[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; i.Rl&t
} .11l(M
int i1=l; &kg^g%%
int i2=mid+1; NKO"'
for(int cur=l;cur<=r;cur++){ )7>GXZG>=
if(i1==mid+1) 7ftn gBv?
data[cur]=temp[i2++]; GJ,&$@8)
else if(i2>r) 3f7zW3F
data[cur]=temp[i1++]; J/je/PC
else if(temp[i1] data[cur]=temp[i1++]; &h334N|4{
else ,X?/FAcb
data[cur]=temp[i2++]; rVz.Ws#
} 9F/I",EA
} u\*9\G
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} +:FXtO>n"
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改进后的归并排序: \=ML*Gi*
* 65/gG8>
package org.rut.util.algorithm.support; Z1 D
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import org.rut.util.algorithm.SortUtil; G^c,i5}w
W0gS>L_
/** I=0c\ U}
* @author treeroot \OwF!~&
* @since 2006-2-2 Unk/uk
* @version 1.0 @{y'_fw
*/ }_D.Hy5
public class ImprovedMergeSort implements SortUtil.Sort { g*V.u]U!i
(T%F^s5D
private static final int THRESHOLD = 10; pR S!
V:n0BlZ,B
/* a"vzC$Hxd
* (non-Javadoc) Lw>B:3e
* [6!k:-t+
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) $Rm~ VwY#
*/ Fw<"]*iu
public void sort(int[] data) { @Q74
int[] temp=new int[data.length]; *S;}&VAZ
mergeSort(data,temp,0,data.length-1); 7>yd
} W'./p"2g
8}'iEj^e
private void mergeSort(int[] data, int[] temp, int l, int r) { ';I}6N
int i, j, k; \"O5li3n
int mid = (l + r) / 2; X=sE1RB
if (l == r) W:r[o%B
return; A!lZyG!3
if ((mid - l) >= THRESHOLD) K. ;ev
mergeSort(data, temp, l, mid); UsE\p9mCuV
else WyO*8b_ D
insertSort(data, l, mid - l + 1); (!}N&!t
if ((r - mid) > THRESHOLD) G+ /Q!ic
mergeSort(data, temp, mid + 1, r); ,>j3zjf^
else 6<&A}pp
insertSort(data, mid + 1, r - mid); YkKu4f
n8,%<!F^
for (i = l; i <= mid; i++) { Px_8lB/;
temp = data; gT)(RS`_)
} uN%Cc12
for (j = 1; j <= r - mid; j++) { vpu#!(N
temp[r - j + 1] = data[j + mid]; |J&\/8Q
} -nb U5o
int a = temp[l]; "hyfo,r
int b = temp[r]; tiK M+ ;C
for (i = l, j = r, k = l; k <= r; k++) { bQaRl=:[:
if (a < b) { EavBUX$O
data[k] = temp[i++]; B7\4^6Tx
a = temp; @yTu/U
} else { ZdW+=;/#
data[k] = temp[j--]; /$; Z ~^P
b = temp[j]; o-<i+To%
} M^kaik
} qYoW8e
} c~T{;
:w^:Z$-hf
/** Q7+WV`&
* @param data KMhrw s{&B
* @param l s\*p|vc
* @param i $xu2ZBK
*/ | R,dsBd
private void insertSort(int[] data, int start, int len) { PF4[;ES'
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); UynGG@P@
} A;Uc&G
} QYA4C1h'
} QytO0K5
} ?1\5X<|,
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堆排序： wX] _Abk
*"^X)Y{c+l
package org.rut.util.algorithm.support; AH,?B*zGj
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import org.rut.util.algorithm.SortUtil; tY_=[6?Zu
dX?j/M-
/** G]B0LUT6c
* @author treeroot >\JPX
* @since 2006-2-2 oIrc))j,$
* @version 1.0 ckX8eg!f
*/ L91(|gQP
public class HeapSort implements SortUtil.Sort{ HG7Qdw2+O
+C=vuR
/* (non-Javadoc) I]ej ]46K
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) .\bJ,of9
*/ dOD(<
public void sort(int[] data) { lr&2,p<
MaxHeap h=new MaxHeap(); AG >D,6Y
h.init(data); tN{0C/B9
for(int i=0;i h.remove(); l&H-<Z.8m
System.arraycopy(h.queue,1,data,0,data.length); {A}T^q!m]
} <(E)M@2
(s'xO~p
private static class MaxHeap{ P0UR{tK
caEIE0H~
void init(int[] data){ n^'d8Y(
this.queue=new int[data.length+1]; aMqt2{f+
for(int i=0;i queue[++size]=data; i7H([b<_m
fixUp(size); k2Q[v
} %[n5mF*`
} (0`rfYv5.R
puOMtCI
private int size=0; #7fOH U8v
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private int[] queue; |mhKD#:
oX6Cd:c-
public int get() { >uCO=T,|
return queue[1]; D u<P^CE
} ~Dg:siw
@.e4~qz\
public void remove() { :/->m6C`0
SortUtil.swap(queue,1,size--); xEG:KSH
fixDown(1); py$Gy-I~[
} GUQ3XF\
file://fixdown ]`-o\,lq
private void fixDown(int k) { jzi%[c<G
int j; *r>Y]VG;S
while ((j = k << 1) <= size) { 1drg5
if (j < size %26amp;%26amp; queue[j] j++; bP:u`!p -i
if (queue[k]>queue[j]) file://不用交换 q4:zr
break; "4XjABJ4'
SortUtil.swap(queue,j,k); !@V]H
k = j; s\'t=}0q
} -/8V2dv3
} qLBQ!>lR
private void fixUp(int k) { 8Ogg(uS70'
while (k > 1) { Ez <YD
int j = k >> 1; a[t"J*0
if (queue[j]>queue[k]) V xN!Ki=
break; i@{b+5$
SortUtil.swap(queue,j,k); #~Kno@
k = j; j\#)'>"
} C4E*q3[Y
} D[T\_3W
L{sFR^-G
} E:}s6l
Njo.-k
} L `2{H%J`
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SortUtil： aV fsF|,
9Eh*r@>
package org.rut.util.algorithm; 25G~rklk
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import org.rut.util.algorithm.support.BubbleSort; NX8w(~r,:
import org.rut.util.algorithm.support.HeapSort; Xe}I;sKrB
import org.rut.util.algorithm.support.ImprovedMergeSort; = CXX.%N
import org.rut.util.algorithm.support.ImprovedQuickSort; 0>Kgz!I
import org.rut.util.algorithm.support.InsertSort; ~Q- /O~
import org.rut.util.algorithm.support.MergeSort; i&HU7mP/
import org.rut.util.algorithm.support.QuickSort; =)#XZ[#F
import org.rut.util.algorithm.support.SelectionSort; B"7~[,he
import org.rut.util.algorithm.support.ShellSort; a#0*#&?7@
&w_8E+YZ
/** y=GDuU%
* @author treeroot BAqwYWdS
* @since 2006-2-2 D$hK
* @version 1.0 0Dd8c\J
*/ s$^ 2Cuhv
public class SortUtil { GWx?RIKF
public final static int INSERT = 1; eT F s9$
public final static int BUBBLE = 2; H1evW
public final static int SELECTION = 3; 45+kwo0
public final static int SHELL = 4; MNfc1I_#
public final static int QUICK = 5; %*L8W*V
public final static int IMPROVED_QUICK = 6; lz).=N}m
public final static int MERGE = 7; %AMF6l[
public final static int IMPROVED_MERGE = 8; _=w=!U&W
public final static int HEAP = 9; CS^|="Zs
787i4h:71
public static void sort(int[] data) { ?r0>HvUf!l
sort(data, IMPROVED_QUICK); ylmVmHmc
} * se),CP!s
private static String[] name={ ~@^pX*%i
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" OoOwEV2p_
}; (Q"s;g
WAr6Dv,8
private static Sort[] impl=new Sort[]{ ohPXwp?]
new InsertSort(), C-2#-{<
new BubbleSort(), eET1f8B=L
new SelectionSort(), 5IG#-Q(6sp
new ShellSort(), .v) A|{:2
new QuickSort(), `?N|{kb
new ImprovedQuickSort(), %H"AHkge:a
new MergeSort(), _hB7;N3
new ImprovedMergeSort(), r^d:Po
new HeapSort() X)Rh&ui
}; O sIvW'$\
&53LJlL Co
public static String toString(int algorithm){ G*VcAJ[
return name[algorithm-1]; E-rGOm" m
} =HoA2,R)
$+ \JT/eG9
public static void sort(int[] data, int algorithm) { ;;17 #T2
impl[algorithm-1].sort(data); %Y].i/".;P
} h*NBSvn
X{5(i3?S
public static interface Sort { #w[Ie+
public void sort(int[] data); \T!tUd
} $8_b[~%2
m!<uY?,hf
public static void swap(int[] data, int i, int j) { w##$SaTI
int temp = data; c+TCC%AJQI
data = data[j]; )J|~'{z:
data[j] = temp; J16(d+
} @}e5T/{X}T
} 5,V3_p:)VI