[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; m%oGzx+
} 2#AeN6\@
int i1=l; 7`blGzP_
int i2=mid+1; }iua] 4|
for(int cur=l;cur<=r;cur++){ 9u?)vR[@e
if(i1==mid+1) }z%OnP
data[cur]=temp[i2++]; selP=Q!
else if(i2>r) +z:CZ(fb
data[cur]=temp[i1++]; b|sc'eP#?
else if(temp[i1] data[cur]=temp[i1++]; @PPR$4
else a{]g+tGH
data[cur]=temp[i2++]; l_c^ .D
} "WYA
} y@o9~?M
QFW0KD`5
} w0Fwd
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改进后的归并排序: ,8c dXt
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package org.rut.util.algorithm.support; p-5Pas
y)3~]h\a
import org.rut.util.algorithm.SortUtil; 4? m/*VV
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/** ^oQekga\l
* @author treeroot 6R;)
* @since 2006-2-2 C9<4~IM w
* @version 1.0 45x,|h[F{5
*/ SkiJpMN
public class ImprovedMergeSort implements SortUtil.Sort { 7fTxGm
1@A7h$1P
private static final int THRESHOLD = 10; -|m$YrzG
#_.g2 Y
/* koOyZ>
* (non-Javadoc) jrm0@K+<IA
* H<`^w)?
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 2X|CuL{]
*/ m_Mwg
public void sort(int[] data) { Z0e-W:&;kF
int[] temp=new int[data.length]; `nT?6gy
mergeSort(data,temp,0,data.length-1); 2BHKS-J*
} W1xf2=z`)T
EfKM*;A
private void mergeSort(int[] data, int[] temp, int l, int r) { [O=W>l
int i, j, k; "A%MVym."
int mid = (l + r) / 2; 9;=q=O/
if (l == r) Ur^YG4(
return; C/F@ ]_y
if ((mid - l) >= THRESHOLD) L)q`D2|'
mergeSort(data, temp, l, mid); Uh|TDuM
else ]{YN{
insertSort(data, l, mid - l + 1); !L4dUMo
if ((r - mid) > THRESHOLD) $"Afy)Ir
mergeSort(data, temp, mid + 1, r); fO*)LPen.z
else " Wp
insertSort(data, mid + 1, r - mid); <O;&qT*b
}dy9IH
for (i = l; i <= mid; i++) { A?e,U,
temp = data; 7egq4gN]2Y
} lZ}P{d'f.
for (j = 1; j <= r - mid; j++) { F(deu^s%{
temp[r - j + 1] = data[j + mid]; 6hZ.{8e0
} YVoao#!
int a = temp[l]; [ L
int b = temp[r]; p` $fTgm
for (i = l, j = r, k = l; k <= r; k++) { Jf2e<?`
if (a < b) { mv{<'
data[k] = temp[i++]; s~L`53A
a = temp; x@htx?
} else { J;S-+
data[k] = temp[j--]; (FuEd11R
b = temp[j]; {`a(Tl8V
} W:WQaF`2x
} cI5N"U@yN
} >wA+[81[
vruD U#
/** 5`"iq "5Cf
* @param data Qe_+r(3)k
* @param l 2zhn`m
* @param i X1Qr_o-BR
*/ ThtMRB)9
private void insertSort(int[] data, int start, int len) { 6_WmCtvF
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); Z%#^xCz;w>
} |7y6 pz
} [~COYjp
} +@e }mL\8
} 012Lwd
6;gLwOeOHY
堆排序： ]a M-p@
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package org.rut.util.algorithm.support; }"hW b(
] @ufV
import org.rut.util.algorithm.SortUtil; B;V5x/
~Po<(A}`f
/** 4h;4!I|
* @author treeroot n,CD
* @since 2006-2-2 !:3^ hb
* @version 1.0 M_Bu,<q^
*/ Y17hOKc`
public class HeapSort implements SortUtil.Sort{ 7#ofNH J
ZNi +Aw$u
/* (non-Javadoc) teAukE=}
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) SyAo, )j
*/ :<H8'4>
public void sort(int[] data) { Hte[TRbM
MaxHeap h=new MaxHeap(); z?4=h Sy
h.init(data); _B3zRO
for(int i=0;i h.remove(); TKo<~?
System.arraycopy(h.queue,1,data,0,data.length); L!,d"wuD
} X &D{5~qC
NEw$q4
private static class MaxHeap{ 4^[ /=J}
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void init(int[] data){ o,1Dqg4P3
this.queue=new int[data.length+1]; 3 <9{v
for(int i=0;i queue[++size]=data; ~g7m3
fixUp(size); <[ZI.+_Wt
} =G4u#t)
} *1$
P_&p=${
private int size=0; nM8[
*GJ:+U&m[
private int[] queue; b!^@PIX
|NJ}F@t/5
public int get() { wx*1*KZ
return queue[1]; <!F3s`7~
} JaI Kjn
aBxiK[[`
public void remove() { ]ENK8bW
SortUtil.swap(queue,1,size--); s7l23*Czl
fixDown(1); +Ofa#^5);K
} <bP#H
file://fixdown cI:-Z{M7z
private void fixDown(int k) { m*dNrG
int j; H:Y&OZ
while ((j = k << 1) <= size) { [1SMg$@<
if (j < size %26amp;%26amp; queue[j] j++; ^s-25 6iI
if (queue[k]>queue[j]) file://不用交换 JhP\u3 QE
break; h&`y$Jj
SortUtil.swap(queue,j,k); _~&9*D$ {>
k = j; DZk1ZLz
} f@d9Hqr+l;
} yQ%"U^.m
private void fixUp(int k) { nxfoWy
while (k > 1) { ~8{sA5y
int j = k >> 1; KP{3iUqvO
if (queue[j]>queue[k]) y3JMbl[S0
break; Ac`;st%l.
SortUtil.swap(queue,j,k); {$33B'wk
k = j; ^_W40/c3
} >g}G}=R~3
} 6pp$-uS
S)7/0N79A
} ix&'0IrX*
lP3h<j
} orqJ[!u)`
y' [LNp V
SortUtil： ^~1<f1(
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package org.rut.util.algorithm; S-c ^eLzQ
'SV7$,mK@
import org.rut.util.algorithm.support.BubbleSort; >;9NtoE
import org.rut.util.algorithm.support.HeapSort; IZrk1fh
import org.rut.util.algorithm.support.ImprovedMergeSort; t,<UohL|z
import org.rut.util.algorithm.support.ImprovedQuickSort; (>7>3
import org.rut.util.algorithm.support.InsertSort; >bIF>9T
import org.rut.util.algorithm.support.MergeSort; Y3rt5\!
import org.rut.util.algorithm.support.QuickSort; 9 <\`nm
import org.rut.util.algorithm.support.SelectionSort; PVYyE3`UB
import org.rut.util.algorithm.support.ShellSort; WD.U"YI8y
!%[S49s
/** ].mqxf
* @author treeroot o35fifM`
* @since 2006-2-2 6Hf,6>
* @version 1.0 ,b|-rU\
*/ zk}{ dG^M:
public class SortUtil { ;gB`YNL
public final static int INSERT = 1; yWb4Ify
public final static int BUBBLE = 2; rQr!R$t/[
public final static int SELECTION = 3; ,Eu?JH&}u
public final static int SHELL = 4; 3CZS)
public final static int QUICK = 5; 6gU{(H
public final static int IMPROVED_QUICK = 6; {/ 2E*|W~I
public final static int MERGE = 7; L0"~[zB]N
public final static int IMPROVED_MERGE = 8; (CE7j<j
public final static int HEAP = 9; K{=PQ XSU
:L:&t,X
public static void sort(int[] data) { fY W|p<Q0
sort(data, IMPROVED_QUICK); OH'ea5xq
} @~:8ye
private static String[] name={ SSA W52xC
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" C5X(U:
}; /nQ`&q
s([dGD$i
private static Sort[] impl=new Sort[]{ RE"^ )-
new InsertSort(), rRb+_]Lg
new BubbleSort(), eUBrzoCO
new SelectionSort(), ~ ?^/u8
new ShellSort(), | C+o;
new QuickSort(), caq} &A]C
new ImprovedQuickSort(), tef^ShF]
new MergeSort(), QG3&p<
new ImprovedMergeSort(), !mnUdR|>(
new HeapSort() D1T@R)j
}; #b)e4vwCq
3yO=S0`
public static String toString(int algorithm){ KoBW}x9Jp
return name[algorithm-1]; DuF"*R~et
} m_7 nz!h
dh -,E
public static void sort(int[] data, int algorithm) { d)ahF[82
impl[algorithm-1].sort(data); m%r/O&g
} #wR;|pN
eJ@~o{,?>
public static interface Sort { GbZ;#^S
public void sort(int[] data); K=\O5#F?3
} jNyoN1M
"484n/D
public static void swap(int[] data, int i, int j) { [V}, tO|
int temp = data; iK;opA"
data = data[j]; \RG!@$i
data[j] = temp; 9A$m$
} cgT
} NXk!qGV2