[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; Tw9?U,]
} -&r A<j
int i1=l; h,P#)^"
int i2=mid+1; {8J+Y}
for(int cur=l;cur<=r;cur++){ UQ+!P<>w
if(i1==mid+1) zT jk^
data[cur]=temp[i2++]; o$,e#q)8
else if(i2>r) b$eZ>X
data[cur]=temp[i1++]; l%MIna/Tp
else if(temp[i1] data[cur]=temp[i1++]; Blv@u?
else -<aN$O
data[cur]=temp[i2++]; hN.{H:skL)
} hxsW9
} <qCfw>%2F
7bx!A+, t
} %x|0<@b7-
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改进后的归并排序: xX{gm'3UYa
P}mn2Hs
package org.rut.util.algorithm.support; N(L?F):fT
c=~FXV!
import org.rut.util.algorithm.SortUtil; Vw b6QIs
/}RW~ax
/** $rmfE
* @author treeroot C(5B/W6
* @since 2006-2-2 4$jb-Aw
* @version 1.0 %n>*jFC
*/ L2^M#G@t
public class ImprovedMergeSort implements SortUtil.Sort { I0C$
(Zv/(SE5%
private static final int THRESHOLD = 10; w;KNS'
Ct30EZ
/* zX ?@[OT
* (non-Javadoc) ~!TRR.
* ##qs{s^]
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) :<>=,`vQD
*/ ~>|o3&G{
public void sort(int[] data) { [78^:q-/0
int[] temp=new int[data.length]; uOprA`3
mergeSort(data,temp,0,data.length-1); 63y&MaqSJ
} ma(E}s
,.&y-?
private void mergeSort(int[] data, int[] temp, int l, int r) { jsnk*>j
int i, j, k; ayoqitXD?
int mid = (l + r) / 2; 1A-ess\
if (l == r) R3gg{hQ
return; \v[?4[
if ((mid - l) >= THRESHOLD) YVB\9{H?
mergeSort(data, temp, l, mid); ld/\`s[i
else UqaV9
insertSort(data, l, mid - l + 1); @EzO bE{
if ((r - mid) > THRESHOLD) w#\*{EN
mergeSort(data, temp, mid + 1, r); uj9IK
else pcjb;&<
insertSort(data, mid + 1, r - mid); 5t~p99#?
'J"m`a8no
for (i = l; i <= mid; i++) { 7>>6c7e
temp = data; dUL3UY3
} DZ~qk+,I
for (j = 1; j <= r - mid; j++) { V50FX}i
temp[r - j + 1] = data[j + mid]; l|p \8=
} ?:XbZ"25pJ
int a = temp[l]; "OO"Ab{t
int b = temp[r]; l9Sx'<
for (i = l, j = r, k = l; k <= r; k++) { $M 1/74
if (a < b) { T`.RP&2/d
data[k] = temp[i++]; or{X{_X7
a = temp; %>Y86>mVz
} else { ]S#m o
data[k] = temp[j--]; h#!u"'JW
b = temp[j]; E;Sb e9]
} vTY+J$N__
} ffqz :6
} .,5N/p"aV
a+Z95~*sZ"
/** #^~[\8v>
* @param data N++jI(
* @param l (:2,Rr1"
* @param i `cBV+00YS
*/ m?Qr)F_M
private void insertSort(int[] data, int start, int len) { J}UG{RttI
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); ,/>hWAx
} ;.4A,7w#
} (( D*kd"
} o:irwfArv
} ,3tcti~sZ
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堆排序： \$] V#@F
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package org.rut.util.algorithm.support; qFD#D_O6
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import org.rut.util.algorithm.SortUtil; o|?bvFC
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/** Eax^1 |6
* @author treeroot ni$S@0
* @since 2006-2-2 _H+|Ic
* @version 1.0 UfUboxT
*/ g-Y2U}&
public class HeapSort implements SortUtil.Sort{ CZL:&~l1
5s'oVO*hW
/* (non-Javadoc) {q-<1|xj/J
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) &58+-jzW
*/ z]Dbca1a`
public void sort(int[] data) { }+fMYgw
MaxHeap h=new MaxHeap(); R|Lr@k{6+r
h.init(data); 05cyWg9a
for(int i=0;i h.remove(); - s,M+Q(<
System.arraycopy(h.queue,1,data,0,data.length); U3f a*D
} =6sL}$
Pgg\(D#X`
private static class MaxHeap{ ub0uxvz
gI SP .
void init(int[] data){ ?4 fXCb]7
this.queue=new int[data.length+1]; NlS/PWc6(
for(int i=0;i queue[++size]=data; ] 3@.)
fixUp(size); <-1(G1v
} 0*F{=X~L
} c[~LI<>ic
}(/")i4h
private int size=0; 30fsVwE2
Ikn)XZU^
private int[] queue; %ur_DQ
Z`=[hu
public int get() { ,r-l^I3<
return queue[1]; lj4D:>Ov
} H8g1SMT
EGZF@#N
public void remove() { 5D32d1A
SortUtil.swap(queue,1,size--); nCz_gYcIx
fixDown(1); ` 5.PPI\h2
} eKq`t.*Ft
file://fixdown _ xAL0 (
private void fixDown(int k) { `T gwa
int j; dBKceL v
while ((j = k << 1) <= size) { T7!"gJ
if (j < size %26amp;%26amp; queue[j] j++; _rz*7-ks=
if (queue[k]>queue[j]) file://不用交换 ]}~[2k.
break; H~IN<3ko
SortUtil.swap(queue,j,k); I-QaR
k = j; 2$g3ABfV
} i8\&J.
} Tjfg[Z/x
private void fixUp(int k) { LyRU2A
while (k > 1) { ,&1DKx
int j = k >> 1; d&dp#)._8
if (queue[j]>queue[k]) &3Q!'pJJ
break; Z*}5M4
SortUtil.swap(queue,j,k); $:#{Y;d
k = j; `Eijy3>h
} Tw!]N%E
} >0W:snNK
!8Rsz:7^-
} vT#$`M<
{p{TG5rwX
} G8y:f%I!b
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SortUtil： 1q])"l"<
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package org.rut.util.algorithm; 3=reN6Q
thYG1Cs
import org.rut.util.algorithm.support.BubbleSort; E0miX)AG
import org.rut.util.algorithm.support.HeapSort; p@H3NX
import org.rut.util.algorithm.support.ImprovedMergeSort; #sn2Vmi
import org.rut.util.algorithm.support.ImprovedQuickSort; PfaBzi9?f
import org.rut.util.algorithm.support.InsertSort; J;K-Pv+
import org.rut.util.algorithm.support.MergeSort; Fo=hL
import org.rut.util.algorithm.support.QuickSort; "pDwN$c
import org.rut.util.algorithm.support.SelectionSort; 'Y ZYRFWXM
import org.rut.util.algorithm.support.ShellSort; FY^[?lj
dU7+rc2,CU
/** (QPfrR=J4
* @author treeroot TsPx"+>7`
* @since 2006-2-2 y&HfF~
* @version 1.0 f__r" N
*/ .#M'
public class SortUtil { #bqc}h9
public final static int INSERT = 1; l Ikh4T6i
public final static int BUBBLE = 2; G d".zsn
public final static int SELECTION = 3; 1^*M*>&d<
public final static int SHELL = 4; z%Xz*uu(|
public final static int QUICK = 5; VOkEDH
public final static int IMPROVED_QUICK = 6; =@ '>|-w|
public final static int MERGE = 7; X*'tJN$
public final static int IMPROVED_MERGE = 8; HAHv^
public final static int HEAP = 9; Oie0cz:>:
X}~5%B(
public static void sort(int[] data) { \ 2$nFr?0
sort(data, IMPROVED_QUICK); QBg~b{h
} nhfHY-l}7
private static String[] name={ %Ts6M,Fpp
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" QEe\1>1"&
}; }=1#ANM1
$*035f
private static Sort[] impl=new Sort[]{ bZ-"R 6a$
new InsertSort(), y<Hka'(%
new BubbleSort(), @WV}VKm
new SelectionSort(), vtvF)jlX
new ShellSort(), "ooq1 0P
new QuickSort(), r[ UZHX5+S
new ImprovedQuickSort(), .Ulrv5wJ
new MergeSort(), 1@&i ju5
new ImprovedMergeSort(), )T-C/ 3
new HeapSort() He#5d!cf:M
}; xz-z" 8d
uQwKnD?F+e
public static String toString(int algorithm){ gWxpGW^eZ~
return name[algorithm-1]; MZyzc{c,
} ,t`u3ykh
Y:GSjq
public static void sort(int[] data, int algorithm) { VJK?"mX
impl[algorithm-1].sort(data); ^xWu7q
} }@kD&2
FKTdQg|NZ
public static interface Sort { J}Q4.1WG$
public void sort(int[] data); *hhPCYOm
} n+C]&6-b
qSB]Zm<
public static void swap(int[] data, int i, int j) { HLL[r0P`F
int temp = data; 'W!N1W@
data = data[j]; 8oM]gW;J~
data[j] = temp; ?-40bb
} b51{sL
} B0_[bQoc1