[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; 0])[\O`j
} 8}Q2!,9Q
int i1=l; bH%d*
int i2=mid+1; {.Brh"yC
for(int cur=l;cur<=r;cur++){ I:;umyRH
if(i1==mid+1) ?0:=+%.
data[cur]=temp[i2++]; YmHu8H_Q
else if(i2>r) m.lzkS]P
data[cur]=temp[i1++]; "}S6a?]V
else if(temp[i1] data[cur]=temp[i1++]; !';;q
else (yB]$
data[cur]=temp[i2++]; Qn;,OBk
} ghTue*A
} N7^sn!JB
T5dnj&N ]
} 0u +_D8G
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改进后的归并排序: Ian+0 ?`e
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package org.rut.util.algorithm.support; w/9%C(w6
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import org.rut.util.algorithm.SortUtil; c/l^;6O/!\
\4O_@d`A
/** C>QWV[F
* @author treeroot 'k[vcnSz\/
* @since 2006-2-2 ,G[Y< ~Hy
* @version 1.0 a&7uRR26
*/ _ Ewkb
public class ImprovedMergeSort implements SortUtil.Sort { &7r a
b&9~F6aM
private static final int THRESHOLD = 10; StiWa<"c
[n3@*)q's
/* q w@g7
* (non-Javadoc) U&#`5u6'j
* {TDZDH
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 3`Xzp
*/ aYc^ 9*7
public void sort(int[] data) { !.499H3
int[] temp=new int[data.length]; !1Ht{cA0
mergeSort(data,temp,0,data.length-1); wEQZ9?\
} msQ?V&+<
d)d0,fi?-
private void mergeSort(int[] data, int[] temp, int l, int r) { v[)8 1uY
int i, j, k; TYCjVxfu$
int mid = (l + r) / 2; Q(x/&]7=V
if (l == r) ZVrZkd`
return; >Sb3]$$
if ((mid - l) >= THRESHOLD) s@6Jz\<E
mergeSort(data, temp, l, mid); "/%o'Fq
else 2WE01D9O
insertSort(data, l, mid - l + 1); 1*.*\4xo
if ((r - mid) > THRESHOLD) }]=@Y/p
mergeSort(data, temp, mid + 1, r); L-%'jR
else m^w{:\p
insertSort(data, mid + 1, r - mid); w:mm@8N
8Y:x+v5
for (i = l; i <= mid; i++) { }T}xVd0
temp = data; (O&HCT|
} yR"mRy1
for (j = 1; j <= r - mid; j++) { lNTbd"}$:
temp[r - j + 1] = data[j + mid]; 5qFHy[IA
} ZH~Wn#Wp
int a = temp[l]; DcE4r>8B
int b = temp[r]; |7${E^u
for (i = l, j = r, k = l; k <= r; k++) { #aiI]'
if (a < b) { X8wtdd]64
data[k] = temp[i++]; KN>h*eze
a = temp; _hMFmI=r[
} else { /QQjb4S}
data[k] = temp[j--]; RiFUa $
b = temp[j]; T`9nY!
} 6h0}ZM
} %pqB/
} Zay%QNsb
$EzWUt
/** {d.K)8\
* @param data ls~9qkAyLx
* @param l #)3 B
* @param i "2p\/VfA
*/ ~YByyJG
private void insertSort(int[] data, int start, int len) { dnh~An 9
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); Wfy+9"-;s
} ^x_$%8
} E'NS$,h
} 2jxIr-a1G
} }(,{^".[}
h\Q@zR*0a
堆排序： Av4(=}M}@
) $0>L5d:
package org.rut.util.algorithm.support; mu5r4W47
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import org.rut.util.algorithm.SortUtil; |dDKO
ZT8LMPC
/** &9"Y:),
* @author treeroot }6=? zs}
* @since 2006-2-2 t0Jqr)9}6
* @version 1.0 ?Iq{6O>D.
*/ UcH#J &r
public class HeapSort implements SortUtil.Sort{ [ako8
wvxsn!Ao&=
/* (non-Javadoc) {R_ <m$
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 0Ue~dVrM(?
*/ Uv652DC
public void sort(int[] data) { \A)Pcc}7
MaxHeap h=new MaxHeap(); ` U-vXP
h.init(data); m]H]0T
for(int i=0;i h.remove(); `5rfO6;
System.arraycopy(h.queue,1,data,0,data.length); *adznd
} `r-3"or/$
$cU7)vmK`
private static class MaxHeap{ B2|0.G|[j
X{<taD2~
void init(int[] data){ ]Qa|9G,b
this.queue=new int[data.length+1]; WW2hwB(
for(int i=0;i queue[++size]=data; i0J`{PbI
fixUp(size); %wI)uJ2
} ;8^(Z
} u?H.Z
U3`?Z`i(
private int size=0; wNn=JzP
pf%;*
private int[] queue; F^`+.G\
Nwe-7/Q
public int get() { ?%Ww3cU+J
return queue[1]; X8-x$07)
} ?~(#~3x
@|bJMi
public void remove() { mx UyD[|
SortUtil.swap(queue,1,size--); /Ov1eQBNG
fixDown(1); R/kJUl6HEl
} /lh1sHgD
file://fixdown WtaOf_
private void fixDown(int k) { `j!_tE`
int j; y7%SHYC p[
while ((j = k << 1) <= size) { gVI`&W__,
if (j < size %26amp;%26amp; queue[j] j++; %QEyvl4
if (queue[k]>queue[j]) file://不用交换 L]u^$=rI
break; o)]O
SortUtil.swap(queue,j,k); B2'TRXIm1U
k = j; l2}X\N&q
} |\/\FK]?]
} =8%*Rrj^
private void fixUp(int k) { 1N:~5S}s>
while (k > 1) { i]L=M 5^C
int j = k >> 1; rHk,OC
if (queue[j]>queue[k]) WiZTE(NM`
break; .l5-i@=W
SortUtil.swap(queue,j,k); . UH'U\M
k = j; 4>a(!ht
} "tK|/R+
} ;R Jv7@
qxsHhyB_n;
} I|qhj*_C
oveK;\7/m
} 9q 2 vT^
6EO@Xf7,
SortUtil： VX>j2Z'
5Pxx)F9]
package org.rut.util.algorithm; .Eb]}8/}E
~PpDrJ; Va
import org.rut.util.algorithm.support.BubbleSort; :K"~PrHm
import org.rut.util.algorithm.support.HeapSort; ~fb#/%SV
import org.rut.util.algorithm.support.ImprovedMergeSort; ZoSyc--Bv
import org.rut.util.algorithm.support.ImprovedQuickSort; BV }CmU&DA
import org.rut.util.algorithm.support.InsertSort; YOj&1ymBZ
import org.rut.util.algorithm.support.MergeSort; ~!Nw]lb!
import org.rut.util.algorithm.support.QuickSort; 2|d^#8)ZC
import org.rut.util.algorithm.support.SelectionSort; >cg)NqD
import org.rut.util.algorithm.support.ShellSort; nk7>iK!i
9V[}#(f$
/** gIusp917
* @author treeroot 0@{0#W3R
* @since 2006-2-2 4>LaA7)v
* @version 1.0 q=D8 Nz
*/ &;)B qqXc
public class SortUtil { K~I?i/P=z
public final static int INSERT = 1; dr+(C[=
public final static int BUBBLE = 2; nE*S3
public final static int SELECTION = 3; p<#aXsjy
public final static int SHELL = 4; LExm#T`
public final static int QUICK = 5; !{+.)%d'g
public final static int IMPROVED_QUICK = 6; '`.-75T
public final static int MERGE = 7; ,\cV,$
public final static int IMPROVED_MERGE = 8; i$Kx@,O8t
public final static int HEAP = 9; /3K)$Er
O9/)_:Wdh
public static void sort(int[] data) { .{*l,
sort(data, IMPROVED_QUICK); M\
} -!\%##r7~
private static String[] name={ P=KhR&gwV~
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" x<Gjr}
}; 8ih_S2Cd
D7JrGaF{
private static Sort[] impl=new Sort[]{ $u'"C|>8
new InsertSort(), ;UM(y@
new BubbleSort(), S50}]5K
new SelectionSort(), VltM{-k^
new ShellSort(), 6)ln,{
new QuickSort(), ~:o$}`mW
new ImprovedQuickSort(), 'SoBB:
new MergeSort(), 5`+9<8V
new ImprovedMergeSort(), >1;jBx>Qy%
new HeapSort() .UQ|k,,t
}; (dD7"zQ
.%e>>U>F
public static String toString(int algorithm){ ~<9e}J
return name[algorithm-1]; J -Lynvqm
} kp*!
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public static void sort(int[] data, int algorithm) { SA&(%f1d
impl[algorithm-1].sort(data); naH(lz|v
} =_zo
8.N`^Nj 1
public static interface Sort { _ahp7-O
public void sort(int[] data); v[{7\Hha
} -3v\ c~
O6)Po
public static void swap(int[] data, int i, int j) { .ml\z5
int temp = data; KsE$^`
data = data[j]; zow8 Q6f
data[j] = temp; V|kN 1 A
} &]RE 5!
} X' 5R4j