[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; b|Ed@C
} xJzO?a'
int i1=l; . =A|
int i2=mid+1; .Wyx#9
for(int cur=l;cur<=r;cur++){ wCr+/"t
if(i1==mid+1) ~i@Z4tj7
data[cur]=temp[i2++]; (P:.@P~
else if(i2>r) Jxb+NPUB
data[cur]=temp[i1++]; 'UCF2L
else if(temp[i1] data[cur]=temp[i1++]; )vur$RX
else wmv/?g
data[cur]=temp[i2++]; WAw} ?&k
} .=b)Ae c
} [\i1I`7pE
9%Ftln6
} bDcWPwe
bO{wQ1)Z_
改进后的归并排序: W{'tS{
! +Hc(i
package org.rut.util.algorithm.support; c;7ekj
9%uJ:c?
import org.rut.util.algorithm.SortUtil; I'uRXvEr7
DCtrTX
/** 5E|/n(
* @author treeroot T;I>5aQ:q4
* @since 2006-2-2 +Y^/0=6h
* @version 1.0 eYjr/`>O
*/ G5x%:,n
public class ImprovedMergeSort implements SortUtil.Sort { Q,f5r%A.
^$O,Gy)V
private static final int THRESHOLD = 10; [[:wSAO>6'
b_0Xi
/* I%G6V a@
* (non-Javadoc) &@D,|kHk
* [^-DFq5@
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Y_&)>;
*/ G&*2h2,]
public void sort(int[] data) { )![?JXf
int[] temp=new int[data.length]; ('p~h-9Vi
mergeSort(data,temp,0,data.length-1); m]U`7!
} ny~~xQ"
aTY\mKk
private void mergeSort(int[] data, int[] temp, int l, int r) { ygp NMq#?X
int i, j, k; RV:%^=V-
int mid = (l + r) / 2; ]^^mJt.Iv
if (l == r) >H?{=H+/#
return; rOy-6og
if ((mid - l) >= THRESHOLD) X8b= z9
mergeSort(data, temp, l, mid); -d 6B;I<'
else co%ttH\ n
insertSort(data, l, mid - l + 1); o;@T6-VH
if ((r - mid) > THRESHOLD) f~? MNJ2
mergeSort(data, temp, mid + 1, r); 4h~o>(Sq
else O9W|&LAL
insertSort(data, mid + 1, r - mid); m;nT ?kv
`H6kC$^Ofx
for (i = l; i <= mid; i++) { F&lvofy23
temp = data; RI_3X5.KQ
} WY%'ps_]<
for (j = 1; j <= r - mid; j++) { 'e>0*hF[
temp[r - j + 1] = data[j + mid]; ]T! >]
} }A`4ae=
int a = temp[l]; M1T)e9k=x
int b = temp[r]; 3 tp'}v
for (i = l, j = r, k = l; k <= r; k++) { B@Q Ate7
if (a < b) { 4`7:gfrO,
data[k] = temp[i++]; h~ =UFE%'
a = temp; ]MP6VT
} else { W]rK*Dc
data[k] = temp[j--]; !1}A\S
b = temp[j]; q~=]_PMP
} _ZfJfd~
} rBZ0(XSZQ
} i7w>Nvj]
sc^TElic
/** n_51-^*z
* @param data 58Fan*fO
* @param l &pD6Qq{
* @param i ]?`t spm<t
*/ =q(;g]e
private void insertSort(int[] data, int start, int len) { $>;U^-#3
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); PI#xRKt
} _$?SKid|o
} (W|Eg
} @4D$Xl
} t .&YD x
RS~jHwIh
堆排序： ^U.8grA
!;^sIoRPV
package org.rut.util.algorithm.support; I7hE(2!$
n%]1p36
import org.rut.util.algorithm.SortUtil; #xS8
Bp`?inKBOd
/** TC4W7}}
* @author treeroot Ii/#cdgF
* @since 2006-2-2 ,tZWPF-
* @version 1.0 Uzb~L_\Rmt
*/ MGd 7Ont
public class HeapSort implements SortUtil.Sort{ &C+pen)Z
nxP>IfSA
/* (non-Javadoc) 9air"4
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) hSq3LoHV
*/ mpBSd+;Z
public void sort(int[] data) { `2y2Bk
MaxHeap h=new MaxHeap(); brGUK PB
h.init(data); ([='LyH];z
for(int i=0;i h.remove(); R;gN^Yjk:
System.arraycopy(h.queue,1,data,0,data.length); PG8|w[V1"
} I_IDrS)O
9GuG"^08
private static class MaxHeap{ D}wM$B@S
Lc!% 3,#.
void init(int[] data){ |>(;gr/5(
this.queue=new int[data.length+1]; jX79Nm|
for(int i=0;i queue[++size]=data; `k/hC
fixUp(size); YT6<1-E#
} %SL'X`j
} `Pv[A
R g7 O
private int size=0; s('<ms
.AOf-a
private int[] queue; ~r6qnC2
Tp&03
public int get() { E4aCL#}D
return queue[1]; oX@0+*"
} #`rvL6W q}
EM+#h'%-
public void remove() { L<encPJt
SortUtil.swap(queue,1,size--); cTpAU9|(
fixDown(1); =l TV2C<
} qr[H0f]
file://fixdown xJ)hGPrAl
private void fixDown(int k) { y|1,h}H^n
int j; (-tF=wR,W
while ((j = k << 1) <= size) { \e64Us>"x
if (j < size %26amp;%26amp; queue[j] j++; 00 Qn1
if (queue[k]>queue[j]) file://不用交换 p=vu<xXtD
break; y{ReQn3>y
SortUtil.swap(queue,j,k); @sRUl ,M;Z
k = j; u;m[,
} IPK.
} x'OE},>i
private void fixUp(int k) { s_A<bW566F
while (k > 1) { /(Se:jH$>
int j = k >> 1; %]Gm
if (queue[j]>queue[k]) wiXdb[[#
break; 8_6\>hW&
SortUtil.swap(queue,j,k); pZx'%-\-T
k = j; $bRakF1'S
} )'BuRN8
} w~A{]s{4
fJ_d,4
} I6d4<#Q@L
48JD >=@7
} #IjG[a-
GE]cH6E
SortUtil： fX=o,=-f
ZtPq*/'
package org.rut.util.algorithm; yES+0D5<
z;GR(;w/
import org.rut.util.algorithm.support.BubbleSort; C=&7V
import org.rut.util.algorithm.support.HeapSort; )# le|Rf
import org.rut.util.algorithm.support.ImprovedMergeSort; pZ?7'+u$L
import org.rut.util.algorithm.support.ImprovedQuickSort; ~wmc5L/!?
import org.rut.util.algorithm.support.InsertSort; :uE:mY%R
import org.rut.util.algorithm.support.MergeSort; #'N"<o[
import org.rut.util.algorithm.support.QuickSort; RHc63b\
import org.rut.util.algorithm.support.SelectionSort; w,fA-*bZ 0
import org.rut.util.algorithm.support.ShellSort; 5|>FM&
jdsNZV
/** AV\6K;~
* @author treeroot ^sR]w]cz.
* @since 2006-2-2 Nf(Np1?;c
* @version 1.0 !iBe/yb
*/ Sq"O<FmI
public class SortUtil { *5'U3py
public final static int INSERT = 1; [EUp4%Z #
public final static int BUBBLE = 2; BFP (2j
public final static int SELECTION = 3; f$vWi&(
public final static int SHELL = 4; 9~8 A>
public final static int QUICK = 5; f>\guuG
public final static int IMPROVED_QUICK = 6; :=qblc
public final static int MERGE = 7; R#OVJ(#
public final static int IMPROVED_MERGE = 8; :r%Hsur(
public final static int HEAP = 9; <smi<syx
41f4zisZ
public static void sort(int[] data) { `NqX{26GV+
sort(data, IMPROVED_QUICK); dHp(U :)
} o";5@NH
private static String[] name={ UruD&=AMK
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" es}j6A1
}; EHk(\1!V
cNX,%
private static Sort[] impl=new Sort[]{ %c[Q_
new InsertSort(), 7#K%Bo2pG
new BubbleSort(), wLyQ <[$
new SelectionSort(), K?[*9Q'\
new ShellSort(), Ml`tDt|;
new QuickSort(), R[Y]B$XO
new ImprovedQuickSort(), :<$B o
new MergeSort(), y{CyjYpz^
new ImprovedMergeSort(), |_q:0qo
new HeapSort() : tKa1vL
}; h/u>F$}c
NjT#p8d X
public static String toString(int algorithm){ 6(1xU\x
return name[algorithm-1]; thWQU"z4
} Hgs=qH
z8W@N8IqC
public static void sort(int[] data, int algorithm) { KUs\7Sb
impl[algorithm-1].sort(data); 3KFw0(S/
} QJ{to%
m/W0vPM1
public static interface Sort { |3\$\qa
public void sort(int[] data); 7O6VnKl
} Z|&Y1k-h
sU>!sxW
public static void swap(int[] data, int i, int j) { )Ih'0>=
int temp = data; LwDm(gG
data = data[j]; &w@~@]
data[j] = temp; fAMJFHW
} e_3KNQ`kA
} L@> +iZSO