[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; "7B}hZ^)W
} ?5C'9 V
int i1=l; ]\78(_o.zz
int i2=mid+1; rJ!cma
for(int cur=l;cur<=r;cur++){ Z3`EXs
if(i1==mid+1) >@YefNX6
data[cur]=temp[i2++]; tEhg',2t(
else if(i2>r) ,EB}IG]
data[cur]=temp[i1++]; A]z*#+Sl
else if(temp[i1] data[cur]=temp[i1++]; 7>E.0DP
else K;?D^n.
data[cur]=temp[i2++]; "`vRHeCKN
} !/zRw-q3B
} }s}g}t8v-
<)VgGjZ-H
} f`9Mcli!
V ;T :Q%
改进后的归并排序: A6&*VD
4qQ,1&!]S
package org.rut.util.algorithm.support; G7%bY
gYKz,$
import org.rut.util.algorithm.SortUtil; O `}EiyV
O*EV~{K
/** aLO^>",
* @author treeroot PVCoXOqh
* @since 2006-2-2 @R[{
* @version 1.0 P6:C/B
*/ /).{h'^Hq\
public class ImprovedMergeSort implements SortUtil.Sort { )kD/ 8
CKsVs.:u
private static final int THRESHOLD = 10; ]{>AU^=U
7{;it uqX
/* ?"B]"%M&
* (non-Javadoc) :KLXrr
* uw)7N(os\`
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ym%UuC3^w
*/ Ni,nQ;9
public void sort(int[] data) { 4QL>LK
int[] temp=new int[data.length]; '%NglC[J
mergeSort(data,temp,0,data.length-1); K+B978XD
} %Sr+D{B
=CX1jrLZ
private void mergeSort(int[] data, int[] temp, int l, int r) { ^kez]>
int i, j, k; rd%%NnT"
int mid = (l + r) / 2; )#=J<OpG
if (l == r) ]\$/:f-2
return; +#W94s~0V
if ((mid - l) >= THRESHOLD) Gz[yD ~6a
mergeSort(data, temp, l, mid); r~4uIUE{
else 7u):J
insertSort(data, l, mid - l + 1); rO1!h%&o"
if ((r - mid) > THRESHOLD) 3*b5V<}'|
mergeSort(data, temp, mid + 1, r); w:~*wv
else C-'hXh;hQ
insertSort(data, mid + 1, r - mid); x]~TGzS
w0pMH p'Y
for (i = l; i <= mid; i++) { WyL+HB}
temp = data; Fnw:alWr
} Ha'[uEDb
for (j = 1; j <= r - mid; j++) { Rj8%% G-pt
temp[r - j + 1] = data[j + mid]; c'2d+*[
} K1B9t{T
int a = temp[l]; i|YS>Pw~j
int b = temp[r]; mgs(n5V5
for (i = l, j = r, k = l; k <= r; k++) { a?c&#Jl
if (a < b) { jlEz]@ i
data[k] = temp[i++]; :+rGBkw1m
a = temp; 7s9h:/Lu
} else { wj|Zn+{"nF
data[k] = temp[j--]; Vz{+3vfra6
b = temp[j]; ?6#won
} sDY~jP[Oa
} IK~&`n](>
} [6/QUD8
\mqx '
/** c8RJOc4X
* @param data }aCa2%
* @param l XYE|=Tr]
* @param i x0*{oP
*/ M`xiC
private void insertSort(int[] data, int start, int len) { gv#\}/->4
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); Y+gY"
} 3a/n/_D
} Y.tx$%
} s\ IKSoE
} *7BfK(9T
k;WD[SV
堆排序： /?\3%<vn
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package org.rut.util.algorithm.support; 2z.ot'
Hvl n>x@
import org.rut.util.algorithm.SortUtil; Wboh2:TH:
k4TWfl^}9
/** D:)Wr, 26
* @author treeroot cs9^&N:w[
* @since 2006-2-2 v9$!v^U"D
* @version 1.0 rr<E#w
*/ &4#Zi.]
public class HeapSort implements SortUtil.Sort{ bp1AN9~
.8hI ad
/* (non-Javadoc) 2hE(h
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Ia&R/I
*/ Uv^\[
public void sort(int[] data) { 6Rd4waj_,U
MaxHeap h=new MaxHeap(); vDy&sgS$<
h.init(data); p7h#.m~Qu
for(int i=0;i h.remove(); WWT1=#"
System.arraycopy(h.queue,1,data,0,data.length); 5{Cz!ut;tE
} uOxHa>h
PT"}2sR)
private static class MaxHeap{ }Q7y tE
4#U}bN
void init(int[] data){ `]Bb0h1![
this.queue=new int[data.length+1]; s6H'}[E<
for(int i=0;i queue[++size]=data; ZedFhm
fixUp(size); <v"o+
} 8;PkuJR_]
} yNTd_XPL
DE?v'7cmA
private int size=0; &W `xZyb3
R>Ra~b
private int[] queue; n|`3d~9$&
n ]ikc|
public int get() { rg/{5f
return queue[1]; DwD$T%kF
} b7Y g~Lw
xO$P C,
public void remove() { @hLkU4S
SortUtil.swap(queue,1,size--); Cs $5Of(
fixDown(1); {]vD@)k
} >1y6DC
file://fixdown jDzQw>TX
private void fixDown(int k) { 1Pf(.&/9_
int j; S_}`'Z )
while ((j = k << 1) <= size) { Cj5mM[:s
if (j < size %26amp;%26amp; queue[j] j++; Lu.zc='\
if (queue[k]>queue[j]) file://不用交换 UHBXq;?&q
break; K^-1M?
SortUtil.swap(queue,j,k); w~'xZ?
k = j; T U%@_vYR
} OvdT* g=8*
} u\R?(G&
private void fixUp(int k) { %pWn9
while (k > 1) { 6iC>CY3CG
int j = k >> 1; bbm\y] !t
if (queue[j]>queue[k]) dZM^?rq
break; oy+|:[v:Fk
SortUtil.swap(queue,j,k); +2uSMr
k = j; CB@7XUR
} $JE,u'JQ
} !(sn9z#
e3~MU6
} >mGH4{H
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} g40Hj Y
OATdmHW
SortUtil： Uj@th
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package org.rut.util.algorithm; ?H{[u rLn
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import org.rut.util.algorithm.support.BubbleSort; [m~J6WB
import org.rut.util.algorithm.support.HeapSort; .6?"<zdPU
import org.rut.util.algorithm.support.ImprovedMergeSort; igO>)XbsM
import org.rut.util.algorithm.support.ImprovedQuickSort; MDMd$]CW
import org.rut.util.algorithm.support.InsertSort; "gJ?LojB<
import org.rut.util.algorithm.support.MergeSort; q*!R4yE;C
import org.rut.util.algorithm.support.QuickSort; )m%uSSx#
import org.rut.util.algorithm.support.SelectionSort; %1z;l.c
import org.rut.util.algorithm.support.ShellSort; MqmQ52HR
Z~'t'.=z
/** t;O)
* @author treeroot 56.!L
* @since 2006-2-2 0.GFg${v`
* @version 1.0 z2=bbm:
*/ V>6klA}o
public class SortUtil { $ {yct
public final static int INSERT = 1; =bKDD<(
public final static int BUBBLE = 2; R|;BO:S1
public final static int SELECTION = 3; 1#vy# '
public final static int SHELL = 4; }$6L]
public final static int QUICK = 5; oOFTQB_6
public final static int IMPROVED_QUICK = 6; nep#L>LP$x
public final static int MERGE = 7; ttP7-y
public final static int IMPROVED_MERGE = 8; gt kV=V
public final static int HEAP = 9; "k zKQ~
*D5 xbkH=.
public static void sort(int[] data) { blc?[ [,!
sort(data, IMPROVED_QUICK); [-~pDkf:
} U?[ (
private static String[] name={ K7}.#*% ~
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" ]xC56se
}; U S^% $Z:
]HKt7 %,
private static Sort[] impl=new Sort[]{ jP@ @<dt
new InsertSort(), {QG.> lB
new BubbleSort(), a`O'ZY
new SelectionSort(), ["Zvwes#7
new ShellSort(), G|i0n
new QuickSort(), ~id6^#&>
new ImprovedQuickSort(), 4,RPidv%O
new MergeSort(), E^8|xT'h6
new ImprovedMergeSort(), )e(<YST
new HeapSort() A;AQw
}; mxNd
x#{!hL 5G
public static String toString(int algorithm){ 5K vp%
return name[algorithm-1]; '/Aq2
} @@d_F<Ym[
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public static void sort(int[] data, int algorithm) { Y@,iDQ
impl[algorithm-1].sort(data); a~}q]o?j
} $4bc!
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public static interface Sort { osC?2.
public void sort(int[] data); .7iRV
} r$jWjb
R%r bysP
public static void swap(int[] data, int i, int j) { Tigw+2
int temp = data; 6St=r)_
data = data[j]; |Xt G9A>
data[j] = temp; xAmtm"
} RpdUR*K9x
} !'f7;%7s