[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; ! FNf>z+
} 5x8'K7/4.
int i1=l; Tu]&^[B('
int i2=mid+1; ],8;eq%W)
for(int cur=l;cur<=r;cur++){ `gBD_0<T7
if(i1==mid+1) _QR g7
data[cur]=temp[i2++]; iQt!PMF.
else if(i2>r) b5AGk
data[cur]=temp[i1++]; F:%^&%\
else if(temp[i1] data[cur]=temp[i1++]; I4)Nb WQ
else ?75\>NiR
data[cur]=temp[i2++]; dQ:?<zZ
} K7IyCcdB
} Kb}MF9?:e
C"w,('~@kW
} z!fdx|PUX
$ye^uu;Z
改进后的归并排序: xXF2"+
(NX)oP
package org.rut.util.algorithm.support; ]}Pl%.
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import org.rut.util.algorithm.SortUtil; hwiKOP
HOE2*4r
/** ibvJWg
* @author treeroot {G]?{c)"
* @since 2006-2-2 Qi_&aU$>lM
* @version 1.0 {|s/]W
*/ tNU-2r
public class ImprovedMergeSort implements SortUtil.Sort { y-'" >
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private static final int THRESHOLD = 10; <}d/v_+pnh
sf`PV}a1
/* MRQZIi
* (non-Javadoc) M Hg6PQIB
* \M9h&I\7
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) [*Q-nZ/L
*/ }mKwFVZ
public void sort(int[] data) { Zvxp%dES
int[] temp=new int[data.length]; :/B:FY=
mergeSort(data,temp,0,data.length-1); *ksb?|<Ot
} &.zj5*J
*vYn_wE
private void mergeSort(int[] data, int[] temp, int l, int r) { @%c81rv?
int i, j, k; `\!X}xiWd
int mid = (l + r) / 2; [OzzL\)3l
if (l == r) G*B$%?n
return; GR<c=
if ((mid - l) >= THRESHOLD) c<?[d!vI
mergeSort(data, temp, l, mid); jo)6 %w]
else i3\~Qj;1
insertSort(data, l, mid - l + 1); H)E^!eo
if ((r - mid) > THRESHOLD) IV0[!D
mergeSort(data, temp, mid + 1, r); W<v_2iVu
else 7F9;Su3.
insertSort(data, mid + 1, r - mid); `)$`-Pw*
<s_=-" il
for (i = l; i <= mid; i++) { ?4 qkDtm
temp = data; BEWro|]cM
} l7z6i*R
for (j = 1; j <= r - mid; j++) { atyu/+U'}
temp[r - j + 1] = data[j + mid]; 1Y#HcW&
} SG:bM7*1'
int a = temp[l]; e2c1pgs&+
int b = temp[r]; %*kLEA*v
for (i = l, j = r, k = l; k <= r; k++) { c` , 2h#
if (a < b) { FI8k;4|V
data[k] = temp[i++]; n$4|PO$X
a = temp; <c+K3P'3?
} else { X8b|]Nr
data[k] = temp[j--]; [SkKz>rC
b = temp[j]; qgx?"$ Z
} :6Pnie
} =NZ[${7mq
} D<t~e$H
SauH>
/** dv, C6t2
* @param data {^J!<k,R\;
* @param l ]dG\j^e|
* @param i T1W:>~T5#
*/ b#/i.!:a
private void insertSort(int[] data, int start, int len) { U]1(&MgV
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); ^/dS>_gtHv
} \tx%WC
} 0I5&a
} v0#*X5C1'
} B_k2u
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堆排序： b}@(m$W
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package org.rut.util.algorithm.support; %v{1#~u
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import org.rut.util.algorithm.SortUtil; H-I{-Fm
~zF2`.
/** , ECLqs%
* @author treeroot a }'->H
* @since 2006-2-2 pjwaL^
* @version 1.0 +?[BU<X6u
*/ _6MdF<Xb/
public class HeapSort implements SortUtil.Sort{ B[F-gq-
KzphNHd
/* (non-Javadoc) ``u:lL
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Gr: 3{o`
*/ !8R@@,_v
public void sort(int[] data) { }HRK?.Vj:
MaxHeap h=new MaxHeap(); nWJ:=JQ i"
h.init(data); Tfx :"u
for(int i=0;i h.remove(); 5f^>b\8+ |
System.arraycopy(h.queue,1,data,0,data.length); JYm7@gx
} gsPl _
UXH"si:
private static class MaxHeap{ DG[%Nhle
O'$K],=BS
void init(int[] data){ PB9/m-\H
this.queue=new int[data.length+1]; uP@\#/4u
for(int i=0;i queue[++size]=data; "NzD1k6.L
fixUp(size); }$kQs!#
} `uo,__y
} _Mt Qi
tmJgm5v
private int size=0; c|AtBgvf
WKl+{e
private int[] queue; TWd;EnNM
g=l:cVr8y
public int get() { u6Je@e_!
return queue[1]; &(blN.2
} bMKL1+y(
+ G;LX'B
public void remove() { >&S0#>wmyG
SortUtil.swap(queue,1,size--); ~AZWds(,N
fixDown(1); nfdq y)
} ` ;)ZGY\
file://fixdown o.7{O,v
private void fixDown(int k) { {gsdG-
int j; 0F:1\9f5
while ((j = k << 1) <= size) { fuX'~$b.fA
if (j < size %26amp;%26amp; queue[j] j++; bZ 443SG
if (queue[k]>queue[j]) file://不用交换 T$+-IAE
break; _&#S@aGw
SortUtil.swap(queue,j,k); |Au]1}
k = j; L}sx<=8.m
} g{:<2xI5P
} RJ4. kt
private void fixUp(int k) { '+Xlw
while (k > 1) { l=}~v
int j = k >> 1; IQH[Q9%
if (queue[j]>queue[k]) bb-qO#E
break; g(ogXA1
SortUtil.swap(queue,j,k); v [njdP
k = j; e]Fp=*#
} wJ+Aw
} Ysi g T
-JT/9IQ
} 'h1b1,b~
T=Z.TG|lIx
} XfYC7-e9c
j&R+2%
SortUtil： ArK]0$T
I?Aj.{{$G%
package org.rut.util.algorithm; )C%N]9FvY
kA wNly
import org.rut.util.algorithm.support.BubbleSort; sOU_j:A80;
import org.rut.util.algorithm.support.HeapSort; [I;^^#'P
import org.rut.util.algorithm.support.ImprovedMergeSort; 5W? v'"
import org.rut.util.algorithm.support.ImprovedQuickSort; ,*I@
import org.rut.util.algorithm.support.InsertSort; ++-{]wB3=.
import org.rut.util.algorithm.support.MergeSort; EZDy+6b
import org.rut.util.algorithm.support.QuickSort; S9| a$3K'
import org.rut.util.algorithm.support.SelectionSort; LiQgR 6j
import org.rut.util.algorithm.support.ShellSort; I5m][~6.?
SHVWwoieT
/** ;gg\;i}^
* @author treeroot @A<PkpNL
* @since 2006-2-2 ?sz)J3
* @version 1.0 dt}_D={Be
*/ Zw1U@5}A
public class SortUtil { ^P'{U26
public final static int INSERT = 1; 'x"08v$
public final static int BUBBLE = 2; !h[VUg_8
public final static int SELECTION = 3; &opd2
public final static int SHELL = 4; n(seNp%_
public final static int QUICK = 5; c]-*P7W
public final static int IMPROVED_QUICK = 6; rjx6Djo>
public final static int MERGE = 7; a>O9pX
public final static int IMPROVED_MERGE = 8; J%lgR
public final static int HEAP = 9; )\uO9PB[O
81LNkE,
public static void sort(int[] data) { nC1zzFFJ
sort(data, IMPROVED_QUICK); Y?J"wdWJNB
} /4\wn?f
private static String[] name={ 7R4z}2F2
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" mLV[uhq
}; )0 W`
aUHcYc\u
private static Sort[] impl=new Sort[]{ b75$?_+
new InsertSort(), ?p<.Fv8.
new BubbleSort(), uw(NG.4
new SelectionSort(), &fa5laJb
new ShellSort(), `o]g~AKX
new QuickSort(), #|GSQJ$F)`
new ImprovedQuickSort(), ?S$i?\Qh
new MergeSort(), 39wa|:I
new ImprovedMergeSort(), Vwk#qgnX
new HeapSort() %UUH"
}; 9^FziM
uDw.|B2ui
public static String toString(int algorithm){ yXI >I
return name[algorithm-1]; 'H8(=9O1d
} ",aTWQgN
G;NF5`*4mc
public static void sort(int[] data, int algorithm) { dovZ#D@Q
impl[algorithm-1].sort(data); DGW+>\G
} NA3\
osARA3\Xt
public static interface Sort { tZ`Ts}\e
public void sort(int[] data); c~QS9)=E
} "tjLc6Xl^
Wq*b~Lw
public static void swap(int[] data, int i, int j) { D:^$4}h f
int temp = data; WrPUd{QM
data = data[j]; )^||\G
data[j] = temp; zDhB{3-Q1{
} <fCKUc
} eW5SFY.