[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; A!_yZ|)$T
} 20BU;D3
int i1=l; ap.L=vn
int i2=mid+1; BGL-lJrG
for(int cur=l;cur<=r;cur++){ d>`s+B9K0
if(i1==mid+1) Jgzg[6
data[cur]=temp[i2++]; h1QrFPQnu
else if(i2>r) 7j{63d`2
data[cur]=temp[i1++]; gib;> nuBK
else if(temp[i1] data[cur]=temp[i1++]; ]iH~1[
else x@,B))WlGr
data[cur]=temp[i2++]; .OvH<%g!.
} XbW 1`PH
} )E=~ _`XO
j{H,{x
} [7=?I.\Cr7
rPoq~p[Y
改进后的归并排序: N5@l[F7I
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package org.rut.util.algorithm.support; <FU1|
=_9grF-
import org.rut.util.algorithm.SortUtil; 4*_.m9{
$or8z2d1
/** 5^GrG|~
* @author treeroot qM0Df0$?x
* @since 2006-2-2 A&qZ:&(OM
* @version 1.0 l=ZX9<3
*/ JReJlDu
public class ImprovedMergeSort implements SortUtil.Sort { } !RBH(m%
};nOG;
private static final int THRESHOLD = 10; vo]$[Cp|4
}Uunlz<
/* Qon>[<]B
* (non-Javadoc) HT=-mwa_]
* 2)+ddel<Z
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) mu&%ph=
*/ N#4"P:Sv
public void sort(int[] data) { fk?(mxx"
int[] temp=new int[data.length]; !1ZrS
mergeSort(data,temp,0,data.length-1); B-EDVMu
} s%S; 9T
C;oT0(
private void mergeSort(int[] data, int[] temp, int l, int r) { >iFi~)i_4y
int i, j, k; `ouCQ]tKz
int mid = (l + r) / 2; Nd61ns(N
if (l == r) 5vqh09-FB
return; jmh$6 N% F
if ((mid - l) >= THRESHOLD) z)]Br1
mergeSort(data, temp, l, mid); Id40yER
else {,zn#hU.R
insertSort(data, l, mid - l + 1); 'mU7N<Q$qQ
if ((r - mid) > THRESHOLD) ,L9ioYbp
mergeSort(data, temp, mid + 1, r); C:<TJ
else 8YwSaBwO
insertSort(data, mid + 1, r - mid); p& +w
Tn(c%ytN
for (i = l; i <= mid; i++) { iP+3)
temp = data; V75P@jv5J
} *S{fyYyM
for (j = 1; j <= r - mid; j++) { xBKis\b
temp[r - j + 1] = data[j + mid]; /&g~*AL
} dI$M9;
int a = temp[l]; R}Z2rbt
int b = temp[r]; |;(0]
for (i = l, j = r, k = l; k <= r; k++) { 6`sS8Ar&u
if (a < b) { |GnqfD
data[k] = temp[i++]; +C){&/=#
a = temp; u(Y?2R
} else { Y SD|#0
data[k] = temp[j--]; 4WZ"8
b = temp[j]; O2C&XeB:4
} $z*Y:vFP
} P`!31P#]L
} kC4}@{4i
m #}%l3$
/** (SGU]@)g
* @param data rk .tLk
* @param l Z^SF $+UN
* @param i !_#2$J*s^D
*/ ;$$.L bb8
private void insertSort(int[] data, int start, int len) { 9a lMC
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); ;ZowC#j
} f<v:Tg.[
} J}37 9
} bO\E)%zp
} a>XlkkX
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堆排序： m*Q*{M_e
bf1EMai"
package org.rut.util.algorithm.support; "fX9bh^
m03]SF(#3
import org.rut.util.algorithm.SortUtil; 7z^\}&
RYem(%jq
/** Z/w "zCd
* @author treeroot x;p7n2_
* @since 2006-2-2 -P7JaH/Q
* @version 1.0 [Uw/;Kyh
*/ hj|P*yKV
public class HeapSort implements SortUtil.Sort{ sJq^>"|J
RbGq$vYol/
/* (non-Javadoc) &['cZ/bM
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) @Ap~Wok
*/ [ bB
public void sort(int[] data) { Dhy@!EOS
MaxHeap h=new MaxHeap(); vgvJ6$#
h.init(data); K\a=bA}DG
for(int i=0;i h.remove(); 8KhE`C9z
System.arraycopy(h.queue,1,data,0,data.length); `oUuAL
} mhZ60RW
{Mx3G*hr
private static class MaxHeap{ 8O0E;6b
-^+!:0';
void init(int[] data){ =& .KKr
this.queue=new int[data.length+1]; [$[1|r *Q
for(int i=0;i queue[++size]=data; ^jxV
fixUp(size); `(@}O?w!1
} u#uT|a.
} F1aI4H<(T
%qj8*1
private int size=0; X=U>r
g<&n V>wF
private int[] queue; -p\uW0XA
}HC6m{vH(
public int get() { +{F2hEYP
return queue[1]; vPbmQh ex
} 3 2MdDa
bQFMg41*w7
public void remove() { mzkv/
SortUtil.swap(queue,1,size--); rp^Gk
fixDown(1); <>tQa5;
} \uTy\KA
file://fixdown 4Cl41a
private void fixDown(int k) { O)E8'Oe"Q
int j; [ijK~
while ((j = k << 1) <= size) { /degBL+
if (j < size %26amp;%26amp; queue[j] j++; UZ` <D/
if (queue[k]>queue[j]) file://不用交换 +^\TG>le
break; 1ehl=WN
SortUtil.swap(queue,j,k); t'pY~a9F
k = j; ]&mN~$+C
} uO,9h0y0W
} E,nxv+AQ
private void fixUp(int k) { q;<=MO/
while (k > 1) { m5/d=k0l
int j = k >> 1; B"rfR_B2M#
if (queue[j]>queue[k]) f8c'`$O
break; _R 6+bB$
SortUtil.swap(queue,j,k); 6bXR?0$*M.
k = j; ToVi;
} ;&N=t64"
} vL,:Yn@b
WFTXSHcG
} yaD_c;
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} 3r]:k)J
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SortUtil： ,4&?`Q
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package org.rut.util.algorithm; QxaW x
g} /efE
import org.rut.util.algorithm.support.BubbleSort; V{yP/X
import org.rut.util.algorithm.support.HeapSort; WE|-zo
import org.rut.util.algorithm.support.ImprovedMergeSort; 6yN8(&`
import org.rut.util.algorithm.support.ImprovedQuickSort; #2~-I
import org.rut.util.algorithm.support.InsertSort; th?w&;L
import org.rut.util.algorithm.support.MergeSort; E1&9( L5
import org.rut.util.algorithm.support.QuickSort; 4%s6 d,6"
import org.rut.util.algorithm.support.SelectionSort; p]-\\o}
import org.rut.util.algorithm.support.ShellSort; 7|/Ct;oO:
f=L&>X
/** Q*J8`J:#^R
* @author treeroot ~5Cid)Q}@o
* @since 2006-2-2 &Is}<Ew
* @version 1.0 &Oih#I
*/ VoTnm
public class SortUtil { bz1+AJG
public final static int INSERT = 1; kU {>hG4
public final static int BUBBLE = 2; 5@kNvi
public final static int SELECTION = 3; ZVin+z
public final static int SHELL = 4; +6$|No
public final static int QUICK = 5; ls928
public final static int IMPROVED_QUICK = 6; |v6kZ0B<
public final static int MERGE = 7; 3m#/1=@o
public final static int IMPROVED_MERGE = 8; ^z%ShmM&LZ
public final static int HEAP = 9; b,tf]Z-
Ww[Xqmg
public static void sort(int[] data) { P,}cH;w6Ck
sort(data, IMPROVED_QUICK); fUg<+|v*
} 5>e#SW
private static String[] name={ DQ86(4e*g#
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" S1Nwm?z
}; pmIOV~K
{|E'
private static Sort[] impl=new Sort[]{ 7^2
new InsertSort(), O_kBAC-|R(
new BubbleSort(), 26&$vgO~:
new SelectionSort(), oE H""Bd
new ShellSort(), UCz\SZ{za
new QuickSort(), }^@Q9<P^E
new ImprovedQuickSort(), iaAj|:
new MergeSort(), IOjp'6Yr
new ImprovedMergeSort(), iiw\
new HeapSort() y$Rr,]L
}; VPh0{(O^=
;Eer
public static String toString(int algorithm){ V8Fp1?E9S
return name[algorithm-1]; @X?7a]+;8
} OABMIgX
?DwI>< W
public static void sort(int[] data, int algorithm) { 4Ucs9w3[
impl[algorithm-1].sort(data); aJ{-m@/5
} e}u68|\EC
Hrk]6*
public static interface Sort { \|gE=5!Am=
public void sort(int[] data); z[0+9=<Y
} <0w"$.K#3
cR*5iqA
public static void swap(int[] data, int i, int j) { @BfJb[A#
int temp = data; :< d.
data = data[j]; I0qSx{K
data[j] = temp; 0'QX*xfa>
} d5z=fH9
} XsXO S8