[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; 4YR{ *
} *LuRo
int i1=l; 5:C>:pAV
int i2=mid+1; +L@\/=;G
for(int cur=l;cur<=r;cur++){ `r-3"or/$
if(i1==mid+1) UtQCTNjC{
data[cur]=temp[i2++]; ]Qa|9G,b
else if(i2>r) ! h92dH
data[cur]=temp[i1++]; o8v,178
else if(temp[i1] data[cur]=temp[i1++]; lJdYR'/Wd
else d={o|Mf
data[cur]=temp[i2++]; 1 -C~C]&
} "_&c[VptWi
} 0s\ -iub=d
ei{tW3 H$
} j%Xa8$
rs( e
改进后的归并排序: sFnR;
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package org.rut.util.algorithm.support; i5&,Bpfo-
_N)&<'lB<
import org.rut.util.algorithm.SortUtil; EU04U
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/** @65xn)CD{
* @author treeroot i]L=M 5^C
* @since 2006-2-2 C"%B>e
* @version 1.0 1ltW9^cF}
*/ 8n-Xt7z
public class ImprovedMergeSort implements SortUtil.Sort { .N@+Ms3
d3S Me
private static final int THRESHOLD = 10; 72.Msnn
U_j[<.aN)
/* |lg jI!iK
* (non-Javadoc) oveK;\7/m
* ~P"Agpx3u
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) nc\2A>f`
*/ aM(#J7;
public void sort(int[] data) { A~lc`m-
int[] temp=new int[data.length]; 41s\^'^&
mergeSort(data,temp,0,data.length-1); mfS}+_ C
} YOj&1ymBZ
}.Z`
private void mergeSort(int[] data, int[] temp, int l, int r) { q\|RI;W
int i, j, k; 0a^bAEP
int mid = (l + r) / 2; *|<~IQg
if (l == r) 1q3"qYH
return; 6vR6=@(`>
if ((mid - l) >= THRESHOLD) Xt$P!~Lu
mergeSort(data, temp, l, mid); @"1Z;.S8V
else x[Hx.G}5+
insertSort(data, l, mid - l + 1); 0"T/a1S7bl
if ((r - mid) > THRESHOLD) DR:DXJc
mergeSort(data, temp, mid + 1, r); O9/)_:Wdh
else QKB+mjMH#x
insertSort(data, mid + 1, r - mid); V$O6m|q
,aGIq. *v
for (i = l; i <= mid; i++) { |+::sL\r
temp = data; $I>]61l%
} #+V4<o
for (j = 1; j <= r - mid; j++) { i*m;kWu,
temp[r - j + 1] = data[j + mid]; ~:o$}`mW
} OKK Ko`RN
int a = temp[l]; n%#3xoa
int b = temp[r]; C;K+ITlJ
for (i = l, j = r, k = l; k <= r; k++) { ge.>#1f}
if (a < b) { =~Qg(=U0U
data[k] = temp[i++]; r|DIf28MIq
a = temp; REE.8_
} else { %.r\P@7/Q
data[k] = temp[j--]; *($,ay$&H
b = temp[j]; Xq03o#-p+
} oy5K* }
} ?kQY ^pU
} ;-@: }/
TK[[6IB
/** @KU;'th
* @param data !/u
* @param l xH{-UQ3R
* @param i 0F%8d@Y2
*/ ^>Z_3{s:$
private void insertSort(int[] data, int start, int len) { ZvT,HJ0?
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); ^uN[rHZ*u
} ?O#,{ZZf=
} 0#eb] c
} #)xlBq4cZ
} LO)!Fj4|
SJa>!]U'xI
堆排序： '@hUmrl
`x#S.b
package org.rut.util.algorithm.support; K-#d1+P+
D:bmq93PC
import org.rut.util.algorithm.SortUtil; !E?+1WDS0
JfSe; v
/** *8?2+)5"
* @author treeroot Uoe;=P@
* @since 2006-2-2 rDbtT*vN
* @version 1.0 oo &|(+"O_
*/ >| ,`E
public class HeapSort implements SortUtil.Sort{ WA43}CyAe
{G x=QNd
/* (non-Javadoc) {TpbUj0
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) y-nv#Ejr
*/ saiXFM7J
public void sort(int[] data) { %\sE\]K
MaxHeap h=new MaxHeap(); jIe /X]
h.init(data); =dA]nM
for(int i=0;i h.remove(); I@6+AU~,6
System.arraycopy(h.queue,1,data,0,data.length); )G^k$j
} JfWkg`LqL
WVpx
private static class MaxHeap{ '%ilF1#
kOD=H-vSi
void init(int[] data){ 7AT8QC`u
this.queue=new int[data.length+1]; WXmfh
for(int i=0;i queue[++size]=data; o [V8h@K)
fixUp(size); :qbU@)p*
} nfHjIYid
} iv+a5
):>?N`{V
private int size=0; 3c6e$/
Xzg >/w 8J
private int[] queue; J+IItO4%
!nkIXgWz
public int get() { "%D"h
return queue[1]; F}45.CrD
} Fy<:iv0>t
+%\Ci!%b
public void remove() { l3F$5n
SortUtil.swap(queue,1,size--); 5U7,,oyh
fixDown(1); F<p`)?
} `dV2\^*A
file://fixdown |}:}14ty
private void fixDown(int k) { fiWN^sTM
int j; K\%\p$ZD
while ((j = k << 1) <= size) { rrRv 7J&Q
if (j < size %26amp;%26amp; queue[j] j++; _ncBq;j{
if (queue[k]>queue[j]) file://不用交换 &v((tZ
break; [q!]Ds" _
SortUtil.swap(queue,j,k); iZfZF
k = j; oH0g>E;
} d)!'5ZrM
} 1O0. CC,p
private void fixUp(int k) { X:Wd%CHP
while (k > 1) { lmHQ"z 3G
int j = k >> 1; H ;=^ W
if (queue[j]>queue[k]) 0;><@{'
break; E`JW4)AH
SortUtil.swap(queue,j,k); AA^K/y
k = j; *s 4Ym
} )cizd^{
} 5`fUR/|[
bR"4:b>K
} -JEPh!oTt
e< @$(w
} 7Ji'7$
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SortUtil： JjI1^FRd
({Md({|
package org.rut.util.algorithm; Axb=1_--
Ix_w.f=8
import org.rut.util.algorithm.support.BubbleSort; &aIFtlC
import org.rut.util.algorithm.support.HeapSort; z{Yfiv\-r
import org.rut.util.algorithm.support.ImprovedMergeSort; / S' +
import org.rut.util.algorithm.support.ImprovedQuickSort; 7P3/Ky@6
import org.rut.util.algorithm.support.InsertSort; >>J$`0kM*
import org.rut.util.algorithm.support.MergeSort; jq]5Y^e
import org.rut.util.algorithm.support.QuickSort; sS{Co8EJn
import org.rut.util.algorithm.support.SelectionSort; B<BS^waU
import org.rut.util.algorithm.support.ShellSort; d.w]\
jG&HPVr
/** D~"a"
* @author treeroot x[TLlV:{
* @since 2006-2-2 30WOH 'n
* @version 1.0 U5j4iz'
*/ EMe1!)
public class SortUtil { y7h^_D+Ce
public final static int INSERT = 1; /PSXuVtu5
public final static int BUBBLE = 2; |)>+& xk
public final static int SELECTION = 3; M .6BFC
public final static int SHELL = 4; R%n*wGi_6b
public final static int QUICK = 5; c0e[vrP:
public final static int IMPROVED_QUICK = 6; ;|XX^
public final static int MERGE = 7; I@VzH(da\
public final static int IMPROVED_MERGE = 8; 2jhJXM=~
public final static int HEAP = 9; b4^O=
4=^Ha%l
public static void sort(int[] data) { Ms5qQ<0v_
sort(data, IMPROVED_QUICK); -32P}58R
} O{3X`xAf
private static String[] name={ 4KxuSI^q
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" T.z efoZ
}; dR=sdqS#J
a.UYBRP/l
private static Sort[] impl=new Sort[]{ o`QH8
new InsertSort(), (FGy"o%TP'
new BubbleSort(), &Hf%Va[B
new SelectionSort(), .,'4&}N}
new ShellSort(), /,~]1&?}1
new QuickSort(), aUa+]H[
new ImprovedQuickSort(), QPp31o.!5
new MergeSort(), MaPhG<?
new ImprovedMergeSort(), /YPG_,lRA
new HeapSort() bYQ@!
}; xv147"w'v
,if~%'9j
public static String toString(int algorithm){ OB=bRLd.IR
return name[algorithm-1]; 0#Us*:[6
} #+Bz$CO
C[TjcHoA
public static void sort(int[] data, int algorithm) { \>"Zn7
impl[algorithm-1].sort(data); CaED(0
} 4@F8-V3q4
:0%[u(
public static interface Sort { qh}+b^Wi
public void sort(int[] data); f$}g'r zl
} mPPB"uQ
3:$@DZT$
public static void swap(int[] data, int i, int j) { m7A3i<6p
int temp = data; vnbY^ASdw
data = data[j]; &09~ D8f'
data[j] = temp; O['[_1n_u]
} G]xN#O;
} cRag0.[