[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; ayQ2#9X}
} 8\HzFB
int i1=l; *g[MGyF"
int i2=mid+1; Cm;M; ?
for(int cur=l;cur<=r;cur++){ &6nLnMF8x
if(i1==mid+1) Q+ZZwqyxD
data[cur]=temp[i2++]; hd@jm^k
else if(i2>r) 3a}53?$
data[cur]=temp[i1++]; CI^s~M >
else if(temp[i1] data[cur]=temp[i1++]; 8~ u/gM
else QM@zy
data[cur]=temp[i2++]; vF1Fcp.@
} w$"^)EG,7
} nB6 $*'
O2"5\@HfE
} 4|;Ys-Q
$+$4W\-=X
改进后的归并排序: vL8Rg} Jh4
zJo?,c
package org.rut.util.algorithm.support; F(|XJN
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import org.rut.util.algorithm.SortUtil; c/E'GG%Q%
k{D0&
/** st)qw]Dn;Y
* @author treeroot l"/E,X
* @since 2006-2-2 m}6Jdt'|
* @version 1.0 -`UOqjb]3
*/ 2WC$r8E
public class ImprovedMergeSort implements SortUtil.Sort { *U +<Hv`C
jcHyRR1R
private static final int THRESHOLD = 10; y%O^Zm1
;.=]Ar}
/* n0g8B
* (non-Javadoc) gFl@A}
* @D>qo=KPM
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) I>{o]^xw-D
*/ m"!Q5[
public void sort(int[] data) { c2-oFLNP=
int[] temp=new int[data.length]; OAf}\
mergeSort(data,temp,0,data.length-1); [ps4i_
} 1)!2D?w
`R!Q(rePx
private void mergeSort(int[] data, int[] temp, int l, int r) { g{CU1c)B
int i, j, k; nf1O8FwRb
int mid = (l + r) / 2; wV-9T*QrM
if (l == r) $$i Gs6az
return; Up0kTL
if ((mid - l) >= THRESHOLD) TjHt:%7.
mergeSort(data, temp, l, mid); 2D/bMq
else Xyjd7"
insertSort(data, l, mid - l + 1); -kHJH><j
if ((r - mid) > THRESHOLD) _=}.Sg5Q
mergeSort(data, temp, mid + 1, r); g'cVsO)S
else aW9\h_$
insertSort(data, mid + 1, r - mid); xjD."q
X8):R- J
for (i = l; i <= mid; i++) { kPoz&e_@
temp = data; I51I(QF=
} ~F%sO'4!
for (j = 1; j <= r - mid; j++) { q1v7(`O
temp[r - j + 1] = data[j + mid]; 29cx(
} *HB 32 =qD
int a = temp[l]; gegM&Xo
int b = temp[r]; H4W!Md
for (i = l, j = r, k = l; k <= r; k++) { -fp/3-
if (a < b) { o`G6!
data[k] = temp[i++]; -ijzo%&qA
a = temp; cbl>:ev1h
} else { ESUO I
data[k] = temp[j--]; "Mz#1Laby`
b = temp[j]; =cO5Nt
} IwRP,MQ~
} rgDl%X2B
} >@Pw{Zh$
%J Jp/I
/** `vz7}TY
* @param data g)=$zXWhP
* @param l :zY;eJKm
* @param i f@[)*([
*/ %a FZbLK
private void insertSort(int[] data, int start, int len) { -*Tf.c
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); '#SZ|Rr6tX
} JI cm$
} $@O?
} eK5~YM:o
} ug.|ag'R
|P`b"x
堆排序： }Xfg~%6
~f"3Wa*\B
package org.rut.util.algorithm.support; kR3wbA
%a|Qw(4\
import org.rut.util.algorithm.SortUtil; oUO3,2bn
J%n#uUs
/** l fFRqZ
* @author treeroot @,7r<6E
* @since 2006-2-2 Pm%5c\ef
* @version 1.0 P(DEf(
*/ -%| ] d ;
public class HeapSort implements SortUtil.Sort{ ;Yv{)@'Bc
E0/>E
/* (non-Javadoc) [oXSjLQm[
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 'IFA>}e7W
*/ _`gkYu3R+
public void sort(int[] data) { )B+R|PZ,
MaxHeap h=new MaxHeap(); ("F$r$9S
h.init(data); -2!S>P Zs
for(int i=0;i h.remove(); :J_UXtx
System.arraycopy(h.queue,1,data,0,data.length); #Hz9@H
} 'CSjj@3X
_iCrQJ0"T
private static class MaxHeap{ m5&Ht (I%n
X)6G:cD
void init(int[] data){ l0;u$
this.queue=new int[data.length+1]; ]uF7HX7F
for(int i=0;i queue[++size]=data; E_I-.o|
fixUp(size); Y652&{>q
} ITg:OOQ
} ,A $IFE
tQRbNY#}Z
private int size=0; GyMN;|
/W`CqJk-*.
private int[] queue; _KKux3a
F(zCvT
public int get() { lNf);!}SM
return queue[1]; o5 ~VT!'[
} w=<E)
>2#<tH0
public void remove() { Z,SV9 ~M
SortUtil.swap(queue,1,size--); (n8?+GCa
fixDown(1); )">#bu$
} yz!L:1DG
file://fixdown 2wnk~URj
private void fixDown(int k) { YFPse.2$a
int j; pdER#7Tq
while ((j = k << 1) <= size) { Fx}v.A5
if (j < size %26amp;%26amp; queue[j] j++; *0Z6H-Do,
if (queue[k]>queue[j]) file://不用交换 3 !8#wn
break; (9ZW^flY
SortUtil.swap(queue,j,k); AZE%fOG<i
k = j; )Ute
} kr|r-N`
} (T$cw(!
private void fixUp(int k) { *3E3,c8{A
while (k > 1) { 5'+g[eNyBV
int j = k >> 1; }No#_{
if (queue[j]>queue[k]) R.2i%cU
break; n0gjcDHQ
SortUtil.swap(queue,j,k); H^5,];
k = j; lP)n$?u
} 5+!yXkE^e
} Pv,PS.,-
V6](_w!
} :RukW.MR
lK7:qo
} pfIK9>i
xzOvc<u
SortUtil： A'7Y{oPHX
$H.U ~
package org.rut.util.algorithm; {fDRVnI?
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import org.rut.util.algorithm.support.BubbleSort; BeQ'\#q,
import org.rut.util.algorithm.support.HeapSort; Ix,b-C~
import org.rut.util.algorithm.support.ImprovedMergeSort; $*$4DG1gaR
import org.rut.util.algorithm.support.ImprovedQuickSort; "%+||IyW
import org.rut.util.algorithm.support.InsertSort; 4[gbRn'
import org.rut.util.algorithm.support.MergeSort; ": BZZ\!
import org.rut.util.algorithm.support.QuickSort; f/Y7@y
import org.rut.util.algorithm.support.SelectionSort; "PElQBLP:
import org.rut.util.algorithm.support.ShellSort; 0sKoNzE
[ ^\{>m7
/** lH`c&LL-=!
* @author treeroot +mD;\iW]
* @since 2006-2-2 ~,};FI
* @version 1.0 yK"\~t[@X:
*/ Qi dI
public class SortUtil { w5s&Ws
public final static int INSERT = 1; w5)KWeGa
public final static int BUBBLE = 2; "N_@q2zF
public final static int SELECTION = 3; /O$~)2^h
public final static int SHELL = 4; Q.7X3A8
public final static int QUICK = 5; z1,#ma}.
public final static int IMPROVED_QUICK = 6; m(:R(K(je
public final static int MERGE = 7; S1)g\Lv
public final static int IMPROVED_MERGE = 8; MIl\Bn
public final static int HEAP = 9; ]j,o!|rx7
H|aC(c
public static void sort(int[] data) { (zy|>u
sort(data, IMPROVED_QUICK); g'T L`=O
} ,wg(}y'
private static String[] name={ |0uqW1
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" ? eI)m
}; N4-Y0BO
.Wp(@l'Hd
private static Sort[] impl=new Sort[]{ |B$JX'_
new InsertSort(), *gGw/jA/
new BubbleSort(), ^/Yk*Ny
new SelectionSort(), ^t<L
new ShellSort(), rfQs 7S;G
new QuickSort(), g0a!auWM
new ImprovedQuickSort(), WuF\{bUh
new MergeSort(), v,N!cp1
new ImprovedMergeSort(), NcwUK\
new HeapSort() XPq`;<G
}; oa7 N6
5syzh S
public static String toString(int algorithm){ ASMItT
return name[algorithm-1]; -:L7iOzgD
} PIFZ '6gn
R6>*n!*D@
public static void sort(int[] data, int algorithm) { &1=,?s]&
impl[algorithm-1].sort(data); v6aMYmenBH
} X=6L-^o)
hHcevSr
public static interface Sort { ~e,K
public void sort(int[] data); `Has3AX8
} C'l\4ij)7
j+/EG^*/
public static void swap(int[] data, int i, int j) { -~\7ZRP8
int temp = data; 54TWFDmGi
data = data[j]; F/p1?1M
data[j] = temp; Yu&\a?]\2
} FU}- .Ki
} QJkiu8r