[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; }d$-:l,w
} ?ukw6T
int i1=l; ?Ua,ba*
int i2=mid+1; S_}`'Z )
for(int cur=l;cur<=r;cur++){ Cj5mM[:s
if(i1==mid+1) :<%bAn
data[cur]=temp[i2++]; t=_^$M,yr
else if(i2>r) K^-1M?
data[cur]=temp[i1++]; w~'xZ?
else if(temp[i1] data[cur]=temp[i1++]; f|RmAP;X,
else *Cy54Z#
data[cur]=temp[i2++]; +A9~h/"kt
} $ /VQsb
} [P$Xr6#
UA[`{rf
} %>_[b,
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改进后的归并排序: f^c+M~\JKj
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package org.rut.util.algorithm.support; {C1crp>q
A~ya{^}
import org.rut.util.algorithm.SortUtil; 3? {AGJ1
k.T=&0J_1
/** e3~MU6
* @author treeroot >mGH4{H
* @since 2006-2-2 8\"<t/_ W
* @version 1.0 Kg@'mG
*/ f%Q)_F[0D4
public class ImprovedMergeSort implements SortUtil.Sort { jm0p%%z
_=v#"l
private static final int THRESHOLD = 10; +z >)'#
OG\i?N
/* )0{`}7X
* (non-Javadoc) QV4|f[Ki%
* m0HK1'
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) .hTqZvDa
*/ Q=~"xB8
public void sort(int[] data) { PK*Wu<<
int[] temp=new int[data.length]; \0$+*ejz
mergeSort(data,temp,0,data.length-1); Q PH=`s
} [g}Cve#i
_\!]MV
private void mergeSort(int[] data, int[] temp, int l, int r) { ,GbmL8P7Y
int i, j, k; 56.!L
int mid = (l + r) / 2; &(F c .3m
if (l == r) U,<m%C"
return; p8Vqy-:
if ((mid - l) >= THRESHOLD) OvfluFu7
mergeSort(data, temp, l, mid); F!z0N&#
else oqrx7+0{
insertSort(data, l, mid - l + 1); V^~RDOSy7n
if ((r - mid) > THRESHOLD) vEv kC
mergeSort(data, temp, mid + 1, r); FaHOutP
else =~^b
insertSort(data, mid + 1, r - mid); =?sG~
/\J0)V
for (i = l; i <= mid; i++) { @!ChPl
temp = data; c-Gp|.C
} gF6> /
for (j = 1; j <= r - mid; j++) { .qBc;u
temp[r - j + 1] = data[j + mid]; W/'1ftn?D
} 0cG'37[
int a = temp[l]; j,n:%5P\v
int b = temp[r]; Xfiwblg
for (i = l, j = r, k = l; k <= r; k++) { ]HKt7 %,
if (a < b) { jP@ @<dt
data[k] = temp[i++]; {QG.> lB
a = temp; a`O'ZY
} else { .jrNi=BP*
data[k] = temp[j--]; Q3@zUjq_Q
b = temp[j]; -FeXG#{)
} <z Gh}.6v
} R >xd*A
} Y;'<u\^M"
A U~DbU0O
/** ( eV,f
* @param data *&U~Io"U
* @param l *>fr'jj1$
* @param i *^>" h@J
*/ +VwQ=[y]
private void insertSort(int[] data, int start, int len) { y6(PG:L
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); {!,K[QwcI
} 6<&~R3dQ
} KsDS!O
} U}92%W?
} hBgE%#`s
dX(JV' 18A
堆排序： +p u[JHF
{3Inj8a=?A
package org.rut.util.algorithm.support; 1U\ap{z@
]#0 (
import org.rut.util.algorithm.SortUtil; ?m7:@GOE1
l9K`+c+t
/** ZL|aB886
* @author treeroot wMS%/l0p1
* @since 2006-2-2 ]n^iG7aB?
* @version 1.0 q4ROuE|d
*/ @ @[xTyA
public class HeapSort implements SortUtil.Sort{ Nt>^2Mv
fit{n]g
/* (non-Javadoc) EJ:O 1
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Y6{^cZ!=
*/ M7#!Y=
public void sort(int[] data) { m8n)sw,,
MaxHeap h=new MaxHeap(); `_/bg(E
h.init(data); --h\tj\U
for(int i=0;i h.remove(); ^ h=QpH
System.arraycopy(h.queue,1,data,0,data.length); 2D 4,#X
} LV}R 9f
SYJO3cY
private static class MaxHeap{ -()WTdIy
c~0kZA6
void init(int[] data){ m*^)#
this.queue=new int[data.length+1]; zt.kNb
for(int i=0;i queue[++size]=data; OqtGKda
fixUp(size); ^*.[b
} Ai/X*y:[?
} (\\;A?
D4%J!L<P
private int size=0; @3`5(xwzm
=rKJJa N
private int[] queue; b.*LmSX#
Q)75?mn
public int get() { yan^\)HZ
return queue[1]; \Qml~?$@lH
} tYA@J["^
?Y"%BS+pt
public void remove() { 161P%sGx2
SortUtil.swap(queue,1,size--); ,Ckcc
fixDown(1); !Asncc G
} TY8gB!^
file://fixdown _a09;C
private void fixDown(int k) { qu B[S)2}
int j; %.Y5%TyP
while ((j = k << 1) <= size) { 'LgRdtO6
if (j < size %26amp;%26amp; queue[j] j++; 9xA4;)36
if (queue[k]>queue[j]) file://不用交换 Hf4_zd
break; {Y~>&B5
SortUtil.swap(queue,j,k); W3:j Z:
k = j; ZRMim6a4X
} vQrxx
} FJ_JaIby
private void fixUp(int k) { B=A!hXNa
while (k > 1) { w/@ZPBRo]
int j = k >> 1; n#!c!EfG
if (queue[j]>queue[k]) }s,NM%oI
break; 8}n<3_
SortUtil.swap(queue,j,k); 0zW*JJxV
k = j; ]B>76?2W
} !MoAga_ j
} t6Iy5)=zY
BU -;P
} t/|0"\ p
gIo\^ktW
} WI\a
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SortUtil： h,/Aq
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package org.rut.util.algorithm; ^ZMbJe%L
rrL.Y&DTK
import org.rut.util.algorithm.support.BubbleSort; [,Ehu<mEK
import org.rut.util.algorithm.support.HeapSort; L<FXtBJ
import org.rut.util.algorithm.support.ImprovedMergeSort; Bx45yaT
import org.rut.util.algorithm.support.ImprovedQuickSort; A]c'TT@6
import org.rut.util.algorithm.support.InsertSort; bM?gAY]mB8
import org.rut.util.algorithm.support.MergeSort; 7O1MC 8{
import org.rut.util.algorithm.support.QuickSort; '$FF/|{
import org.rut.util.algorithm.support.SelectionSort; ;nSF\X(;{
import org.rut.util.algorithm.support.ShellSort; py;p7y!gxA
E#!N8fQ
/** 2^[dy>[y0
* @author treeroot YR'F]FI
* @since 2006-2-2 h,c*:
* @version 1.0 @c^ Dl
*/ #mV2VIX#Jv
public class SortUtil { W&5/1``u\
public final static int INSERT = 1; >/ay'EyY;>
public final static int BUBBLE = 2; '0Cp
public final static int SELECTION = 3; ,HP }}K+S
public final static int SHELL = 4; ^E^`"
public final static int QUICK = 5; J9lZ1,22
public final static int IMPROVED_QUICK = 6; 4iAF<|6s
public final static int MERGE = 7; :#:|:q.]
public final static int IMPROVED_MERGE = 8; MpOU>\
public final static int HEAP = 9; hs7!S+[.$$
N sdpE?V
public static void sort(int[] data) { g8O6 b
sort(data, IMPROVED_QUICK); W ^'|{9&m
} eN])qw{
private static String[] name={ U:8[%a
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" t7byOMC
}; "$(+M t^
mx^Ga=: ?
private static Sort[] impl=new Sort[]{ \3hA_{ w
new InsertSort(), ^QNc!{`
new BubbleSort(), ZiUb+;JA
new SelectionSort(), yzN[%/
new ShellSort(), 1AAyzAP9`
new QuickSort(), i#-v4g
new ImprovedQuickSort(), \Th<7WbR6#
new MergeSort(), y,5qY}P+
new ImprovedMergeSort(), wPg/.N9H
new HeapSort() /\%<VBx ?q
}; \Kf\%Q
)- W1Wtom
public static String toString(int algorithm){ zT>!xGTu7~
return name[algorithm-1]; 6*i**
} d-b04Q7DQ
K/W=r
public static void sort(int[] data, int algorithm) { uHU@j(&c
impl[algorithm-1].sort(data); s|p I`
} sZrVANyqb
TAXsL&Tz>
public static interface Sort { 2 GRI<M
public void sort(int[] data); g-qXS]y7
} >NUbk9}J4
_:Qh1&h
public static void swap(int[] data, int i, int j) { krfXvQJwJ
int temp = data; .D W>c}1
data = data[j]; o-6d$c}{f
data[j] = temp; `<9>X9.+
} H*0Y_H=
} 9rEBq&