[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; -9{N7H
} /fT"WaTEK
int i1=l; M]{~T7n-
int i2=mid+1; v0)Y,hW
for(int cur=l;cur<=r;cur++){ QlMLWi
if(i1==mid+1) iU 6,B
data[cur]=temp[i2++]; &&C70+_po
else if(i2>r) G^dp9A
data[cur]=temp[i1++]; Ij4q &i"
else if(temp[i1] data[cur]=temp[i1++]; Posz|u<x
else J Y8Rk=
data[cur]=temp[i2++]; -d4v:Jab
} 7SJ=2
} 6?M/71
'62_q8:
} =L#&`s@)_
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改进后的归并排序: 5Q8 H8!^
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package org.rut.util.algorithm.support; M}11 tUl
*> nOL
import org.rut.util.algorithm.SortUtil; bskoi;)u
p#P<V%
/** QjSWl,{ $D
* @author treeroot P<&bAsje
* @since 2006-2-2 FNLS=4
* @version 1.0 `O2P&!9&
*/ yD& Y`f#
public class ImprovedMergeSort implements SortUtil.Sort { y'^U4# (
DQW)^j h
private static final int THRESHOLD = 10; L{jx'[C
wMCg`rk
/* BSHS)_xs
* (non-Javadoc) 3)W_^6>bM
* HJg&fkHn1
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) |^5"-3Q
*/ F5x*#/af
public void sort(int[] data) { (kY0<
int[] temp=new int[data.length]; S"G(_%
mergeSort(data,temp,0,data.length-1); uQ_C<ii"W
} s&VsK#
'q:7PkN!p
private void mergeSort(int[] data, int[] temp, int l, int r) { kI(3Pf].
int i, j, k; yKj}l,i~8
int mid = (l + r) / 2; +zche
if (l == r) %eofG]VM<
return; Yn [ F:Z
if ((mid - l) >= THRESHOLD) {c3FJ5:
mergeSort(data, temp, l, mid); /Q7q2Ne^*
else aG;F=e
insertSort(data, l, mid - l + 1); H:hM(m0?q
if ((r - mid) > THRESHOLD) J2x}@p
mergeSort(data, temp, mid + 1, r); S[$9_Jf
else B6&[_cht
insertSort(data, mid + 1, r - mid); ~x9J&*zxM
1o\2\B=k{
for (i = l; i <= mid; i++) { Heh&;c
temp = data; @ntwdv;
} rz&V.,s
for (j = 1; j <= r - mid; j++) { iB W:t
temp[r - j + 1] = data[j + mid]; XZk%5t|t
} "Ua-7Q&A
int a = temp[l]; q j21#q .
int b = temp[r]; Peph..8Z
for (i = l, j = r, k = l; k <= r; k++) { y>t:flD*
if (a < b) { &uE )Vr4R
data[k] = temp[i++]; N`IXSE
a = temp; ~),%w*L
} else { /y{fDCC
data[k] = temp[j--]; ?,riwDI 2
b = temp[j]; V2?{ebx`
} yc]_?S>9
} "4WnDd5"
} +pT;; 9
Jxe5y3* (
/** #y#TEw,
* @param data X1P1 $RdkR
* @param l 4.,|vtp
* @param i ^kcuRJ0*$
*/ qk'&:A
private void insertSort(int[] data, int start, int len) { Y1r'\@L w
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); vA:ZR=)F
} 9A4n8,&sm
} v `/nX->
} Jgr;'U$
} feB ?
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堆排序： mIG>`7`7N
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package org.rut.util.algorithm.support; |7,$.MK-@
uZ_?x~V/
import org.rut.util.algorithm.SortUtil; H74'I}
<?KgzIq2
/** cu5}(
* @author treeroot (T2HUmkQ6
* @since 2006-2-2 "Y^Fn,c
* @version 1.0 "dv\ 9O
*/ MwQtf(_
public class HeapSort implements SortUtil.Sort{ NMw5ixl
c %Y*XJ'
/* (non-Javadoc) @6DKw;Q
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) |b='DJz2
*/ bt1bTo
public void sort(int[] data) { L=Aj+
MaxHeap h=new MaxHeap(); r*mYtS
h.init(data); 2Q(ZW@0
for(int i=0;i h.remove(); J_&cI%.
System.arraycopy(h.queue,1,data,0,data.length); 7ZAxhFC
} YG*<jKcX
>#r0k|3J^J
private static class MaxHeap{ {-7ovH?
`R (N3
void init(int[] data){ fl4@5AVY
this.queue=new int[data.length+1]; a0JMLLa [I
for(int i=0;i queue[++size]=data; <w~$S0_
fixUp(size); 7Tr '<(A
} V+>RF
} 2<0".5+I
x%$6l
private int size=0; =HMCNl
>(n/
private int[] queue; R3_;!/1
|]q{qsy
public int get() { V3*@n*"N;
return queue[1]; LQ Ux}
} *j,noHUT~>
N!?~Dgw
public void remove() { &~.|9P/45
SortUtil.swap(queue,1,size--); E 8W*^^z(
fixDown(1); |,n(9Ix
} ^oDs*F
file://fixdown 4$2HO`@uN
private void fixDown(int k) { T^d<vH
int j; K\ pZ
while ((j = k << 1) <= size) { A9Ea}v9:
if (j < size %26amp;%26amp; queue[j] j++; |iSwG=&
if (queue[k]>queue[j]) file://不用交换 2XBHo (
break; BH}rg,]G
SortUtil.swap(queue,j,k); H 9/m6F
k = j; 1GR|$E
} 90JWU$K
} )knK'H(
private void fixUp(int k) { ${.:(z
while (k > 1) { $i8oLSRV
int j = k >> 1; It3@ Cd>
if (queue[j]>queue[k]) d\A7}_r*x
break; A;/,</
SortUtil.swap(queue,j,k); =VWH8w.3
k = j; YyYp-0#
} 6x!iL\Y~
} W>x.*K
Zn|lL0b{q
} Wa?\W&
)!zg=}V
} )WEOqaR]
T9}dgf
SortUtil： vXdI)Sx[
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package org.rut.util.algorithm; a(-t"OL\
6]!Jo)BF
import org.rut.util.algorithm.support.BubbleSort; N-p||u
import org.rut.util.algorithm.support.HeapSort; 6I]{cm
import org.rut.util.algorithm.support.ImprovedMergeSort; }ew)QHd
import org.rut.util.algorithm.support.ImprovedQuickSort; ,*L3
import org.rut.util.algorithm.support.InsertSort; b83m'`vRM
import org.rut.util.algorithm.support.MergeSort; h}m9L!+n8
import org.rut.util.algorithm.support.QuickSort; |U~\;m@
import org.rut.util.algorithm.support.SelectionSort; &u2m6 r>W
import org.rut.util.algorithm.support.ShellSort; r5lPO*?Df
Fkqw#s(T
/** Aba%QQQ
* @author treeroot z+_d*\
* @since 2006-2-2 [w FK!?
* @version 1.0 _lH:%E*
*/ @%MGLR{pH
public class SortUtil { ~WmA55
public final static int INSERT = 1; se_Oi$VZ{
public final static int BUBBLE = 2; n;.);
public final static int SELECTION = 3; 4Dd]:2|D
public final static int SHELL = 4; /GNm>NSK
public final static int QUICK = 5; O+DYh=m*p
public final static int IMPROVED_QUICK = 6; T!&VT;
public final static int MERGE = 7; ){tTB
public final static int IMPROVED_MERGE = 8; `Z@qWB<
public final static int HEAP = 9; 2tp95E`(O
; jJ%<
public static void sort(int[] data) { F'@[b
sort(data, IMPROVED_QUICK); y&F&Z3t
} PC?XE8o
private static String[] name={ DnB :~&Dw
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" \VAS<?3
}; Z7MGBwP(
sdQ"[`~2R
private static Sort[] impl=new Sort[]{ *APTgXYR
new InsertSort(), SQG9m2
new BubbleSort(), f Lns^
new SelectionSort(), UtB~joaR
new ShellSort(), +4]f6Zz({
new QuickSort(), ir;az{T#U
new ImprovedQuickSort(), \-Q6z8
new MergeSort(), NF*Z<$'%
new ImprovedMergeSort(), .Ax]SNZ+:A
new HeapSort() FCt %of#
}; EHq?yj;
AHP;N6Y6
public static String toString(int algorithm){ n--s[Kdo8
return name[algorithm-1]; [:{HX U7y
} @PKY>58)
A9y3B^\*
public static void sort(int[] data, int algorithm) { F^wm&:%{`
impl[algorithm-1].sort(data); SivJaY%
} 0{47TX*YX
w"h3e
public static interface Sort { KD..X~Me
public void sort(int[] data); =|3*Y0
} M+M\3U
F*,RDM'M
public static void swap(int[] data, int i, int j) { sH{(=N
int temp = data; ]RI+:f
data = data[j]; T^nOv2@,
data[j] = temp; S),acc(d
} /V>yF&p
} `+T"^{ Z