[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; ~qW"v^<
} MB5X$5it
int i1=l; sr.!EQ]
int i2=mid+1; Eid~4a
for(int cur=l;cur<=r;cur++){ >3ASrM+>w
if(i1==mid+1) A%#."2vq~
data[cur]=temp[i2++]; h3-dJgb
else if(i2>r) s[/)v:
data[cur]=temp[i1++]; Su`] ku'
else if(temp[i1] data[cur]=temp[i1++]; Fc"+L+h@W
else O6!:Qd
data[cur]=temp[i2++]; m3b?f B
} 1b"3]?
} }l@7t&T|
3n TpL#
} =hKu85
g>Kh?(
改进后的归并排序: 5NYYrA8,^
cA B^]j
package org.rut.util.algorithm.support; `>$l2,
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import org.rut.util.algorithm.SortUtil; (<5&<JC{
0bMbM^xV6
/** Bdf]?s[]
* @author treeroot o,y{fv:ki
* @since 2006-2-2 /\uW[mt
* @version 1.0 BO=j*.YKy
*/ :sb+jk
public class ImprovedMergeSort implements SortUtil.Sort { u!VY6y7p
;hU~nj+{
private static final int THRESHOLD = 10; Z|Xv_Xo|4
`lq[6[n
/* ,HO@bCK
* (non-Javadoc) vn=0=(
* <3aW3i/jTc
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) X1~ B
*/ a{8g9a4
public void sort(int[] data) { {nmBIk2v
int[] temp=new int[data.length]; x\XOtjJr
mergeSort(data,temp,0,data.length-1); lF1ieg"i M
} 0f|nI8,z
,n+~S^r
private void mergeSort(int[] data, int[] temp, int l, int r) { ,1-#Z"~c
int i, j, k; SSI('6Z/
int mid = (l + r) / 2; B6a
if (l == r) ,!g%`@u
return; 2JRX ;s~
if ((mid - l) >= THRESHOLD) mMV-IL
mergeSort(data, temp, l, mid); Q|J$R
else GGwHz]1L
insertSort(data, l, mid - l + 1); _:,U$W
if ((r - mid) > THRESHOLD) H;eOrX{GT
mergeSort(data, temp, mid + 1, r); f0lK,U@P
else ns[Q %_
insertSort(data, mid + 1, r - mid); W_N!f=HW
4wQ>HrS)(
for (i = l; i <= mid; i++) { T$;N8x[
temp = data; ~w9ZSSb4
} 'gwh:8Xc
for (j = 1; j <= r - mid; j++) { |G]M"3^
temp[r - j + 1] = data[j + mid]; s;-%Dfn
} \?.Tq24
int a = temp[l]; /WKp\r(Hp
int b = temp[r]; ~,.}@XlgT.
for (i = l, j = r, k = l; k <= r; k++) { VN9C@ ;'$
if (a < b) { /SZg34%
data[k] = temp[i++]; 86\B|!
a = temp; Arb-,[kwN
} else { A `n:q;my
data[k] = temp[j--]; kUG3_ *1 .
b = temp[j]; .!hB tR
} /?P="j#u
} YV0K&d
} bfjtNF*^
wsNM'~(
/** Mw+8p}E
* @param data *6e 5T
* @param l .)eX(2j\
* @param i LAwAFma>
*/ %@d~)f
private void insertSort(int[] data, int start, int len) { Pa!r*(M)C
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); K+_$ WT_
} \hwz;V.J"
} 7EAkY`Op
} ;ywQk| r
} GM<r{6Qy
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堆排序： &N!;d E
wN ![SM/+
package org.rut.util.algorithm.support; bJE$>
M6b; DQ
import org.rut.util.algorithm.SortUtil; Wg+fT{[f|
a~F`{(Q2
/** t~0}Emgp<(
* @author treeroot jreY'y:
* @since 2006-2-2 e/<Og\}P/
* @version 1.0 ~^Y(f'{
*/ `)W}4itm
public class HeapSort implements SortUtil.Sort{ {s=$.Kg
Rg6e7JVu
/* (non-Javadoc) 'nM)=
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) M/,jHG8v
*/ &<P!o_+eb
public void sort(int[] data) { ?*Kewj
MaxHeap h=new MaxHeap(); 0#mu[O
h.init(data); &\0`\#R
for(int i=0;i h.remove(); u&>o1!c*P
System.arraycopy(h.queue,1,data,0,data.length); huau(s0um
} {AY`\G
e>kw>%3bl9
private static class MaxHeap{ `"E|
F_$K+6
void init(int[] data){ v?7.)2XcX
this.queue=new int[data.length+1]; (Js'(tBhiU
for(int i=0;i queue[++size]=data; >_y>["u6J#
fixUp(size); 7='M&Za
} U9KnW]O%"
} ;Vad| -
K6.*)7$#
private int size=0; "(+>#
m*BtD-{
private int[] queue; K/y#hP
'~E&^K5hr
public int get() { 5UwaBPj4
return queue[1]; By8C-jD
} ^L;`F
(,E.1j]ji
public void remove() { LV&tu7c
SortUtil.swap(queue,1,size--); ^6~CA
fixDown(1); #GYCU!
} r)dT,X[}F
file://fixdown wK[xLf
private void fixDown(int k) { [;D4,@A
int j; !5}Ibb
while ((j = k << 1) <= size) { i>S /W!F
if (j < size %26amp;%26amp; queue[j] j++; :/9@p
if (queue[k]>queue[j]) file://不用交换 mb*L'y2r
break; J}coWjw`q
SortUtil.swap(queue,j,k); <8Qa"<4f;
k = j; MdWT[
} 0j1I
} hIw<gb4J%
private void fixUp(int k) { qPpC)6-Q
while (k > 1) { j0k"iv
int j = k >> 1; >Z?3dM~[
if (queue[j]>queue[k]) AO9F.A<T5
break; ;fhFv&`mE
SortUtil.swap(queue,j,k); *N$#cz
k = j; tLpDIA_8
} 4 ~17s`+
} ejwFQ'wTx
67Ai.3dR
} m?_S&/+*
h]<Ld9
} ;b$(T5
aIk%$Mat
SortUtil： & h9ji[
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package org.rut.util.algorithm; -\j}le6;c
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import org.rut.util.algorithm.support.BubbleSort; 0 )#5_-%
import org.rut.util.algorithm.support.HeapSort; itM6S$
import org.rut.util.algorithm.support.ImprovedMergeSort; [t /hjm"$
import org.rut.util.algorithm.support.ImprovedQuickSort; g[j"]~
import org.rut.util.algorithm.support.InsertSort; <Ja>
import org.rut.util.algorithm.support.MergeSort; ,k/*f+t
import org.rut.util.algorithm.support.QuickSort; +GWeu0b(~
import org.rut.util.algorithm.support.SelectionSort; -lyT8qZ:(
import org.rut.util.algorithm.support.ShellSort; 4.7ePbk[E
S"w$#"EJA
/** Warz"n]iC
* @author treeroot RaAi9b[/S
* @since 2006-2-2 U]fE(mpI9
* @version 1.0 UGEC_
*/ J;+iW*E:
public class SortUtil { L '342(
public final static int INSERT = 1; 3a_S-&?X
public final static int BUBBLE = 2; {3C~cK{
public final static int SELECTION = 3; bzmT.!
public final static int SHELL = 4; Fy<dk}@
public final static int QUICK = 5; koC2bX
public final static int IMPROVED_QUICK = 6; ~xu<xy@E
public final static int MERGE = 7; 5 %q26&
public final static int IMPROVED_MERGE = 8; w1aa5-aF
public final static int HEAP = 9; cp2e,%o
}(dhXOf\q
public static void sort(int[] data) { Fp-d69Npo
sort(data, IMPROVED_QUICK); #P-S.b
} W z3y+I/&
private static String[] name={ 'uBW1,
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" L!DP*XDp
}; G6Z2[Ej1
4_`+&
private static Sort[] impl=new Sort[]{ .-[UHO05^8
new InsertSort(), *:3flJt
new BubbleSort(), `Bnp/9q5
new SelectionSort(), ooByGQ90V:
new ShellSort(), )=;0
new QuickSort(), on+ c*#
new ImprovedQuickSort(), BULX*eOt
new MergeSort(), ^!1mChf
new ImprovedMergeSort(), j|KZ HH%dc
new HeapSort() $ W(m
}; gec<5Ewg
zMKW@
public static String toString(int algorithm){ ju(&v*KA
return name[algorithm-1]; p}!rPd*
} Dq Kk9s;6_
f5Zx:g
public static void sort(int[] data, int algorithm) { z![RC59S
impl[algorithm-1].sort(data); sn/^#Aa=N
} ~DVAk|fc
g%#" 5Kr
public static interface Sort { >tqLwC."'
public void sort(int[] data); 2IqsBK`
} w:Tz&$&Y$
WtFv"$V
public static void swap(int[] data, int i, int j) { $Dd IY}
int temp = data; s<xD$K~rM
data = data[j]; Wj/.rG&tE
data[j] = temp; $k V^[
} KDuM;
} ykxjT@[