[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; |j 6OM{@
} B" 3dQwQ
int i1=l; Qx[t/~
int i2=mid+1; irN6g#B?
for(int cur=l;cur<=r;cur++){ -WYAN:s
if(i1==mid+1) P;k0W>~k
data[cur]=temp[i2++]; z)HD`Ho
else if(i2>r) i86>]
data[cur]=temp[i1++]; E*jP87g
else if(temp[i1] data[cur]=temp[i1++]; ?s:d[To6
else 44-R!
data[cur]=temp[i2++]; <vXGi
} 8P=o4lO+
} C`5
OK\A</8r
} w: >5=mfk
Y[L-7^o@y
改进后的归并排序: q7"7U=W0
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package org.rut.util.algorithm.support; ^a#X9
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import org.rut.util.algorithm.SortUtil; Me=CSQqf<
Br`IW
/** tO0!5#-VR
* @author treeroot [H=)
* @since 2006-2-2 4q<=K=F
* @version 1.0 P3oI2\)*i
*/ R+Y4|
public class ImprovedMergeSort implements SortUtil.Sort { e*L.U~ZR
.w]GWL
private static final int THRESHOLD = 10; XP@1~$
8stwg'
/* j\m_o% 4
* (non-Javadoc) _)\c&.p]f
* s>^dxF!+
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) e[8LmuIZ
*/ u?9" jX
public void sort(int[] data) { !%c'$f/
int[] temp=new int[data.length]; .-<k>9S7_
mergeSort(data,temp,0,data.length-1); IKi5 v~bE
} B9wPU1
e6!LSx}y
private void mergeSort(int[] data, int[] temp, int l, int r) { DG?"5:Zd
int i, j, k; VZ\B<i
int mid = (l + r) / 2; A,`8#-AX
if (l == r) VqS#waNrx
return; kcQ'$<Mz<
if ((mid - l) >= THRESHOLD) FXs*vg`
mergeSort(data, temp, l, mid); 4n4?4BEn
else 2Y7)WPn
insertSort(data, l, mid - l + 1); +=:#wzK@
if ((r - mid) > THRESHOLD) Z.M,NR
mergeSort(data, temp, mid + 1, r); lv]hTH 4T
else 3mOtW%Hl
insertSort(data, mid + 1, r - mid); 3YZs+d.;ib
pZeE61c/
for (i = l; i <= mid; i++) { k68F-e[i^
temp = data; .B\5OI,]
} FHC\?Cg
for (j = 1; j <= r - mid; j++) { 5Lf{8UxI
temp[r - j + 1] = data[j + mid]; 0lv%`,
} !&"<oPjr+
int a = temp[l]; t 89!Ihk
int b = temp[r]; A]DTUdL
for (i = l, j = r, k = l; k <= r; k++) { 0$-xw
if (a < b) { HvVts\f
data[k] = temp[i++]; >ss/D^YS
a = temp; ;v$4$D]L
} else { ?`4+cx}n
data[k] = temp[j--]; zSFDUZ]A3
b = temp[j]; kSDZZx
} ]Oif|k`{
} \.3D~2cU
} tQylT0'[+o
~I}&V T
/** $5*WLG&AK
* @param data Z"AQp _
* @param l rSJ9v:
* @param i ?|39u{
*/ 3.qTLga|}
private void insertSort(int[] data, int start, int len) { lgb?)=
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 3%E74 mOcD
} (x3.poSt
} pbU!dOU~e
} Q*b]_0Rb
} *q1%IJ
;dzL}@we
堆排序： /jRRf"B
qu-/"w<3$
package org.rut.util.algorithm.support; $bsG]
]X^rU`":
import org.rut.util.algorithm.SortUtil; t8dm)s[r8
DuOG {
/** )'4k|@8|
* @author treeroot #/Eb*2C`b
* @since 2006-2-2 W]5USFan
* @version 1.0 P<f5*L#HD
*/ 6C+"`(u%V
public class HeapSort implements SortUtil.Sort{ )lZp9O
T16{_
/* (non-Javadoc) /,!B2
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) kJ Mf
*/ Ba/Yl
public void sort(int[] data) { u,w:SM@*(
MaxHeap h=new MaxHeap(); ivW(*c
h.init(data); tz&y*e&
for(int i=0;i h.remove(); aG92ay
System.arraycopy(h.queue,1,data,0,data.length); afb+GA!
} <Ce2r"U1e
$]A/ o(
private static class MaxHeap{ uECsh2Uin
Gqy,u3lE
void init(int[] data){ F 3'9u#
this.queue=new int[data.length+1]; N+y&,N,
for(int i=0;i queue[++size]=data; $O dCL
fixUp(size); gR}35:$Z-
} 1)[]x9]^q'
} G3{=@Z1
1rDqa(7
private int size=0; =%>oR
NwZ@#D#[ Y
private int[] queue; (bh95X
pf_mf.
public int get() { T.qNCJmB
return queue[1]; LK@lpkX
} MKWyP+6`
[/BE8]M~
public void remove() { Y>&Ew*Y
SortUtil.swap(queue,1,size--); Z"uY}P3
fixDown(1); (1NA
} $VxA0 =ad
file://fixdown .({smN,B
private void fixDown(int k) { q|LDo~H
int j; n2IV2^ "
while ((j = k << 1) <= size) { ;j)FnY=:-
if (j < size %26amp;%26amp; queue[j] j++; ?2g`8[">
if (queue[k]>queue[j]) file://不用交换 HO''&hz
break; [l8jRT=R
SortUtil.swap(queue,j,k); 3hK#'."`N
k = j; 8 P>#l.#
} oI#a_/w
} A4]s~Ur
private void fixUp(int k) { K/}rP[H
while (k > 1) { <bD>m[8,
int j = k >> 1; EVNY*&p
if (queue[j]>queue[k]) L^{|uP15N
break; V}zEK0n(6
SortUtil.swap(queue,j,k); D2,z)O%VK
k = j; wWp(yvz
} =lVK IW
} +|ycvHd
_BDK`D
} +tD[9b! m
wW%4d
} *tAg*$
gc?#pP
SortUtil： A2nqf^b{#
is@b&V]
package org.rut.util.algorithm; M_%B|S {
fks)+L'
import org.rut.util.algorithm.support.BubbleSort; bN3#{l-`
import org.rut.util.algorithm.support.HeapSort; r]0 lo-
import org.rut.util.algorithm.support.ImprovedMergeSort; shMSN]S_x
import org.rut.util.algorithm.support.ImprovedQuickSort; A<B=f<N3gV
import org.rut.util.algorithm.support.InsertSort; 7k(Kq5w.
import org.rut.util.algorithm.support.MergeSort; t&(PN%icD
import org.rut.util.algorithm.support.QuickSort; %DQhM,c@
import org.rut.util.algorithm.support.SelectionSort; V3ndV-uQE
import org.rut.util.algorithm.support.ShellSort; RTFZPq84
V14B[|YM<
/** .YZgOJi
* @author treeroot _Dwqy(
* @since 2006-2-2 ykFJ%sw3X
* @version 1.0 %/rMg"f:
*/ V._(q^
public class SortUtil { Ii:>xuF&
public final static int INSERT = 1; 2 6>ZW4Z
public final static int BUBBLE = 2; U.@*`Fg
public final static int SELECTION = 3; ''kS*3
public final static int SHELL = 4; =Z+nX0qF
public final static int QUICK = 5; 7YAIA%8
public final static int IMPROVED_QUICK = 6; y7|P-3[ 4w
public final static int MERGE = 7; 0{j&6I2
public final static int IMPROVED_MERGE = 8; "t0kAG
public final static int HEAP = 9; k}#;Uy=5
ts8+V<g
public static void sort(int[] data) { ymNnkFv
sort(data, IMPROVED_QUICK); NVl [kw
} zR32PG>9
private static String[] name={ FPJd|
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" e*.b3z
}; VnT>K9&3
SnYLdwgl
private static Sort[] impl=new Sort[]{ H&yD*@
new InsertSort(), XB[<;*Iz
new BubbleSort(), 0j_bh,zG#
new SelectionSort(), 8O"U 0
new ShellSort(), EutP\K_Y
new QuickSort(), \t|M-%&)4
new ImprovedQuickSort(), NzW`B^p
new MergeSort(), NxLXm,
new ImprovedMergeSort(), /CIh2 ]#e
new HeapSort() XhPe]P
}; g%k`
P(a.iu5
public static String toString(int algorithm){ w\19[U3
return name[algorithm-1]; g5q$A9.Jl
} $:of=WTY(
8#D:H/`'
public static void sort(int[] data, int algorithm) { ^Eo=W/
impl[algorithm-1].sort(data); ;zdxs'hJ
} >dM8aJzC
zY|klX})
public static interface Sort { NOS>8sy
public void sort(int[] data); _aPh(qprc
} ]0r|_)s
cGwf!hA
public static void swap(int[] data, int i, int j) { p)~lL
int temp = data; Tb1U^E:
data = data[j]; wap3Kd>MP
data[j] = temp; _e7-zg$/
} [qoXMuC|P
} dgo3'ZO