[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; sw:a(o&$
} m.gv?
int i1=l; ;Ob^@OM
int i2=mid+1; roi,?B_8
for(int cur=l;cur<=r;cur++){ 7 > _vH]
if(i1==mid+1) BEAY}P(y3
data[cur]=temp[i2++]; 0=9$k
else if(i2>r) q&:%/?)x
data[cur]=temp[i1++]; IQ$6}.
else if(temp[i1] data[cur]=temp[i1++]; wZ`*C mr
else ]XX>h~0
data[cur]=temp[i2++]; {EVy.F
} %n,_^voE
} !F Zg' 9
C0^r]^$Z
} $EdL^Q2KAy
fU.z_T[@
改进后的归并排序: nb*`GE
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package org.rut.util.algorithm.support; s gZlk9x!Q
6!Mm")
import org.rut.util.algorithm.SortUtil; qd'Z|'j
soLmr's
/** VHLNJnA
* @author treeroot Hh&qjf
* @since 2006-2-2 IO2@^jup
* @version 1.0 oe=1[9T"
*/ @L 6)RF
public class ImprovedMergeSort implements SortUtil.Sort { 8RVRfy,w
0hXx31JN N
private static final int THRESHOLD = 10; w)R5@ @C*
fL-$wK<p<
/* .jbxA2
* (non-Javadoc) ,nV4%Aa
* @W,<8
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) nYBa+>3BDf
*/ \zDs3Hp
public void sort(int[] data) { 5Z:qU{[
int[] temp=new int[data.length]; 0xeY0!ux
mergeSort(data,temp,0,data.length-1); d*U<Ww^q
} Ue>{n{H"y
*.T?#H
private void mergeSort(int[] data, int[] temp, int l, int r) { oDt{;S8|]
int i, j, k; R`Hy0;X
int mid = (l + r) / 2; BJg
if (l == r) 8WKY 4nkj
return; /*M3Ns1@2
if ((mid - l) >= THRESHOLD) aej'cbO
mergeSort(data, temp, l, mid); i If?K%M7
else L7.SH#m
insertSort(data, l, mid - l + 1); `9T5Dem|#
if ((r - mid) > THRESHOLD) /cvMp#<]
mergeSort(data, temp, mid + 1, r); Nz;\PS
else _~F 0i?
insertSort(data, mid + 1, r - mid); =)w#?DGpj
wAL}c(EHO
for (i = l; i <= mid; i++) { #veV {,g
temp = data; .2ZFJ.Z"
} H9!q)qlK
for (j = 1; j <= r - mid; j++) { OpK_?XG
temp[r - j + 1] = data[j + mid]; (zk/>Ou
} ekmWYQ ~
int a = temp[l]; uK ,W
int b = temp[r]; :V_UJ3xf
for (i = l, j = r, k = l; k <= r; k++) { F'B0\v=
if (a < b) { J`{o`>
data[k] = temp[i++]; n@q-f-2
a = temp; }O| 9Qb
} else { <jM { <8-
data[k] = temp[j--]; d..JW{
b = temp[j]; _qo\E=E
} i1bmUKZ8'L
} #ZP;] W
} }-u%6KZ
cF?0=un
/** )V_;]9<wt
* @param data B$hog_=s
* @param l +m/n~-6q
* @param i M9Nr/jE
*/ :l?mNm5
private void insertSort(int[] data, int start, int len) { Bx5kqHp^1
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); q[/pE7FL
} OEC/'QOae
} }u{gQlV
} k*Aee7
} $2-_j)+
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堆排序： wTG(U3{3K
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package org.rut.util.algorithm.support; qL[SwEc
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import org.rut.util.algorithm.SortUtil; l@-h.tS
(=EDqAZg
/** >vO+k^'Y
* @author treeroot JZ&_1~Z=
* @since 2006-2-2 aeAx0yE[p
* @version 1.0 )8SWU)/
*/ <$WS~tTz
public class HeapSort implements SortUtil.Sort{ dep"$pys>
sH >zsc
/* (non-Javadoc) J(wFJg\/
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) m -hZ5i
*/ 8%xBSob{j
public void sort(int[] data) { 1-&L-c.
MaxHeap h=new MaxHeap(); fc[_~I'
h.init(data); 8B5WbS fL^
for(int i=0;i h.remove(); Z_Y'#5o#
System.arraycopy(h.queue,1,data,0,data.length); l\uNh~\
} *JQ*$$5
1X9s\JKQ
private static class MaxHeap{ g#cet{>
evNe6J3
void init(int[] data){ g-]~+7LL
this.queue=new int[data.length+1]; *-{|m1P
for(int i=0;i queue[++size]=data; m4Ue)
fixUp(size); Ndgx@LTQQ
} U=U5EdN;
} AYpvGl'
BBv+*jj
private int size=0; pVrY';[,|
2% OAQ(
private int[] queue; #N'9 w .
DH.UJ+
public int get() { W8;!rFW
return queue[1]; B;W%P.<.
} jIVDi~Ld
2A:h&t/|C
public void remove() { \xv(&94U
SortUtil.swap(queue,1,size--); G.v(2~QFd
fixDown(1); {8`$~c
} k}NM]9EAE
file://fixdown P8ZmrtQm
private void fixDown(int k) { Y:, rN
int j; ?:-:m'jdU
while ((j = k << 1) <= size) { K}^#VlY9
if (j < size %26amp;%26amp; queue[j] j++; {IaDZ/XS6
if (queue[k]>queue[j]) file://不用交换 '3WtpsKA
break; Pz\K3-
SortUtil.swap(queue,j,k); $CX3P)% `
k = j; cDE5/!
} !\9^|Ef?
} P=\{
private void fixUp(int k) { P".IW.^kk~
while (k > 1) { 4v3gpLH
int j = k >> 1; ;ko6igx)+
if (queue[j]>queue[k]) F"O\uo:3
break; eF9GhwE=
SortUtil.swap(queue,j,k); VuH ->
k = j; <JU3sXl
} "k{so',7z
} 5gqs"trF
Y$]zba
} /F(n%8)Yq
K7K/P{@9[9
} o[iN/
8&| o
SortUtil： G9yK/g&q
KAI2[ gs
package org.rut.util.algorithm; `[U.BVP'
Y:t?W
import org.rut.util.algorithm.support.BubbleSort; ]sk=V.GGQ
import org.rut.util.algorithm.support.HeapSort; o ]z#~^w
import org.rut.util.algorithm.support.ImprovedMergeSort; a !%,2|U
import org.rut.util.algorithm.support.ImprovedQuickSort; wWiYxBeN
import org.rut.util.algorithm.support.InsertSort; a.}#nSYP
import org.rut.util.algorithm.support.MergeSort; !2l2;?jM
import org.rut.util.algorithm.support.QuickSort; ck5cO-1>6
import org.rut.util.algorithm.support.SelectionSort; Qz#By V:
import org.rut.util.algorithm.support.ShellSort; VJ&<6
f17E2^(I(}
/** 'xGhMgR;
* @author treeroot !$oa6*<1
* @since 2006-2-2 dS4zOz"
* @version 1.0 4n7Kz_!SVf
*/ MJ1qU}+]
public class SortUtil { Ui`{U
public final static int INSERT = 1; D5snaGss9a
public final static int BUBBLE = 2; x5BS|3W$a
public final static int SELECTION = 3; }9fch9>Zr
public final static int SHELL = 4; ,}gJY^X+
public final static int QUICK = 5; $["HC-n?.k
public final static int IMPROVED_QUICK = 6; ~$5XiY8A
public final static int MERGE = 7; to</
public final static int IMPROVED_MERGE = 8; h%ys::\zF
public final static int HEAP = 9; x]x3iFD
4oiE@y&{4
public static void sort(int[] data) { C|TQf8
sort(data, IMPROVED_QUICK); pka^7OWyN
} sIgTSdk
private static String[] name={ ~44u_^a
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" d\]KG(T
}; <KU0K
L,y q=%h|
private static Sort[] impl=new Sort[]{ Yr_B(n
new InsertSort(), B=& [Z2
new BubbleSort(), nLz;L r!
new SelectionSort(), !~~KM?g
new ShellSort(), !6=;dX
new QuickSort(), >,]a>V
new ImprovedQuickSort(), u0&R*YV
new MergeSort(), *pa hZiO
new ImprovedMergeSort(), |7c],SHm
new HeapSort() K9%rr_ja!
}; GEc-<`-
J4::.r
public static String toString(int algorithm){ ;7:} iKU
return name[algorithm-1]; EtN,
} P(k*SB|D
}={@_g#
public static void sort(int[] data, int algorithm) { >:6iFPP
impl[algorithm-1].sort(data); ?5nEmG|kO
} 7wh4~
)Su>8f[?e
public static interface Sort { ?YL JXq
public void sort(int[] data); %"mI["{
} ?g+3 URpK
VtLRl0/
public static void swap(int[] data, int i, int j) { J\*uW|=F
int temp = data; PzSLE>Q
data = data[j]; g@>llve{
data[j] = temp; piM4grg \
} iRsB|7v[,
} yHw @Z