[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; a{rUk%x
} J}#2Wy^{
int i1=l; W5:fY>7
int i2=mid+1; ,7k1n{C)
for(int cur=l;cur<=r;cur++){ }?c%L8\
if(i1==mid+1) =]pEvj9o
data[cur]=temp[i2++]; ZZCm438
else if(i2>r) R1<$VR
data[cur]=temp[i1++]; ^~@3X[No
else if(temp[i1] data[cur]=temp[i1++]; ;<GxonIV
else JV'aqnb.8\
data[cur]=temp[i2++]; j*4:4B%
} 5tLb o
} |Sua4~yL(
=#<bB)59
} X{6a
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改进后的归并排序: $4)L~g|
r=AA /n<
package org.rut.util.algorithm.support; hk S:_e=
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import org.rut.util.algorithm.SortUtil; 0]=Bqyg
g)|vS>^~
/** k"/Rjd(;
* @author treeroot 9e vQQN6D|
* @since 2006-2-2 )N1iGJO)
* @version 1.0 v'^}zO
*/ Sl<1Rme=w
public class ImprovedMergeSort implements SortUtil.Sort { }#g+~9UK
ozl!vf# kv
private static final int THRESHOLD = 10; :2C <;o
>Q[ Z{
/* eQn[
* (non-Javadoc) ?cKTeGrS
* ,IE.8h)H
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) WpnP^gmX
*/ %f1IV(3Qc
public void sort(int[] data) { Hr!$mf)h
int[] temp=new int[data.length]; -Wh 2hWg+
mergeSort(data,temp,0,data.length-1); -o!bO9vC
} ?d{O'&|:
)EKWsGNe/
private void mergeSort(int[] data, int[] temp, int l, int r) { f\.y z[
int i, j, k; ]+B.=mO_
int mid = (l + r) / 2; ^W@%(,xb
if (l == r) (~E-=+R[$&
return; z5Tsu1c
if ((mid - l) >= THRESHOLD) t+]1D@hv
mergeSort(data, temp, l, mid); H=g%>W%3
else b0f6p>~q^
insertSort(data, l, mid - l + 1); |>m'szca4
if ((r - mid) > THRESHOLD) 8c_X`0jy
mergeSort(data, temp, mid + 1, r); i?uX'apk
else RO%M9LISI
insertSort(data, mid + 1, r - mid); !y'>sAf
Ht\2 IP
for (i = l; i <= mid; i++) { "Jg.)1Jw
temp = data; H270)Cwn+
} k*\)z\f
for (j = 1; j <= r - mid; j++) { 4gNN "
temp[r - j + 1] = data[j + mid]; J]{<Z?%
} z,2*3Be6V
int a = temp[l]; $ Y^0l
int b = temp[r]; p4UEhT
for (i = l, j = r, k = l; k <= r; k++) { re}PpXRC
if (a < b) { r)K5<[\r
data[k] = temp[i++]; [?O4l`
a = temp; 8"-=+w.CZ
} else { HIvSpO
data[k] = temp[j--]; u U>L (
b = temp[j]; p|mFF0SL
} (c^ {T)
} i^ |G
} 3/yt
dC-~=}HR^
/** KRcB_(
* @param data ',t*:GBZCf
* @param l ZZTf/s*
* @param i ]FIIs58IM
*/ ~K<h~TNP
private void insertSort(int[] data, int start, int len) { 3;> z %{
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); ]j6K3
} )cZHBG.0H
} .>.GQUr
} '`2MxRP
} xa<KF
O"\_%=X9
堆排序： Gau@RX:O
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package org.rut.util.algorithm.support; |O oczYf
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import org.rut.util.algorithm.SortUtil; w\eC{,00:
/4c`[
/** ?CC.xE
* @author treeroot T6=|)UTe1
* @since 2006-2-2 V+@}dJS
* @version 1.0 5y\35kT'
*/ 7Hgn/b[?b
public class HeapSort implements SortUtil.Sort{ rwP)TJh"
6-TYOUm
/* (non-Javadoc) 1IS1P)4_0
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ?b{y#du2a
*/ f5b|,JJ
public void sort(int[] data) { 3!fR'L/i
MaxHeap h=new MaxHeap(); cRD;a?0/6s
h.init(data); F --b,,
for(int i=0;i h.remove(); j%-Ems*H
System.arraycopy(h.queue,1,data,0,data.length); ~ho,bwJM[T
} F8{gJaP x
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private static class MaxHeap{ 3\ Mt+!1{
t!6uz
void init(int[] data){ a=A12<
this.queue=new int[data.length+1]; pI8z.JD
for(int i=0;i queue[++size]=data; Tj_K5uccU}
fixUp(size); 8]`s&d@GY
} GIcq|Pe
} zuW4gJ
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private int size=0; q0Q[]|L
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private int[] queue; .ve_If-Hg
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public int get() { U]vUa^nG
return queue[1]; .PVYYhrt
} M:%g)FgW
:/szA?:W
public void remove() { rg k1.0U0
SortUtil.swap(queue,1,size--); 3'`&D/n
fixDown(1); )xa)$u
} 24? _k]Y
file://fixdown FZ+2{wIV^
private void fixDown(int k) { aY(s &
int j; DT>`.y%2W
while ((j = k << 1) <= size) { F9K`N8wlu
if (j < size %26amp;%26amp; queue[j] j++; iv6G9e{cx
if (queue[k]>queue[j]) file://不用交换 ,&=7ir14>R
break; Xn%7{%;h
SortUtil.swap(queue,j,k); Ao`e{
k = j; IE996
} JmK )Y# A
} %M'`K
private void fixUp(int k) { wzwv>@}
while (k > 1) { a6./;OC
int j = k >> 1; 8w:mL^6x
if (queue[j]>queue[k]) __QnzEF
break; 6V1oZ-:}
SortUtil.swap(queue,j,k); ||pOiR5
k = j; Ua 6O~,\
} OEjX(F3=
} #@`c7SR
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} X;6;v]
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} =0Y0o_
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SortUtil： sfw*_}y
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package org.rut.util.algorithm; &`n:AR`
p19(>|$J
import org.rut.util.algorithm.support.BubbleSort; .$x}~Sw
import org.rut.util.algorithm.support.HeapSort; 9v*y&V9/
import org.rut.util.algorithm.support.ImprovedMergeSort; JluA?B7E
import org.rut.util.algorithm.support.ImprovedQuickSort; >W-xDzJry
import org.rut.util.algorithm.support.InsertSort; oYf+I
import org.rut.util.algorithm.support.MergeSort; juWXB+d2Y
import org.rut.util.algorithm.support.QuickSort; pqpsa'
import org.rut.util.algorithm.support.SelectionSort; ?#:']q
import org.rut.util.algorithm.support.ShellSort; vvxD}p=y
Lv/}&'\(
/** u;rmqo1
* @author treeroot RS}_cm0
* @since 2006-2-2 L3wj vq^
* @version 1.0 ]oSx]R>{f
*/ YQd($
public class SortUtil { xPUukmG:B
public final static int INSERT = 1; NJr)f
public final static int BUBBLE = 2; S>(xx"Ia
public final static int SELECTION = 3; FO^6c
public final static int SHELL = 4; Ayqs~&{
public final static int QUICK = 5; uIO,9> ee
public final static int IMPROVED_QUICK = 6; [j@i^B &
public final static int MERGE = 7; zzI,iEG
public final static int IMPROVED_MERGE = 8; 9M9Fif.
public final static int HEAP = 9; F#<:ZByjJ@
2D"my]FnF
public static void sort(int[] data) { `V V>AA5
sort(data, IMPROVED_QUICK); M$ieM[_T
} *'aJO}$
private static String[] name={ +,)k@OI
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" ll$mRC
}; uuFQTx))
WeH_1$n5
private static Sort[] impl=new Sort[]{ W[)HFh(#
new InsertSort(), hkb\GcOj
new BubbleSort(), kDmuj>D
new SelectionSort(), vqf}(/.D
new ShellSort(), $+44US
new QuickSort(), [3-u7Fx!
new ImprovedQuickSort(), .Er+*j;&w
new MergeSort(), 1/:vFX
new ImprovedMergeSort(), 6-"tQ,AZ
new HeapSort() P8dMfD*"E
}; s,[I_IiPf
-nC&t~sD
public static String toString(int algorithm){ e> 9X
return name[algorithm-1]; CckfoJ 9
} zsQkI@)sO
$=E4pb4Y
public static void sort(int[] data, int algorithm) { Lc}hjK
impl[algorithm-1].sort(data); L7rr/D
} 5TuwXz1v
e#mf{1&
public static interface Sort { <BBzv-?D
public void sort(int[] data); +0ukLc@
} .{8[o[w =
iCiKr aW
public static void swap(int[] data, int i, int j) { Y_y!$jd(N
int temp = data; iY@}Q "
data = data[j]; g_l-@
data[j] = temp; _7:Bxx4B
} *: FS/ir
} LNk :PD0m