[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; Gc'HF"w
} *M*k-Z':.*
int i1=l; ^Z!W3q Q
int i2=mid+1; 0jXIx2y
for(int cur=l;cur<=r;cur++){ @MM|.# ~T
if(i1==mid+1) `{/=i|6
data[cur]=temp[i2++]; J+zqu
else if(i2>r) |qr[*c3$1
data[cur]=temp[i1++]; v/.2Z(sZ
else if(temp[i1] data[cur]=temp[i1++]; p.%$
else ,9rT|:N
data[cur]=temp[i2++]; xv2;h4{<
} yZ 9 *oDs
} J kA~Ol
MMf6QxYf
} {ys_uS{c*
>GcFk&x
改进后的归并排序: 'i,<j s3\f
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package org.rut.util.algorithm.support; @6gz) p
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import org.rut.util.algorithm.SortUtil; l]ZUKy
uJWX7UGuz
/** i et|\4A
* @author treeroot i2*nYd`K
* @since 2006-2-2 jfWIPN
* @version 1.0 ?>&8,p17
*/ ABSeX
public class ImprovedMergeSort implements SortUtil.Sort { x:2_FoQ
QdRMp n}q
private static final int THRESHOLD = 10; Ik,w3}*P*
j]P|iL
/* xs:{%ki
* (non-Javadoc) N\0Sq-.
* 7#&sG
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) R|vF*0)>W
*/ "Vh(%N`6
public void sort(int[] data) { #4Z$O(
int[] temp=new int[data.length]; |joGrWv4
mergeSort(data,temp,0,data.length-1); eDm,8Se
} L{=z}QO
#K[ @$BY:
private void mergeSort(int[] data, int[] temp, int l, int r) { #:yZJS9f9
int i, j, k; [L275]4n!]
int mid = (l + r) / 2; }[Y):Yy
if (l == r) CV6H~t'1
return; SX4p(t
if ((mid - l) >= THRESHOLD) I@\{6hw
mergeSort(data, temp, l, mid); ANNL7Z3C
else zb4g\H 0
insertSort(data, l, mid - l + 1); V^ :\/EU
if ((r - mid) > THRESHOLD) !F8 !]"*
mergeSort(data, temp, mid + 1, r); ygPZkvZ
else iaC$K@a{
insertSort(data, mid + 1, r - mid); l>]M^=,&7
-lp_~)j^
for (i = l; i <= mid; i++) { f]lDJ?+ M
temp = data; r~;N(CG
} (y36NH+
for (j = 1; j <= r - mid; j++) { #i,O "`4
temp[r - j + 1] = data[j + mid]; @X#m]ou
} %{{#Q]]&
int a = temp[l]; NX;&V7
int b = temp[r]; 5Q88OxH
for (i = l, j = r, k = l; k <= r; k++) { `MD/CFl4
if (a < b) { E%'DIs
data[k] = temp[i++]; ,i|f8pZ
a = temp; 5YCbFk^
} else { okv7@8U#p
data[k] = temp[j--]; M]'AA Uo8
b = temp[j]; }>w; +XU
} NplSkv
} 2V]2jxOQ
} OTm`i>rB
7^L&YVW
/** 7Av]f3Zr
* @param data $Yka\tS'
* @param l %F~ dmA#:
* @param i #&Ee5xM=
*/ ^#o.WL%4/B
private void insertSort(int[] data, int start, int len) { (}:xs,Ax
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); B]vj1m`9
} q mB@kbt
} ,aJrN!fzU
} $d"+Njd
} { \ePJG#
?]z ._I`E
堆排序： <wC1+/]
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package org.rut.util.algorithm.support; pr"flRQr#
FuKNH~MevQ
import org.rut.util.algorithm.SortUtil; eG v"&kr
=N c`hP
/** H[r0jREK
* @author treeroot Pz 'Hqvd
* @since 2006-2-2 )B_h"5X4\y
* @version 1.0 *"ShE=\p
*/ |>4{4
public class HeapSort implements SortUtil.Sort{ `Nn?G
YO,ldsSz|r
/* (non-Javadoc) O^#u%/
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) s<b7/;w'
*/ #7=LI\
public void sort(int[] data) { `2PT 8UM
MaxHeap h=new MaxHeap(); .yPx'_e
h.init(data); yH^*Fp8V
for(int i=0;i h.remove(); TE~@Bl;{?c
System.arraycopy(h.queue,1,data,0,data.length); jH1~Ve+q9
} t3G'x1
;"Y6&YP<
private static class MaxHeap{ In&vh9Lw
bG)MG0<TT
void init(int[] data){ %Qq)=J<H;
this.queue=new int[data.length+1]; =&b[V"
for(int i=0;i queue[++size]=data; Y>~JI;Cu`
fixUp(size); t^hkGYj!2
} DF2&j!
} j&.BbcE45
:(Bi{cw
private int size=0; 7w,FA
lQ"i]};<D
private int[] queue; ub5hX{uT
}c%y0)fL
public int get() { Ziimz}WHF
return queue[1]; `@7tWX0
} GwBQ pNjy
9DX3]Z\7X
public void remove() { +ctv]'P_
SortUtil.swap(queue,1,size--); 7`HUwu
fixDown(1); HU9y{H
} /MH@>C _
file://fixdown kB#vh
private void fixDown(int k) { +;;%Atgn
int j; B_glyC
while ((j = k << 1) <= size) { A#&qoZ(C
if (j < size %26amp;%26amp; queue[j] j++; 79H+~1Az
if (queue[k]>queue[j]) file://不用交换 Q%Q?q)x
break; (L%q/$
SortUtil.swap(queue,j,k); T0%TeFY
k = j; ]bb}[#AY
} ]xEE7H]\h
} E2'e}RQ
private void fixUp(int k) { pIiED9
while (k > 1) { F t/ x5
int j = k >> 1; [nIG_j>D-f
if (queue[j]>queue[k]) =pyZ^/}P
break; c0q)
SortUtil.swap(queue,j,k); Ml?)Sc"\7
k = j; q- (NZno
} jMui+G(h
} 1Z8Oh_DC
lFGxW 5
} )=nPM`Jn.
5'Jh2r
} EZQ+HECpK
cjC6\.+l3
SortUtil： u%T$XG
9w;J7jgOT!
package org.rut.util.algorithm; I7z/GA\x
umZ g}|C_
import org.rut.util.algorithm.support.BubbleSort; c_$&Uii
import org.rut.util.algorithm.support.HeapSort; np\2sa`
import org.rut.util.algorithm.support.ImprovedMergeSort; 8t:&#h
import org.rut.util.algorithm.support.ImprovedQuickSort; k5QD5/Ej
import org.rut.util.algorithm.support.InsertSort; ?J@qg20z
import org.rut.util.algorithm.support.MergeSort; " IkF/
import org.rut.util.algorithm.support.QuickSort; <`j[;>O
import org.rut.util.algorithm.support.SelectionSort; |z.GSI_!)
import org.rut.util.algorithm.support.ShellSort; I= h4s(
iSz@E&[X
/** W$Q)aA7
* @author treeroot 3k*:B~1
* @since 2006-2-2 w[7.@%^[
* @version 1.0 |+xtFe
*/ A='+tJa
public class SortUtil { dF11Rj,~ 8
public final static int INSERT = 1; UoMWn"ZE
public final static int BUBBLE = 2; P,;b'-5C
public final static int SELECTION = 3; LF)a"Sh
public final static int SHELL = 4; !QR?\9`
public final static int QUICK = 5; ]RXtC*
public final static int IMPROVED_QUICK = 6; T19rbL_
public final static int MERGE = 7; $K.%un Gm
public final static int IMPROVED_MERGE = 8; >+jbMAYSq
public final static int HEAP = 9; eIUuq&(
UG"6RW @
public static void sort(int[] data) { 5Jhbf2-
sort(data, IMPROVED_QUICK); k CW!m
} SXo[[ao
private static String[] name={ 9p\Hx#^
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" @6YBK+"
}; ?F87C[o
<% 7P
private static Sort[] impl=new Sort[]{ 2^^'t6@
new InsertSort(), /pIb@:Y1?
new BubbleSort(), Fi?Q 4b
new SelectionSort(), mU3Y)
new ShellSort(), h%1~v$W`
new QuickSort(), `gt&Y-
new ImprovedQuickSort(), qaMZfA
new MergeSort(), ~ACP%QM=
new ImprovedMergeSort(), wCU&Xb$F
new HeapSort() J|"nwY}a9
}; fY%M=,t3c
3Zaq#uA
public static String toString(int algorithm){ ]D?# \|
return name[algorithm-1]; VM!-I8t
} |z#m
KcmDF4C2
public static void sort(int[] data, int algorithm) { }c35FM,
impl[algorithm-1].sort(data); u 5Eo
} k_K,J6_)
$#G6m`V
public static interface Sort { > h,y\uV1
public void sort(int[] data); y|e2j&m
} 4V228>9w
JtYYT/PB
public static void swap(int[] data, int i, int j) { Wkg*J3O
int temp = data; 5?3Isw`v2
data = data[j]; nIV.9#~&
data[j] = temp; pYLY;qkG"
} #aitESbT
} ;Na8_}