[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`3dWL
} Nz~(+pVWg5
int i1=l; [*Q-nZ/L
int i2=mid+1; kl" ]Nw'C
for(int cur=l;cur<=r;cur++){ hp*<x4%*a"
if(i1==mid+1) t\8&*(&3F
data[cur]=temp[i2++]; h1#S+k
else if(i2>r) Gz?2b#7v
data[cur]=temp[i1++]; MU|{g 5/ )
else if(temp[i1] data[cur]=temp[i1++]; E#8_hT]5
else qU#$2
data[cur]=temp[i2++]; lzEb5mg
} [[w2p
} |H8^
q/$GE,"
} be7L="vZw
t:>x\V2m
改进后的归并排序: a5a1'IVq
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package org.rut.util.algorithm.support; =L"^.c@
SET-8f
import org.rut.util.algorithm.SortUtil; BEWro|]cM
j&WL*XP&5
/** [EgW/\35
* @author treeroot SG:bM7*1'
* @since 2006-2-2 fD{II+T
* @version 1.0 >B_n/v3P(M
*/ ^_68]l=
public class ImprovedMergeSort implements SortUtil.Sort { n+HsQ]z.
aVwH
private static final int THRESHOLD = 10; Ea4_Qmn
jq(qo4~;
/* X"j>=DEX
* (non-Javadoc) ^;r+W-MQ
* W5.Va.
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) `B:"6nW6
*/ e0 u,zg+m
public void sort(int[] data) { \, 8p1$G
int[] temp=new int[data.length]; b#/i.!:a
mergeSort(data,temp,0,data.length-1); 03([@d6<E
} / +1{
R"3 M[^
private void mergeSort(int[] data, int[] temp, int l, int r) { -f9]v9|l
int i, j, k; @A{m5h
int mid = (l + r) / 2; h%TLD[[/jr
if (l == r) WhFS2Jl0
return; ]GX \|1L
if ((mid - l) >= THRESHOLD) F\:(*1C
mergeSort(data, temp, l, mid); Hm fXe
else ,gMy@
insertSort(data, l, mid - l + 1); L\e>B>u
if ((r - mid) > THRESHOLD) R*9NR,C
mergeSort(data, temp, mid + 1, r); pZk6w1d!
else }"_j0ax
insertSort(data, mid + 1, r - mid); u[")*\CP
!8R@@,_v
for (i = l; i <= mid; i++) { ZCYS\E7X
temp = data; cSK&[>i)4
} U>P|X=)
for (j = 1; j <= r - mid; j++) { !^y y0`k6
temp[r - j + 1] = data[j + mid]; XV>&F{
} !VP %v&jKm
int a = temp[l]; {q3:Z{#>7
int b = temp[r]; 7NL%$Vf
for (i = l, j = r, k = l; k <= r; k++) { 8;8c"'Mn
if (a < b) { A\AT0th
data[k] = temp[i++]; r?A|d.Tl
a = temp; hat>kXm2K
} else { )R?;M
data[k] = temp[j--]; ECcZz.
b = temp[j]; tmJgm5v
} j U[ O
} A6{b?aQ
} 909md|9K3
T9syo/(
/** AIRr{Y
* @param data }]+xFj9[>
* @param l o''wCr%
* @param i ;%!B[+ut"
*/ c</1
private void insertSort(int[] data, int start, int len) { ;%Hf)F
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); >cN~U3
} 7dOyxr"H-
} tX%`#hb?s
} P0Z!?`e=M
} /6+NU^
[/ M`
堆排序： L}sx<=8.m
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package org.rut.util.algorithm.support; +jP~s
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import org.rut.util.algorithm.SortUtil; ]zfG~^.
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/** .S?pG_n]f
* @author treeroot XYEv&-M`?w
* @since 2006-2-2 a%vrt)Gx
* @version 1.0 en*d/>OVJ
*/ E?)656F[
public class HeapSort implements SortUtil.Sort{ k\`S lb1
o<i,*y88
/* (non-Javadoc) b)#Oc,
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) c#/H:?q?a
*/ H1EDMhn/
public void sort(int[] data) { CC^E_jT
MaxHeap h=new MaxHeap(); Vz=auM1xZ
h.init(data); I97yt[,Yy
for(int i=0;i h.remove(); #^#HuDH
System.arraycopy(h.queue,1,data,0,data.length); 8,"yNq
} vZj`|
O) atNE
private static class MaxHeap{ SHVWwoieT
Jc6R{C
void init(int[] data){ >rsqH+oL
this.queue=new int[data.length+1]; ?sz)J3
for(int i=0;i queue[++size]=data; .;7> y7$*
fixUp(size); r|Z5Xc
} #/2$+x
} I@#;nyAj"
p[AO' xx
private int size=0; >slm$~rv
hr05L<?H
private int[] queue; kzn[ =P
Z;l`YK^-
public int get() { UBv@+\Y8m
return queue[1]; ?:{sH#ua
} ^5GW$
W,^W^:m-x
public void remove() { \daZk/@
SortUtil.swap(queue,1,size--); aUHcYc\u
fixDown(1); ao_4mSB
} '(GiF
file://fixdown $Xm6N@
private void fixDown(int k) { `o]g~AKX
int j; #>=j79~
while ((j = k << 1) <= size) { RwI[R)k
if (j < size %26amp;%26amp; queue[j] j++; gKz(=
if (queue[k]>queue[j]) file://不用交换 {--0z3n>
break; Z/;Xl~
SortUtil.swap(queue,j,k); 5irwz4.4
k = j; fA/m1bYxg
} 1923N]b
} \s"U{N-
private void fixUp(int k) { 'H5M|c$s
while (k > 1) { gKLyL]kAGz
int j = k >> 1; 2d%}- nw
if (queue[j]>queue[k]) X$%4$
break; 9,j-Vp!G
SortUtil.swap(queue,j,k); <f@"HG l
k = j; Wq*b~Lw
} $$b 9&mTl#
} ;Gx)Noo/>
/sM~Uq?
} xx{!3 F
y[B>~m8$
} oi}i\: hI
d8-A*W[
SortUtil： 98=wnWX6$
fb8%~3i>
package org.rut.util.algorithm; akw,P$i
.#02 ngh
import org.rut.util.algorithm.support.BubbleSort; }_=eT]
import org.rut.util.algorithm.support.HeapSort; )i+2X5B`S
import org.rut.util.algorithm.support.ImprovedMergeSort; T91moRv
import org.rut.util.algorithm.support.ImprovedQuickSort; 3(C\.oRc
import org.rut.util.algorithm.support.InsertSort; W>-Et7&2
import org.rut.util.algorithm.support.MergeSort; ;XM{o:1Y[
import org.rut.util.algorithm.support.QuickSort; f&v9Q97=
import org.rut.util.algorithm.support.SelectionSort; "-@[R
import org.rut.util.algorithm.support.ShellSort; Z{&cuo.@<]
D}8EERb
/** Eu"_MgD
* @author treeroot C8FB:JNJV
* @since 2006-2-2 rZ8`sIWQt
* @version 1.0 p<=$&*
*/ 4pw6bK,s2\
public class SortUtil { 87hq{tTs]
public final static int INSERT = 1; =zQN[
public final static int BUBBLE = 2; KYzv$oK
public final static int SELECTION = 3; y;/VB,4V
public final static int SHELL = 4; w]N!S;<N
public final static int QUICK = 5; H":oNpfb
public final static int IMPROVED_QUICK = 6; 6Gf?m;
public final static int MERGE = 7; boDt`2=
public final static int IMPROVED_MERGE = 8; x _c[B4Tw
public final static int HEAP = 9; mI74x3 [
>/|q:b^2r
public static void sort(int[] data) { I`NjqyTW
sort(data, IMPROVED_QUICK); M4as
} w@,zFV
private static String[] name={ E>l~-PaZY
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 98^V4maR:
}; 13taFVdU
1GzAG;UUo6
private static Sort[] impl=new Sort[]{ s[UHe{^T
new InsertSort(), T=ev[ mS
new BubbleSort(), ;*MLRXq
new SelectionSort(), eM8}X[
new ShellSort(), #U14-^7
new QuickSort(), X&kp;W
new ImprovedQuickSort(), om1eQp0N
new MergeSort(), .V,@k7U,V
new ImprovedMergeSort(), ](hE^\SC
new HeapSort() =>-Rnc@
}; =?!wXOg_
#\=FO>
public static String toString(int algorithm){ ^0Mt*e{q
return name[algorithm-1]; `nu''B H
} <Y}R#o1Z
8i2n;LAz
public static void sort(int[] data, int algorithm) { 4r45i:
impl[algorithm-1].sort(data); q<M2,YrbAI
} hIT+gnhh
79;<_(Y
public static interface Sort { $&=S#_HQS
public void sort(int[] data); c Vc-
} uA<n
|p,P46I
public static void swap(int[] data, int i, int j) { m;,N)<~
int temp = data; 1jcouD5?H
data = data[j]; FYpzQ6s~
data[j] = temp; :=Nz}mUV
} ')cMiX\v
} fb~ytl<