[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; j3&*wU_
} m5{SPa,y
int i1=l; 64fG,b
int i2=mid+1; O_^h 7
for(int cur=l;cur<=r;cur++){ #KW:OFT
if(i1==mid+1) ?~IZ{!
data[cur]=temp[i2++]; '7s!NF2
else if(i2>r) UI;{3Bn
data[cur]=temp[i1++]; Lai"D[N
else if(temp[i1] data[cur]=temp[i1++]; Hp!F?J7sx
else P7-3Vf_L
data[cur]=temp[i2++]; IhLfuyFWu
} yk{alSF
} C<>.*wlp=
`f]O
} CI{x/ e^(
^ BKr0~4A
改进后的归并排序: 9<S-b |!@
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package org.rut.util.algorithm.support; {AUEVt
9MxGyGz$
import org.rut.util.algorithm.SortUtil; q=6Y2Q
`l#g`~L
/** DAW%?(\,
* @author treeroot K>y+3HN[6
* @since 2006-2-2 <H6Uo#ao
* @version 1.0 %R"Fx$tQ
*/ \.] U
public class ImprovedMergeSort implements SortUtil.Sort { HrGX-6`
=Frr#t!(w0
private static final int THRESHOLD = 10; X)m2{@v D
{'!~j!1'j
/* g\'sGt3O
* (non-Javadoc) 2|BE{91
* -;}Wm[
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) tO7{g
*/ v*3:8Y,
public void sort(int[] data) { #SueT"F
int[] temp=new int[data.length]; soF^G21N
mergeSort(data,temp,0,data.length-1); :%{7Q$Xv<
} =xoTH3/,>
pjFgIG2=9
private void mergeSort(int[] data, int[] temp, int l, int r) { =%LS9e^7D
int i, j, k; u2QJDLMJv
int mid = (l + r) / 2; GCHssw~P'v
if (l == r) X*KT=q^?n
return; P;Ox|
if ((mid - l) >= THRESHOLD) A\`Uu&
mergeSort(data, temp, l, mid); kel48B
else B_> Fd&
insertSort(data, l, mid - l + 1); }R^{<{KVJ
if ((r - mid) > THRESHOLD) \B)<<[ $
mergeSort(data, temp, mid + 1, r); wr`eBPu
else v|6fqG+Q\
insertSort(data, mid + 1, r - mid); y@I"Hk<T
k4v[2y`
for (i = l; i <= mid; i++) { ',f[y:v;
temp = data; U|=y&a2Rb
} #u_-TWVt
for (j = 1; j <= r - mid; j++) { h(BN6ZrzKd
temp[r - j + 1] = data[j + mid]; aC*J=_9o#
} 4y'REC
int a = temp[l]; dSbV{*B;>
int b = temp[r]; @y+Wl*:
for (i = l, j = r, k = l; k <= r; k++) { ]P.S5s'
if (a < b) { Oaui@q
data[k] = temp[i++]; y}A-o_u@cD
a = temp; T~la,>p|}
} else { c}A^0,"z>
data[k] = temp[j--]; AOpfByw
b = temp[j]; fOfp.`n
} FwyPmtBj
} <javZJ
} Y3?kj@T`i
/=%4gWtr
/** b~r ?#2K
* @param data ]^!#0(
* @param l ?pFHpz
* @param i !|D,cs
*/ 1*Z}M%
private void insertSort(int[] data, int start, int len) { >QYxX<W
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); bz1\EkLL
} =3FXU{"Qi4
} #C|iW@
} _QQO&0Z
} il:""x7^y
yt?#T#
堆排序： # aC}\
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package org.rut.util.algorithm.support; Q?~l=}2
d<y B ~Y
import org.rut.util.algorithm.SortUtil; @ ~PL|Pp_
k7j;'6
/** \eN}V
* @author treeroot ;lGjj9we>
* @since 2006-2-2 co: W!
* @version 1.0 _]B'C
*/ 'E9\V\bi
public class HeapSort implements SortUtil.Sort{ Q WOd&=:
G*ecM`Bl
/* (non-Javadoc) STO6cNi
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) T3\Q<
*/ 'C(YUlT2?P
public void sort(int[] data) { )F:hv[iv
MaxHeap h=new MaxHeap(); =h4XsV)rO
h.init(data); &",pPuq
for(int i=0;i h.remove(); OfPWqNpO
System.arraycopy(h.queue,1,data,0,data.length); F*QGzbv)
} zH.7!jeE
9T)-|fja_
private static class MaxHeap{ ?>2k>~xlQ
7Kfh:0Ihhy
void init(int[] data){ 9mr99tA
this.queue=new int[data.length+1]; .QW89e,O3
for(int i=0;i queue[++size]=data; `w2hJP
fixUp(size); `C,479~J
} KATt9ox@
} Nb-;D)W;B
1I_(!F{Ho
private int size=0; (Ori].{C.J
kA fkQy(~
private int[] queue; IG 6yt
q45Hmz
public int get() { h60*=+vdJ
return queue[1]; S_WYU&8
} |*Hw6m
U5odSR$
public void remove() { MC^H N w
SortUtil.swap(queue,1,size--); q'[5h>Pa
fixDown(1); +[ !K
} 0X.pI1jCO
file://fixdown !M6*A1g5
private void fixDown(int k) { +g%kr~w=
int j; _dj_+<Y?
while ((j = k << 1) <= size) { .cjSgK1
if (j < size %26amp;%26amp; queue[j] j++; Ng2qu!F7
if (queue[k]>queue[j]) file://不用交换 TN4gGky!
break; ,F]Y,"x:
SortUtil.swap(queue,j,k); }O-|b#Q
k = j; `J#(ffo-
} DR;rK[f
} NZ7g}+GTG
private void fixUp(int k) { m\RU|Z
while (k > 1) { s7[du_)
int j = k >> 1; GG-7YJ
if (queue[j]>queue[k]) Ru`&>E
break; >:WnCkbp
SortUtil.swap(queue,j,k); ycTX\.KV
k = j; > X<pzD3u
} z1K@AaRx
} h,"K+$
$C#G8Ck,
} vvwNJyU-
)%I2#Q"Nt-
} [LbUlNq^B@
|wZcVct~
SortUtil： Kf/1;:^
fYBmW')
package org.rut.util.algorithm; KEEHb2q
cia'h_w
import org.rut.util.algorithm.support.BubbleSort; 9Ra*bP ]1
import org.rut.util.algorithm.support.HeapSort; nep0<&"
import org.rut.util.algorithm.support.ImprovedMergeSort; YBehyx2eK
import org.rut.util.algorithm.support.ImprovedQuickSort; E<y0;l?H<
import org.rut.util.algorithm.support.InsertSort; u_shC"X:
import org.rut.util.algorithm.support.MergeSort; Gm~jC <
import org.rut.util.algorithm.support.QuickSort; ErnjIx:
import org.rut.util.algorithm.support.SelectionSort; ;EDc1:
import org.rut.util.algorithm.support.ShellSort; |uf{:U)
xM"k qRZ
/** pUi|&F K">
* @author treeroot 2dg+R)%
* @since 2006-2-2 'B>fRN
* @version 1.0 AwN7/M~'
*/ I&%{%*y
public class SortUtil { VC$,Y
public final static int INSERT = 1; ;6P#V`u
public final static int BUBBLE = 2; |*W_
public final static int SELECTION = 3; g<(3wL,"
public final static int SHELL = 4; {xJq F4
public final static int QUICK = 5; v,Eqn8/O
public final static int IMPROVED_QUICK = 6; Z\c^CN
public final static int MERGE = 7; cAnL,?_v
public final static int IMPROVED_MERGE = 8; uyZ
public final static int HEAP = 9; P@lDhzd
u_ou,RF
public static void sort(int[] data) { $=3&qg"!
sort(data, IMPROVED_QUICK); 7/C,<$Ep
} /Y|y0iK
private static String[] name={ nE;^xMOK!
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" t+y$i@R:
}; HGIPz{/5U
vMG>Xb
private static Sort[] impl=new Sort[]{ %c:v70*h=
new InsertSort(), OI/m_xx@j
new BubbleSort(), qM}Uk3N0
new SelectionSort(), ;r<(n3"F
new ShellSort(), b/;!yOF
new QuickSort(), :buH\LB*P
new ImprovedQuickSort(), 17kh6(X
new MergeSort(), c$fi3O
new ImprovedMergeSort(), su:~Xd
new HeapSort() WRIOjQ:
}; ^K[WFiN}
::?,ZA
public static String toString(int algorithm){ f0"N
return name[algorithm-1]; 4PdJ
} "MS}@NLUW
"$P|!k45(
public static void sort(int[] data, int algorithm) { q-? k=RX`
impl[algorithm-1].sort(data); 4sJM!9eb[
} w2 %u;D%
MX*T.TG8
public static interface Sort { 4H 4W
public void sort(int[] data); ''.P=
} V%|CCrR
F6'[8f
public static void swap(int[] data, int i, int j) { ui>0?O*G
int temp = data; Gz09#nFZk
data = data[j]; g<b(q|
data[j] = temp; $!Qv f
} AhozrroV
} mHj3ItXUu