[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; G-xDN59K
} P"y`A}Bx
int i1=l; / ';0H_
int i2=mid+1; E9Np0M<
for(int cur=l;cur<=r;cur++){ zR1^I~ %
if(i1==mid+1) @z4*.S&tz
data[cur]=temp[i2++]; ;V*R*R
else if(i2>r) }XV+gyG=@
data[cur]=temp[i1++]; #(#Wv?r6
else if(temp[i1] data[cur]=temp[i1++]; Z&1T
else ysxb?6
data[cur]=temp[i2++]; ko.(pb@+
} V5sg#|&
} =j5MFX.-o
-Zf@VW,NI
} s+,OxRVw(
&]e'KdXF
改进后的归并排序: "?ucO4d
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package org.rut.util.algorithm.support; iYORu3
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import org.rut.util.algorithm.SortUtil; NdtB1b
Co (.:z~
/** Q&wB$*u
* @author treeroot C([phT;
* @since 2006-2-2 3L833zL
* @version 1.0 e+$p9k~
*/ *.sVr7=j
public class ImprovedMergeSort implements SortUtil.Sort { v0-cd
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private static final int THRESHOLD = 10; SM0~fAtE
tZ=E')!\
/* \ e\?I9
* (non-Javadoc) {QcLu"?c
* Qy^1*j<@&
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 4L ;% h
*/ WHsgjvh"
public void sort(int[] data) { E*.{=W }C
int[] temp=new int[data.length]; e,F1Xi#d
mergeSort(data,temp,0,data.length-1); k9:{9wW
} (]0%}$Fo
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private void mergeSort(int[] data, int[] temp, int l, int r) { NO|KVZ~
int i, j, k; iF-6Y0~8
int mid = (l + r) / 2; [Sr,h0h6
if (l == r) 8YZbP5'
return; U=DmsnD,
if ((mid - l) >= THRESHOLD) A )^`?m3
mergeSort(data, temp, l, mid); GN ]cDik
else ]ndvt[4L
insertSort(data, l, mid - l + 1); 9xO#tu]
if ((r - mid) > THRESHOLD) $ACvV"b
mergeSort(data, temp, mid + 1, r); iYDEI e
else [`{Z}q&
insertSort(data, mid + 1, r - mid); ,TXTS*V?
bvv|;6
for (i = l; i <= mid; i++) { xC*6vH]?
temp = data; T*#/^%HSG
} @ zs'Y8
for (j = 1; j <= r - mid; j++) { ,4zmb`dP<
temp[r - j + 1] = data[j + mid]; c_-drS
} }4Tc
int a = temp[l]; YVYu:}e3)
int b = temp[r]; $}J5xG,}$
for (i = l, j = r, k = l; k <= r; k++) { }Mf!-g
if (a < b) { BGOuDKz9C
data[k] = temp[i++]; :"=ez<t
a = temp; e\Y*F
} else { mz@T
data[k] = temp[j--]; RIb4!!',c
b = temp[j]; )-0kb~;|
} $nb[G$
} 3a?o3=
} p[hZ@f(z
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/** &xa(BX%,c
* @param data .q%WuQw
* @param l B8B; y^b>i
* @param i b4E:Wn9x
*/ Y' %^NP}o
private void insertSort(int[] data, int start, int len) { G?EoPh^m
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); (yF:6$:#
} zA$k0p
} E=e*VEjy
} l^|UCgRn
} Sz^ veh?
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堆排序： R_sr?V|"
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package org.rut.util.algorithm.support; E"+QJ~!
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import org.rut.util.algorithm.SortUtil; LXbP 2
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/** ^.1c{0Y^0
* @author treeroot 7on.4/;M
* @since 2006-2-2 ?Cl%{2omO
* @version 1.0 |K.mP4CKY
*/ Qa.<K{m#?
public class HeapSort implements SortUtil.Sort{ EQf[,
9[G[$c
/* (non-Javadoc) [x9KVd ^d
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 1+9W+$=h2
*/ POvP]G9'"
public void sort(int[] data) { Z8rvWH9
MaxHeap h=new MaxHeap(); Pa~)"u8
h.init(data); ~(Q)"s\1I
for(int i=0;i h.remove(); vg3=8>#
System.arraycopy(h.queue,1,data,0,data.length); W_kHj}dj,p
} =bHD#o|R
`glBV`?^
private static class MaxHeap{ @xbQYe%J
A9wh(P0\
void init(int[] data){ !q9+9 *6
this.queue=new int[data.length+1]; 2 dAB-d:k
for(int i=0;i queue[++size]=data; ~kZ G{
fixUp(size); T(t+ iv
} A<1hOSCz\
} n}'=yItVL1
vU767/
private int size=0; 95YL]3V
%]>KvoA
private int[] queue; pgOQIzu
AQ_|:
public int get() { 73xAG1D$r
return queue[1]; G*-b}f
} T;,cN7>>O
Cq'KoN%nQ
public void remove() { _>| =L W@7
SortUtil.swap(queue,1,size--); R~)\3] "2m
fixDown(1); @7?#Y|`
} DpUbzr41+k
file://fixdown #7MUJY+ 9
private void fixDown(int k) { KTP8?Q"n0
int j; "J4WzA%i
while ((j = k << 1) <= size) { Ed_N[I
if (j < size %26amp;%26amp; queue[j] j++; D'J0wT#
if (queue[k]>queue[j]) file://不用交换 CbwJd5tk
break; #wV8X`g
SortUtil.swap(queue,j,k); a'2$nbp}
k = j; B)qWtMZx
} k&,~qoU
} Q aS\(_
private void fixUp(int k) { 8=gjY\Dp
while (k > 1) { M+w=O!dq
int j = k >> 1; ptU\[Tq
if (queue[j]>queue[k]) *T5!{
break; w]]8dz
SortUtil.swap(queue,j,k); UPG9)aF
k = j; dHv68*^\'
} =~=*&I4Dp
} >[_f3;P
d4?Mi2/jF
} 22.8PO0
Bs O+NP
} wM2*#
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SortUtil： %O!v"Xh
%`&2+\`
package org.rut.util.algorithm; ,M^P!
l]8D7(g
import org.rut.util.algorithm.support.BubbleSort; m+lvl
import org.rut.util.algorithm.support.HeapSort; "x3lQ
import org.rut.util.algorithm.support.ImprovedMergeSort; )XYv}U
import org.rut.util.algorithm.support.ImprovedQuickSort; fSs4ZXC
import org.rut.util.algorithm.support.InsertSort; yF"1#{*y
import org.rut.util.algorithm.support.MergeSort; =y0C1LD+
import org.rut.util.algorithm.support.QuickSort; B2C$N0R#
import org.rut.util.algorithm.support.SelectionSort; JV]^zW
import org.rut.util.algorithm.support.ShellSort; OH">b6>\
?XA2&
/** Z yE `/J'
* @author treeroot DV<` K$ET
* @since 2006-2-2 cd$m25CxC
* @version 1.0 a{ ?`t|
*/ {TX]\ufG
public class SortUtil { 0@H|n^Md#
public final static int INSERT = 1; &NH$nY.r
public final static int BUBBLE = 2; m]5Cq6
public final static int SELECTION = 3; F.w5S!5Q
public final static int SHELL = 4; .HkL2m
public final static int QUICK = 5; ?TU}~}
public final static int IMPROVED_QUICK = 6; t.`@{R$hoA
public final static int MERGE = 7; `bZ/haU}A
public final static int IMPROVED_MERGE = 8; kw"SwdP5
public final static int HEAP = 9; r[lF<2&*R
E|6VX4`+
public static void sort(int[] data) { aVK3?y2
sort(data, IMPROVED_QUICK); D"ND+*Q[X
} b\-&sM(W"
private static String[] name={ f]JM /
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" K }Vv4x1U
}; FRg^c kb"
l}]t~!X=
private static Sort[] impl=new Sort[]{ 5[* qi?w=
new InsertSort(), ]dI2y=[!C
new BubbleSort(), w8Sp<6*
new SelectionSort(), 6P5Ih
new ShellSort(), ?34 e-
new QuickSort(), iVy7elT;R
new ImprovedQuickSort(), V`bi&1?6\
new MergeSort(), 5A sP5
new ImprovedMergeSort(), ,!7 H]4Qx
new HeapSort() 1e&QSzL
}; $`z)~6'
(UU(:/
public static String toString(int algorithm){ ]y,==1To
return name[algorithm-1]; rld67'KcE
} `<\1[HJ\
X&0 uI*r
public static void sort(int[] data, int algorithm) { RV5n,J
impl[algorithm-1].sort(data); uWM{JEOl
} 8;Yx<woR
fp[|M
public static interface Sort { 'J6 M*vO
public void sort(int[] data); D(h18
} YEj8S5"Su\
X!m9lV<
public static void swap(int[] data, int i, int j) { 20Z8HwQi
int temp = data; b#K:_ac5
data = data[j]; Lz:(6`S
data[j] = temp; { Fawt:
} ,)iKH]lY=
} $aN&nhoO<