT
int temp = data; )^h6'h`
data = data[j]; o9?@jjqH
data[j] = temp; cpY{o^
} xS18t="
} e5=d Ev