[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; vhuw&.\
} <plC_{Y:wu
int i1=l; D]s]"QQ8
int i2=mid+1; M$Zo.Bl$(
for(int cur=l;cur<=r;cur++){ ,)!u)wz
if(i1==mid+1) (Y%Q|u
data[cur]=temp[i2++]; j2l55@
else if(i2>r) <M]h{BS=
data[cur]=temp[i1++]; 'R<&d}@P*#
else if(temp[i1] data[cur]=temp[i1++]; $,>@o=)_
else 9Z5D\yv?H
data[cur]=temp[i2++]; 3q:n'PC)C
} fq[;%cr4
} +>~?m*$
YW\0k5[
} R%D'`*+
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改进后的归并排序: 6 15s5ZA
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package org.rut.util.algorithm.support; ?ULo&P[
%M|,b!eF
import org.rut.util.algorithm.SortUtil; !2UOC P
3bZIYF2@
/** `+:.L>5([
* @author treeroot !HeSOzN
* @since 2006-2-2 ^u}L;`L
* @version 1.0 /walu+]h
*/ *+'2?*
public class ImprovedMergeSort implements SortUtil.Sort { dC\ZjZZ
u]+~VT1C,3
private static final int THRESHOLD = 10; 7pA/
I\~G|B
/* hI?sOR!
* (non-Javadoc) Rm1A>1a:
* A\_|un%
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) + b$=[nfG
*/ :j')E`#
public void sort(int[] data) { &!aAO(g
int[] temp=new int[data.length]; <s5qy-
mergeSort(data,temp,0,data.length-1); 5]I|DHmu
} ofYlR|
##Q/I|
private void mergeSort(int[] data, int[] temp, int l, int r) { [.hyZ}B
int i, j, k; h_1T,f(
int mid = (l + r) / 2; 8}X5o]Mv
if (l == r) uXDq~`S
return; Ghl'nqPlm
if ((mid - l) >= THRESHOLD) g.c8FP+
mergeSort(data, temp, l, mid); KDl_?9E5
else Hn>B!Bm*
insertSort(data, l, mid - l + 1); I1oje0$
if ((r - mid) > THRESHOLD) #_Z$2L"U
mergeSort(data, temp, mid + 1, r); ?m$a6'2-,J
else Uj+j}C
insertSort(data, mid + 1, r - mid); a22Mufl
b^D$jY
for (i = l; i <= mid; i++) { X|0R=n]
temp = data; kg@>;(V&
} }g#&Q0
for (j = 1; j <= r - mid; j++) { t5)+&I2
temp[r - j + 1] = data[j + mid]; Hqnxq
} c|F[.;cR
int a = temp[l]; [V'QrcCF
int b = temp[r]; ^Q*atU
for (i = l, j = r, k = l; k <= r; k++) { '>$]{vQ3
if (a < b) { E0%~!b
data[k] = temp[i++]; s&\I=J.
a = temp; B+^(ktZp@
} else { k+I}PuG
data[k] = temp[j--]; !RyO\>:q
b = temp[j]; \#o2\!@`
} K=!Bh*
} fwK}/0%
} (b'B%rFO
V $z} K
/** =@k%&* Y?
* @param data upj]6f"(
* @param l OHiQ7#y
* @param i w =.Fj
*/ [mEql,x3
private void insertSort(int[] data, int start, int len) { U=hlu
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); Y"-^%@|p
} =+t^f
} s"Pf+aTW
} n,B,"\fw
} "#(T
P/EM :
堆排序： J|'7_0OAx
Ut$;ND.-
package org.rut.util.algorithm.support; kP/M<X"
v1a6?-
import org.rut.util.algorithm.SortUtil; gX0R)spg
\(t@1]&jw
/** u7?$b!hG^C
* @author treeroot rQ7+q;[J
* @since 2006-2-2 P!"&%d
* @version 1.0 6mKjau{r_
*/ )_/5*Ly@
public class HeapSort implements SortUtil.Sort{ v3v[[96p
[D*UT#FM
/* (non-Javadoc) @as"JAN
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) @+atBmt
*/ J|&JD?
public void sort(int[] data) { rvr-XGK36\
MaxHeap h=new MaxHeap(); pABs!A`N
h.init(data); wdUBg*X8
for(int i=0;i h.remove(); -V:"l
System.arraycopy(h.queue,1,data,0,data.length); 2tal
} ^pJ!isuqu
kOh{l: 2-+
private static class MaxHeap{ 5|jw^s7
35tu>^_#V
void init(int[] data){ a{{g<<H
this.queue=new int[data.length+1]; keB&Bjd&
for(int i=0;i queue[++size]=data; UQB"v3Z
fixUp(size); +-E~6^>
} < yC
} LBF 1;zjK
_E@:O+K
private int size=0; nu'M 39{
XS$OyW_Q
private int[] queue; ?B:a|0pf
'Ysx=
public int get() { R'S0 zp6
return queue[1]; 7"8hC
} +[5.WC7J
I4&::y^C
public void remove() { 0{#8',*}m?
SortUtil.swap(queue,1,size--); ezPz<iZ\N
fixDown(1); v%fu
} $V1;la!
file://fixdown K~22\G`
private void fixDown(int k) { d>{nQF;c
int j; qL,tYJ<m%
while ((j = k << 1) <= size) { wC5ee:u C%
if (j < size %26amp;%26amp; queue[j] j++; 1UKg=A-q
if (queue[k]>queue[j]) file://不用交换 F^hBtfz
break; W"Gkq!3u{
SortUtil.swap(queue,j,k); }g4 M2|
k = j; Y[L-7^o@y
} q7"7U=W0
} =2@B&
private void fixUp(int k) { A'2w>8
while (k > 1) { Offu9`DiZ
int j = k >> 1; Me=CSQqf<
if (queue[j]>queue[k]) Br`IW
break; tO0!5#-VR
SortUtil.swap(queue,j,k); [H=)
k = j; W^s ;Bi+Nw
} )n,P"0
} zA[0mkC?$
%rxO_
} J_FNAdQt
up'Tit
} );FJx~b
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SortUtil： +Z85HY{
Ek6MYc8<b~
package org.rut.util.algorithm; 9]e V?yoA8
$ aUo aI
import org.rut.util.algorithm.support.BubbleSort; @'|)~,"bx
import org.rut.util.algorithm.support.HeapSort; |O"lNUW
import org.rut.util.algorithm.support.ImprovedMergeSort; :rg5Kt&
import org.rut.util.algorithm.support.ImprovedQuickSort; 7e<c$t#H
import org.rut.util.algorithm.support.InsertSort; uJ6DO#d`P
import org.rut.util.algorithm.support.MergeSort; Kw#i),M
import org.rut.util.algorithm.support.QuickSort; 7^g&)P
import org.rut.util.algorithm.support.SelectionSort; x:QgjK
import org.rut.util.algorithm.support.ShellSort; 2 aL)
mQY_`&Jq
/** e#E2>Bj;
* @author treeroot lEV]4 t_H
* @since 2006-2-2 kcQ'$<Mz<
* @version 1.0 FXs*vg`
*/ 4n4?4BEn
public class SortUtil { HQB(*
public final static int INSERT = 1; 8H_l:Z[:i
public final static int BUBBLE = 2; D_x+:1(
public final static int SELECTION = 3; 8HP6+c%
public final static int SHELL = 4; 6,9o>zT%H
public final static int QUICK = 5; ~j<+k4I~
public final static int IMPROVED_QUICK = 6; 3"P }n
public final static int MERGE = 7; 5sb\r,kW
public final static int IMPROVED_MERGE = 8; eQ&ZX3*}
public final static int HEAP = 9; Ry|!pV
8KRba4[
public static void sort(int[] data) { f/V 2f].
sort(data, IMPROVED_QUICK); 7P9=)$(EH
} 1Uqu>'
private static String[] name={ L@gWzC~?Q
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" LU9A#
}; ndeebXw*
46 PoM
private static Sort[] impl=new Sort[]{ 0A( +ZMd
new InsertSort(), K#U<ib-v
new BubbleSort(), E>}4$q[r
new SelectionSort(), X_7UJ jFw"
new ShellSort(), 3}/&w\$
new QuickSort(), D#o}cC.
new ImprovedQuickSort(), 2/0v B>
new MergeSort(), n-%s8aaVf
new ImprovedMergeSort(), APO>y
new HeapSort() &0`) Q
}; {>F7CT'G6
^g`&7tX
public static String toString(int algorithm){ +gLPhX:`
return name[algorithm-1]; ? 8LXP
} 4vwTs*eB`
Rb{U+/gq
public static void sort(int[] data, int algorithm) { X#e1KZ
impl[algorithm-1].sort(data); MzL1Bh!M
} Cm\6tD
'CN|'W)g7
public static interface Sort { *;fw%PW
public void sort(int[] data); =|YxDas
} ;]pJj6J&v
D`VM6/iQR
public static void swap(int[] data, int i, int j) { ph-ATJ"
int temp = data; X0n~-m"m
data = data[j]; QI3Nc8t_2
data[j] = temp; 9J?wO9rI
} iURk=*Z=
} Ck!VV2U#