[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; t@#5 G* _Q
} (i(E~^O
int i1=l; n7~3~i`D;
int i2=mid+1; t>%b[(a
for(int cur=l;cur<=r;cur++){ IFr"IOr'l
if(i1==mid+1) mT@Gf>}/A
data[cur]=temp[i2++]; r90tXx
else if(i2>r) `EMGrw_
data[cur]=temp[i1++]; \fC;b"j
else if(temp[i1] data[cur]=temp[i1++]; bG"FN/vg
else r|ZB3L|7
data[cur]=temp[i2++]; $$0< &
} DC> R
} RJ0,7E<B
Yz[Rl ^
} _8K8Ai-~.>
JBw2#ry
改进后的归并排序: uA =%EEZ
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package org.rut.util.algorithm.support; _nzq(m1@
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import org.rut.util.algorithm.SortUtil; [cEGkz
9'~qA(=.?
/** 8/)q$zs
* @author treeroot !F~1+V>zP
* @since 2006-2-2 bxxLAWQ(
* @version 1.0 \6APU7S
*/ B[YyA
public class ImprovedMergeSort implements SortUtil.Sort { FdnLxw
I+kL;YdS
private static final int THRESHOLD = 10; 3l`"(5
cy mC?8<
/* .Xf_U.h$*@
* (non-Javadoc) "8zMe L
* Si~wig2
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) BH^*K/^
*/ #k>n5cR@0
public void sort(int[] data) { rmvrv.$3
int[] temp=new int[data.length]; ' ZTRl+
mergeSort(data,temp,0,data.length-1); : Gi8Jo
} lQ ki58.
6K8v:yYPa
private void mergeSort(int[] data, int[] temp, int l, int r) { 6?US<<MQ
int i, j, k; Fq+Cr?-
int mid = (l + r) / 2; xA:;wV
if (l == r) |p+FIr+
return; rttKj{7E
if ((mid - l) >= THRESHOLD) [-Y~g%M
mergeSort(data, temp, l, mid); ,mCf{V]#
else _O87[F1
insertSort(data, l, mid - l + 1); `hG`}G|^
if ((r - mid) > THRESHOLD) rs>,p)
mergeSort(data, temp, mid + 1, r); T$r/XAs
else BDPE.8s
insertSort(data, mid + 1, r - mid); pcscNUp
r/NaoIrJV
for (i = l; i <= mid; i++) { *1b0IQ$g
temp = data; ;XZN0A2
} B$JPE7h@[P
for (j = 1; j <= r - mid; j++) { 9dszn^]T
temp[r - j + 1] = data[j + mid]; mqJD+ K
} Dqwd=$2%
int a = temp[l]; '#j6ZC/?
int b = temp[r]; KdHkX+-R
for (i = l, j = r, k = l; k <= r; k++) { Bw`?zd\*
if (a < b) { lc fAb@}2
data[k] = temp[i++]; (?XIhpd
a = temp; !7#*Wdt+P
} else { ]CS N7Q+l
data[k] = temp[j--]; =w_T{V
b = temp[j]; dXY}B=C
} P*?2+.
} leizjL\P
} y<`:I|y
$ <[r3
/** ;*Y+.?>a
* @param data t*BCpC}
* @param l *)\y52z
* @param i 5$Kv%U
*/ .|L9}<
private void insertSort(int[] data, int start, int len) { 60>g{1]
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); #vy[v22
} ^5 "yY2}-
} ;Cx`RF w
} ~^Ga?Q_
} >c:nr&yP
HH(2
堆排序： &V&beq4)p
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package org.rut.util.algorithm.support; )Rk(gd
~k 6V?z}
import org.rut.util.algorithm.SortUtil; Ug gg!zA
/-@F|,O)$n
/** V~o'L#a
* @author treeroot #gf0*:p
* @since 2006-2-2 oM#+Z qP
* @version 1.0 =-P<v2|e
*/ ~$ ?85
public class HeapSort implements SortUtil.Sort{ <Z~Nz>'r
#>5T,[{?j
/* (non-Javadoc) 4_CXs.v1
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 6+>X`k%D
*/ |P9)*~\5
public void sort(int[] data) { @frV:%
MaxHeap h=new MaxHeap(); Opy{i#>
h.init(data); 5PpS/I:on
for(int i=0;i h.remove(); W Kd:O)J
System.arraycopy(h.queue,1,data,0,data.length); jM{5nRQ
} 4|eI_u{_
mSFA i
private static class MaxHeap{ -=1>t3~\
cUi6 On1C
void init(int[] data){ 11fV|b%
this.queue=new int[data.length+1]; h;cw=G
for(int i=0;i queue[++size]=data; KUq(&H7
fixUp(size); =7~;*Ts
} #.}&6ZP
} XK0lv8(
[Q8vS;.
private int size=0; <1~_nt~(*
[*ug:PG
private int[] queue; K7qR
6k37RpgH
public int get() { Y|-&=
return queue[1]; {ueDwnZ
} rXGaav9
YZ->ep}
public void remove() { _t X1z^
SortUtil.swap(queue,1,size--); #N97
fixDown(1); v)zxQuH]^
} \/Zo*/
file://fixdown &y3;`A7,
private void fixDown(int k) { q?0&0
int j; 1yc$b+TH
while ((j = k << 1) <= size) { [A;0IjKam
if (j < size %26amp;%26amp; queue[j] j++; R&/"?&pfa
if (queue[k]>queue[j]) file://不用交换 =| r% lx
break; q{q;X{
SortUtil.swap(queue,j,k); h)r=+Q\'(S
k = j; QT"o"B
} b^P\Kky
} 1l}fX}5%I;
private void fixUp(int k) { VW] ,R1q
while (k > 1) { Y1DbBDk
int j = k >> 1; B|AIl+y
if (queue[j]>queue[k]) -BrJ5]T>*
break; N;cSR\Ng
SortUtil.swap(queue,j,k); 9J}^{AA
k = j; E,A9+OKxJ
} urD{'FQf
} 8tT/w5
_tnoq;X[
} /EVXkf0
|[/XG2S
} |5BvVqn
kL -f@CD
SortUtil： TPi{c_ ]
j'SGZnsy*
package org.rut.util.algorithm; 4"+v:t)z6{
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import org.rut.util.algorithm.support.BubbleSort; `P*PCiZos
import org.rut.util.algorithm.support.HeapSort; NQd0$q
import org.rut.util.algorithm.support.ImprovedMergeSort; \Dx)P[Ur
import org.rut.util.algorithm.support.ImprovedQuickSort; 17ynFHMd,
import org.rut.util.algorithm.support.InsertSort; J>0RN/38o
import org.rut.util.algorithm.support.MergeSort; OK:YnSk"
import org.rut.util.algorithm.support.QuickSort; t1o_x}z4.
import org.rut.util.algorithm.support.SelectionSort; 3`njQvI\
import org.rut.util.algorithm.support.ShellSort; VQ2B|v
o~'UWU'#
/** ~2XiKY;W?
* @author treeroot h7}P5z0F
* @since 2006-2-2 X/S%0AwZ
* @version 1.0 mGUG
*/ n=h!V$X
public class SortUtil { ^QTkre
public final static int INSERT = 1; zgSv -h+f
public final static int BUBBLE = 2; U;U19[]
public final static int SELECTION = 3; 7I:<i$)V
public final static int SHELL = 4; ","to
public final static int QUICK = 5; B}d)e_uLj
public final static int IMPROVED_QUICK = 6; XiyL563gh
public final static int MERGE = 7; ,LDdL
public final static int IMPROVED_MERGE = 8; #4^D'r>pJ
public final static int HEAP = 9; ~H626vT37
)dRBI)P
public static void sort(int[] data) { <TEDs4 C
sort(data, IMPROVED_QUICK); 8H{9
} 8-Z|$F"
private static String[] name={ >td\PW~X
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" \'P79=AU
}; u< 5{H='6
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private static Sort[] impl=new Sort[]{ ue!wo-|#G
new InsertSort(), Q~)A fa{
new BubbleSort(), 'u%SI]*;>
new SelectionSort(), '&iAPc4=
new ShellSort(), $&0\BvS
new QuickSort(), Z+S1e~~
new ImprovedQuickSort(), R lmeZy4.
new MergeSort(), U0dhr;l
new ImprovedMergeSort(), @9h6D<?
new HeapSort() [F^j(qTR
}; lUM-~
J<ZG&m362p
public static String toString(int algorithm){ /h K/t;
return name[algorithm-1]; iaQ3mk#
} 2NWQiSz
R-BN}ZS
public static void sort(int[] data, int algorithm) { m)xz_Plc
impl[algorithm-1].sort(data); !;&{Q^}
} MZ<BCRB
(L7%V !
public static interface Sort { M}!E :bv'
public void sort(int[] data); 6w$pL(
} 0d #jiG
<Lfo5:.
public static void swap(int[] data, int i, int j) { qfB!)Y
int temp = data; U$6(@&P!
data = data[j]; >Te h ?P
data[j] = temp; [kPF Jf
} kBJx`tjtp
} |&0Cuwt