[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; KZsSTB6J
} {CYFM[V
int i1=l; yLipuMNV
int i2=mid+1; $l7 <j_C
for(int cur=l;cur<=r;cur++){ *=UEx0_!q
if(i1==mid+1) OiJ1&Fz(
data[cur]=temp[i2++]; &5~bJ]P
else if(i2>r) ,K,n{3]
data[cur]=temp[i1++]; !1-:1Whz8
else if(temp[i1] data[cur]=temp[i1++]; '<4/Md[
else FJ}/g ?
data[cur]=temp[i2++]; x_s9DkX
} [;83 IoU}
} `>g: :
_~-VH&g0R
} P9SyQbcK
5ju\!Re3X
改进后的归并排序: =Pd3SC})6V
rcY[jF
package org.rut.util.algorithm.support; [8l8m6
vRVQ:fw
import org.rut.util.algorithm.SortUtil; H+;>>|+:~
#q6jE
/** _ ?xORzO
* @author treeroot ?R#-gvX%
* @since 2006-2-2 @m<xpel
* @version 1.0 !J3g,p*
*/ <;=?~QK%-
public class ImprovedMergeSort implements SortUtil.Sort { W(9-XlYKE
QZYD;&iY&
private static final int THRESHOLD = 10; Nd%,V
.?@$Rd2@W
/* j_j~BXhIS
* (non-Javadoc) i%:oO KI
* s1?N&t8c
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) }c:s+P+/
*/ [yW0U:m
public void sort(int[] data) { X8GIRL)lJ
int[] temp=new int[data.length]; )8!""n~
mergeSort(data,temp,0,data.length-1); K\,)9:`t
} dE%rQE7'
g-bHf]'
private void mergeSort(int[] data, int[] temp, int l, int r) { zr-HL:js
int i, j, k; es6!p 7p?
int mid = (l + r) / 2; }[ld=9p(
if (l == r) {M)Y6\v
return; a[1^)=/DM
if ((mid - l) >= THRESHOLD) 5.q2<a :
mergeSort(data, temp, l, mid); |p-, B>p!
else to|O]h2*U2
insertSort(data, l, mid - l + 1); %}J[EV
if ((r - mid) > THRESHOLD) Vof[yL `
mergeSort(data, temp, mid + 1, r); [h {zT)[
else 2ed$5.D
insertSort(data, mid + 1, r - mid); p$`71w)'[
[sy~i{Bm
for (i = l; i <= mid; i++) { 0L S,(v4
temp = data; 3-`IMNn!
} ; {iX_%
for (j = 1; j <= r - mid; j++) { h.l^f>,/
temp[r - j + 1] = data[j + mid]; [U5[;BNRD
} |k\4\aLj
int a = temp[l]; _)"-zbh}{
int b = temp[r]; SDwTGQ/0
for (i = l, j = r, k = l; k <= r; k++) { ^KM' O8
if (a < b) { wDVKp['
data[k] = temp[i++]; bC{}&a
a = temp; >7V96jL$Y
} else { ^Vso`(Ss
data[k] = temp[j--]; !KKkw4
b = temp[j]; =\"88e;b2
} V|gW%Z,j
} >B!E 6ah
} ,.A@U*j
="Zr.g~8
/** W8z4<o[$
* @param data 2!Yq9,`
* @param l a\pOgIp
* @param i 'y[74?1
*/ ($pNOGH
private void insertSort(int[] data, int start, int len) { ;|}N\[fk%]
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); K!Te*?b
} 2Tec#eYe
} L-? ?%_=
} zkt`7Pg;J
} v[{g"C
}E0~'
堆排序： :tBIo7
!}[}YY?',i
package org.rut.util.algorithm.support; [% \>FT[
(0dy,GRN
import org.rut.util.algorithm.SortUtil; ABb,]%
>'ev_eAk
/** "\cDSiD
* @author treeroot R/ix,GC
* @since 2006-2-2 CT1@J-np
* @version 1.0 '9@S
*/ p!B&&)&db
public class HeapSort implements SortUtil.Sort{ v3PtiKS
`@TWZ%f6
/* (non-Javadoc) d9e_slx
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Kh&W\\K
*/ 'K&^y%~py,
public void sort(int[] data) { VRU"2mQ.P6
MaxHeap h=new MaxHeap(); d!0iv'^t
h.init(data); ~tx|C3A`d
for(int i=0;i h.remove(); i^T@jg+K
System.arraycopy(h.queue,1,data,0,data.length); D+m#_'ocL
} _/V<iv
(KxI*
private static class MaxHeap{ C# zYZ JZ
)l?1dR:sP
void init(int[] data){ 2tD{c^ 9<
this.queue=new int[data.length+1]; ~wYGTm=(n
for(int i=0;i queue[++size]=data; x3DUz
fixUp(size); ,2oFt\`.r
} 3r^Ls[ey
} S!WG|75B
#O 2g]YH
private int size=0; "o_s=^U
y_mTO4\C2
private int[] queue; X})5XYvA*
^Gi9&fS,
public int get() { 3PkVMX
return queue[1]; Znr6,[U+q
} wnUuoX(
,5V w^@F
public void remove() { |"}oGL6-
SortUtil.swap(queue,1,size--); MrjgV+P}[
fixDown(1); 5"sd
} CWT#1L=
file://fixdown ]2E#P.-!b
private void fixDown(int k) { mR,w~wP
int j; {E=BFs
while ((j = k << 1) <= size) { $, hHR:
if (j < size %26amp;%26amp; queue[j] j++; zUuOX5-6x
if (queue[k]>queue[j]) file://不用交换 gGZ-B<
break; 5 EhOvt8
SortUtil.swap(queue,j,k); 3JYhF)G
k = j; :1asY:)vNP
} B(|*u
} @TJxU
private void fixUp(int k) { tTEw"DL_-
while (k > 1) { =csh=V@s
int j = k >> 1; H4B|c42
if (queue[j]>queue[k]) F$/7X~*
break; f \ E9u}
SortUtil.swap(queue,j,k); B]2m(0Y>>v
k = j; <+y%k~("
} Es<& 6
} ;*%3J$T+
,J6t 1V
} YCl&}/.pA
E)3Ah!
} e5AZU7%.
\LG0
SortUtil： IA%|OVAfF
:o3>
package org.rut.util.algorithm; p=!12t
[]lMv ZW
import org.rut.util.algorithm.support.BubbleSort; L"KKW c
import org.rut.util.algorithm.support.HeapSort; knfEbH
import org.rut.util.algorithm.support.ImprovedMergeSort; ?e{hidg
import org.rut.util.algorithm.support.ImprovedQuickSort; nsL"'iQ
import org.rut.util.algorithm.support.InsertSort; 2Tp@;[!3
import org.rut.util.algorithm.support.MergeSort; 5GK> ~2c(
import org.rut.util.algorithm.support.QuickSort; 'XJqh|G
import org.rut.util.algorithm.support.SelectionSort; LZtO Q__B)
import org.rut.util.algorithm.support.ShellSort; E"%dO
|LV}kG(2
/** *I:a\o~$[
* @author treeroot )\KU:_l
* @since 2006-2-2 FuC#w 9_
* @version 1.0 mzf~qV^T
*/ mE\)j*Nnv
public class SortUtil { &=*sN`
public final static int INSERT = 1; R$h B9BK
public final static int BUBBLE = 2; 2c*w{\X
public final static int SELECTION = 3; / Q| Z&-c
public final static int SHELL = 4; B?%e-xV-
public final static int QUICK = 5; \@[Y~:
public final static int IMPROVED_QUICK = 6; buldA5*!o
public final static int MERGE = 7; R]&lVXyH
public final static int IMPROVED_MERGE = 8; `h%K8];<6f
public final static int HEAP = 9; 6t\0Ui
G%A!yV
public static void sort(int[] data) { a[VX)w_W{
sort(data, IMPROVED_QUICK); cYgd1
} 9!_JV;2
private static String[] name={ r^7eK)XA_
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" _z=ytt9D
}; YEa<zhO8
B/*\Ih9y
private static Sort[] impl=new Sort[]{ 9Y:Iha`$w
new InsertSort(), L\hid/NL
new BubbleSort(), W(}2R>$
new SelectionSort(), b*(,W
new ShellSort(), -x{@D{Q%
new QuickSort(), ,. zHG
new ImprovedQuickSort(), I`77[
new MergeSort(), `_()|;!y
new ImprovedMergeSort(), o)f$ 7.
new HeapSort() oI5^.Dr FW
}; `>4"i+NFF8
e?7y$H-
public static String toString(int algorithm){ :qc?FQ ;
return name[algorithm-1]; ( Sjlm^bca
} z}Lf]w?
Y[N@ )E_G
public static void sort(int[] data, int algorithm) { Q#F9&{'l
impl[algorithm-1].sort(data); Aj8zFt]
} }hE!0q~MfM
/PVx
public static interface Sort { U2)?[C1q{
public void sort(int[] data); 5yyc0UG
} F}.R-j#
;}lsD1S:
public static void swap(int[] data, int i, int j) { J%]5C}v \
int temp = data; 1#3eY?Nb
data = data[j]; K]1|#`n
data[j] = temp; n&!q9CR`
} ~Ede5Vg!!2
} #@' B\!<@=