[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; D(cD8fn,J
} p l)":}/)
int i1=l; 1-RY5R}VR
int i2=mid+1; mq:k|w^6
for(int cur=l;cur<=r;cur++){ IrwQ~z3I
if(i1==mid+1) y@LImiRG
data[cur]=temp[i2++]; J%|?[{rO{'
else if(i2>r) U}2@
data[cur]=temp[i1++]; 7T[~~V^x
else if(temp[i1] data[cur]=temp[i1++]; 0Q3U\cDr
else PA2}4`
data[cur]=temp[i2++]; I2}W/}
} 0AZ9I!&i
} wG3L+[,
w,~*ead
} 7j& t{q5
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改进后的归并排序: = XZU9df
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package org.rut.util.algorithm.support; OjU{r N*
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import org.rut.util.algorithm.SortUtil; DR"Y(-xl
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/** }2 S.
* @author treeroot HG]ARgOB
* @since 2006-2-2 FlO?E3d
* @version 1.0 h*%p%t<
*/ g 2Fg
public class ImprovedMergeSort implements SortUtil.Sort { s5,@=(,
HOW<IZ^
private static final int THRESHOLD = 10; BD6!,
H`[FC|RYyE
/* YSjc=
* (non-Javadoc) {R$`YWk
* +h)"m/mE
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) LpHGt]|D
*/ L K&c~ Uy
public void sort(int[] data) { j/v>,MM
int[] temp=new int[data.length]; P0N/bp2Uy
mergeSort(data,temp,0,data.length-1); /Qgb t
} Z;+,hR((
&+9 ;
private void mergeSort(int[] data, int[] temp, int l, int r) { xvGYd,dlK
int i, j, k; z/Lb1ND8
int mid = (l + r) / 2; 88Pt"[{1
if (l == r) hV3]1E21"
return; ]4rmQAS7"
if ((mid - l) >= THRESHOLD) g4W$MI
mergeSort(data, temp, l, mid); vc#o(?g
else b[vE!lJEq
insertSort(data, l, mid - l + 1); Rtf<UhUn
if ((r - mid) > THRESHOLD) u5CSx'h]
mergeSort(data, temp, mid + 1, r); I0-1Hr
else Kq7r+A
insertSort(data, mid + 1, r - mid); <I,4Kc!
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for (i = l; i <= mid; i++) { ~B<\#oO
temp = data; eDd&vf
} #y\O+\4e
for (j = 1; j <= r - mid; j++) { &Vj@){
temp[r - j + 1] = data[j + mid]; $.,PteYK
} j;$f[@0o
int a = temp[l]; ,~L*N*ML
int b = temp[r]; YB*)&@yx
for (i = l, j = r, k = l; k <= r; k++) { 5{H)r
if (a < b) { wXNng(M7
data[k] = temp[i++]; )St0}?I~
a = temp; ]H`wE_2tu
} else { `(W"wC
data[k] = temp[j--]; F"Dr(V
b = temp[j]; 8%4;'[UV
} Y58H.P
} 5%'ybh)@
} 74_?@Z(
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/** '{`KYKLP+
* @param data j)ic7b
* @param l besc7!S
* @param i s:<y\1Ay
*/ jLFaf#G]
private void insertSort(int[] data, int start, int len) { ;&lXgC^*
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); (~|)Gmq2
} lU 9o"2
} \^1^|a"
} nS#F*)
} oy[s])Tg
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堆排序： +5fB?0D;
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package org.rut.util.algorithm.support; /{R ^J#
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import org.rut.util.algorithm.SortUtil; q~>!_q]FE
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/** f}dlQkZ(
* @author treeroot l_yy;e
* @since 2006-2-2 F,YPIl
* @version 1.0 Iq|h1ie m+
*/ HX.K{!5
public class HeapSort implements SortUtil.Sort{ Cq@7oi]W0
%>&~?zrq
/* (non-Javadoc) S5|7D[*
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) :F d1k Jm
*/ TT/=0^"
public void sort(int[] data) { 5REH`-
MaxHeap h=new MaxHeap(); "'BDVxp'w
h.init(data); r6j[C"@
for(int i=0;i h.remove(); ,WdSJ BK'a
System.arraycopy(h.queue,1,data,0,data.length); +s}!+I8P
} D[W` q#W
JKKp5~_~
private static class MaxHeap{ \Vv)(/q{
H:b"Vd"x9
void init(int[] data){ M_O$]^I3w
this.queue=new int[data.length+1]; 3SM'vV0[
for(int i=0;i queue[++size]=data; f*@ :,4@
fixUp(size); qX&+
} .0nT*LF
} `LH9@Z{
aT/2rMKPF
private int size=0; BTsvL>Wy
xb7!!PR
private int[] queue; 8V(~u^!%_
M5[#YG'FlQ
public int get() { "eoPG#]&
return queue[1]; 0MT?}D&TL
} ,%Pn.E* r;
*7*_QW%?A
public void remove() { T7YJC,^m
SortUtil.swap(queue,1,size--); :Gz$(!j1.'
fixDown(1); h-.^*=]R6
} uA`e
file://fixdown vkLt#yj~
private void fixDown(int k) { W)`>'X`
int j; EQnU:a
while ((j = k << 1) <= size) { Ym%#"
if (j < size %26amp;%26amp; queue[j] j++; 6n:X p_yO
if (queue[k]>queue[j]) file://不用交换 )1 @v<I
break; $_%
SortUtil.swap(queue,j,k); n2aUj(Zs=
k = j; y2k's
} DvN_}h^nX
} &2@"zD
private void fixUp(int k) { zt((TD2
while (k > 1) { c[1{>z{G
int j = k >> 1; jKP75jm
if (queue[j]>queue[k]) qZQm*q(jM
break; B'Nvl#
SortUtil.swap(queue,j,k); FpttH?^
k = j; 6 y"r'
} h*4wi.-
} "% i1zQo&
$sL+k 'dY
} 3b?-83a
>$<Q:o}^
} -8:O?]+Q/
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SortUtil： NVVAh5R
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package org.rut.util.algorithm; : Q,O:
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import org.rut.util.algorithm.support.BubbleSort; yl<=_Q
import org.rut.util.algorithm.support.HeapSort; 9<Zm}PE32
import org.rut.util.algorithm.support.ImprovedMergeSort; VQ~eg wJL
import org.rut.util.algorithm.support.ImprovedQuickSort; R]kH$0`
import org.rut.util.algorithm.support.InsertSort; oW7;t
import org.rut.util.algorithm.support.MergeSort; 5W{|?l{
import org.rut.util.algorithm.support.QuickSort; s5b<KQ.
import org.rut.util.algorithm.support.SelectionSort; !/F-EJOH6C
import org.rut.util.algorithm.support.ShellSort; b9f5
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/** oOQan
* @author treeroot _qit$#wK;
* @since 2006-2-2 { F0"U=
* @version 1.0 <^Q` y
*/ EU5(s*A
public class SortUtil { +SRM?av
public final static int INSERT = 1; rI:]''PR
public final static int BUBBLE = 2; F7p`zf@O]
public final static int SELECTION = 3; X bV?=
public final static int SHELL = 4; (_q&QI0{
public final static int QUICK = 5; d{^K8T3
public final static int IMPROVED_QUICK = 6; ZDrTPnA[
public final static int MERGE = 7; *!EHs04
public final static int IMPROVED_MERGE = 8; H]lD*3b
public final static int HEAP = 9; .b%mr:nEt7
]sI{+$~:c
public static void sort(int[] data) { |qk%UN<
sort(data, IMPROVED_QUICK); 51%<N\>/4
} D@mqfi(x
private static String[] name={ t/"9LMKs?
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" ,g)9ZP.F
}; w68VOymD/
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private static Sort[] impl=new Sort[]{ RML'C:1
new InsertSort(), atFu KYI
new BubbleSort(), FLlL0Gu
new SelectionSort(), I8hmn@ce
new ShellSort(), *u<@_Oa
new QuickSort(), qr/N?,
new ImprovedQuickSort(), \AR3DDm
new MergeSort(), 6dCqS
new ImprovedMergeSort(), iu,Bmf^oD
new HeapSort() 6? (8KsaN
}; HLt;1:b
E}w<-]8
public static String toString(int algorithm){ PI")^`
return name[algorithm-1]; j%&^qD,
} iQaFR@
f1VA61z{)
public static void sort(int[] data, int algorithm) { 20uR?/|@
impl[algorithm-1].sort(data); X/wqfP
} }Sb&ux
|}roR{gc|
public static interface Sort { jdDcmR
public void sort(int[] data); =HvLuVc
} F9SIC7}uH
j#XU\G
public static void swap(int[] data, int i, int j) { (aH_K07
int temp = data; lO|H:7
data = data[j]; Q ?W6
data[j] = temp; &-Zg0T&tZ
} DU4Prjb'
} T1b9Zqc)f