[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; xMjhC;i{
} m!FuC=e
int i1=l; RE>Q5#|c
int i2=mid+1; !85bpQ.
for(int cur=l;cur<=r;cur++){ b Hr^_ogN
if(i1==mid+1) IuXgxR%
data[cur]=temp[i2++]; cp`Jep<T
else if(i2>r) *yhA8fJ
data[cur]=temp[i1++]; dn 6]qW5
else if(temp[i1] data[cur]=temp[i1++]; g *Js4
else Cbff:IP
data[cur]=temp[i2++]; 5#.m'a)
} Jt8;ddz
} t2dsYU/
sX1DbEjj[o
} }4C_r'd6
1-y8Hy_a2
改进后的归并排序: <=.6Z*x+
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package org.rut.util.algorithm.support; \?n6l7*t>
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import org.rut.util.algorithm.SortUtil; *Jsb~wta
XDPR$u8hM
/** ,Cr%2Wg-
* @author treeroot &>jz[3
* @since 2006-2-2 >Scyc-n
* @version 1.0 0AO^d[v
*/ /8l-@P.o
public class ImprovedMergeSort implements SortUtil.Sort { ^Q8yb*MN
UR'[?
private static final int THRESHOLD = 10; `%Ih'(ne
Lf9hOMHx
/* Ey=2zo^F
* (non-Javadoc) f;'*((
* x=DxD&I!J
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Bp^LLH
*/ : @|Rj_S;
public void sort(int[] data) { vMz|'-rm$
int[] temp=new int[data.length]; FyEKqYl
mergeSort(data,temp,0,data.length-1); 1/-3m Po
} %0Ur3
-}6ew@GE
private void mergeSort(int[] data, int[] temp, int l, int r) { IW\^-LI.
int i, j, k; _[6sr7H!
int mid = (l + r) / 2; @aS)=|Ls\
if (l == r) 0F)v9EK(W4
return; PysDDU}v
if ((mid - l) >= THRESHOLD) yQhO-jT
mergeSort(data, temp, l, mid); $ar^U
else m,HE4`g
insertSort(data, l, mid - l + 1); ai<qK3!O
if ((r - mid) > THRESHOLD) HYdM1s6vo
mergeSort(data, temp, mid + 1, r); $FPq8$V
else (.#nl}fA
insertSort(data, mid + 1, r - mid); X_78;T)uA
J1w[gf]J
for (i = l; i <= mid; i++) { fG0ZVV!
temp = data; KdoI
} a>v *
for (j = 1; j <= r - mid; j++) { m"!SyN}&9?
temp[r - j + 1] = data[j + mid]; /r7xA}se^
} ?}Zo~]7E
int a = temp[l]; # xO PF9
int b = temp[r]; [5&k{*}}
for (i = l, j = r, k = l; k <= r; k++) { `CWhjL8^
if (a < b) { (2b${Q@V
data[k] = temp[i++]; cW*v))@2
a = temp; m7k }k)
} else { dXTD8 )&
data[k] = temp[j--]; )c11_1;
b = temp[j]; lAnq2j|
} V*n$$-5 1-
} wNmpUO ?
} ]gBnzh.
Ek<Qz5)
/** T";evM66
* @param data sK#)k\w>
* @param l c0o]O[
* @param i WOn53|GQK
*/ WWpMuB_G
private void insertSort(int[] data, int start, int len) { %_|KiW
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); Hhtl~2t!0
} y[b8rv
} Q"I(3 tp9[
} bUcp8
} `}ak]Z_
;a?<7LIx
堆排序： G' U_I
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package org.rut.util.algorithm.support; e 6mZ;y5_
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import org.rut.util.algorithm.SortUtil; O[d#-0s
1%_RXQVG
/** i bzY&f
* @author treeroot /phMrL=
* @since 2006-2-2 ,yC..aI
* @version 1.0 K<^p~'f4P
*/ g>t1rZ
public class HeapSort implements SortUtil.Sort{ bll[E}E|3
*)RKU),3nL
/* (non-Javadoc) >N#Nz 0|(
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) g**!'T4&o
*/ MFROAVPZ5
public void sort(int[] data) { #e@NV4q
MaxHeap h=new MaxHeap(); #QFz /6
h.init(data); 9\EW~OgTu
for(int i=0;i h.remove(); pFH.beY
System.arraycopy(h.queue,1,data,0,data.length); e%e.|+
} L;0 NR(b!
Dn)yBA%
private static class MaxHeap{ tU?BR<q
U,!qNi}
void init(int[] data){ ]EHsRd
this.queue=new int[data.length+1]; q0}u%Yz
for(int i=0;i queue[++size]=data; =@d#@
fixUp(size); CcUF)$kz
} w1I07 (
} FO/cEu
z%E(o%l8
private int size=0; Tw';;euw
KKsVZ~<6u
private int[] queue; ^N^G?{EV/#
sUlf4<_zW
public int get() { ow'G&<0b
return queue[1]; HrE,K\^
} )n)AmNpq
X{x(p
public void remove() { S*<Jy(:n
SortUtil.swap(queue,1,size--); ou-#+Sdd
fixDown(1); poAJl;T
} (d#&m+ g]
file://fixdown ry|a_3X(I
private void fixDown(int k) { XMS:F]HN
int j; no8\Oees
while ((j = k << 1) <= size) { "_&ZRcd*
if (j < size %26amp;%26amp; queue[j] j++; Y$>NsgQn6
if (queue[k]>queue[j]) file://不用交换 {> ,M
break; sl-wNIQ
SortUtil.swap(queue,j,k); :h(RS;
k = j; i[[.1MnS
} (nO2+@!
} K+|XI|1p
private void fixUp(int k) { qh.F}9o
while (k > 1) { gM&O dT+i
int j = k >> 1; @2T8H
if (queue[j]>queue[k]) }vh <x6
break; _FOIMjh%N
SortUtil.swap(queue,j,k); H<|}pZ
k = j; S"*k#ao
} j1`<+YT<#
} "*HM8\
693"Pg8b
} 2->Lz
8SU0q9X.
} a+HK fK
O#k; O*s'
SortUtil： {XIpHr
*` mxv0w~(
package org.rut.util.algorithm; kBqgz|jE%
Ye]K 74M.
import org.rut.util.algorithm.support.BubbleSort; b_`h2dUq
import org.rut.util.algorithm.support.HeapSort; r^6@Zwox]
import org.rut.util.algorithm.support.ImprovedMergeSort; k.b=EX|
import org.rut.util.algorithm.support.ImprovedQuickSort; 9ye!kYF,
import org.rut.util.algorithm.support.InsertSort; LCSvw
import org.rut.util.algorithm.support.MergeSort; T;3qE1c
import org.rut.util.algorithm.support.QuickSort; rrz([2E2
import org.rut.util.algorithm.support.SelectionSort; \)5mO 8w
import org.rut.util.algorithm.support.ShellSort; <pV8 +V)
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/** C[.Xi
* @author treeroot f3Zf97i
* @since 2006-2-2 Sed8Q-m
* @version 1.0 Ej)7[
*/ @?e~l:g})g
public class SortUtil { y0Gblza
public final static int INSERT = 1; ^;ZpK@Luk
public final static int BUBBLE = 2; -HGRrWS
public final static int SELECTION = 3; 4 .c1
public final static int SHELL = 4; QOK,-
public final static int QUICK = 5; >yKz8SV#
public final static int IMPROVED_QUICK = 6; QGI@5
public final static int MERGE = 7; %0 {_b68x
public final static int IMPROVED_MERGE = 8; x*:VE57,z
public final static int HEAP = 9; EUs9BJFP
:l"BNT[/
public static void sort(int[] data) { m#_Rv
sort(data, IMPROVED_QUICK); i7-i!`<
} Xg]Cq"RJC
private static String[] name={ zWU]4;,"
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" q#AIN`H
}; ,+IFV
S'^ q
private static Sort[] impl=new Sort[]{ "f 89
new InsertSort(), |hj!NhBe
new BubbleSort(), u=Ik&^v Wq
new SelectionSort(), ,\iXZ5"R
new ShellSort(), )#z{P[X^
new QuickSort(), h2x9LPLBxT
new ImprovedQuickSort(), baD063P;
new MergeSort(), K"VcPDK
new ImprovedMergeSort(), 5?HwM[`
new HeapSort() 9,~7,Py}
}; }wRm ~
&xB*Shp,B
public static String toString(int algorithm){ w>cqsTq
return name[algorithm-1]; Q*I8RAfd
} s}". po]
fZ &
public static void sort(int[] data, int algorithm) { L3HC-
impl[algorithm-1].sort(data); y+k^CT/u
} Ph]b6
NA2={RB;
public static interface Sort { vGlVr.)
public void sort(int[] data); (/<Nh7C1c
} pt"9zkPj
T0dD:sN
public static void swap(int[] data, int i, int j) { "[P3b"=gW
int temp = data; MG=8`J-`
data = data[j]; D|Q7dIZm
data[j] = temp; (_4DZMf
} C{m%]jKH
} [u!n=ev