[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; R#T-o,m
} >qeDb0
int i1=l; $}9jv3>)
int i2=mid+1; |Y7SP]/`gB
for(int cur=l;cur<=r;cur++){ +:S`]
if(i1==mid+1) r48|C{je-
data[cur]=temp[i2++]; f3K-X1`]'U
else if(i2>r) 0<,{poMM
data[cur]=temp[i1++]; mTZ/C#ir(
else if(temp[i1] data[cur]=temp[i1++]; 6TP /0o)
else 1djZ5`+
data[cur]=temp[i2++]; 6{h\CU}"
} GG%b"d-
} )bUnk+_
}]x \ `}o
} nLN0zfhE#
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改进后的归并排序: [LYO'-g^F#
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package org.rut.util.algorithm.support; w!F>fcm
O_FB^BB
import org.rut.util.algorithm.SortUtil; Nk'<*;e
=U]9>
/** OX_y"]utU
* @author treeroot qM\ 2f<)
* @since 2006-2-2 ^^a6 (b
* @version 1.0 Hjm> I'9
*/ c]6b|mHT
public class ImprovedMergeSort implements SortUtil.Sort { p<5]QV7st
Q((&Q?Vi
private static final int THRESHOLD = 10; sxNf"C=-.
[D"6&
/* `16'qc
* (non-Javadoc) 1j?P$%p
* wC1pfXa
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) _*mn4n=
*/ m#_BF#
public void sort(int[] data) { %e iV^>
int[] temp=new int[data.length]; @{/)k%U
mergeSort(data,temp,0,data.length-1); V]H(;+^P
} Ac:`xk<
]s\r3I]
private void mergeSort(int[] data, int[] temp, int l, int r) { z !K2UTX
int i, j, k; 7HPwlS
int mid = (l + r) / 2; Y{} ub]i
if (l == r) 20c5U%
return; @:N8V[*u
if ((mid - l) >= THRESHOLD) PCT&d)}
mergeSort(data, temp, l, mid); zL"e.
else <.h7xZ
insertSort(data, l, mid - l + 1); WVP?Ie8
if ((r - mid) > THRESHOLD) ~74Sq'j9Wt
mergeSort(data, temp, mid + 1, r); 25X|N=}
else .p[uIRd`
insertSort(data, mid + 1, r - mid); Kb;*"@LX
WtOjPW
for (i = l; i <= mid; i++) { o,7|=.-b
temp = data; T?8BAxC?K
} _XZ Gj:V
for (j = 1; j <= r - mid; j++) { f"Sp.'@
temp[r - j + 1] = data[j + mid]; 0#V"
} Y@FYo>0O
int a = temp[l]; l2F#^=tp
int b = temp[r]; ,rB(WKU
for (i = l, j = r, k = l; k <= r; k++) { /YJo"\7
if (a < b) { OyO<A3
data[k] = temp[i++]; /~,*DH$)
a = temp; Ao K9=F}
} else { $kUB%\`
data[k] = temp[j--]; [jgVN w""D
b = temp[j]; hK?GIbRZ
} ChiIQWFE
} <B6md i'R
} pwo$qs(p
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/** d"|_NG`vr
* @param data V(ELrjB0
* @param l xlv(PVdn
* @param i oCT,v0+4O
*/ e$9a9twl
private void insertSort(int[] data, int start, int len) { Wl| i$L)7
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); w%L4O;E]*{
} c.>f,vtcn
} >Na.C(DZ
} K|%Am4
} ^G!cv
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堆排序： Uu7]`Ul
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package org.rut.util.algorithm.support; utck{]P
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import org.rut.util.algorithm.SortUtil; ^q-%#
bF _]j/
/** F_079~bJ
* @author treeroot T@1;Nbz]
* @since 2006-2-2 }83 8F&
* @version 1.0 .$\-{)
*/ 2J=`"6c
public class HeapSort implements SortUtil.Sort{ h,\{s_b
-r*|N.5c
/* (non-Javadoc) [8'?G5/n
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) -mO#HZIq
*/ q^xG%YdPz+
public void sort(int[] data) { ^\PRzY
MaxHeap h=new MaxHeap(); f0P,j~]
h.init(data); JSUD$|RiJ
for(int i=0;i h.remove(); ?s,oH
System.arraycopy(h.queue,1,data,0,data.length); @|A!?}
} Sh#N5kgD
V7WL Gy.,
private static class MaxHeap{ M6wH$!zRa
4q.;\n
void init(int[] data){ _|e&zr
this.queue=new int[data.length+1]; +2MF#{ tS
for(int i=0;i queue[++size]=data; Bw;isMx7
fixUp(size); l~$)>?ZD
} ;bwBd:Y
} !SuflGx,q
h;q&B9
private int size=0; +pYgh8w@
w10~IP
private int[] queue; &0kr[Ik.
7c\W&ZEmb-
public int get() { M"*NV(".g
return queue[1]; d'(n/9K
} GP+=b:C{E
b'pwRKpx
public void remove() { ;?u cC@
SortUtil.swap(queue,1,size--); pj_W^,*/
fixDown(1); @PM<pEve
} c&PsT4Wh
file://fixdown )q{qWobS0
private void fixDown(int k) { 5QqU.9M
int j; ;?q(8^A
while ((j = k << 1) <= size) { u^xnOVE
if (j < size %26amp;%26amp; queue[j] j++; UG\2wH_
if (queue[k]>queue[j]) file://不用交换 k2eKs*WLC
break; DOu^
SortUtil.swap(queue,j,k); igL5nE=n
k = j; oI#TjF
} +788aK,{#
} =w`Mc\o"
private void fixUp(int k) { 0V6, &rTF
while (k > 1) { q25p3
int j = k >> 1; 2|7:`e~h
if (queue[j]>queue[k]) {ccc[G?>.Q
break; RF*>U a
SortUtil.swap(queue,j,k); Mq~E'g4#
k = j; ZC2aIJ
} z?13~e[D
} dWzf C@]
@~vg=(ic(
} R:n|1]*f3X
bbq`gEV
} OybmyGHY
&'`C#-e@
SortUtil： 2MB>NM<xO
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package org.rut.util.algorithm; Q"s6HZ"YI
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import org.rut.util.algorithm.support.BubbleSort; p p0356
import org.rut.util.algorithm.support.HeapSort; I]n X6=j5
import org.rut.util.algorithm.support.ImprovedMergeSort; a;dWM(;Kw
import org.rut.util.algorithm.support.ImprovedQuickSort; `'|6b5`2j
import org.rut.util.algorithm.support.InsertSort; <Z t]V`-
import org.rut.util.algorithm.support.MergeSort; . AA# G
import org.rut.util.algorithm.support.QuickSort; < e3] pM
import org.rut.util.algorithm.support.SelectionSort; L[PqEN\i
import org.rut.util.algorithm.support.ShellSort; ]2L11"erP
BHp>(7,
/** q5Zu'-Cx@
* @author treeroot 6Z1O:Bou
* @since 2006-2-2 T$mT;k
* @version 1.0 N@_y<7#C
*/ &LI q?
public class SortUtil { *CGHp8
public final static int INSERT = 1; xj33g6S
public final static int BUBBLE = 2; uxdB}H,
public final static int SELECTION = 3; R6X2d\l#
public final static int SHELL = 4; 1/\Xngd
public final static int QUICK = 5; `hY%HzV=
public final static int IMPROVED_QUICK = 6; o[wiQ9Tl
public final static int MERGE = 7; \RDqW+,
public final static int IMPROVED_MERGE = 8; el<Gd.p.d
public final static int HEAP = 9; /T qbl^[
}^H(EHE
public static void sort(int[] data) { 5Bq;Vb
sort(data, IMPROVED_QUICK); %@(+`CCA
} \1-lda
private static String[] name={ [Y@}{[q5
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" m!zvt
}; Jv 5l
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private static Sort[] impl=new Sort[]{ f-^*p
new InsertSort(), ?0u"No52m
new BubbleSort(), 5O~xj:
new SelectionSort(), I;AS.y
new ShellSort(), $Vp&7OC]
new QuickSort(), ~BTm6*'h
new ImprovedQuickSort(), sAO/yG
new MergeSort(), 9FC_B+7
new ImprovedMergeSort(), ,h%n5R$:
new HeapSort() +?t& 7={~
}; zxs)o}8icO
`r&Ui%fk;0
public static String toString(int algorithm){ ?r]0%W^
return name[algorithm-1]; )w}'kih
} S&=@Hj-
qDg`4yX.}
public static void sort(int[] data, int algorithm) { T+0z.E!~I
impl[algorithm-1].sort(data); I_Z?'M
} i`6utOq
S\ZCZ0
public static interface Sort { RKMF?:
public void sort(int[] data); ve a$G~[%6
} ,]qc#KDq-1
,F!-17_vt
public static void swap(int[] data, int i, int j) { )jwovS?V
int temp = data; f7 ew<c\
data = data[j]; 'M?pg$ta_V
data[j] = temp; ]ml'd
} }j6|+
} MC-Z6l2