[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; IfH/~EtX
} W2<'b05
int i1=l; [Vbdsu9
int i2=mid+1; ;-JF1p7;
for(int cur=l;cur<=r;cur++){ b0}dy\dnQ
if(i1==mid+1) m2m ;|rr
data[cur]=temp[i2++]; ,tXI*R
else if(i2>r) $\m:}\%p
data[cur]=temp[i1++]; h8WM4 PK
else if(temp[i1] data[cur]=temp[i1++]; LTf)`SN %'
else <mJ8~
data[cur]=temp[i2++]; 0=+feB1T
} b|V<Kp
} &am<_Tn*3
fx>QP?Z
} U^}7DJ
?* +>T@MH
改进后的归并排序: I`+,I`~u
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package org.rut.util.algorithm.support; #y&5pP:@
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import org.rut.util.algorithm.SortUtil; otaRA
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/** w.rcYywI
* @author treeroot B|o@|zF
* @since 2006-2-2 J<0sT=/2$
* @version 1.0 papMC"<g$
*/ 7Tp+]"bL
public class ImprovedMergeSort implements SortUtil.Sort { fNda&
C\{ KB@C\*
private static final int THRESHOLD = 10; |A68+(3u
3K||(
/* 1Y"9<ry
* (non-Javadoc) %V1jM
* N~b0b;e
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) i\uj>;B
*/ IT#Li
public void sort(int[] data) { |"}7)[BW}
int[] temp=new int[data.length]; 8@doKOA~T
mergeSort(data,temp,0,data.length-1); I@qGDKz;
} M]%dFQ
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private void mergeSort(int[] data, int[] temp, int l, int r) { ,n%b~.$:v5
int i, j, k; ,dd1/zm
int mid = (l + r) / 2; ml2/}}
if (l == r) bp" @p:
return; 'PrBa[%
if ((mid - l) >= THRESHOLD) GfSD%"
mergeSort(data, temp, l, mid); h}tC+_"D
else {ZdF6~+H(!
insertSort(data, l, mid - l + 1); 7'At_oG
if ((r - mid) > THRESHOLD) EajJv>X7
mergeSort(data, temp, mid + 1, r); d %FLk=]
else 0i5S=L`j
insertSort(data, mid + 1, r - mid); (:]+IjnE
%*K zP{
for (i = l; i <= mid; i++) { /:!l&1l:p
temp = data; K8&) kfyI
} 'cu14m_
for (j = 1; j <= r - mid; j++) { oP T)vN?
temp[r - j + 1] = data[j + mid]; ?x 0gI
} : &nF>
int a = temp[l]; 48S NI
int b = temp[r]; yIr0D6L
for (i = l, j = r, k = l; k <= r; k++) { /]0SF_dZ
if (a < b) { 2&pE
data[k] = temp[i++]; }l}_'FmQ
a = temp; FbMtor
} else { y5KeUMcu
data[k] = temp[j--]; LRaO}-<b
b = temp[j]; {2Ew^Li
} : Wtpg
} s1sn,?
} 7}MnvWP
`t9k!y!GV
/** g[O
* @param data 7K&Uu3m
* @param l 4o";p}[b
* @param i /oJ &\pI
*/ 86cnEj=
private void insertSort(int[] data, int start, int len) { m8 _yorz
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); M/lC&F(
} @+~>utr
} y$di_)&g
} Wt@hST
} v:Gy>&
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堆排序： CAx eJ`Q
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package org.rut.util.algorithm.support; eU`O=uE
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import org.rut.util.algorithm.SortUtil; X!ldL|Ua%
)}"`$6:k`
/** \b6{u6?+
* @author treeroot ~z]VDEJ{q
* @since 2006-2-2 KJS-{ed
* @version 1.0 gMZ+kP`
*/ _NwHT`O[
public class HeapSort implements SortUtil.Sort{ br TP}A
#*w)rGkU2
/* (non-Javadoc) Ahbh,U
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) {98e_z w
*/ O0 Uh
public void sort(int[] data) { k' Fu&r
MaxHeap h=new MaxHeap(); A)j!Wgs^z
h.init(data); u>vvW|OB[
for(int i=0;i h.remove(); j+3rS
System.arraycopy(h.queue,1,data,0,data.length); ?WqaT)l~
} :x5O1Zn/t
]9_}S
private static class MaxHeap{ dHg[r|xC
5D<ZtsXE
void init(int[] data){ ?EHheZ{
this.queue=new int[data.length+1]; SYf1dbc..u
for(int i=0;i queue[++size]=data; 3` oOoKX
fixUp(size); >!lpI5'Z&
} E`@Z9k1 `
} 3OKs?i3A
T>b"Gj/
private int size=0; f}*:wj
SsZSR.tD
private int[] queue; $%'3w~h`
KZ#\ >
public int get() { `jr?I {m;
return queue[1]; RjgJIVm(
} S3WUccv
o[WDPIG
public void remove() { ZvT>A#R;l~
SortUtil.swap(queue,1,size--); 0b n%L~KU
fixDown(1); )cP)HbOd=
} Y.tT#J^=
file://fixdown ZMiOKVl
private void fixDown(int k) { q~W:W}z
int j; h9}*_qc&kV
while ((j = k << 1) <= size) { 79d(UG'O
if (j < size %26amp;%26amp; queue[j] j++; nfGI4ZE
if (queue[k]>queue[j]) file://不用交换 q TN)2G
break; gVR]z9
SortUtil.swap(queue,j,k); 9^8OIv?m8
k = j; <;~u@^>
} {i8zM6eC
} Xxd]j]
private void fixUp(int k) { |KS,k|).
while (k > 1) { GPL%8 YY
int j = k >> 1; c>>.>^5
if (queue[j]>queue[k]) r;[=y<Yf
break; 6'@{ * u
SortUtil.swap(queue,j,k); ybJwFZ80
k = j; {]dtA&8(
} 8=joVbs
} gOW8!\V
CAs:>s '8
} iQ2j ejd3(
Yb/*2iWX
} 9`Fw}yAt
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SortUtil： ?8GS*I
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package org.rut.util.algorithm; Iapz,nuE
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import org.rut.util.algorithm.support.BubbleSort; &g^*ep~|#
import org.rut.util.algorithm.support.HeapSort; <.gDg?'3
import org.rut.util.algorithm.support.ImprovedMergeSort; GfEWms8z
import org.rut.util.algorithm.support.ImprovedQuickSort; m}=E$zPbO
import org.rut.util.algorithm.support.InsertSort; "UNFB3
import org.rut.util.algorithm.support.MergeSort; Px \cT
import org.rut.util.algorithm.support.QuickSort; .1{{E8Fj
import org.rut.util.algorithm.support.SelectionSort; $$&.}}.,
import org.rut.util.algorithm.support.ShellSort; }b&S3?ONt
.#|?-5q/iN
/** Q!U}
* @author treeroot PS[ C!s&KE
* @since 2006-2-2 }58MDpOF1
* @version 1.0 \I523$a
*/ !%('8-x%
public class SortUtil { zB`woI28
public final static int INSERT = 1; ?&~q^t?u
public final static int BUBBLE = 2; V8TdtGB.|h
public final static int SELECTION = 3; Tsa]SN14
public final static int SHELL = 4; ]6)u$4X6$
public final static int QUICK = 5; %%uE^nX>
public final static int IMPROVED_QUICK = 6; 1d]F$>
public final static int MERGE = 7; NzP71t+
public final static int IMPROVED_MERGE = 8; tS]
public final static int HEAP = 9; y5m2u8+
VLkAsM5}%
public static void sort(int[] data) { [{BY$"b#:
sort(data, IMPROVED_QUICK); bD:0k.`
} L1/`/
private static String[] name={ Cg]),S
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" Im/tU6ybV
}; '=fk;AiQ
%60 OS3
private static Sort[] impl=new Sort[]{ 0C/ZcfFU~
new InsertSort(), =huV(THU
new BubbleSort(), .)!QsBU
new SelectionSort(), ;'uQBx}
new ShellSort(), %sr- xE
new QuickSort(), P%(9`A
new ImprovedQuickSort(), AO|9H`6U6F
new MergeSort(), o5F:U4sG
new ImprovedMergeSort(), `**{a/3
new HeapSort() R54[U
}; X(nyTR8
K=v:qY4Z
public static String toString(int algorithm){ ^Q$OzsEk
return name[algorithm-1]; #T^2=7 w
} y-1e(:GF
AT~,
public static void sort(int[] data, int algorithm) { E3wL n/<
impl[algorithm-1].sort(data); M }d:B)cz
} M[YFyM(
\BXzmok
public static interface Sort { +C{-s
public void sort(int[] data); eNAxVF0
} ?s^3o{!<W
TD}<U8I8_
public static void swap(int[] data, int i, int j) { 'YNdrvz
int temp = data; 0^-1d2Z~
data = data[j]; WxGD*%
data[j] = temp; &HM-UC|
} qM(}|fMbN
} k*hl"oL"X