[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; lF;ziF
} `YFkY^T
int i1=l; ALE808;|
int i2=mid+1; vO}qjw
for(int cur=l;cur<=r;cur++){ pTa'.m
if(i1==mid+1) !7:EE,W~
data[cur]=temp[i2++]; ^Ei*M0fF
else if(i2>r) NDB*BmG
data[cur]=temp[i1++]; MAuM)8_P/|
else if(temp[i1] data[cur]=temp[i1++]; 'sm[CNzS
else >VRo|o<D
data[cur]=temp[i2++]; f0-RhR
} T4V[RN
} r\A@&5#q
3gxf~$)?
} B]'e$uyL7
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改进后的归并排序: v;)BVv
XoDJzrL#
package org.rut.util.algorithm.support; .Lr`j8
oS[W*\7'!
import org.rut.util.algorithm.SortUtil; P\D[n-&
|x1$b7
/** 06PhrPVa!\
* @author treeroot y,'FTP9?
* @since 2006-2-2 k)$iK2I
* @version 1.0 %3]3r*e&5
*/ aj&\CJ
public class ImprovedMergeSort implements SortUtil.Sort { \1=T sU&^
D"`%|`O
private static final int THRESHOLD = 10; Zr\2BOcc.l
'9^E8+=|
/* Hm.X}HO0L
* (non-Javadoc) Ly^E& ,)
* jFgZ}Xp
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) L=d$"Q
*/ s ;48v
public void sort(int[] data) { MNkKy(Za
int[] temp=new int[data.length]; t@X M /=d
mergeSort(data,temp,0,data.length-1); DY$yiOH9
} =fY lzZh
HkW/G[7x&
private void mergeSort(int[] data, int[] temp, int l, int r) { ^%-NPo<
int i, j, k; [Dnusp7e
int mid = (l + r) / 2; eT;AAGql
if (l == r) [fd~nD#.
return; *hV4[=
if ((mid - l) >= THRESHOLD) H!p!sn
mergeSort(data, temp, l, mid); fwRGT|":B
else k"t>He
insertSort(data, l, mid - l + 1); @=CLeQG`
if ((r - mid) > THRESHOLD) 7^HpVcSM
mergeSort(data, temp, mid + 1, r); Z&TD+fT<
else sc<kiL
insertSort(data, mid + 1, r - mid); STv(kQs
r~I.F!{
for (i = l; i <= mid; i++) { FSv1X
temp = data; #U\$@4D
} :g&>D#{
for (j = 1; j <= r - mid; j++) { =1O?jrl~q
temp[r - j + 1] = data[j + mid]; Bhj:9%`
} M\I_{Q?_
int a = temp[l]; X#VEA=4{
int b = temp[r]; ma3Qi/
for (i = l, j = r, k = l; k <= r; k++) { <Uf|PFVj$
if (a < b) { Tu==49
data[k] = temp[i++]; n>n"{!
a = temp; gEE9/\>%-
} else { 8`a,D5U:
data[k] = temp[j--]; P?xA$_+
b = temp[j]; @ozm;
} (yfXMp,x
} f;R>Pr;rD
} ZH% we
Il|GCj*N
/** _<XgC\4O|
* @param data li@kLh
* @param l #T[%6(QW
* @param i UBa-
*/ l4zw]AYk+X
private void insertSort(int[] data, int start, int len) { R^uc%onP
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); {QMN=O&n
} 1PmX."a
} % ^e@`0L
} yk`)Cq%=;
} <vL}l:r
Ll?g.z"
堆排序： SijS5irfk
mLQUcYfR
package org.rut.util.algorithm.support; loLKm]yV
/ xs9.w8-
import org.rut.util.algorithm.SortUtil; 0juDuE?
pcNSL'u+
/** y>)MAzz~\
* @author treeroot 1b8c67j[
* @since 2006-2-2 1EQvcw#
* @version 1.0 v:?o3 S
*/ tR5tPPw
public class HeapSort implements SortUtil.Sort{ dt<~sOT3s
G8noQ_-
/* (non-Javadoc) VJ*\pM@no
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) I'?6~Sn3
*/ svqvG7
public void sort(int[] data) { tq0;^L
MaxHeap h=new MaxHeap(); I ld7}R
h.init(data); UTvs |[
for(int i=0;i h.remove(); i_NJ -K
System.arraycopy(h.queue,1,data,0,data.length); IKo;9|2U
} cFDxjX?~
}f]b't
private static class MaxHeap{ %2}C'MqS
Fav^^vf*1
void init(int[] data){ `On3/gU|
this.queue=new int[data.length+1]; 9{$8\E9*nd
for(int i=0;i queue[++size]=data; z,avQR&
fixUp(size); }I]W'<jY
} 3T?f5+@I
} ydB$4ZB3[
'bC]M3P
private int size=0; 'g~@"9'oe
_;7fraqX
private int[] queue; u0g*O]Y
G0pBR]_5z$
public int get() { -,|ha>r
return queue[1]; gvGi%gq
} |Q5+l.%
BJgDo
public void remove() { M7vj^mt?
SortUtil.swap(queue,1,size--); C38%H
fixDown(1); Mc:bU
} xHe^"LL
file://fixdown 06jMj26!
private void fixDown(int k) { ~{P:sjsU
int j; [Y$V\h=V
while ((j = k << 1) <= size) { -%H%m`wD
if (j < size %26amp;%26amp; queue[j] j++; k2.G%]j
if (queue[k]>queue[j]) file://不用交换 Mi?}S6bp
break; +9C;<f
SortUtil.swap(queue,j,k); ED/FlL{
k = j; +sRP<as
} 4'm q_o#4W
} {_(+>v"eJ
private void fixUp(int k) { p-Pz=Cx-
while (k > 1) { lJ&y&N<O
int j = k >> 1; x6%#wsvS
if (queue[j]>queue[k]) p[-{]!
break; # 66e@
SortUtil.swap(queue,j,k); m8HYWzN
k = j; (6clq:c7j
} B2(,~^39
} iadkH]w
Z/7dg-$?'0
} 0;<OYbm3<
1eD.:_t4
} N~| t!G*9
[e1L{_*l
SortUtil： nB&j
;wgFr.#hp@
package org.rut.util.algorithm; W>/UBN3
3Oiy)f@{TF
import org.rut.util.algorithm.support.BubbleSort; $H;+}VQ
import org.rut.util.algorithm.support.HeapSort; Jn#K0(FQ
import org.rut.util.algorithm.support.ImprovedMergeSort; 8^vArS;
import org.rut.util.algorithm.support.ImprovedQuickSort; :1MMa6
import org.rut.util.algorithm.support.InsertSort; +$,dwyI2t
import org.rut.util.algorithm.support.MergeSort; 3\+N`!
import org.rut.util.algorithm.support.QuickSort; ]7vf#1i<
import org.rut.util.algorithm.support.SelectionSort; 7xT[<?,
import org.rut.util.algorithm.support.ShellSort; l"5y?jT
agT7=hX].
/** x5F@ad9
* @author treeroot 8[R1A
* @since 2006-2-2 IN_gF_@%
* @version 1.0 g`3H(PVg
*/ ]! )xr
public class SortUtil { l{Er+)a
public final static int INSERT = 1; (}jL_E
public final static int BUBBLE = 2; }NwN2xTB
public final static int SELECTION = 3; |^iA6)Q
public final static int SHELL = 4; iC*U$+JG
public final static int QUICK = 5; 5~s{N
public final static int IMPROVED_QUICK = 6; vi|Zit
public final static int MERGE = 7; wT/6aJoX
public final static int IMPROVED_MERGE = 8; <T4(H[9B
public final static int HEAP = 9; QptOQ3!
1R^4C8*B
public static void sort(int[] data) { ]3+``vL
sort(data, IMPROVED_QUICK); b{pg!/N4
} <4f,G]UH_
private static String[] name={ Kj!Y K~~
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" #_fY4vEO
}; OZT^\Ky_l
4E'|.tt(
private static Sort[] impl=new Sort[]{ 85hQk+Bu4
new InsertSort(), jsdBd2Gdc
new BubbleSort(), "5|\X<f
new SelectionSort(), J7n5Ps\M
new ShellSort(), N7pt:G2~%
new QuickSort(), PG"@A
new ImprovedQuickSort(), QnU0"_-
new MergeSort(), ~6sE an3p
new ImprovedMergeSort(), qHJ'1~?q
new HeapSort() \u8,!) 4i
}; HlRAD|]\
QkE,T0,/?h
public static String toString(int algorithm){ :'Xr/| s
return name[algorithm-1]; +V1}@6k :
} R,b59,&3/
^ $wJi9D6
public static void sort(int[] data, int algorithm) { {+\'bIV[
impl[algorithm-1].sort(data); `j:M)2:*y
} 0I^Eo|
4 l1 i>_R
public static interface Sort { QT;Va#a
public void sort(int[] data); |z+9km7,
} @>:i-5
VF=Z`
public static void swap(int[] data, int i, int j) { hHEPNR[.
int temp = data; ,ey0:.!;
data = data[j]; A;T[['
data[j] = temp; B-dlm8gX
} C#$6O8O
} 0d`5Gy_D%