[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; p_JWklg^
} gk5Gf l
int i1=l; Pn@DHYP
int i2=mid+1; cmCD}Skk
for(int cur=l;cur<=r;cur++){ SG0PQ
if(i1==mid+1) t7V7TL!5'
data[cur]=temp[i2++]; (64es)B}"
else if(i2>r) 6 A#xFPYY{
data[cur]=temp[i1++]; suLC7x`Z
else if(temp[i1] data[cur]=temp[i1++]; lt2MB#
else q*a~9.i@
data[cur]=temp[i2++]; }ksp(.}G
} S^EAE]
} ` ` Yk
{%y|A{}c
} $[7/~I>m
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改进后的归并排序: w?N>3`Jnf
,PJC FQMR
package org.rut.util.algorithm.support; bt.3#aj
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import org.rut.util.algorithm.SortUtil; M ]O4
Q uw|KL
/** G'dN<Nw6
* @author treeroot 5U]@ Y?
* @since 2006-2-2 \>n[x;$
* @version 1.0 zA3r&stN+
*/ C"s-ttP
public class ImprovedMergeSort implements SortUtil.Sort { utC^wA5U~
\\Q){\S
private static final int THRESHOLD = 10; >*!^pbZfX
L8NZU*"
/* tuuwoiQ*`
* (non-Javadoc) -O-?hsV)y
* bH'2iG
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) a+a6P5kJ
*/ /nX_Q?mo
public void sort(int[] data) { l]&x~K}
int[] temp=new int[data.length]; nvNF~)mu
mergeSort(data,temp,0,data.length-1); ^L7!lzyo
} &1`Y&x:p
m@w469&<(q
private void mergeSort(int[] data, int[] temp, int l, int r) { .j**>&7L
int i, j, k; 72*j6#zS
int mid = (l + r) / 2; {{gt>"D,
if (l == r) T-/3 A%v
return; FCKyKn
if ((mid - l) >= THRESHOLD) =20 +(<
mergeSort(data, temp, l, mid); ji.?bKqHE
else EN}XIa>R
insertSort(data, l, mid - l + 1); Ip)u6We>I
if ((r - mid) > THRESHOLD) K~S*<?
mergeSort(data, temp, mid + 1, r); nXI8`7D
else c813NHW
insertSort(data, mid + 1, r - mid); CQrP%}`r
*W>, 98
for (i = l; i <= mid; i++) { Q1|zX@,
temp = data; ;#0$iE
} D.x8=|;
for (j = 1; j <= r - mid; j++) { gNA!)}m\
temp[r - j + 1] = data[j + mid]; unbIfl=
} p0]\QM l1
int a = temp[l]; :)tsz;
int b = temp[r]; UK*v\TMv
for (i = l, j = r, k = l; k <= r; k++) { 4*5e0:O
if (a < b) { WXDo`_{R
data[k] = temp[i++]; `Lavjmfr2V
a = temp; U0{)goN.
} else { %^nNt:N0
data[k] = temp[j--]; \+l_H4\`K
b = temp[j]; qfxEo76'
} L%QRWhB
} &?Q^i">cZ
} 6 v~nEw
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/** `<|<1,
* @param data :eJJL,v
* @param l [/VpvQ'
* @param i B I3fk
*/ @7.7+blS"H
private void insertSort(int[] data, int start, int len) { #M+_Lk3
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); ^3H:I8gRCl
} .]JIo&>5
} T{"Ur:p
} n~}[/ly
} k)X\z@I'
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堆排序： d%epM5
cs9h\]ZA
package org.rut.util.algorithm.support; s8P3H|0.-
hlze]d?z
import org.rut.util.algorithm.SortUtil; bqp^\yu-E
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/** $|3zsi2
* @author treeroot 84WcaH
* @since 2006-2-2 6-)WXJ@V
* @version 1.0 TJZ~Rpq
*/ ]*lZFP~
public class HeapSort implements SortUtil.Sort{ [6_.Y*}N
.P")S|
/* (non-Javadoc) mU?~s7
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) uozq^sy
*/ 7DoU7I\u
public void sort(int[] data) { |0}7/^
MaxHeap h=new MaxHeap(); WVOj;c
h.init(data); %iEdUV\$
for(int i=0;i h.remove(); NqNU:_}
System.arraycopy(h.queue,1,data,0,data.length); ~1twGG_;
} }HmkTk
P3Lsfi.
private static class MaxHeap{ CV\y60n
vTK8t:JQ~
void init(int[] data){ \b8#xT}
this.queue=new int[data.length+1]; V@b7$z
for(int i=0;i queue[++size]=data; H^@Hco>|
fixUp(size); H-v[ShE
} %Q &']
} F'|e:h
?CC.xE
private int size=0; T6=|)UTe1
r=vY-p
private int[] queue; 5$HG#2"Kb#
R9#ar{
public int get() { ~_N,zw{x
return queue[1]; z>,M@@
} ^RT_Lky
Y&U-d{"
public void remove() { Haekr*1%
SortUtil.swap(queue,1,size--); ~_ZK93o(
fixDown(1); ge6S_"
} ?< teHFj
file://fixdown ]sL.+.P
private void fixDown(int k) { k3@d =k
int j; /Wjc\n$'
while ((j = k << 1) <= size) { <2&qIvHL
if (j < size %26amp;%26amp; queue[j] j++; &B[*L+-E
if (queue[k]>queue[j]) file://不用交换 DrV[1Z
break; S#B%[3@
SortUtil.swap(queue,j,k); x$n.\`f0
k = j; izaqEz
} 3HYdb|y
} A%F8w'8(
private void fixUp(int k) { g'7\WQ
while (k > 1) { ly0L)L]\
int j = k >> 1; &oB*gGRw=7
if (queue[j]>queue[k]) xR&:]M[Vg
break; 26nwUNak
SortUtil.swap(queue,j,k); N0kCdJv
k = j; )j~{P
} K{/i2^4
} 8~R.iqLoX
p#]9^oA
} <3@nv%
!-470J
} F1-"yX1B
7z1@XO<D
SortUtil： LmqSxHs0Q
'h'pM#D
package org.rut.util.algorithm; hp(MKfhH
/}>8|#U3y
import org.rut.util.algorithm.support.BubbleSort; 2)|=+DN;
import org.rut.util.algorithm.support.HeapSort; Kb<c||2Nh5
import org.rut.util.algorithm.support.ImprovedMergeSort; ]1d)jWG
import org.rut.util.algorithm.support.ImprovedQuickSort; _BJ:GDz>
import org.rut.util.algorithm.support.InsertSort; A>upT'
import org.rut.util.algorithm.support.MergeSort; XE<5(
import org.rut.util.algorithm.support.QuickSort; kwT)j(pp<
import org.rut.util.algorithm.support.SelectionSort; m[2[9bQ0
import org.rut.util.algorithm.support.ShellSort; *~U.36
JWg.0d$hM
/** fg#e*7Odn
* @author treeroot _rIo @v
* @since 2006-2-2 z[QDJMt>
* @version 1.0 &ZC{ _t
*/ 1R~$m
public class SortUtil { 6O6B8
public final static int INSERT = 1; \:1$E[3v
public final static int BUBBLE = 2; U!o
public final static int SELECTION = 3; f&^}yqmuE
public final static int SHELL = 4; 3MHpP5C
public final static int QUICK = 5; p19(>|$J
public final static int IMPROVED_QUICK = 6; Ew PJ|Z^
public final static int MERGE = 7; <5pNFj}0;X
public final static int IMPROVED_MERGE = 8; Tr:@Dv.O
public final static int HEAP = 9; 3I( n];
EHn!ZrQgh
public static void sort(int[] data) { :6t73\O
sort(data, IMPROVED_QUICK); h;+O96V4.
} >TCit1yD
private static String[] name={ *kK +Nvt8s
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" l9eTghLi
}; .U|'KCM9m
,"#nJC
private static Sort[] impl=new Sort[]{ hf9i%,J
new InsertSort(), )z74,n7-
new BubbleSort(), 4vG-d)"M2
new SelectionSort(), @^YXE,
new ShellSort(), cRr3!<EZ
new QuickSort(), ;r"r1'a+@
new ImprovedQuickSort(), %gFIu.c
new MergeSort(), "'Fvt-<^S7
new ImprovedMergeSort(), IO8 @u;&
new HeapSort() ,~Xe#eM
}; &(,&mE
lg$aRqI29
public static String toString(int algorithm){ qtZzJ>Y
return name[algorithm-1]; M$ieM[_T
} |&MoQxw@
TK' 5NM+4
public static void sort(int[] data, int algorithm) { (VN'1a (
impl[algorithm-1].sort(data); oz{X"jfu
} ~Uv#)
y4p"LD5%^
public static interface Sort { 44P [P{y
public void sort(int[] data); n5A|Zjk;
} M=;csazN
H'YKj'
public static void swap(int[] data, int i, int j) { Zh;}Q(w
int temp = data; t6KKfb
data = data[j]; k}<H
data[j] = temp; l}^ziY!
} =#9#unvE!
} qG 20