[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; Rxdj}xy
} WWSycH ?[
int i1=l; tQ@7cjq8bA
int i2=mid+1; e (]]
for(int cur=l;cur<=r;cur++){ lL zR5445)
if(i1==mid+1) < }K9 50
data[cur]=temp[i2++]; ]sEuh~F
else if(i2>r) |ru!C(
data[cur]=temp[i1++]; r(Sh
else if(temp[i1] data[cur]=temp[i1++]; eFsl
else T"99m^y
data[cur]=temp[i2++]; Tu-lc)
} @95p[
} J4eU6W+{
6r"NU`1A;r
} QyCrz{/
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改进后的归并排序: NrS+N;i
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package org.rut.util.algorithm.support; tD`^qMua
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import org.rut.util.algorithm.SortUtil; XHv m{z=
}h`z2%5o
/** ;40Z/#FI
* @author treeroot f\5w@nX
* @since 2006-2-2 2<*"@Vj
* @version 1.0 m?wQk:Y1
*/ Q>Ct]JW&
public class ImprovedMergeSort implements SortUtil.Sort { 9]N{8
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private static final int THRESHOLD = 10; wdj?T`4
X.{xHD&_
/* 2XL^A[?
* (non-Javadoc) ^0"^
* `IlhLv
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) uPl7u1c
*/ m>+
public void sort(int[] data) { R@grY:h
int[] temp=new int[data.length]; z~f;}`0
mergeSort(data,temp,0,data.length-1); mNC?kp
} @5&57R3>
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private void mergeSort(int[] data, int[] temp, int l, int r) { 0#GnmH
int i, j, k; b)a5LFt|
int mid = (l + r) / 2; Q.9,W=<6
if (l == r) L+ew/I>:
return; q5Zu'-Cx@
if ((mid - l) >= THRESHOLD) }WJXQ@
mergeSort(data, temp, l, mid); T$mT;k
else N@_y<7#C
insertSort(data, l, mid - l + 1); &LI q?
if ((r - mid) > THRESHOLD) n<|8Onw
mergeSort(data, temp, mid + 1, r); gna!Q
else q=e;P;u
insertSort(data, mid + 1, r - mid); =P,mix|
q2|x$5
for (i = l; i <= mid; i++) { t ^>07#z
temp = data; u gRyUny
} >"UXY)
for (j = 1; j <= r - mid; j++) { -N/n|{+F
temp[r - j + 1] = data[j + mid]; DNj<:Pdd)
} $'}|/D
int a = temp[l]; zEQQ4)mA
int b = temp[r]; xBc$qjV
for (i = l, j = r, k = l; k <= r; k++) { 2.JrLBhN
if (a < b) { %o/@0.w
data[k] = temp[i++]; O.#Rr/+)
a = temp; [Cd#<Te3
} else { RPMz&/k
data[k] = temp[j--]; Xgh%2;:
b = temp[j]; .+Q1h61$T
} D*46,>Tv
} ~{g/
} %;]/Z%!
rc:UG "[
/** zt]8F)l@
* @param data 9'Z{uHi%
* @param l !M}-N
* @param i ?!F<xi:
*/ Z 9cb
private void insertSort(int[] data, int start, int len) { W;yg{y
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); )w}'kih
} *kf%?T.
} ZH=Bm^
} zI"&g]TV5
} (j:[<U
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堆排序： I|bX;l
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package org.rut.util.algorithm.support; .@r{Tq,%q8
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import org.rut.util.algorithm.SortUtil; EQ"_kJ>81Y
rY&lx}
/** 6_8yQ
* @author treeroot N1E9w:T`
* @since 2006-2-2 i< imE#
* @version 1.0 /QlzWson
*/ _Q\rZ l
public class HeapSort implements SortUtil.Sort{ ZQR)k:k7
A$~H`W<yxB
/* (non-Javadoc) i+Ne.h
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) q}'<[Wg
*/ @w%kOX
public void sort(int[] data) { [vBP,_Tjx
MaxHeap h=new MaxHeap(); tOF8v8Hd
h.init(data); kSJ;kz,_
for(int i=0;i h.remove(); ?TDmW8G}J
System.arraycopy(h.queue,1,data,0,data.length); O d6'bO;G
} taVK&ohWx
U/HF6=Wot
private static class MaxHeap{ jA@ uV,w
$rjm MSxi
void init(int[] data){ bQ?Vh@j(M
this.queue=new int[data.length+1]; m-[xrVV
for(int i=0;i queue[++size]=data; 6P9#6mZ
fixUp(size); [$>@f{:
} ),o=~,v:
} \/wk!mWV@
BD.l5~:
private int size=0; BB/c5?V
LEg|R+6E
private int[] queue; &RS)U72
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public int get() { :1UOT'_
return queue[1]; K^/.v<w
} fP;I{AiN~
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public void remove() { (t"|XSF
SortUtil.swap(queue,1,size--); Vw.4;Zy(
fixDown(1); t=fAG,k5
} n68qxD-X
file://fixdown O#^qd0e'P!
private void fixDown(int k) { sV%=z}n=
int j; frQ=BV5%6
while ((j = k << 1) <= size) { EN>a^B+!
if (j < size %26amp;%26amp; queue[j] j++; -G1R><8[
if (queue[k]>queue[j]) file://不用交换 Uu`}| &@i
break; !}eq~3
SortUtil.swap(queue,j,k); M.$=tuUL
k = j; o9{1_7K
} s}^W2
} |c$*Fa"A
private void fixUp(int k) { DM,;W`|6%
while (k > 1) { ~2NTXp
int j = k >> 1; 8M['-
if (queue[j]>queue[k]) !*wd d8
break; :K \IS`
SortUtil.swap(queue,j,k); \u/=?b
k = j; N>j*{]OY+{
} <qoPBm])
} c!$~_?]
Q."rE"}<
} {v3@g[:|
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} wC<FF2T
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SortUtil： zs-,Y@ZL
cnDBT3$~Z
package org.rut.util.algorithm; naY#`xig
v`jFWq8I,
import org.rut.util.algorithm.support.BubbleSort; WK SWOSJ
import org.rut.util.algorithm.support.HeapSort; mL@7,GD
import org.rut.util.algorithm.support.ImprovedMergeSort; 4%>tk 8 [
import org.rut.util.algorithm.support.ImprovedQuickSort; 5B{Eg?
import org.rut.util.algorithm.support.InsertSort; ,+5!1>\
import org.rut.util.algorithm.support.MergeSort; &4p~i Z
import org.rut.util.algorithm.support.QuickSort; ?G5,x
import org.rut.util.algorithm.support.SelectionSort; T< <N U"n
import org.rut.util.algorithm.support.ShellSort; {mHxlG)
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/** !uKuO
* @author treeroot =*WfS^O
* @since 2006-2-2 <U/r U9O
* @version 1.0 rqM_#[Y?
*/ ${UH!n{
public class SortUtil { k~1{|HxrE
public final static int INSERT = 1; )B^T7{
public final static int BUBBLE = 2; K!G/iz9SB
public final static int SELECTION = 3; #/K71Y
public final static int SHELL = 4; xAf?E%_pi
public final static int QUICK = 5; %(1y
public final static int IMPROVED_QUICK = 6; oFu( J
public final static int MERGE = 7; ub{Yg5{3S\
public final static int IMPROVED_MERGE = 8; _lOyT$DN
public final static int HEAP = 9; T,4REbm^
P9#}aw+
public static void sort(int[] data) { < $rXQ
sort(data, IMPROVED_QUICK); J\ ?
} LC/%AbM
private static String[] name={ C:}"?tri
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" .18MMzdN
}; 38RyUHL=
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private static Sort[] impl=new Sort[]{ kPp7;U2A
new InsertSort(), 6)3pnhG9
new BubbleSort(), |=Pw-uk
new SelectionSort(), ^+dL7g?+
new ShellSort(), eG5xJA^
new QuickSort(), Oyjhc<6
new ImprovedQuickSort(), eKqo6P:#f
new MergeSort(), f:A1j\A?
new ImprovedMergeSort(), 5bprhq-7
new HeapSort() k?Iq 6
}; 0~nub
MJ@PAwv"
public static String toString(int algorithm){ rge/qUr/^
return name[algorithm-1]; :LR>U;2
} SDW!9jm>R
@(e/Y/
public static void sort(int[] data, int algorithm) { Jpo(O>\P
impl[algorithm-1].sort(data); b U>.Bp]
} 4"%LgV`
=&?BPhJE
public static interface Sort { ~$ "P\iJ
public void sort(int[] data); ~@VyJT%
} Bjsg!^X7
<#:ey^q<
public static void swap(int[] data, int i, int j) { kCU(Hi`Q
int temp = data; 8}!WJ2[R
data = data[j]; |VML.u:N
data[j] = temp; *Ag,/Cm]
} m2PI^?|e
} (%iCP/E3