[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; frWw-<HoI
} 4N[8LC;MH
int i1=l; q~^Jd=cB\
int i2=mid+1; bJ*jJl x
for(int cur=l;cur<=r;cur++){ GPy+\P`
if(i1==mid+1) nbj&3z,
data[cur]=temp[i2++]; ex @e-<
else if(i2>r) VC:.ya|Z
data[cur]=temp[i1++]; u7=`u/
else if(temp[i1] data[cur]=temp[i1++]; QeuIAs*_
else w^s|YF=c
data[cur]=temp[i2++]; _n,Ye&m
} gI~Ru8
} (|(#~o]40t
JK4vQWy
} _Y4%Fv>@
t4R=$ km
改进后的归并排序: aze}koNE
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package org.rut.util.algorithm.support; Z 7rVM
+!\$SOaR{
import org.rut.util.algorithm.SortUtil; R3`!Xj#&M
)@Fuw*
/** 8%S5Fc#am
* @author treeroot tY-{uHW&h
* @since 2006-2-2 &> tmzlww
* @version 1.0 8 ;y N
*/ /~yk
public class ImprovedMergeSort implements SortUtil.Sort { v@_b"w_TY
p&/}0eL y
private static final int THRESHOLD = 10; Zg"g/I.+d
R=yn4>I
/* `rzgC \
* (non-Javadoc) :@a8>i1&
* hg_@Ui@[z
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) &k*sxW'
*/ wWB-P6
public void sort(int[] data) { yANk(
int[] temp=new int[data.length]; ~Wp>tnl
mergeSort(data,temp,0,data.length-1); ;N6Euiz
} ^ ry
78&jaw*1A
private void mergeSort(int[] data, int[] temp, int l, int r) { {s&6C-
int i, j, k; ~1jSz-s
int mid = (l + r) / 2; JE9SPFQx9M
if (l == r) {hr>m,O%
return; Hy`Ee7>
if ((mid - l) >= THRESHOLD) u;R<
mergeSort(data, temp, l, mid); 0l=g$G \%
else } QVREj
insertSort(data, l, mid - l + 1); FJDx80J
if ((r - mid) > THRESHOLD) atRWKsY<
mergeSort(data, temp, mid + 1, r); 7t &KKKV
else 99j^<)
insertSort(data, mid + 1, r - mid); 0\*[7!`s
sDA&U9;
for (i = l; i <= mid; i++) { .\K0+b;
temp = data; #/a>dK
} 4jMCE&<
for (j = 1; j <= r - mid; j++) { LxaR1E(Cc'
temp[r - j + 1] = data[j + mid]; b2]1Dfw
} g/e\EkT
int a = temp[l]; 2MaHD}1Jw
int b = temp[r]; ?.Z4GWyXa
for (i = l, j = r, k = l; k <= r; k++) { <3i2(k
if (a < b) { ;/T=ctIs
data[k] = temp[i++]; k`ulDQu
a = temp; u hW@ Y+
} else { %s<7M@]f
data[k] = temp[j--]; b3]QH h/
b = temp[j]; OIPJN8V
} ]w ^9qS
} i7]\}w|
} ',`GdfAsH
Y~@@{zP
/** d;1%Ei3K
* @param data -wJ/j~+m+
* @param l yzJ VU0s
* @param i \1x<bx/1
*/ RS'!>9I
private void insertSort(int[] data, int start, int len) { }j9V0`Q
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); d/oxRzk'L
} ,ND}T#yTR
} !;EG<ji,gj
} zQvp<IUq
} CJ0{>?
5R"My^G
堆排序： 2w6y
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package org.rut.util.algorithm.support; Qxb5Y)/jn
X;`XkOjk
import org.rut.util.algorithm.SortUtil; 7L68voC@U
rik-C7
/** ,FWC|uM"
* @author treeroot AY3nQH
* @since 2006-2-2 R)4L]ZF
* @version 1.0 Xi vzhI4
*/ 3zi(|B[,?
public class HeapSort implements SortUtil.Sort{ 1C) l)pV
L9L!V"So1k
/* (non-Javadoc) 2rK%fV53b
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 6%'bo`S#
*/ |oCE7'BaP
public void sort(int[] data) { ';<gc5EK
MaxHeap h=new MaxHeap(); 1Q-O&\-xg
h.init(data); =P>c1T1-
for(int i=0;i h.remove(); ~@g7b`t=la
System.arraycopy(h.queue,1,data,0,data.length); yKSvg5lLy
} ~:8}Bz2!5
s az<NT
private static class MaxHeap{ Tp7*T8
8)n799<.
void init(int[] data){ !e+ex"7
this.queue=new int[data.length+1]; w#ha ^4
for(int i=0;i queue[++size]=data; o1I8l7
fixUp(size); YMGzO
} `yiw<9yp2
} Cbw@:+%J{
aH@GhI^@
private int size=0; zW[fHa$m
~%)ug3%e
private int[] queue; mWhQds6
'L$%)`;e
public int get() { GZt+(q
return queue[1]; \jlem<&
} jvGGIb"&1
ey4RKk,
public void remove() { %p?+r
SortUtil.swap(queue,1,size--); )qxZHV
fixDown(1); i n}N[
} `` !BE"yN
file://fixdown _; 7{1n
private void fixDown(int k) { #9=as Y
int j; Z.:g8Xl-6
while ((j = k << 1) <= size) { lN@SfM4\
if (j < size %26amp;%26amp; queue[j] j++; !2]eVO
if (queue[k]>queue[j]) file://不用交换 df@r2 /Y
break; +OGa}9j-
SortUtil.swap(queue,j,k); /F/zMZGSA{
k = j; 1D@'uApi.
} 3RSiu}
} d5aG6/
private void fixUp(int k) { ){'Ef_/R
while (k > 1) { Z1@E
int j = k >> 1; 0M[O(.x
if (queue[j]>queue[k]) POZ5W)F(
break; W ='c+3O6
SortUtil.swap(queue,j,k); }r%Si
k = j; W+F{!dW
} ,_ zivUU
} 8v eG^o
G:u-C<^'
} AHg:`Wjv-
/E(319u_
} 99xs5!4s
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SortUtil： )83UF r4kP
6 GL.bS
package org.rut.util.algorithm; (f Gmjx
H);O.m
import org.rut.util.algorithm.support.BubbleSort; sR(or=ub~
import org.rut.util.algorithm.support.HeapSort; m6'VMW
import org.rut.util.algorithm.support.ImprovedMergeSort; s"tyCDc.c
import org.rut.util.algorithm.support.ImprovedQuickSort; 12W`7
import org.rut.util.algorithm.support.InsertSort; \U(;%V
import org.rut.util.algorithm.support.MergeSort; .Oh4b5
import org.rut.util.algorithm.support.QuickSort; Etv!:\\[
import org.rut.util.algorithm.support.SelectionSort; /&PRw<}>_o
import org.rut.util.algorithm.support.ShellSort; EL--?<g
]f%yeD
/** M|HW$8V3_2
* @author treeroot (4;m*'X
* @since 2006-2-2 C2$_Ad=s
* @version 1.0 y,D@[*~Xb
*/ +0{$J\s
public class SortUtil { ]VuB2L[D
public final static int INSERT = 1; O/Q7{5n
public final static int BUBBLE = 2; wNNInS6
public final static int SELECTION = 3; Q~p)@[q
public final static int SHELL = 4; 25:[VH$:4
public final static int QUICK = 5; T4 :UJj}
public final static int IMPROVED_QUICK = 6; x%J4A+kU
public final static int MERGE = 7; tBJCfM
public final static int IMPROVED_MERGE = 8; H8$l }pOz
public final static int HEAP = 9; CxvL!ew
PTt#Ixn,
public static void sort(int[] data) { @e`%'
sort(data, IMPROVED_QUICK); REEs}88);'
} FabDK :
private static String[] name={ D9hV`fA
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" %MA o<,ha
}; 5X4 #T&.
>#9f{
private static Sort[] impl=new Sort[]{ mNc?`G_R
new InsertSort(), Z$a5vu*pg
new BubbleSort(), Z%rMX}
new SelectionSort(), -^R6U~
new ShellSort(), C'Gj\
new QuickSort(), [9hslk
new ImprovedQuickSort(), g?TPRr~$9
new MergeSort(), MXVQ90
new ImprovedMergeSort(), t>~a/K"
new HeapSort() 6\9 Zc-%
}; v--Qbu
<./r%3$;7
public static String toString(int algorithm){ 2rzOh},RS
return name[algorithm-1]; vS@;D7ep
} PG51+#
*h <_gn
public static void sort(int[] data, int algorithm) { -VC kk
impl[algorithm-1].sort(data); -l:4I6-hi
} _S$SL%;\
rAv)k&l
public static interface Sort { PUU "k:{
public void sort(int[] data); QsO%m
} \/wbk`2
C>}@"eK
public static void swap(int[] data, int i, int j) { Q+i
int temp = data; z(o zMH
data = data[j]; &d%0[Ui`
data[j] = temp; t9QnEP'
} fV "gL(7
} ' F,.y6QU