[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; GK6CnSV8d
} jUR* |
int i1=l; Cw kQhj?
int i2=mid+1; ,1lW`Krx
for(int cur=l;cur<=r;cur++){ hE'7M;
if(i1==mid+1) 9f5~hBlo
data[cur]=temp[i2++]; "{H{-`Ni
else if(i2>r) ;E5XH"L\
data[cur]=temp[i1++]; t}pYSSTz
else if(temp[i1] data[cur]=temp[i1++]; c'Z)uquvP
else O&~ @ior
data[cur]=temp[i2++]; yfR0vp<&
} t7xJ"
} qs_cC3"=%=
b E40^e
} ^gpd '*b
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改进后的归并排序: p} eO
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package org.rut.util.algorithm.support; p:{L fQ
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import org.rut.util.algorithm.SortUtil; -;qK_x
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/** &G\C[L
* @author treeroot Jcs /i
* @since 2006-2-2 w-v8P`V
* @version 1.0 (I>SqM Y
*/ DZb0'+jQ
public class ImprovedMergeSort implements SortUtil.Sort { R3)ccom
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private static final int THRESHOLD = 10; }S13]Kk?=
wq1s#ag<
/* i??+5o@uTF
* (non-Javadoc) \Ov~ t
* <pS#wTsN4%
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) mYXL
*/ 6!*zgA5M'
public void sort(int[] data) { oq1wU@n
int[] temp=new int[data.length]; ?@Tsd@s~r
mergeSort(data,temp,0,data.length-1); t0P_$+w.>
} Tgi7RAY
u3&#UN
private void mergeSort(int[] data, int[] temp, int l, int r) { Pmr'W\aIR
int i, j, k; Nr]guC?rE
int mid = (l + r) / 2; wZ`{ i
if (l == r) $,I@c"m{
return; J^~J&
if ((mid - l) >= THRESHOLD) HoWK#Nz\
mergeSort(data, temp, l, mid); "EWq{l_I5$
else i-dosY`81
insertSort(data, l, mid - l + 1); 0 EA3>$;
if ((r - mid) > THRESHOLD) puEu)m^
mergeSort(data, temp, mid + 1, r); "l#"c{ee{
else pB%oFWqK
insertSort(data, mid + 1, r - mid); iP$>/[I
9uX15a
for (i = l; i <= mid; i++) { 0Q cJ Ek
temp = data; WBzPSnS2
} f&] !;)
for (j = 1; j <= r - mid; j++) { %)&Tr`
temp[r - j + 1] = data[j + mid]; Y2g%{keo
} u`!Dp$P
int a = temp[l]; X>]<rEh
int b = temp[r]; 2:yXeSeA
for (i = l, j = r, k = l; k <= r; k++) { Hbu :HFJ!
if (a < b) { v&f\ Jv7
data[k] = temp[i++]; n2[h`zm1{B
a = temp; &{q'$oF
} else { r.=.,R
data[k] = temp[j--]; C}9|e?R[Rz
b = temp[j]; MdTu722
} 3z"%ht~;
} 9}q)AL-ga
} a [f}-t9
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/** jD6T2K7i
* @param data `sd H q
* @param l <v\x<ul6
* @param i h 3 J&
*/ rvb@4-i>iI
private void insertSort(int[] data, int start, int len) { .n?i'8
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 'P%&*%
} 9wdX#=I
} 'RV wxd
} {OS[0LB
} D<*)^^
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堆排序： z`]:\j'O3"
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package org.rut.util.algorithm.support; _m%Ab3iT~
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import org.rut.util.algorithm.SortUtil; 9h6siK(F
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/** 4:kDBV;v
* @author treeroot y+Bxe)6^V
* @since 2006-2-2 JbXi|OS/
* @version 1.0 #VZ js`d6
*/ ~D/1U)kt
public class HeapSort implements SortUtil.Sort{ u|Ng>lU
]2iEi`"[
/* (non-Javadoc) j& L@L.d
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 1h{7dLA
*/ %V#? 1{
public void sort(int[] data) { j`MK\*qmz
MaxHeap h=new MaxHeap(); #"[EVF0%1D
h.init(data); 5tY/d=\k
for(int i=0;i h.remove(); ~!/agLwY
System.arraycopy(h.queue,1,data,0,data.length); V7 hO}
} jk%H+<FU`
acj-*I
private static class MaxHeap{ c/Li,9cT'
L#!m|_Mz
void init(int[] data){ NpS =_QeNw
this.queue=new int[data.length+1]; |jcIn[)=
for(int i=0;i queue[++size]=data; aTBFF
fixUp(size); TT&%[A+
} ]?Q<lMG
} ?&VKZSo
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private int size=0; ( F4c0
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private int[] queue; $1k@O@F(4
C8} ;,
public int get() { q&LCMnv"P
return queue[1]; NT9|``^Z
} S{,|Fa^PPO
P5lk3Zg'
public void remove() { EWOa2^%}Z\
SortUtil.swap(queue,1,size--); Xu|2@?l9
fixDown(1); V$dhiP z
} &+yoPF
file://fixdown F;BCSoO4
private void fixDown(int k) { a`LkP%
int j; \(r$f!`
while ((j = k << 1) <= size) { Hk=HO|&<XB
if (j < size %26amp;%26amp; queue[j] j++; =uR3|U(.|u
if (queue[k]>queue[j]) file://不用交换 v3<q_J'qT
break; o1uM(
SortUtil.swap(queue,j,k); 'c3'eJ0
k = j; Q&/WVRD
} rU1Ri
} "|V}[ 2
private void fixUp(int k) { ^|2m&2
while (k > 1) { n+k,:O5
int j = k >> 1; )RQQhB
if (queue[j]>queue[k]) js%n]$N
break; |f(*R_R
SortUtil.swap(queue,j,k); Hlpt zez
k = j; M0`1o p1
} '~1Zr uO
} Ty7)j]b"zl
0?O_]SD
} DhD##5a
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} kO$n0y5e
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SortUtil： {SD%{
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package org.rut.util.algorithm; ~ H/ZiBL@
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import org.rut.util.algorithm.support.BubbleSort; [70 5[
import org.rut.util.algorithm.support.HeapSort; $RUK<JN$6
import org.rut.util.algorithm.support.ImprovedMergeSort; m_,Jbf
import org.rut.util.algorithm.support.ImprovedQuickSort; 5u3KL A
import org.rut.util.algorithm.support.InsertSort; [(&aVHUj
import org.rut.util.algorithm.support.MergeSort; 4t3>`x 7
import org.rut.util.algorithm.support.QuickSort; JAT%s %UC
import org.rut.util.algorithm.support.SelectionSort; $`lm]} {&
import org.rut.util.algorithm.support.ShellSort; 2A9crL$
*xY3F8
/** 1kR. .p<"
* @author treeroot '?g&);4)k-
* @since 2006-2-2 Wh~,?}laj
* @version 1.0 owb+,Gk(
*/ C ,|9VH
public class SortUtil { zQ<;3+*
public final static int INSERT = 1; 5%}!z~8Y4
public final static int BUBBLE = 2; S.q0L
public final static int SELECTION = 3; ,KU%"{6
public final static int SHELL = 4; UBk:B
public final static int QUICK = 5; oN%zpz;OR
public final static int IMPROVED_QUICK = 6; ]cVDXLj$
public final static int MERGE = 7; oe0YxSauL
public final static int IMPROVED_MERGE = 8; T<NOLfk66
public final static int HEAP = 9; .D\oKhV(
'cQ,;y
public static void sort(int[] data) { 5SmJ'zFO
sort(data, IMPROVED_QUICK); dQ9W40g1
} [Q J
private static String[] name={ `!(%Rk
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" } #L_R
}; /e*fsQ>M:
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private static Sort[] impl=new Sort[]{ @+Sr~:K
new InsertSort(), o?j8"^!7
new BubbleSort(), %e3E}m>
new SelectionSort(), _ qwf3Q@
new ShellSort(), )N607 Fa-
new QuickSort(), <r`;$K
new ImprovedQuickSort(), "@/pQoLy
new MergeSort(), uOy/c 8`
new ImprovedMergeSort(), >goHQ30:
new HeapSort() ^;.u}W
}; 3EY m@oZj
2FV@?x0po
public static String toString(int algorithm){ yFQaNuZPC
return name[algorithm-1]; yNn=r;FZQ
} }#%YeCA?
vyB{35p$
public static void sort(int[] data, int algorithm) { \%.oi@A
impl[algorithm-1].sort(data); y'I m/{9U
} 96QY0
hsS&|7Pt
public static interface Sort { +PI}$c-|`
public void sort(int[] data); r jxkgd
} A#19&}
,Owk;MV@
public static void swap(int[] data, int i, int j) { BX[IWP\%
int temp = data; WcKDerc
data = data[j]; QH(&Cu,
data[j] = temp; b=MW;]F
} {*O+vtir%
} |U{~t<BF#