[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; Ha=_u+@
} d Y:|Ef|v(
int i1=l; y} $P,
int i2=mid+1; KTLbqSS\
for(int cur=l;cur<=r;cur++){ l?o-!M{
if(i1==mid+1) 6=G~6Qu
data[cur]=temp[i2++]; ^8';8+$
else if(i2>r) Bg 7j5
data[cur]=temp[i1++]; QX/X {h6
else if(temp[i1] data[cur]=temp[i1++]; *%OYAsc
else Hyq@O8
data[cur]=temp[i2++]; 't0+:o">:
} LL= Z$U $
} ?u_gXz;A
#K:-Bys5v
} $S6HZG:N
}XGMa?WR
改进后的归并排序: Z{,GZT
cQ3W;F8|n
package org.rut.util.algorithm.support; 0|fb< "
n) _dH/"
import org.rut.util.algorithm.SortUtil; ;t;Y.*&=S
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/** @pF fpHq?>
* @author treeroot 5|<yfk8*J
* @since 2006-2-2 M#\ <
* @version 1.0 E[|s>Xv~
*/ %]a @A8o0
public class ImprovedMergeSort implements SortUtil.Sort { k#axt Sc
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private static final int THRESHOLD = 10; 93W
.N~PHyXZR
/* .>mH]/]m
* (non-Javadoc) ]>R`;"(
* JmU<y
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) g.B%#bfg
*/ j4~7akG
public void sort(int[] data) { X q}Ucpj
int[] temp=new int[data.length]; HE#,(;1i
mergeSort(data,temp,0,data.length-1); 7BL|x
} Q00R<hu@F
S=0"f}Jo.
private void mergeSort(int[] data, int[] temp, int l, int r) { 7|&e[@B
int i, j, k; X,C*qw@
int mid = (l + r) / 2; B :.@Qi^
if (l == r) GXDC@+$14
return; mu6039qy
if ((mid - l) >= THRESHOLD) s<[A0=LH
mergeSort(data, temp, l, mid); ,O:EX0
else :a_BD
insertSort(data, l, mid - l + 1); ?z2jk
if ((r - mid) > THRESHOLD) ?QCmSK=L
mergeSort(data, temp, mid + 1, r); w)+wj[6 E
else tigT@!`$Y
insertSort(data, mid + 1, r - mid); J>rka]*
9R9__w;
for (i = l; i <= mid; i++) { Y3#Nux%
temp = data; f~w>v
} wP[xmO-%
for (j = 1; j <= r - mid; j++) { NH7`5mF$
temp[r - j + 1] = data[j + mid]; A/q2g7My
} ifXW
int a = temp[l]; $4Z+F#mx
int b = temp[r]; di~]HUZh)
for (i = l, j = r, k = l; k <= r; k++) { j|:dYt`WM
if (a < b) { IByf_E;r
data[k] = temp[i++]; _fcS>/<a
a = temp; "-w^D!C
} else { x^A7'ad0
data[k] = temp[j--]; ""co6qo#>
b = temp[j]; 1HMUHZT
} >\V6+$cNp
} ]UDd :2yt
} o^3FL||P#r
>(X#<`
/** H2_/,n
* @param data rwiw Rh
* @param l `E@kFJ(<On
* @param i =M7TCE
*/ EXuLSzQwv
private void insertSort(int[] data, int start, int len) { MkwU<ae AB
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); lC0~c=?J
} Q"40#RFA
} O~V1Ywfq7^
} A (Bk@;
} > 2#%$lX6
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堆排序： Yc^%zxub
?hnx/z+uT
package org.rut.util.algorithm.support; !O|ql6^;
ebqg"tPN{
import org.rut.util.algorithm.SortUtil; X0`j-*,FX
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/** lsk_P&M
* @author treeroot +R!zs
* @since 2006-2-2 axmsrjW#
* @version 1.0 7paUpQit
*/ EIr@g
public class HeapSort implements SortUtil.Sort{ _a](V6
@Mm/C?#*O
/* (non-Javadoc) jpRBER_X
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) *i^`Dw^~y
*/ h4_b!E@
public void sort(int[] data) { [)^mBVht
MaxHeap h=new MaxHeap(); GF8 -_X
h.init(data); we3tx{j
for(int i=0;i h.remove(); hq=,Z1J
System.arraycopy(h.queue,1,data,0,data.length); #ly@;!M
} OF[?Z
mzWP8Hlw
private static class MaxHeap{ l _+6=u
OsQkA2=
void init(int[] data){ #uSK#>H_!
this.queue=new int[data.length+1]; .wmnnvtl,
for(int i=0;i queue[++size]=data; wd[eJcQ,
fixUp(size); ad9CsvW
} ks*Y9D*=
} q*,Q5
u)a'
private int size=0; ,>n% ~'gb
5Fmav5
private int[] queue; >c4/?YV
v?%LQKO
public int get() { ]IZ>2!6r
return queue[1]; ?s?$d&h
} =7%oE[
V|'1tB=;*1
public void remove() { w&Y{1rF>
SortUtil.swap(queue,1,size--); .63=(o
fixDown(1); E V2 )
} @5.e@]>ZM
file://fixdown MPIlSMe
private void fixDown(int k) { X8i(~ B
int j; ySe$4deJ
while ((j = k << 1) <= size) { ]N^*tO
if (j < size %26amp;%26amp; queue[j] j++; YuQ~AE'i
if (queue[k]>queue[j]) file://不用交换 7G<t"'
break; y+9h~,:A
SortUtil.swap(queue,j,k); w\Mnu}<e$
k = j; ;#1Iiuh
} WkP +r9rT
} \}5p0.=
private void fixUp(int k) { 1D F/6y
while (k > 1) { {^}0 G^
int j = k >> 1; "0CjP+1k
if (queue[j]>queue[k]) ?<U{{C
break; @*>Sw>oet
SortUtil.swap(queue,j,k); G_ >G'2
k = j; c)}2K0
} #aar9
} AVl~{k|
l>6@:nq|R
} Pm+tQ
kM/Te{<
} EpYy3^5d
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SortUtil： x;LzG t:w
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package org.rut.util.algorithm; At6qtoPRA
1[;;sSp
import org.rut.util.algorithm.support.BubbleSort; qQ0C?
import org.rut.util.algorithm.support.HeapSort; uuNR?1fS
import org.rut.util.algorithm.support.ImprovedMergeSort; ua5?(,E`']
import org.rut.util.algorithm.support.ImprovedQuickSort; w%y\dIeI'
import org.rut.util.algorithm.support.InsertSort; ?F7o!B
import org.rut.util.algorithm.support.MergeSort; C/=XuKE-t
import org.rut.util.algorithm.support.QuickSort; +GF#?X0^
import org.rut.util.algorithm.support.SelectionSort; 'zZcn" +!
import org.rut.util.algorithm.support.ShellSort; 71fk.16
mee$"Y
/** l|/LQ/
* @author treeroot -nbMTY}
* @since 2006-2-2 5fJ[}~
* @version 1.0 4)6xU4eBaL
*/ _[K"gu
public class SortUtil { DgHaOAdU
public final static int INSERT = 1; 3;[DJ5
public final static int BUBBLE = 2; A"v{~
public final static int SELECTION = 3; MZ>6o5K|
public final static int SHELL = 4; FLZWZ;
public final static int QUICK = 5; S4CbyXW
public final static int IMPROVED_QUICK = 6; ln!'_\{
public final static int MERGE = 7; (ljF{)Ml+=
public final static int IMPROVED_MERGE = 8; ])DX%$f
public final static int HEAP = 9; CO:u1?
2@=IT0[E\
public static void sort(int[] data) { q.#[TI ^
sort(data, IMPROVED_QUICK); ccFn.($p?,
} .w?(NZ2~
private static String[] name={ 69K{+|
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" dXHB#
}; .7NNT18
o Y}]UB>
private static Sort[] impl=new Sort[]{ !7bw5H
new InsertSort(), ~EzaC?fQ
new BubbleSort(), GoM ip8'u
new SelectionSort(), !y:%0{l
new ShellSort(), <A5]]{9 +
new QuickSort(), |RkcDrB~
new ImprovedQuickSort(), Q/ms]Du
new MergeSort(), N6OMYP1
new ImprovedMergeSort(), /93l74.w
new HeapSort() wC_l@7t
}; &MZ$j46
nlYR-.
public static String toString(int algorithm){ +!IQj0&'Y3
return name[algorithm-1]; @Ky> 9m{
} '*^yAlgtt
l_'[27
public static void sort(int[] data, int algorithm) { N==ZtKj F
impl[algorithm-1].sort(data); /cr}N%HZB
} Ys+OB*8AE
H5CR'Rp
public static interface Sort { $?G"GQ!.
public void sort(int[] data); g>rp@M
} l%ayI
$rF=_D6
public static void swap(int[] data, int i, int j) { eN?Y7
int temp = data; TL$EV>Nr
data = data[j]; 7hW+T7u?
data[j] = temp; ._w8J"E5
} J_;N:7'p
} w%AcG~`j!B