[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; Z2H bAI8
} U,61 3G
int i1=l; nKnrh]hX
int i2=mid+1; eMmNQRmH
for(int cur=l;cur<=r;cur++){ #d/T7c#
if(i1==mid+1) ~UNha/nt
data[cur]=temp[i2++]; l(}L-:@A
else if(i2>r) _2{_W9k
data[cur]=temp[i1++]; / #rH18
else if(temp[i1] data[cur]=temp[i1++]; h{$k%YJ?
else 0( A ?&
data[cur]=temp[i2++]; H{S+^'5Y.
} kS9;Tjcx
} 6akI5\b
$?]`2*i
} SBs!52
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改进后的归并排序: BT_XqO
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package org.rut.util.algorithm.support; (6:.u.b
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import org.rut.util.algorithm.SortUtil; 0chpC)#Q3;
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/** HpfZgkC+
* @author treeroot H)"]I3
* @since 2006-2-2 vD?D]8.F~Q
* @version 1.0 $e--"@[Y
*/ Gau@RX:O
public class ImprovedMergeSort implements SortUtil.Sort { EJb+yy6
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private static final int THRESHOLD = 10; Yg,b ;H
ju"?b2f
/* bDJ!Fc/
* (non-Javadoc) T6=|)UTe1
* -o`K/f}d
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) QJrXn6`
*/ b7~Jl+m
public void sort(int[] data) { Iz. h
int[] temp=new int[data.length]; cg17e
mergeSort(data,temp,0,data.length-1); d^!k{Qx'
} I}0?d
d,(q3
private void mergeSort(int[] data, int[] temp, int l, int r) { U1E@pDH
int i, j, k; v{uq
int mid = (l + r) / 2; 2rf8)8':
if (l == r) n8_X<jIp3
return; =N{?ll6x7g
if ((mid - l) >= THRESHOLD) :l!sKT?:d!
mergeSort(data, temp, l, mid); /#(IV_Eol
else k}&wy
insertSort(data, l, mid - l + 1); Ka-o$o[^u`
if ((r - mid) > THRESHOLD) JehanF[
mergeSort(data, temp, mid + 1, r); ]Sa#g&}T>
else 8]`s&d@GY
insertSort(data, mid + 1, r - mid); GIcq|Pe
zuW4gJ
for (i = l; i <= mid; i++) { HR8YPU5
temp = data; I *sT*;U
} 8Q<Nl=g>'
for (j = 1; j <= r - mid; j++) { X1a~l|$h
temp[r - j + 1] = data[j + mid]; CrL9|78
} ]BbV\#
int a = temp[l]; 3%1wQXr0
int b = temp[r]; A46q`l9B
for (i = l, j = r, k = l; k <= r; k++) { jdu6P+_8n
if (a < b) { lnyq%T[^
data[k] = temp[i++]; 8~R.iqLoX
a = temp; p#]9^oA
} else { <3@nv%
data[k] = temp[j--]; !-470J
b = temp[j]; ol/@)k^s>
} nAl \9#M
} L FJ@4]%V
} +pYwc0~
0=6mb]VUi=
/** _BerHoQd
* @param data V*Fy@
* @param l 5YNAb/!!F
* @param i "N=$=Dy>
*/ ]wEI*c(
private void insertSort(int[] data, int start, int len) { JmK )Y# A
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); %M'`K
} wzwv>@}
} a6./;OC
} Ib{l$#
} tugIOA
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堆排序： CkNR{?S
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package org.rut.util.algorithm.support; :LNZC,-f}5
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import org.rut.util.algorithm.SortUtil; @YH>|{S&
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/** ov,
* @author treeroot BF gxa#De
* @since 2006-2-2 S}U_uZ$b
* @version 1.0 Y 'X!T8
*/ "i/GzD7`n
public class HeapSort implements SortUtil.Sort{ hDW_a y4
yGt[Qvx#
/* (non-Javadoc) Ew PJ|Z^
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) <_|@~^u
*/ Tr:@Dv.O
public void sort(int[] data) { oYf+I
MaxHeap h=new MaxHeap(); juWXB+d2Y
h.init(data); pqpsa'
for(int i=0;i h.remove(); h;+O96V4.
System.arraycopy(h.queue,1,data,0,data.length); >TCit1yD
} G`0{31us
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private static class MaxHeap{ .U|'KCM9m
!w%c=V]tV
void init(int[] data){ 8gEp5
this.queue=new int[data.length+1]; .txtt?ZF2
for(int i=0;i queue[++size]=data; 6IT6EkiT
fixUp(size); Kn5C
} 'R+^+urq^
} VpHwc!APq
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private int size=0; ((`{-y\K
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private int[] queue; 2(3Q#3V
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public int get() { iz/CC V L
return queue[1]; |&MoQxw@
} TK' 5NM+4
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public void remove() { 3T]cDVQ_
SortUtil.swap(queue,1,size--); hkb\GcOj
fixDown(1); ?87\_wL/j
} G5t7KI
file://fixdown N-F&=u}
private void fixDown(int k) { DKMkCPX%
int j; ~?b1x+soV
while ((j = k << 1) <= size) { qG 20
if (j < size %26amp;%26amp; queue[j] j++; }#e=*8F7
if (queue[k]>queue[j]) file://不用交换 _^b\#Jz4U3
break; ]O:8o<0
SortUtil.swap(queue,j,k); ]rY9t@
k = j; 'G % ]/'_U
} $=E4pb4Y
} mMZ{W+"[f
private void fixUp(int k) { wj}LVyV
while (k > 1) { $X)|`$#pL#
int j = k >> 1; b1IAp>*2l
if (queue[j]>queue[k]) ]JGq{I>%+6
break; jsgDJ}
SortUtil.swap(queue,j,k); R#~l[S8u^
k = j; l 7dm@S
} 3 I%N4K4
} l{8O'4;
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} B!quj!A
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} RY)x"\D
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SortUtil： ]Ri=*KZa
xV14Y9
package org.rut.util.algorithm; .bp#YU,m
58#nYt
import org.rut.util.algorithm.support.BubbleSort; [W$Mn.5<s
import org.rut.util.algorithm.support.HeapSort; )_!a:
import org.rut.util.algorithm.support.ImprovedMergeSort; S#p_Y^A
import org.rut.util.algorithm.support.ImprovedQuickSort; z0ufLxq
import org.rut.util.algorithm.support.InsertSort; sXPva@8_
import org.rut.util.algorithm.support.MergeSort; 3A"TpR4f`
import org.rut.util.algorithm.support.QuickSort; Kzq^f=p
import org.rut.util.algorithm.support.SelectionSort; ynMYf
import org.rut.util.algorithm.support.ShellSort; ,Q Ge=Exn
'Bt!X^
/** Gy["_;+xU
* @author treeroot .c<U5/
* @since 2006-2-2 R1Rk00Ow:
* @version 1.0 _/P;`@
*/ F)eP55C6
public class SortUtil { V[WZ#u-p
public final static int INSERT = 1; Vtj*O'0
public final static int BUBBLE = 2; A~>B?Wijqg
public final static int SELECTION = 3; ?rt[ aK
public final static int SHELL = 4; =>'j_|
public final static int QUICK = 5; PEjd
public final static int IMPROVED_QUICK = 6; q*4@d)_&
public final static int MERGE = 7; 'Tqusr>lPY
public final static int IMPROVED_MERGE = 8; n9&fH
public final static int HEAP = 9; [=cbzmX[
&*O'qOO<2
public static void sort(int[] data) { 7],y(:[=v
sort(data, IMPROVED_QUICK); P;gd!Yl<-
} {*hGe_^
private static String[] name={ {y@8E>y5$
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" =$#5Ge]b
}; kl1Q:
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private static Sort[] impl=new Sort[]{ ea$. +
new InsertSort(), sEw ?349Bz
new BubbleSort(), Xu#?Lw
new SelectionSort(), 3My}u>
new ShellSort(), IR2Qc6+{
new QuickSort(), Bo ywgL|
new ImprovedQuickSort(), #>~A-k)
new MergeSort(), >^#Liwm
new ImprovedMergeSort(), bY,dWNS:
new HeapSort() UHfE.mTjM
}; G;/> N'#
L*6<h
public static String toString(int algorithm){ ^P [#YO
return name[algorithm-1]; A`(Cuw-o
} 6yYd~|T.Fl
n?q+:P
public static void sort(int[] data, int algorithm) { s`,g4ce`
impl[algorithm-1].sort(data); d,meKQn
} :D2GLq*\
!]mo.zDSW5
public static interface Sort { Q9p2.!/C1
public void sort(int[] data); kMEXgzl
} 3ErV" R4"$
~tW<]l7
public static void swap(int[] data, int i, int j) { 3_ E}XQd
int temp = data; +W-b3R:1>
data = data[j]; jL3 *m
data[j] = temp; '_K`1&#U
} zh?B-"O=5
} -g9CW[