[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; ]UtfI
} /UwB6s(
int i1=l; n U0
int i2=mid+1; -SyQ`V)T7N
for(int cur=l;cur<=r;cur++){ i3bDU(GS
if(i1==mid+1) rn$LZE %
data[cur]=temp[i2++]; -0pAj}_2}
else if(i2>r) MST\_s%[
data[cur]=temp[i1++]; mpsi{%gA
else if(temp[i1] data[cur]=temp[i1++]; l,}^<P]
else =g]Ln)jc
data[cur]=temp[i2++]; R 4= ~
} Z@Tb3N/[
} p#k>BHgnF
gb_r <j:w
} #2dd`F8
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改进后的归并排序: lWiC$
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package org.rut.util.algorithm.support; z}772hMB
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import org.rut.util.algorithm.SortUtil; z8MKGM
}&E'ox<S
/** ]]R!MnU:$
* @author treeroot @<^_ _."
* @since 2006-2-2 qD#E, "%
* @version 1.0 DK\Ud6w
*/ *x0nAo_n
public class ImprovedMergeSort implements SortUtil.Sort { s":\>
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private static final int THRESHOLD = 10; HB/q v IzB
ZxvqLu
/* }DCR(p rD
* (non-Javadoc) $e99[y@
* >vr!3
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) S2^Ckg
*/ IY* ~df
public void sort(int[] data) { 4`KQ@m
int[] temp=new int[data.length]; {[ E7Cf
mergeSort(data,temp,0,data.length-1); ;usv/8
} LTof$4s
vt(A?$j|A
private void mergeSort(int[] data, int[] temp, int l, int r) { 1\hh,s
int i, j, k; P&6hk6#
int mid = (l + r) / 2; Q&JnF`*
if (l == r) U]8 @
return; Ao2m"ym
if ((mid - l) >= THRESHOLD) |FR'?y1
mergeSort(data, temp, l, mid); dn? #}^,"
else Nt>wzPd)
insertSort(data, l, mid - l + 1); Ke5fe#
if ((r - mid) > THRESHOLD) #z(JYw,
mergeSort(data, temp, mid + 1, r); x)^/3
else RyAss0Sm^
insertSort(data, mid + 1, r - mid); K6 {0`'x
y4^w8'%MC
for (i = l; i <= mid; i++) { g^`;B"
temp = data; iC$mb~G
} r+#!]wNPe
for (j = 1; j <= r - mid; j++) { Pc{0Js5VzE
temp[r - j + 1] = data[j + mid]; o3s ME2
} ]<Ugg
int a = temp[l]; Za5bx,^
int b = temp[r]; ~_;x o?@ba
for (i = l, j = r, k = l; k <= r; k++) { c@uNA0 p
if (a < b) { lZ\8$,B)
data[k] = temp[i++]; vWGjc2_
a = temp; j/C.='?%
} else { ;Wo\MN
data[k] = temp[j--]; +!'rwD
b = temp[j]; xlhc`wdm
} b`TA2h
} Q\!0V@$
} :(^,WOf
Sz"rp9x+
/** f0<'IgN
* @param data 2V-zmyJs5
* @param l zG[GyyAQ
* @param i vv9=g*"j
*/ qYwEPGa\
private void insertSort(int[] data, int start, int len) { SccaX P
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); xM#+jI
} GD]yP..
} C}7c:4c
} !8z,}HUdK
} @@])B#
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堆排序： !_ng_,J
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package org.rut.util.algorithm.support; 2#^@awJ ?
)`*=P}D
import org.rut.util.algorithm.SortUtil; u>YC4&
K]<49`MX
/** t9!8Bh<
* @author treeroot *h H\H
* @since 2006-2-2 +VN&kCx)
* @version 1.0 4ox[,
*/ 2v;F@fUB.
public class HeapSort implements SortUtil.Sort{ 7I_1Lnnf
q@"0(Oj
/* (non-Javadoc) IKm_YQ$XOy
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) (b]r_|'
*/ b/yXE)3 X
public void sort(int[] data) { (B0tgg^jj,
MaxHeap h=new MaxHeap(); 5y1:oiE/
h.init(data); tbNIl cAWS
for(int i=0;i h.remove(); 3~r>G
System.arraycopy(h.queue,1,data,0,data.length); {cYS0%Go
} zx(=ArCRr
9/@7NNKJ
private static class MaxHeap{ 3=)!9;uY
8ph*S&H
void init(int[] data){ <z=d5g{n
this.queue=new int[data.length+1]; pow.@
for(int i=0;i queue[++size]=data; 5*n3*rbU:
fixUp(size); o\M
} K).Gj2 $
} LzS)WjEN
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private int size=0; LXGlG
_>k&,p]y
private int[] queue; Q#Vg5H4
V"r2 t9A
public int get() { OH*
return queue[1]; (PM!{u=
} MoFAQe
tr<iFT}C
public void remove() { .[qm>j,
SortUtil.swap(queue,1,size--); 9(CY"Tc3
fixDown(1); T+0Z2H
} "E6*.EtTN#
file://fixdown Hl3%+f
private void fixDown(int k) { =MsQ=:ZV
int j; pSzO)j
while ((j = k << 1) <= size) { a@ub%laL Z
if (j < size %26amp;%26amp; queue[j] j++; P`HDQ/^O
if (queue[k]>queue[j]) file://不用交换 1dl@2CVS
break; \d,wcL
SortUtil.swap(queue,j,k); {Y(#<UDM
k = j; Q8~|0X\.g
} DC5^k[m
} z+k[HE^S
private void fixUp(int k) { )5O E~}>
while (k > 1) { [@PD[-2QG3
int j = k >> 1; >,&@j,?']
if (queue[j]>queue[k]) o-f;$]yp>
break; ==?!z<I.d
SortUtil.swap(queue,j,k); |BC/ERms
k = j; A0@E^bG
} (:spA5
} >p[skN
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} +'@j~\>^yJ
nc.(bb),
} KbcmK(`_
c=52*&
SortUtil： ma%PVz`I;9
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package org.rut.util.algorithm; \D<w:\P
a St
import org.rut.util.algorithm.support.BubbleSort; ]c=nkS
import org.rut.util.algorithm.support.HeapSort; "3r7/>xy
import org.rut.util.algorithm.support.ImprovedMergeSort; ?uBZ"^'
import org.rut.util.algorithm.support.ImprovedQuickSort; zBKfaQI,
import org.rut.util.algorithm.support.InsertSort; ?##3E, /"9
import org.rut.util.algorithm.support.MergeSort; ?c;T4@mB
import org.rut.util.algorithm.support.QuickSort; ~hk;OB;
import org.rut.util.algorithm.support.SelectionSort; 3`mM0,fY
import org.rut.util.algorithm.support.ShellSort; z5|m`$gy
ALOS>Bi&
/** icw (y(W
* @author treeroot "~|;XoMU
* @since 2006-2-2 tS@J)p+_(
* @version 1.0 yG ,oSp|
*/ us0{y7(p
public class SortUtil { 6zf3A:]&{
public final static int INSERT = 1; cj5;XK
public final static int BUBBLE = 2; !gKz=-C
public final static int SELECTION = 3; 1\{_bUZ&
public final static int SHELL = 4; Bw`7ND}&
public final static int QUICK = 5; W7 .Y`u[
public final static int IMPROVED_QUICK = 6; \H-,^[G3
public final static int MERGE = 7; q"uP%TN
public final static int IMPROVED_MERGE = 8; RY4b<i3
public final static int HEAP = 9; 'ZUB:R@[
p[J 8 r{'
public static void sort(int[] data) { VOY#Y*)g
sort(data, IMPROVED_QUICK); H({Y
} z/Kjz$l!
private static String[] name={ L4x08 e
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 3SMb#ce*o
}; itpljh
M< 1rQW'
private static Sort[] impl=new Sort[]{ DJGq=*
new InsertSort(), v Wt{kg;
new BubbleSort(), @}r2xY1
new SelectionSort(), ?L'4*S]
new ShellSort(), V|njgcn d
new QuickSort(), iL](w3EM
new ImprovedQuickSort(), #zL0P>P'a
new MergeSort(), KBO{g:"
new ImprovedMergeSort(), =ll{M{0Q]!
new HeapSort() rRK^vfoJ`
}; v6$ }saTX
:-.K.Ch|:
public static String toString(int algorithm){ +kXj+2
return name[algorithm-1]; CL%+`c0
} EK JPeeRY
DJu&l
public static void sort(int[] data, int algorithm) { OSDx
impl[algorithm-1].sort(data); t]QGyW A]
} K~MTbdg
.Y^UPxf@
public static interface Sort { YcQ3:i
public void sort(int[] data); U&\2\z3{
} `Qrrnq
VZRM=;V
public static void swap(int[] data, int i, int j) { O6Gg?j
int temp = data; mH/$_x)o
data = data[j]; -eA3o2'
data[j] = temp; |K jy4.2
} 2^TJ_xG~
} =64%eF