[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; 8jggc#.
} 5, -pBep<
int i1=l; wI! +L&Q
int i2=mid+1; t0e{|du
for(int cur=l;cur<=r;cur++){ ^+*GbY$'
if(i1==mid+1) hB?,7-
data[cur]=temp[i2++]; VJN/#
else if(i2>r) x^)g'16`
data[cur]=temp[i1++]; ^p 2.UW
else if(temp[i1] data[cur]=temp[i1++]; g={]Mzh
else 2"leUur~rO
data[cur]=temp[i2++]; 1Sg|3T8bGT
} f4'El2>-86
} {jOzap|
T+;H#&
} )C>}"#J>
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改进后的归并排序: 3J'73)y
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package org.rut.util.algorithm.support; 3cOY0Z#T
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import org.rut.util.algorithm.SortUtil; E+}GxFG-:
;GE26Ymqly
/** &@YFje6Lcm
* @author treeroot n .f4z<
* @since 2006-2-2 AozmO
* @version 1.0 @sw9A93A
*/ \fK47oV
public class ImprovedMergeSort implements SortUtil.Sort { |P~O15V*Q
GS ;HtUQ
private static final int THRESHOLD = 10; nTys4R
3s`V)aXP
/* =Kc|C~g
* (non-Javadoc) EqD^/(,L2
* j?:`-\w5
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ?}'N_n ys
*/ J?UA:u
public void sort(int[] data) { [)#u<lZ<~
int[] temp=new int[data.length]; /Jxq 3D)v
mergeSort(data,temp,0,data.length-1); m$fQ`XzU
} 9ZDVy7m\i-
N[qA2+e$Z
private void mergeSort(int[] data, int[] temp, int l, int r) { n1QEu"~Zj
int i, j, k; `d7gm;ykp
int mid = (l + r) / 2; s0cs'Rg
if (l == r) nJFk4v4:2
return; .E+OmJwD
if ((mid - l) >= THRESHOLD) |7 &|>
mergeSort(data, temp, l, mid); EKZA5J7kn
else |DN^NhtE
insertSort(data, l, mid - l + 1); Hf VHI1f
if ((r - mid) > THRESHOLD) )@}A r
mergeSort(data, temp, mid + 1, r); 9wL!D3e {Q
else tT;8r8@
insertSort(data, mid + 1, r - mid); j~Q}F|i8
.#*D!;f
for (i = l; i <= mid; i++) { t]s94 R q
temp = data; Ri|k<io
} ,H>W:O
for (j = 1; j <= r - mid; j++) { NW z9C=y
temp[r - j + 1] = data[j + mid]; sffhPX\I
} glv ;C/l
int a = temp[l]; (tepmcf
int b = temp[r]; oP/>ju
for (i = l, j = r, k = l; k <= r; k++) { SOVjEo4'3
if (a < b) { {'NBp0i
data[k] = temp[i++]; d]U`?A,
a = temp; R.K?
} else { PPEq6}
data[k] = temp[j--]; +A@m9
b = temp[j]; ;;:">@5
} 5J ySFG3
} _=pWG^a
} Nj+a2[
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/** AcKU^T+
* @param data B`i$Wt<7
* @param l le.anJAr
* @param i 69>/@<
*/ 6,X+1EXY
private void insertSort(int[] data, int start, int len) { 1Pm4.C)
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); x|8^i6xB
} 8) HBh7/
} 7'z(~3D
} p!_[qs
} n+2%tW
"Ht'{&
堆排序： P1MvtI4gm
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package org.rut.util.algorithm.support; [@//#}5v
6hO-H&r++
import org.rut.util.algorithm.SortUtil; &=X.*H%
>%u@R3PH]
/** |d[5l^6
* @author treeroot X3<K 1/<
* @since 2006-2-2 #AShbl jm+
* @version 1.0 PQ$sOK|/
*/ wjrG7*_Y4v
public class HeapSort implements SortUtil.Sort{ V4|uas{0I:
M*w'1fT
/* (non-Javadoc) h$`#YNd'
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) d`mD!)j
*/ Ke!'gohv
public void sort(int[] data) { BgM%+b8u
MaxHeap h=new MaxHeap(); k=$AhT=e}n
h.init(data); 3@_Elu
for(int i=0;i h.remove(); s3:9$.tiR[
System.arraycopy(h.queue,1,data,0,data.length); \9/RAY_G
} DN_W.o
0OnV0SIL
private static class MaxHeap{ ~W-cGb3c
u#@RM^738d
void init(int[] data){ p$Hi[upy
this.queue=new int[data.length+1]; rQb7?O@-
for(int i=0;i queue[++size]=data; '1Y\[T*
fixUp(size); eVJ^\z:4
} bWmw3w
} ?IF)+]
* ?]~ #
private int size=0; >P=Q #;v
d|lpec
private int[] queue; =n+ \\D
eTbg7"waA
public int get() { ,6{iT,~@8
return queue[1]; JeCg|@
} v-Qmx-N
wNYg$d0M
public void remove() { __Nv0Ru
SortUtil.swap(queue,1,size--); 69OF_/23
fixDown(1); E=$p^s
} 2YlH}fnH
file://fixdown esX)"_xf
private void fixDown(int k) { b?T
int j; t~hTp K*
while ((j = k << 1) <= size) { =r9r~SR#
if (j < size %26amp;%26amp; queue[j] j++; KC#/Z2A|<
if (queue[k]>queue[j]) file://不用交换 c{Ou^.yR
break; xfFg,9w8
SortUtil.swap(queue,j,k); gE])!GMM3
k = j; M{mSd2
} {A:j[
} :J/M,3
private void fixUp(int k) { NxA)@9Q
while (k > 1) { Hy_;nN+e
int j = k >> 1; ~ G6"3"
if (queue[j]>queue[k]) .iHn5SGA
break; >V$ Gx>I
SortUtil.swap(queue,j,k); ])}]/Qw
k = j; <hx+wrv
} t0)<$At6J
} [p;E~-S
[eUftr9&0
} fo0+dzazY
AUe# RP
} \tN-(=T
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SortUtil： 7.g[SBUOG
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package org.rut.util.algorithm; $?P22"/p
jE\Sm2G9
import org.rut.util.algorithm.support.BubbleSort; om h{0jA0
import org.rut.util.algorithm.support.HeapSort; 7U|mu~$.!
import org.rut.util.algorithm.support.ImprovedMergeSort; 0#cy=*E
import org.rut.util.algorithm.support.ImprovedQuickSort; ,yd=e}lQx
import org.rut.util.algorithm.support.InsertSort; _zWfI.o
import org.rut.util.algorithm.support.MergeSort; T0zn,ej
import org.rut.util.algorithm.support.QuickSort; \S~Vx!9w
import org.rut.util.algorithm.support.SelectionSort; .iD*>M:W
import org.rut.util.algorithm.support.ShellSort; !\Xm!I8
Tr0B[QF
/** 2L?!tBw?1
* @author treeroot i0jBZW"_1$
* @since 2006-2-2 Bi,;lR5
* @version 1.0 GH1"xR4!
*/ [`RX*OH2
public class SortUtil { s?R2B)a
public final static int INSERT = 1; u8GMUN
public final static int BUBBLE = 2; kOo~%kcQ'
public final static int SELECTION = 3; `;l.MZL!
public final static int SHELL = 4; .iX# A<E}
public final static int QUICK = 5; ?>"Yr,b?
public final static int IMPROVED_QUICK = 6; #~O b)q|
public final static int MERGE = 7; f"1>bW>R+
public final static int IMPROVED_MERGE = 8; *3/T;x.
public final static int HEAP = 9; ]n."<qxeT
::FS/Y]Fg
public static void sort(int[] data) { :>Rv!x`
sort(data, IMPROVED_QUICK); <Z}SKR"U%
} XxIHoX&
private static String[] name={ 3jB$2:#
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" YuZ"s55zU{
}; 3psU?8(
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private static Sort[] impl=new Sort[]{ 3"n\8#X{
new InsertSort(), ,L bBpi=TJ
new BubbleSort(), +l3=3
new SelectionSort(), 0sca4G0{
new ShellSort(), Bw%Qbs0Q
new QuickSort(), ,<BbpIQ2o
new ImprovedQuickSort(), *}k;L74|
new MergeSort(), ^sN (
new ImprovedMergeSort(), U8qtwA9t
new HeapSort() LI2&&Mw
}; JM1R ;i6
M])dJ9&e
public static String toString(int algorithm){ ;{h CF
return name[algorithm-1]; +6wiOHB`
} HK|ynBAo
$`R6=\|
public static void sort(int[] data, int algorithm) { Um#Wu]i
impl[algorithm-1].sort(data); PxH72hBS
} D?XM,l+
JRo?s~Ih
public static interface Sort { B#/Q'V
public void sort(int[] data); ;4N;D
} ;q N+^;,2
*HEuorl
public static void swap(int[] data, int i, int j) { >D201&*G%
int temp = data; L|bwZ,M=}?
data = data[j]; q[`j`8YY!R
data[j] = temp; b&1`NO
} jReXyRmo({
} Xp0F [>h