[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; 7'g'qUW+~
} byz2u
int i1=l; ,f ..46G
int i2=mid+1; {[~cQgCI
for(int cur=l;cur<=r;cur++){ 0F$;]zg
if(i1==mid+1) %$K2$dq5
data[cur]=temp[i2++]; "LyMw){
else if(i2>r) #-b0U[,.
data[cur]=temp[i1++]; g.![>?2$8
else if(temp[i1] data[cur]=temp[i1++]; <BoDLvW>
else Y)*5M
data[cur]=temp[i2++]; W`HO Q
} oG5:]/F
} q3a`Y)aVB
FV>j !>Y
} am>X7
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改进后的归并排序: $2u^z=`b!%
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package org.rut.util.algorithm.support; i[obQx S94
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import org.rut.util.algorithm.SortUtil; o4I&?d7;"
|DAe2RK
/** >_3+s~
* @author treeroot 2$8#ePyq*
* @since 2006-2-2 (#6E{@eq
* @version 1.0 rO8Q||@>A
*/ NHKIZx8sR
public class ImprovedMergeSort implements SortUtil.Sort { kkfwICBI
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private static final int THRESHOLD = 10; N\ nr
)aY^k|I
/* n{oRmw-
* (non-Javadoc) +3B^e%`NPm
* "YLH]9"=
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) *LnY}#
*/ ?@W=bJ8{
public void sort(int[] data) { c5~d^
int[] temp=new int[data.length]; NPjh2 AJm
mergeSort(data,temp,0,data.length-1); #$trC)?~q
} o(iv=(o
Q}#5mf&cD
private void mergeSort(int[] data, int[] temp, int l, int r) { .{6?%lt
int i, j, k; n^OWz4
int mid = (l + r) / 2; DoV<p?U
if (l == r) HD"Pz}k4
return; -~z]ut<Z
if ((mid - l) >= THRESHOLD) CS[[TzC=5
mergeSort(data, temp, l, mid); P$4h_dw
else vwZd@%BO
insertSort(data, l, mid - l + 1); S,&tKDJn
if ((r - mid) > THRESHOLD) GtZkzVqLd
mergeSort(data, temp, mid + 1, r); .eQIU$Kw!O
else V&)lS Qw
insertSort(data, mid + 1, r - mid); +QS7F`O
B-63IN
for (i = l; i <= mid; i++) { }T!2IaAB
temp = data; AEx|<E0
} UPtWj8h
for (j = 1; j <= r - mid; j++) { W)rE_tw,|
temp[r - j + 1] = data[j + mid]; z0ULB?*"
} u+7B-l=u*
int a = temp[l]; YLc 2:9
int b = temp[r]; `V N $ S
for (i = l, j = r, k = l; k <= r; k++) { "]BefvE
if (a < b) { 4fe$0mye
data[k] = temp[i++]; /($!("b
a = temp; cI#2MjL
} else { |E+tQQr%'
data[k] = temp[j--]; v]*(Wd~|
b = temp[j]; FS.z lk\D=
} _;*|"e@^
} =}@m$g
} }hT1@I
z!09vDB^
/** '8g/^Y@
* @param data k:(i sKIA
* @param l &&C]i~
* @param i }NQx2k0
*/ l@}BWSx&ms
private void insertSort(int[] data, int start, int len) { [.e Y xZ{=
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); :sT\-MpQvn
} W!a~ #R/r-
} i?^Cc\gH
} |.D_[QI
} 5u ED
~<0!sE&y
堆排序： 6km{= ```
,}&E=5MF\
package org.rut.util.algorithm.support; %SV"iXxY
%I]?xe6
import org.rut.util.algorithm.SortUtil; y]OW{5(
x~."P*5
/** B7Um G)C
* @author treeroot iR-MuDM
* @since 2006-2-2 13s0uyYU<m
* @version 1.0 YM9oVF-
*/ A[juzOn\
public class HeapSort implements SortUtil.Sort{ h3^&,U
-la~p~8
/* (non-Javadoc) U:]b&I
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) q?C)5(
*/ K7&A^$`
public void sort(int[] data) { xNt
MaxHeap h=new MaxHeap(); tMaJ; 4
h.init(data); 02]9OnWw
for(int i=0;i h.remove(); )=\W sQ
System.arraycopy(h.queue,1,data,0,data.length); \6B,\l]$t@
} e=t?mDh#E
C~M~2@Iori
private static class MaxHeap{ AR\?bB~`c
LX<c(i
void init(int[] data){ g{8R+
this.queue=new int[data.length+1]; XezO_V
for(int i=0;i queue[++size]=data; `~( P
fixUp(size); kmM4KP#&|
} 4%WV)lt
} G+=6]0HT
]rM{\En
private int size=0; 2aUz.k8o
xh>/bU!>
private int[] queue; H[%Fo
.kM74X=S
public int get() { Hk-)fl#dr
return queue[1]; hoASrj{s
} _t:cDXj
o"^}2^)_SR
public void remove() { ypXKw7f(
SortUtil.swap(queue,1,size--); )>,b>7
fixDown(1); 4ei .-
} ]>@; 2%YvY
file://fixdown l;>#O
private void fixDown(int k) { V"VWHAu*.w
int j; 3OHP-oa.
while ((j = k << 1) <= size) { 9frx60
if (j < size %26amp;%26amp; queue[j] j++; Ms?V1
if (queue[k]>queue[j]) file://不用交换 ~4Is
break; S[UHx}.
SortUtil.swap(queue,j,k); {Ny\9r
k = j; &)Z8Qu
} 1Qf21oN{
} (H9%a-3
private void fixUp(int k) { ( DwIAO/S
while (k > 1) { q{f%U.
int j = k >> 1; bIizh8d?
if (queue[j]>queue[k]) :o$ R@l
break; @u/<^j3Q
SortUtil.swap(queue,j,k); 1G|Q~%cv
k = j; XzQ=8r>l
} @.kv",[{[
} 8aGZ% UI
MAR kTxzi
} fDq, )~D
kETA3(h'
} )iy>sa{
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SortUtil： [p@NzS/
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package org.rut.util.algorithm; p)tac*US
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import org.rut.util.algorithm.support.BubbleSort; CzzG
import org.rut.util.algorithm.support.HeapSort; +nd'Uf
import org.rut.util.algorithm.support.ImprovedMergeSort; &+`l $h
import org.rut.util.algorithm.support.ImprovedQuickSort; oO @6c%
import org.rut.util.algorithm.support.InsertSort; 'KQ]7
import org.rut.util.algorithm.support.MergeSort; W<2%J)N<
import org.rut.util.algorithm.support.QuickSort; uYL6g:]+ZC
import org.rut.util.algorithm.support.SelectionSort; )F? 57eh
import org.rut.util.algorithm.support.ShellSort; P0Na<)\'Y!
!N,Z3p>Q
/** 5 LX3.
* @author treeroot wRPBJ-C)
* @since 2006-2-2 UF<|1;'
* @version 1.0 *ILS/`mdav
*/ q30WUO;
public class SortUtil { YH<F~F _
public final static int INSERT = 1; C?rL>_+71
public final static int BUBBLE = 2; CpS'2@6
public final static int SELECTION = 3; Beqhe\{
public final static int SHELL = 4; mkBQX
public final static int QUICK = 5; QC<(rx
public final static int IMPROVED_QUICK = 6; h9+ylHW_cp
public final static int MERGE = 7; G !1- 20
public final static int IMPROVED_MERGE = 8; f'FY<ed<w
public final static int HEAP = 9; +nuv?QB/
6WfyP@f
public static void sort(int[] data) { dGIu0\J\$
sort(data, IMPROVED_QUICK); <zZAVGb4I
} uc Z(D|a
private static String[] name={ ? z=>n
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" .ET;wK
}; JIb<>X,
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private static Sort[] impl=new Sort[]{ xOT'4v&.
new InsertSort(), K- }k-S
new BubbleSort(), `r*6P^P
new SelectionSort(), ? |8&!F
new ShellSort(), ,zXL8T
new QuickSort(), 'dWJ#9C
new ImprovedQuickSort(), phXVuQ
new MergeSort(), X""'}X|O
new ImprovedMergeSort(), oTI*mGR1Z
new HeapSort() TP{a*ke^5,
}; sxThz7#i)
|~\K:[T&
public static String toString(int algorithm){ CHeG{l)<r
return name[algorithm-1]; }0 <x4|=
} sTG+c E
2zFdKs,
public static void sort(int[] data, int algorithm) { 6S6nE%.3
impl[algorithm-1].sort(data); t C6c4j
} FG#j0#|*
c+a f=ac
public static interface Sort { v9inBBC q
public void sort(int[] data); CPVKz
} VdeK~#k
@0 -B&w
public static void swap(int[] data, int i, int j) { -m|b2g}"3
int temp = data; rG\m]C3E
data = data[j]; CzvlZDo
data[j] = temp; ZC2C`S\xr
} 6km u'vw
} fykN\b