[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; #SY8Zv
} X7kJWX
int i1=l; ;>=hQC{f>
int i2=mid+1; |Sg *j-.
for(int cur=l;cur<=r;cur++){ K*J8(/WkD
if(i1==mid+1) oWyg/{M
data[cur]=temp[i2++]; $52Te3n
else if(i2>r) RCt)qh+
data[cur]=temp[i1++]; @"9y\1u
else if(temp[i1] data[cur]=temp[i1++]; e,E;\x &
else ^a`zvrE v
data[cur]=temp[i2++]; Xi5kE'_
} [ hj|8)
} w8%yX$<
F *; +-e
} +ZXGT
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改进后的归并排序: whNRUOK:
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package org.rut.util.algorithm.support; dh/:H/k kR
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import org.rut.util.algorithm.SortUtil; M O5fu!
}jd[>zk
/** eEsEW<su
* @author treeroot 9szE^kHS9
* @since 2006-2-2 )I+1 b !U
* @version 1.0 SU# S'
*/ V`69%35*@
public class ImprovedMergeSort implements SortUtil.Sort { mUy/lo'4
Ao96[2U6
private static final int THRESHOLD = 10; jn\\,n"6
JXj`
/* ^ +{ ~ ^y7
* (non-Javadoc) 7\ff=L-b
* }VR&*UJE
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) M _U$I7
*/ BHj]w*Ov
public void sort(int[] data) { F__>`Dol
int[] temp=new int[data.length]; mS~3QV
mergeSort(data,temp,0,data.length-1); o\]e}+1[o
} J=K3S9:n]g
b&~uK"O'7d
private void mergeSort(int[] data, int[] temp, int l, int r) { #Mbt%m
int i, j, k; !^axO
int mid = (l + r) / 2; #bu`W!p}
if (l == r) mKpUEJ<a
return; D~f.)kkC4
if ((mid - l) >= THRESHOLD) .M>u:,v
mergeSort(data, temp, l, mid); RAE|eTnna
else Q X@&~
insertSort(data, l, mid - l + 1); j{_MDE7N
if ((r - mid) > THRESHOLD) M/V >25`
mergeSort(data, temp, mid + 1, r); `ss]\46>
else NkO$ M
insertSort(data, mid + 1, r - mid); (f#W:]o/
LO"HwN43h
for (i = l; i <= mid; i++) { `"ie57-
temp = data; A94VSUDA:
} .h+<m7
for (j = 1; j <= r - mid; j++) { YSrFHVq
temp[r - j + 1] = data[j + mid]; ObM5vrEk|
} l"*>>/U k
int a = temp[l]; jMp{
int b = temp[r]; O1#rCFC|y
for (i = l, j = r, k = l; k <= r; k++) { E#ys-t 42
if (a < b) { g"Ii'JZ?
data[k] = temp[i++]; T[Gz
a = temp; M.OWw#?p:_
} else { tb=L+WAIw
data[k] = temp[j--]; <K\F/`c
b = temp[j]; zV80r+y
} v>R.M"f
} gwqK`ww
} Osy5|Ts
SiBbz4
/** 9hguC yr@h
* @param data fGe{7p6XV*
* @param l U_8I$v-~
* @param i 8c/Ii"1
*/ 6nq.~f2`
private void insertSort(int[] data, int start, int len) { AT9SD vJ
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); Y-{spTI
} AMm O+E?
} ih;TQ!c+b
} RCX4;,DHx
} Bpp9I;)c
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堆排序： hBqu,A
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package org.rut.util.algorithm.support; e.kt]l
6FmgK"t8
import org.rut.util.algorithm.SortUtil; $ta#]>{
V9bLm,DtT
/** 2M1mdkP3
* @author treeroot mT9\%5d3
* @since 2006-2-2 1&As:kv5I
* @version 1.0 lyeoSd1AN
*/ f:0n-me
public class HeapSort implements SortUtil.Sort{ x}[` -
$3Ia+O
/* (non-Javadoc) .WPqK>79|
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) #lC{R^SL
*/ =w8 YZs8w
public void sort(int[] data) { U Oo(7
MaxHeap h=new MaxHeap(); cA\W|A)
h.init(data); ZM.g+-9
for(int i=0;i h.remove(); 6;*(6$;
System.arraycopy(h.queue,1,data,0,data.length); `7A@\Ha3
} ,m8*uCf
X9j+$X\j
private static class MaxHeap{ ]*h}sn=
*S4P'JSY
void init(int[] data){ |{K:.x#^
this.queue=new int[data.length+1]; iE`aGoA
for(int i=0;i queue[++size]=data; J_@4J7
fixUp(size); \#r_H9&s6
} C=cTj7Ub
} g-}sVvM
M[{:o/]<
private int size=0; DPx,qM#h5O
OEW,[d
private int[] queue; ~4<3`l=A
mg(56)
public int get() { eV0S:mit
return queue[1]; MvmP["%J4_
} . 6dT5x8u
WV U9NmvE
public void remove() { Se8y-AL6x>
SortUtil.swap(queue,1,size--); y~jIAp
fixDown(1); sD+G+
} ^nF$<#a
file://fixdown BkfBFUDQ
private void fixDown(int k) { GcCs}(eo
int j; [#Vr)\n
while ((j = k << 1) <= size) { $"{3i8$3mT
if (j < size %26amp;%26amp; queue[j] j++; :t^})%
if (queue[k]>queue[j]) file://不用交换 ""^BW Re D
break; y3]"H(
SortUtil.swap(queue,j,k); Qu_T&
k = j; VAE?={-
} MA#!<b('
} G\ZRNb
private void fixUp(int k) { |l(lrJ{
while (k > 1) { E(_I3mftm
int j = k >> 1; oZ:F3 GQ4Q
if (queue[j]>queue[k]) b.*4RL
break; ,z)NKt#
SortUtil.swap(queue,j,k); R}9jgB
k = j; <h51KPo^P
} r.^X>?
} E]?HCRa5R
!!%nl_I(
} }zxh:"#K
<9tG_
} Q]UYG(
E*CQG;^=N
SortUtil： @~G`~8
4$GRCq5N;
package org.rut.util.algorithm; v^_]W3K
G$9|aaf`1#
import org.rut.util.algorithm.support.BubbleSort; @SG"t,5s
import org.rut.util.algorithm.support.HeapSort; jI<WzvhYG
import org.rut.util.algorithm.support.ImprovedMergeSort; [Ms{J!^q
import org.rut.util.algorithm.support.ImprovedQuickSort; dS_)ll.6z
import org.rut.util.algorithm.support.InsertSort; ^-*Tn
import org.rut.util.algorithm.support.MergeSort; y"L`bl A9}
import org.rut.util.algorithm.support.QuickSort; *Q120R
import org.rut.util.algorithm.support.SelectionSort; ff./DMDafI
import org.rut.util.algorithm.support.ShellSort; h]DECd{
Is6 _
/** a;T[%'in
* @author treeroot #33RhJu5,
* @since 2006-2-2 ^*ezj1
* @version 1.0 VD&3%G!
*/ 9`n)"r
public class SortUtil { "mK i$FV
public final static int INSERT = 1; N?{1'=Om
public final static int BUBBLE = 2; |-Esc|J(
public final static int SELECTION = 3; yO,`"Dc_0
public final static int SHELL = 4; ?r E]s!K
public final static int QUICK = 5; OPt;G,$ta
public final static int IMPROVED_QUICK = 6; dtnet_j
public final static int MERGE = 7; HGQ?(2]8$
public final static int IMPROVED_MERGE = 8; >aC\_Mc
public final static int HEAP = 9; Ar7mH4M
,\9mAt1O
public static void sort(int[] data) { VMye5 P
sort(data, IMPROVED_QUICK); 3)c K*8#
} /b:t;0G
private static String[] name={ =Pb5b6Y@6
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" O][Nl^dl
}; Xz.Y-5)
PSf5p\<5
private static Sort[] impl=new Sort[]{ $FusDdCv3
new InsertSort(), P&%eIgAOL
new BubbleSort(), /sT ^lf=
new SelectionSort(), ,WB_C\.#XN
new ShellSort(), vG<pc_ak
new QuickSort(), d1TdH s\
new ImprovedQuickSort(), ?X#/1X%u:
new MergeSort(), lHKf#|
new ImprovedMergeSort(), k8 ;uC~L
new HeapSort() 4`U0">gY
}; +fd@K
Gkv~e?Kc~^
public static String toString(int algorithm){ T4~`e_
return name[algorithm-1]; LZc$:<J<6
} .-KtB(t
v"~Do+*+
public static void sort(int[] data, int algorithm) { 6vgBqn[
impl[algorithm-1].sort(data); Zv|p>q`R2
} Z<ajET`)
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public static interface Sort { BU9J_rCIv
public void sort(int[] data); GjeUUmr
} n|x$vgb
?AnjD8i
public static void swap(int[] data, int i, int j) { Q'|0?nBOY
int temp = data; gE@$~Q>M
data = data[j]; xEVLE,*?>
data[j] = temp; @q&|MMLt
} Zn@W7c,_I
} h@~:(:zU$