[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; Dp6"I!L<|
} 5~R{,]52
int i1=l; BiLreZ~"
int i2=mid+1; FivaCNA
for(int cur=l;cur<=r;cur++){ :ktX7p~
if(i1==mid+1) !/(}meZj
data[cur]=temp[i2++]; O>F.Wf5g
else if(i2>r) I8%'Z>E(
data[cur]=temp[i1++]; Cg\)BHv~
else if(temp[i1] data[cur]=temp[i1++]; ieF 0<'iF
else .-26 N6S
data[cur]=temp[i2++]; v*]Xur6e}
} YK+Z0ry
} <C`eZ}Qqv
r|F,\fF
} >E,L"&_j
BHE =Zo
改进后的归并排序: >]|^Ux,WZ
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package org.rut.util.algorithm.support; ?'#;Y"RT
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import org.rut.util.algorithm.SortUtil; Jsnmn$C
[[DFEvOEh
/** ?#c@Ag%
* @author treeroot `V_/Cz_}D
* @since 2006-2-2 :3*oAh8|
* @version 1.0 %mvx}xV
*/ NGQIoKC
public class ImprovedMergeSort implements SortUtil.Sort { ]{U*+K%,J
6)<oO(
private static final int THRESHOLD = 10; i&Cqw~.H
tJ_@AcF
/* 4sE=WPKF#
* (non-Javadoc) -^ ayJ73
* $I0a2Z=dP
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) J& SuUh<
*/ z}N^`_ *
public void sort(int[] data) { &J@ZF<Ib
int[] temp=new int[data.length]; yWk:u 5
mergeSort(data,temp,0,data.length-1); CKt~#$ I%
} h?tV>x/Fu
W",jZ"7
private void mergeSort(int[] data, int[] temp, int l, int r) { >Ez}r(QQ^
int i, j, k; ghQsS|)p.
int mid = (l + r) / 2; M6Z`Pwv];
if (l == r) !3M!p&
return; 95&sFT C
if ((mid - l) >= THRESHOLD) J 2~B<=V
mergeSort(data, temp, l, mid); 4i&!V9@:
else pR7G/]U$A
insertSort(data, l, mid - l + 1); ct/THq
if ((r - mid) > THRESHOLD) Z$K%@q,10+
mergeSort(data, temp, mid + 1, r); {cHTg04
else K{h]./%
insertSort(data, mid + 1, r - mid); Cu<ojN- $
.z7f_KX^
for (i = l; i <= mid; i++) { W]7?;#Hpk
temp = data; /!8:/7r+W
} F qyJ*W\1
for (j = 1; j <= r - mid; j++) { by ee-BU
temp[r - j + 1] = data[j + mid]; F+-MafN7Y
} 2p.+C35c=j
int a = temp[l]; 8>+eGz|
int b = temp[r]; [~JN n
for (i = l, j = r, k = l; k <= r; k++) { >Nqkz?67
if (a < b) { @,$HqJ
data[k] = temp[i++]; ky"7 ^
a = temp; fb=vO U
} else { l{{ #tW
data[k] = temp[j--]; X KeK;+
b = temp[j]; EqwA8?M
} r 24]2A
} 0d)n}fm
} UM^hF%
5S?Xl|8E
/** t?&ajh
* @param data *g.,[a0
* @param l CA~S$H\"
* @param i > _) a7%
*/ \05C'z3]
private void insertSort(int[] data, int start, int len) { uB!P>v6
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); O4URr
} t)b>f~
} :P'5_YSi
} [qo*,CRz
} Qd=/e pkm
8[XNFFUZs
堆排序： .^W0;ISX
p{u}t!`!d
package org.rut.util.algorithm.support; E_*T0&P.P
aMD?^
import org.rut.util.algorithm.SortUtil; }trMQ
ld0WZj
/** }Q*ec/^{f
* @author treeroot sbb{VV`I
* @since 2006-2-2 FpYoCyD}
* @version 1.0 I!%@|[ Ow
*/ `Q[$R&\
public class HeapSort implements SortUtil.Sort{ e=C,`&sz
\Bf{/r5x
/* (non-Javadoc) ON^u|*kO
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) g:V6B/M&
*/ ;0WlvKF
public void sort(int[] data) { <CdO& xUY
MaxHeap h=new MaxHeap(); <7h'MNf&
h.init(data); }:Akpm
for(int i=0;i h.remove(); }?$Mh)
System.arraycopy(h.queue,1,data,0,data.length); A-5%_M3\G
} 3?<vnpN=5d
,s<d"]<
private static class MaxHeap{ Yi,um-%
X13bi}O6#
void init(int[] data){ ]z$<6+G
this.queue=new int[data.length+1]; +d.Bf
for(int i=0;i queue[++size]=data; r4'Pf|`u
fixUp(size); IrK )N
} ENr&k(>0HQ
} NIGFu{S
3x$#L!VuU
private int size=0; dv:&N
jk?(W2c#{
private int[] queue; "^7Uk#! 7
qz):YHxT]n
public int get() { b ;b1V
return queue[1]; /_HL&|N_5
} pgarGaeq
LPClE5
public void remove() { ('Pd GV4V
SortUtil.swap(queue,1,size--); epePx0N%x$
fixDown(1); 36z{TWF
} Sx7xb]3XI"
file://fixdown pQJZE7S
private void fixDown(int k) { W@LR!EW)
int j; \wP$"Z}j
while ((j = k << 1) <= size) { #=c%:{O{4R
if (j < size %26amp;%26amp; queue[j] j++; \qPrY.-
if (queue[k]>queue[j]) file://不用交换 \(s";@
break; 0Oq1ay^
SortUtil.swap(queue,j,k); mNzZ/*n:
k = j; e78}
} 6I<`N
} nfEk,(:
private void fixUp(int k) { xae7#d0
while (k > 1) { T/nRc_I+^B
int j = k >> 1; 6{ Eh={:b
if (queue[j]>queue[k]) 1U!CD-%(
break; mD:!"h/
SortUtil.swap(queue,j,k); '>8N'*
k = j; D[_2:8
} mv_-|N~
} [Pl$=[+
Yp$lc^)c>
} S45jY=)z
]](hwj
} od>.5{o
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SortUtil： z'o+3zq^
L!RLw4
package org.rut.util.algorithm; r0,}f\
F$v G=3
import org.rut.util.algorithm.support.BubbleSort; m"5gzH
import org.rut.util.algorithm.support.HeapSort; }0o0"J-$
import org.rut.util.algorithm.support.ImprovedMergeSort; {[eY/)6H
import org.rut.util.algorithm.support.ImprovedQuickSort; 8^~]Ym:
import org.rut.util.algorithm.support.InsertSort; GbhaibkO
import org.rut.util.algorithm.support.MergeSort; ^[6AOz+L
import org.rut.util.algorithm.support.QuickSort; )Lq FZ~B
import org.rut.util.algorithm.support.SelectionSort; yWy9IWI["
import org.rut.util.algorithm.support.ShellSort; }_S]!AWz
wrWWXOZ4
/** : s35{K
* @author treeroot /T0|<r!c
* @since 2006-2-2 5 X rn]
* @version 1.0 DuaOi1Gw
*/ 4 0eNgm^
public class SortUtil { J5-^@JYK
public final static int INSERT = 1; Mh\c+1MFs
public final static int BUBBLE = 2; O-RiDYej
public final static int SELECTION = 3; lEJTd3dMi
public final static int SHELL = 4; 3UEh%Ho
public final static int QUICK = 5; eL*Edl|#
public final static int IMPROVED_QUICK = 6; KR63W:Z\'
public final static int MERGE = 7; fjf\/%
public final static int IMPROVED_MERGE = 8; *e=e7KC6kI
public final static int HEAP = 9; 3i<*,@CY
*Zln\Sx
public static void sort(int[] data) { H"sey +-
sort(data, IMPROVED_QUICK); 6b0#z#E
} FD8Hx\oF
private static String[] name={ :7maN^
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" U-(d~]$
}; =619+[fK
8V@3T/}
private static Sort[] impl=new Sort[]{ @YRBZ6FH
new InsertSort(), Xg"=,j2
new BubbleSort(), Gh.02
new SelectionSort(), LY7'wONx
new ShellSort(), (_D#gr{S=
new QuickSort(), rTcH~s D`
new ImprovedQuickSort(), 4r %NtXAa
new MergeSort(), <D?`*#K
new ImprovedMergeSort(), uKplPze?
new HeapSort() u+N[Cgh
}; '<O& :
Q[ IaA"
public static String toString(int algorithm){ *ZRQ4i[+
return name[algorithm-1]; ~*RNJ
} h c"n?
+g*Ko@]m>
public static void sort(int[] data, int algorithm) { ey:3F%
impl[algorithm-1].sort(data); \;~>AL*
} -LF^u;s8&S
Q%6*S!~
public static interface Sort { 0YKG`W
public void sort(int[] data); Gg/K
} zKR_P{W>^
m]85F^R0
public static void swap(int[] data, int i, int j) { aX~7NslR
int temp = data; Vki3D'.7N
data = data[j]; UGIyNMY
data[j] = temp; oY &r76
} AV?*r-vWL.
} \JX8`]|&