[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; G2]^F Y
} /s|{by`we4
int i1=l; 3OP.12^
int i2=mid+1; p0M=t-
for(int cur=l;cur<=r;cur++){ (#o t^
if(i1==mid+1) KiAcA]0
data[cur]=temp[i2++]; O8lFx_N7Q
else if(i2>r) n'K6vW3
data[cur]=temp[i1++]; FLZSK:3B]
else if(temp[i1] data[cur]=temp[i1++]; =&7@<vBpy
else =i>\2J%'R
data[cur]=temp[i2++]; Q[PK`*2)
} \dcdw*v@
} kUa)smh
5M:D?9E+
} ES}. xZ#~
d~@q%-`lA
改进后的归并排序: /r^[a,Q#x
s+,&|;Q
package org.rut.util.algorithm.support; m'x;,xfY&F
^ve14mbF#.
import org.rut.util.algorithm.SortUtil; %d;<2b0
GK?4@<fY
/** .9h)bf+
* @author treeroot 5G(E&>~
* @since 2006-2-2 t> . Fl-
* @version 1.0 DM),|Nq"
*/ c?K~/bx.
public class ImprovedMergeSort implements SortUtil.Sort { Ei5wel6!
i#W*'
private static final int THRESHOLD = 10; s;Y<BD
^.goO]
/* Izo!rC
* (non-Javadoc) Zx{96G+1
* bik*ZC?E
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) K2rzhHfb
*/ T8XY fcc*h
public void sort(int[] data) { 3o6RbW0[
int[] temp=new int[data.length]; |P~;C6sf
mergeSort(data,temp,0,data.length-1); ?6P.b6m}0
} *(QH{!-$s
8W+5)m.tp
private void mergeSort(int[] data, int[] temp, int l, int r) { #NNewzC<*
int i, j, k; OBOwz4<
int mid = (l + r) / 2; =o^|bih
if (l == r) WeMAe w/d
return; sx 9uV
if ((mid - l) >= THRESHOLD) A:# k
mergeSort(data, temp, l, mid); DBsDkkB{
else M#,Q ^rH#
insertSort(data, l, mid - l + 1); j6g@tx^)'
if ((r - mid) > THRESHOLD) 8=;k"
mergeSort(data, temp, mid + 1, r); 'bu)M1OLi
else >t <pFh
insertSort(data, mid + 1, r - mid); OP! R[27>
O#eZ<hNV
for (i = l; i <= mid; i++) { p &(OZJT
temp = data; U \oy8FZ
} kV&9`c+
for (j = 1; j <= r - mid; j++) { aeP[+I9
temp[r - j + 1] = data[j + mid]; 9&Ne+MY^%
} %Mn.e a
int a = temp[l]; 1n=_y o
int b = temp[r]; sL^yB
for (i = l, j = r, k = l; k <= r; k++) { < <Y}~N
if (a < b) { +K~NV?c
data[k] = temp[i++]; ^,8R,S\}$
a = temp; \Kavw
} else { ^G1%6\We
data[k] = temp[j--]; Yu3zM79'k
b = temp[j]; ~i~%~doa
} K@u&(}
} m:+8J,jW
} gfa[4 z
Q2|p\rO
/** uQqWew8l+
* @param data Pbu{'y3J
* @param l v?:: |{
* @param i kH948<fk3
*/ [xZU!=
private void insertSort(int[] data, int start, int len) { )R2XU
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); OJO!FH)
} SOf{Hx0C6
} ZKpvDH'
} y9l*m~
} O4iC]5@
sLL7]m}
堆排序： /JJw 6[N
n,'OiVl[
package org.rut.util.algorithm.support; h9s >LY
&1|?BZv
import org.rut.util.algorithm.SortUtil; K>/%X!RW
\2C`<h$fN
/** _D, ;MB&7
* @author treeroot NjuiD].
* @since 2006-2-2 R^#@lI~
* @version 1.0 tt_o$D~kg
*/ M8&}j
public class HeapSort implements SortUtil.Sort{ vH[47CvG5
#qBr/+b
/* (non-Javadoc) nY%5cJ`"
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) +IFw_3$
*/ /=?x{(B>
public void sort(int[] data) { q2aYEuu,
MaxHeap h=new MaxHeap(); N)2f7j4C&
h.init(data); Z.PBu|Kx
for(int i=0;i h.remove(); V$`Gwr]|n
System.arraycopy(h.queue,1,data,0,data.length); IM@tN L
} ?~e3&ux
cre;P5^E
private static class MaxHeap{ J3RB]O_
<O<LYN+(
void init(int[] data){ A^\.Z4=d"
this.queue=new int[data.length+1]; 4u;9J*r4
for(int i=0;i queue[++size]=data; */qtzt
fixUp(size); 4,Ic}CvM
} \nNXxTxX!
} dihjpI_
}yn0IWVa
private int size=0; kRJ4-n^@><
'9p@vi{\
private int[] queue; eV^d6T$
"r4AY
public int get() { D/ybFk
return queue[1]; [lzN !!B!
} op2Of<{h
F9"w6;hh
public void remove() { xM>W2
SortUtil.swap(queue,1,size--); _gj&$zP
fixDown(1); ;*TIM%6#
} 1/+C5Bp*
file://fixdown {$D,?V@%_
private void fixDown(int k) { >et-{(G
int j; =ac_,]z
while ((j = k << 1) <= size) { tC?=E#3V
if (j < size %26amp;%26amp; queue[j] j++; n: ui
if (queue[k]>queue[j]) file://不用交换 N?Q+>
break; yF}OfK?0f
SortUtil.swap(queue,j,k); #p(h]T32
k = j; Fxs;Fp
} ;ea]$9
} z;f2*F
private void fixUp(int k) { pIV-kI:w
while (k > 1) { olB)p$aH#
int j = k >> 1; &F:IIo7
if (queue[j]>queue[k]) \*hrW(
break; PX:'/{V
SortUtil.swap(queue,j,k); Ks^6.)
k = j; (_kp{0r#
} GE;e]Jkjn
} 'VyM{:8
Bs+(L [Z
} h` U?1xS
=uk0@hy9b
} NL=|z=q
C (n+SY^
SortUtil： J?@DGp+t
O4\Z!R60g
package org.rut.util.algorithm; EKEjv|_)
$EZN1\
import org.rut.util.algorithm.support.BubbleSort; _ nA p6i
import org.rut.util.algorithm.support.HeapSort; k(>h^
import org.rut.util.algorithm.support.ImprovedMergeSort; o./.Q9e7
import org.rut.util.algorithm.support.ImprovedQuickSort; y.5/?{GL
import org.rut.util.algorithm.support.InsertSort; }VS3L_ ;}/
import org.rut.util.algorithm.support.MergeSort; oF9 -&
import org.rut.util.algorithm.support.QuickSort; s4Sd>D7
import org.rut.util.algorithm.support.SelectionSort; KH)D08
import org.rut.util.algorithm.support.ShellSort; oVA?J%EK
N7'OPTKt&
/** Ds#/
* @author treeroot 1wzqGmjmt
* @since 2006-2-2 E#J';tUQ
* @version 1.0 Wt)Drv{@ {
*/ ;AR{@Fu.
public class SortUtil { #/"8F O%~p
public final static int INSERT = 1; WV3|?,y]qm
public final static int BUBBLE = 2; F|Mi{5G%
public final static int SELECTION = 3; ?]fF3SJk
public final static int SHELL = 4; 2XTPBZNe
public final static int QUICK = 5; bmNq[}
public final static int IMPROVED_QUICK = 6; 7{e{9QbJ4
public final static int MERGE = 7; H gTUy[(
public final static int IMPROVED_MERGE = 8; HX'FYt/?t
public final static int HEAP = 9; :q8b;*:
UNijFGi
public static void sort(int[] data) { =PRx?q`d
sort(data, IMPROVED_QUICK); $vHU$lZ/W
} Zfk*HV#\
private static String[] name={ R1nJUOE4w^
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" ]{"Br$
}; LmlXMia
E$W{8?:{
private static Sort[] impl=new Sort[]{ w%WF-:u7|
new InsertSort(), }X x(^Zh
new BubbleSort(), A(?\>X 9g
new SelectionSort(), 1(|D'y#
new ShellSort(), IG(?xf\C
new QuickSort(), X37L\e[c
new ImprovedQuickSort(), P\8@g U!uk
new MergeSort(), FX9F"42@
new ImprovedMergeSort(), SH*C"
new HeapSort() :[ k4Z]t8
}; +k dT(7
u@ jX+\
public static String toString(int algorithm){ W_m"ySQs
return name[algorithm-1]; g{W;I_P^9
} [SJ6@q
R@Gq)P9?
public static void sort(int[] data, int algorithm) { &] \X]p
impl[algorithm-1].sort(data); u0P)7~%
} .sQ=;w/ZA
R[49(>7H4
public static interface Sort { k>t)g-,2
public void sort(int[] data); "ZTTg>r
} | 8qBm
)o\jJrVDf
public static void swap(int[] data, int i, int j) { 'V8N
int temp = data; +?p.?I
data = data[j]; 4w#``UY)'
data[j] = temp; 3 ?Y|
} +C1QY'>I
} {]"]uT#