[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; uHNpfKnZ
} A\te*G0:S
int i1=l; dPjhq(8 zU
int i2=mid+1; <@bA?FY
for(int cur=l;cur<=r;cur++){ Hoz56y
if(i1==mid+1) q;AT>" =)
data[cur]=temp[i2++]; P,bd'
else if(i2>r) +f4W"t
data[cur]=temp[i1++]; 8n4V cu
else if(temp[i1] data[cur]=temp[i1++]; cjULX+h
else EP7AP4
data[cur]=temp[i2++]; *Zd84wRSj
} #l1Qe`
} (foBp
o07IcIo
} e,A)U5X
Ul Mi.;/^
改进后的归并排序: gdj^df+2F
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package org.rut.util.algorithm.support; @kD8^,(oH
6-,m}Ce\
import org.rut.util.algorithm.SortUtil; _|isa]u\z
wz -)1!
/** TF+ l5fv
* @author treeroot TA}UY7v
* @since 2006-2-2 EEf ]u7
* @version 1.0 ,yLw$-
*/ iz}sM>^
public class ImprovedMergeSort implements SortUtil.Sort { Qu{cB^Ga*
(*l2('e#@
private static final int THRESHOLD = 10; lj&>cScC
INMP"1
/* +lO'wa7|3
* (non-Javadoc) igDyp0t
* EH`0
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) %hT4qzJj
*/ aW5~Be$ _
public void sort(int[] data) { 7el<5chZ
int[] temp=new int[data.length]; 9EF~l9`'U
mergeSort(data,temp,0,data.length-1); L~FTr
} ACBQ3
sM\&.<B
private void mergeSort(int[] data, int[] temp, int l, int r) { lUh*?l
int i, j, k; ]T{E (9
int mid = (l + r) / 2; heD,&OX
if (l == r) qjC_*X!
return; !}&"W,,0
if ((mid - l) >= THRESHOLD) :7;[`bm(G
mergeSort(data, temp, l, mid); c8'Cq7
else 2DMrMmLI
insertSort(data, l, mid - l + 1); WBppKj_M
if ((r - mid) > THRESHOLD) RSWcaATZN
mergeSort(data, temp, mid + 1, r); fB#XhO
else 5A_4\YpDR
insertSort(data, mid + 1, r - mid); `n-vjjG%#
?=|kC*$/G
for (i = l; i <= mid; i++) { -Fwh3F4g
temp = data; ?J|4l[x
} 'm1.X-$V
for (j = 1; j <= r - mid; j++) { /! ^P)yU,
temp[r - j + 1] = data[j + mid]; ~mILA->F
} u2qV6/
int a = temp[l]; MguL$W&l
int b = temp[r]; aMCO"66b
for (i = l, j = r, k = l; k <= r; k++) { j|'R$|
if (a < b) { {},;-%xE
data[k] = temp[i++]; Sr y,@p)
a = temp; Q(\ wx
} else { $@87?Ab
data[k] = temp[j--]; WL~`u
b = temp[j]; kHU"AD}.
} XNmQ?`.2'
} !7` [i
} _p4}<pG
8j\d~Lw=
/** g{DFS[h
* @param data 5t'Fv<g
* @param l J@bW^>g*6u
* @param i Lbq_~
*/ >C2HC6O3
private void insertSort(int[] data, int start, int len) { +J40wFI:y
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); )}|mDN&P
} Hcl"T1N*
} o`U|`4,
} d/B*
} BRtXf0~&p
*h,3}\
堆排序： Dsb(CoWw
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package org.rut.util.algorithm.support; G)+Ff5e0L[
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import org.rut.util.algorithm.SortUtil; Zps&[;R$-
91;HiILgT
/** ?Leyz
* @author treeroot ?Y!U*& 7
* @since 2006-2-2 U?6yke
* @version 1.0 ^uBwj}6
*/ (n=Aa;
public class HeapSort implements SortUtil.Sort{ ?Y!^I2Y6
@W [{2d
/* (non-Javadoc) i_YW;x
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 97x%2.\:
*/ ;tN4HiN
public void sort(int[] data) { [`bZ5*&
MaxHeap h=new MaxHeap(); *SGlqR['\e
h.init(data); D{svR-~T
for(int i=0;i h.remove(); z_)`g`($
System.arraycopy(h.queue,1,data,0,data.length); z+6QZQk
} BQU/QoDY
pDhY%w#
private static class MaxHeap{ lu3.KOD/
V* Qe5j9
void init(int[] data){ $F1_^A[
this.queue=new int[data.length+1]; 3B"7VBK{
for(int i=0;i queue[++size]=data; As}eUm)B5c
fixUp(size); .WO/=#O
} qhwoV4@f
} kC|Tubs(
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private int size=0; w@-b
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private int[] queue; (. H]|
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public int get() { ;r@!a!NLB
return queue[1]; ^hysCc
} 7AeP Gr
4[_L=zD
public void remove() { cI3KB-lM#
SortUtil.swap(queue,1,size--); AJ4r/b}
fixDown(1); Z*h ;e;
} :R3P 58>
file://fixdown #ZF>WoC@e?
private void fixDown(int k) { n\*JaY
int j; 0k.v0a7%
while ((j = k << 1) <= size) { aYBTrOdz
if (j < size %26amp;%26amp; queue[j] j++; \L %q[
if (queue[k]>queue[j]) file://不用交换 O$(c.(_$
break; Y'&8L'2Z[
SortUtil.swap(queue,j,k); rkq)&l=ny
k = j; _2; ^v`[
} $*i7?S@~-
} pzAoq)gg:
private void fixUp(int k) { }Qb';-+;d
while (k > 1) { ;fkSrdj
int j = k >> 1; 9IOGc}
if (queue[j]>queue[k]) Wv NI=>
break; *78)2)=~
SortUtil.swap(queue,j,k); .5^a;`-+
k = j; y-<$bA[K~
} uNg'h/^NZ|
} Vbo5`+NAis
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} [tOuNj:
k~R{Y~W!!
} 'hy?jQ'|e
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SortUtil： a0{[P$$
v*vn<nPAQ>
package org.rut.util.algorithm; p}&Md-$1
yz8-&4YRNd
import org.rut.util.algorithm.support.BubbleSort; J2'W =r_#
import org.rut.util.algorithm.support.HeapSort; ,y{0bq9*2
import org.rut.util.algorithm.support.ImprovedMergeSort; _2#zeT5
import org.rut.util.algorithm.support.ImprovedQuickSort; CQ$::;
import org.rut.util.algorithm.support.InsertSort; 6SV7\,2M
import org.rut.util.algorithm.support.MergeSort; k*OvcYL1A
import org.rut.util.algorithm.support.QuickSort; %`eJ66T
import org.rut.util.algorithm.support.SelectionSort; /Ht/F)&P
import org.rut.util.algorithm.support.ShellSort; e& p_f<
@~s~/[
/** -E}>h[;qZ
* @author treeroot au,jAk
* @since 2006-2-2 }$<^wt
* @version 1.0 v7L"`
*/ |G)Y8 #D
public class SortUtil { Q g$($
public final static int INSERT = 1; {v,{x1
public final static int BUBBLE = 2; })KJ60B
public final static int SELECTION = 3; nW~$ (Qnd
public final static int SHELL = 4; di--:h/
public final static int QUICK = 5; ,TEuM|
public final static int IMPROVED_QUICK = 6; ) b/n)%6
public final static int MERGE = 7; ENO? ;
public final static int IMPROVED_MERGE = 8; b~jIv:9T
public final static int HEAP = 9; epn#qeX
!O 4<I_EY{
public static void sort(int[] data) { >dyhox2*"
sort(data, IMPROVED_QUICK); eN2dy-0
} G l_\Vy
private static String[] name={ A*a7\id!y
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" Z(KmS(
}; "Wo.8
oHOW5
private static Sort[] impl=new Sort[]{ Q!YF!WoBX
new InsertSort(), IF5sqv
new BubbleSort(), '/ihL^^@L
new SelectionSort(), I/Sv"X6E
new ShellSort(), 75kKDR}6
new QuickSort(), xrfPZBLy
new ImprovedQuickSort(), h4tC. i~k
new MergeSort(), r|*:9|y{"/
new ImprovedMergeSort(), R$Zv0a&
new HeapSort() '!Hhd![\=|
}; O%fUm0O d
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public static String toString(int algorithm){ zIP[R):3&U
return name[algorithm-1]; P87ld._
} {,i=>%X*
G4O,^ v;Q
public static void sort(int[] data, int algorithm) { C/CN '
impl[algorithm-1].sort(data); kxygf9I!;
} qx Wgt(Os
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public static interface Sort { 3T"#T&eL
public void sort(int[] data); HmhUc,EC
} /X@7ju;
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public static void swap(int[] data, int i, int j) { #m[vn^8B]y
int temp = data; 2dXU0095
data = data[j]; XIqv{w
data[j] = temp; MJ1W*'9</W
} ==nYe{2
} wu;7NatHx