[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; x ;~;Ah.p
} 3dz{"hV
int i1=l; =jKu=!QPq
int i2=mid+1; n*ROlCxV
for(int cur=l;cur<=r;cur++){ _u""v
if(i1==mid+1) ,na}' A@a`
data[cur]=temp[i2++]; C=CZtjUt
else if(i2>r) #D#kw*c
data[cur]=temp[i1++]; C?k\5AzT
else if(temp[i1] data[cur]=temp[i1++]; 5VpqDL~d
else =`*@OJHH
data[cur]=temp[i2++]; {Mj- $G"
} KwV!smi2
} Z t4q= Lr
Buso `G
} =E$bZe8
j\wZjc-j
改进后的归并排序: p0y|pD
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package org.rut.util.algorithm.support; sPb}A$'
bHcBjk.\
import org.rut.util.algorithm.SortUtil; 1;KJUf[N
$0x+b!_l@
/** :Jf</uP_
* @author treeroot dGj0;3FI%
* @since 2006-2-2 tK@7t0
* @version 1.0 }D+ b`,
*/ s?s,wdp
public class ImprovedMergeSort implements SortUtil.Sort { w >%^pO~}`
BW6Ox=sr<
private static final int THRESHOLD = 10; 4s~X
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/* q6*i/"mN*
* (non-Javadoc) $UdBZT-
* Tt9cX}&&
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) k q]E@tE*3
*/ j^;P=L0=
public void sort(int[] data) { GqNOWK2O
int[] temp=new int[data.length]; "+4Jmf9
mergeSort(data,temp,0,data.length-1); 00'SceL=`
} ~(^pGL3<
b%*`}B
private void mergeSort(int[] data, int[] temp, int l, int r) { wx`.
int i, j, k; '<vb_8.
int mid = (l + r) / 2; [E%g3>/mt
if (l == r) .I EHjy\+
return; ji>LBbnHdE
if ((mid - l) >= THRESHOLD) rW|%eT*/'A
mergeSort(data, temp, l, mid); {chZ&8)f
else 9BpxbU+L;
insertSort(data, l, mid - l + 1); /F9Dg<#a
if ((r - mid) > THRESHOLD) j!NXNuy:
mergeSort(data, temp, mid + 1, r); @;KYvDY
else <wb6)U.
insertSort(data, mid + 1, r - mid); \2=I//YF
m&b1H9ymd
for (i = l; i <= mid; i++) { h_ccE6]t
temp = data; A`JE(cIz3
} 2LR y/ah
for (j = 1; j <= r - mid; j++) { M9o/6
temp[r - j + 1] = data[j + mid]; oK-d58 sM
} u{va2n/
int a = temp[l]; }apno|W&
int b = temp[r]; k H<C9z2=
for (i = l, j = r, k = l; k <= r; k++) { 9_d#F'#F
if (a < b) { U,p'<rmS
data[k] = temp[i++]; [0105l5
a = temp; ~4Gc~"
} else { jUKMDlH
data[k] = temp[j--]; PYWFz
b = temp[j]; 2HSFMgy
} i$p2am8f
} k!z<=WA
} ]Jm\k'u[
S[q:b .
/** 9d^m 7}2
* @param data J=78p#XUg
* @param l )+'=Zvgej=
* @param i [<{r~YFjWW
*/ rm ;U'&{
private void insertSort(int[] data, int start, int len) { N%>h>HJ
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); =n,1*
} !W8=\:D[
} szhSI
} ||*F.p
} 2L;=wP2?{
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堆排序： Lfcy#3!
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package org.rut.util.algorithm.support; ^X+qut+~
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import org.rut.util.algorithm.SortUtil; *P9"1K+
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/** |a"]@W$>
* @author treeroot mjg@c|rTG
* @since 2006-2-2 yQ[;.<%v
* @version 1.0 9XtO#!+48
*/ G/FDD{y
public class HeapSort implements SortUtil.Sort{ uq-`1m}
CJCxL\
/* (non-Javadoc) `JDZR:bMaT
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ZiQ<SSo:
*/ ?!jJxhK<h
public void sort(int[] data) { YkMFU'?[
MaxHeap h=new MaxHeap(); 0Fon`3(^\
h.init(data); :L+xEL
for(int i=0;i h.remove(); Rc{R^5B
System.arraycopy(h.queue,1,data,0,data.length); a%U#PF6
} 6,jCO@!
(B$>o.(JA
private static class MaxHeap{ Y$"m*0
?B;7J7T
void init(int[] data){ 1U.X[}e
this.queue=new int[data.length+1]; ;92xSe"Ww
for(int i=0;i queue[++size]=data; fap]`P~#L
fixUp(size); M^8zqAA
} F)X`CG ;t
} Hcg7u7M{
S'qT+pP
private int size=0; G1e_pszD{o
/ [49iIzC
private int[] queue; 'dh{q`#0
Ns1n|^9
public int get() { et~D9='E
return queue[1]; ~!2fUewEu
} ;SjNZi)4d
T]z(>{
public void remove() { /;Hqv`X7
SortUtil.swap(queue,1,size--); aXqig&:
fixDown(1); BF2U$-k4
} l4+ `x[^
file://fixdown e21J9e6z
private void fixDown(int k) { '"\n,3h
int j; tbR
while ((j = k << 1) <= size) { ^78N25RU(
if (j < size %26amp;%26amp; queue[j] j++; ;Wy03}K4J
if (queue[k]>queue[j]) file://不用交换 -N^Ah_9ek
break; t7u*j-YE
SortUtil.swap(queue,j,k); J;>~PXB
k = j; ,D }Ka?
} {_*G"A 9
} "&f|<g5
private void fixUp(int k) { \xggIW.^0
while (k > 1) { |;~2y>E
int j = k >> 1; LXxQI(RO
if (queue[j]>queue[k]) p&Qm[!
break; '{.4~:
SortUtil.swap(queue,j,k); 4.wrY6+V
k = j; %5zIh[!1$
} @w.DN)GPo
} L>1y[ Q
wGT>Xh!
} /1{:uh$
)h 6w@TF
} ?.F^Oi6 u
uQn1kI[y
SortUtil： n!~ $Z/
8]vut{
package org.rut.util.algorithm; !LpjTMYs
FGP^rTP)e
import org.rut.util.algorithm.support.BubbleSort; /ivVqOo
import org.rut.util.algorithm.support.HeapSort; Yl'8" \HF
import org.rut.util.algorithm.support.ImprovedMergeSort; Dzu//_u
import org.rut.util.algorithm.support.ImprovedQuickSort; nj;3U^
import org.rut.util.algorithm.support.InsertSort; 'a JE+
import org.rut.util.algorithm.support.MergeSort; c;"e&tW
import org.rut.util.algorithm.support.QuickSort; KFO K%vbM
import org.rut.util.algorithm.support.SelectionSort; <Fx%P:d
import org.rut.util.algorithm.support.ShellSort; $MQ<QP
/{[<J<(8
/** {.e+?V2>_
* @author treeroot '/\*l<
* @since 2006-2-2 '&,p>aM
* @version 1.0 s#a`e]#?
*/ /Ta-3Eh!
public class SortUtil { ~XWBLU<
public final static int INSERT = 1; )SZ#%OE*
public final static int BUBBLE = 2; 2SlL`hN>Z
public final static int SELECTION = 3; G}l9 [lE
public final static int SHELL = 4; l(_|CkcZ
public final static int QUICK = 5; F7b% x7b
public final static int IMPROVED_QUICK = 6; =X5w=(&
public final static int MERGE = 7; >m;nt}f'+
public final static int IMPROVED_MERGE = 8; PknKzrEG:>
public final static int HEAP = 9; 0L32sFy
Uvc$&j^k
public static void sort(int[] data) { t}Td$K7
sort(data, IMPROVED_QUICK); z?Z"*z
} d(^HO~p
private static String[] name={ 6A.%)whI;
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" %vZHHBylu
}; \*{MgwF
Ths~8{dMb
private static Sort[] impl=new Sort[]{ .s4v*bng
new InsertSort(), FXr\
new BubbleSort(), gXs9qY%=
new SelectionSort(), _U4@W+lhX_
new ShellSort(), (gVN<Es
new QuickSort(), O"o|8 l}M/
new ImprovedQuickSort(), j-**\.4a~
new MergeSort(), oidK_mU9q
new ImprovedMergeSort(), n!8W@qhew
new HeapSort() i4k [#x
}; Btzes.
8pr toCB
public static String toString(int algorithm){ 0`WFuFi^o
return name[algorithm-1]; $n!5JS@40
} U" 3L
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public static void sort(int[] data, int algorithm) { Hq<4G:#
impl[algorithm-1].sort(data); mP6}$D
} 5+oY c-
8:S+*J[gSn
public static interface Sort { {t! &x:
public void sort(int[] data); c*zeO@AAn
} 4t%Lo2v!X%
I;wxgWOP
public static void swap(int[] data, int i, int j) { k}nGgd6XD
int temp = data; x_<#28H!
data = data[j]; `~VL&o1>
data[j] = temp; pYAKA1F
} $?z}yx$
} +'93%/: