[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; 6W2hr2Zy9
} =H`Q~Xx
int i1=l; %Y nmuZ
int i2=mid+1; dA~ 3>f*b_
for(int cur=l;cur<=r;cur++){ 5K%Wa]W
if(i1==mid+1) ~Ci{3j :]
data[cur]=temp[i2++]; iz[gHB
else if(i2>r) MgMD\
data[cur]=temp[i1++]; | A)\ :
else if(temp[i1] data[cur]=temp[i1++]; b^CNVdo'
else 8p^B hd
data[cur]=temp[i2++]; H`QQG!
} k!L@GQ
} zTm]AG|0
} p:%[
} %&<LNEiUN
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改进后的归并排序: V9%aBkf8w
?&+9WJ<M
package org.rut.util.algorithm.support; o^p
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import org.rut.util.algorithm.SortUtil; L:&k(YOBA
E8[T
/** ]+Ixi o
* @author treeroot \,G#<>S
* @since 2006-2-2 &2.u%[gO[q
* @version 1.0 (R}ii}&
*/ 2t#L:vY
public class ImprovedMergeSort implements SortUtil.Sort { 'DbMF?<.
OS-f(qXd+
private static final int THRESHOLD = 10; r7mD{0s*
",qU,0
/* KW3+luI6
* (non-Javadoc) Li{~=S@N*
* 2[yBD-":
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) N:5[,O<m_
*/ |UUdz_i!:
public void sort(int[] data) { r?$?;%|C
int[] temp=new int[data.length]; w}cY6O,1
mergeSort(data,temp,0,data.length-1); :$3oFN*g
} rSXzBi{
'fd1Pj9~$
private void mergeSort(int[] data, int[] temp, int l, int r) { ib6^x:HGU
int i, j, k; AONDx3[
int mid = (l + r) / 2; G=9d&N
if (l == r) a:STQk V
return; ^%T7.1'x
if ((mid - l) >= THRESHOLD) io2)1cE&f
mergeSort(data, temp, l, mid); ^eq</5q D
else 3,X/,'
insertSort(data, l, mid - l + 1); :Ixx<9c.
if ((r - mid) > THRESHOLD) 5`+5{p
mergeSort(data, temp, mid + 1, r); ~%k?L4%
else ?uLeFD
insertSort(data, mid + 1, r - mid); uzr\oj+>
k=ytuV\
for (i = l; i <= mid; i++) { S::=85[>z
temp = data; G@ \Pi#1
} 32)tJ|m
for (j = 1; j <= r - mid; j++) { QCOo
temp[r - j + 1] = data[j + mid]; ^rNUAj9Z
} +C]&2zc.
int a = temp[l]; j{++6<tr
int b = temp[r]; ?X$,fQ#F|
for (i = l, j = r, k = l; k <= r; k++) { y2L#:[8
if (a < b) { }ut]\]b
data[k] = temp[i++]; <U Zd;e@
a = temp; 7L5P%zLtB
} else { 8T[ 6J{|C
data[k] = temp[j--]; : esg(
b = temp[j]; z,SYw &S
} Aj>[z8!,
} bzpFbfb
} m!n/U-^
W~n.Xeu{C
/** p/6zEZ*
* @param data p zw8T
* @param l c7uG9
* @param i ~"x5U{K48S
*/ <!d"E@%v@
private void insertSort(int[] data, int start, int len) { "8f?h%t
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); j V3)2C}
} h!@,8y[B
} JtKp(k&
} kh$_!BT
} g\fhp{gWB
;!>Wz9
堆排序： Xf'=+f2p
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package org.rut.util.algorithm.support; ,U,By~s
sUkm|K`#
import org.rut.util.algorithm.SortUtil; 6rti '
)KSoq/
/** K+\nC)oG
* @author treeroot AEirj /
* @since 2006-2-2 "d/s5sP|S
* @version 1.0 '_s}o<
*/ {Bvj"mL]j
public class HeapSort implements SortUtil.Sort{ F?+3%>/A@
*hhmTc#
/* (non-Javadoc) W[bmzvJ_X
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) V)M1YZV{
*/ 5X.ebd;PT
public void sort(int[] data) { +]xFoH
MaxHeap h=new MaxHeap(); %hS|68pN6
h.init(data); e'*HS7g
for(int i=0;i h.remove(); Y qdWctUY
System.arraycopy(h.queue,1,data,0,data.length); jjs&`Fy,
} AIl4]F5I
~!iQ6N?PY
private static class MaxHeap{ B/f0P(7
}alj[)
void init(int[] data){ <~emx'F|
this.queue=new int[data.length+1]; }3 m0AQ;K
for(int i=0;i queue[++size]=data; I`RBj`IF
fixUp(size); vE, 37
} \kIMDg3}
} kfb/n)b'
]DG?R68DQ
private int size=0; >QE{O.Z
9-1#( Y6S
private int[] queue; VaZn{z
*O$CaAr\s
public int get() { f|EUqu%E
return queue[1]; 7v}x?I
} ;^u*hZN[Up
q z&+=d@
public void remove() { !cW[G/W8
SortUtil.swap(queue,1,size--); eJ8]g49mD6
fixDown(1); W_M'.1 t
} :PYtR
file://fixdown .lG5=Th!
private void fixDown(int k) { PaB!,<A
int j; *4Fr&^M\
while ((j = k << 1) <= size) { SkNre$>t{
if (j < size %26amp;%26amp; queue[j] j++; j=+"Qz/hr_
if (queue[k]>queue[j]) file://不用交换 ^H'a4G3
break; EpPf_ \o
SortUtil.swap(queue,j,k); `s#Hq\C
k = j; m`?MV\^
} A1Y7;-D
} <G8w[hs
private void fixUp(int k) { KU9Z"9#
while (k > 1) { SjEAuRDvUz
int j = k >> 1; |+IZS/W"
if (queue[j]>queue[k]) J'&#mDU
break; E4.SF|=x
SortUtil.swap(queue,j,k); Bvjl-$m!v
k = j; 4\5uY
} WP**a Bp
} KLQTKMNv
S]3Ev#>
} R\Z:n*
NF$\^WvYSP
} qk(P>q8[
nxm$}!Df
SortUtil： ,.IEDF<&
(WlIwKP
package org.rut.util.algorithm; .S\&L-{
xFv;1Q
import org.rut.util.algorithm.support.BubbleSort; -C7]qbT }
import org.rut.util.algorithm.support.HeapSort; zW |=2oX2
import org.rut.util.algorithm.support.ImprovedMergeSort; >k7q g$
import org.rut.util.algorithm.support.ImprovedQuickSort; 8euZTfK9e
import org.rut.util.algorithm.support.InsertSort; cTZ.}eLh
import org.rut.util.algorithm.support.MergeSort; ,38Eq`5&W
import org.rut.util.algorithm.support.QuickSort; \[2lvft!
import org.rut.util.algorithm.support.SelectionSort; $gle8Z-
import org.rut.util.algorithm.support.ShellSort; n_D8JF
VzS&`d.h
/** @gGRm
* @author treeroot L];y}]:F*
* @since 2006-2-2 'WyTI^K9
* @version 1.0 ?wpB`
*/ ^,Ydr~|T
public class SortUtil { <oMUQ*OtV
public final static int INSERT = 1; }1 vT)
public final static int BUBBLE = 2; _1Z=q.sC
public final static int SELECTION = 3; lt'I,Xt
public final static int SHELL = 4; TB6m0qX(
public final static int QUICK = 5; >"3>s%
public final static int IMPROVED_QUICK = 6; #Sg\q8(O
public final static int MERGE = 7; L?&'xzt B
public final static int IMPROVED_MERGE = 8; s$h] G[x
public final static int HEAP = 9; !7B\Xl'S
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public static void sort(int[] data) { d?,M/$h
sort(data, IMPROVED_QUICK); 0\{BWNK
} OU DcY@x~
private static String[] name={ ^ ?hA@{T/1
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" %%%fL;-y
}; uv{P,]lK
Jc4L5*Xn/
private static Sort[] impl=new Sort[]{ 5wtTP ;P
new InsertSort(), ']6VB,c`
new BubbleSort(), JHn*->m
new SelectionSort(), }]P4-KqI
new ShellSort(), q!'rz
new QuickSort(), Z@D*1\TG=
new ImprovedQuickSort(), X+8B!F
new MergeSort(), |tMn={
new ImprovedMergeSort(), Fr?z"
new HeapSort() e59dVFug.U
}; P3tx|:gV
G1T^a>tj4
public static String toString(int algorithm){ Q'apG)0I
return name[algorithm-1]; !v#xb3"/
} fg%&N2/(.B
_,h@:Xij
public static void sort(int[] data, int algorithm) { .~lKBkS`!
impl[algorithm-1].sort(data); I XA>`D
} ;a"q'5+Ne
y9Y1PH7G
public static interface Sort { ]bCq=6ZKR
public void sort(int[] data); ] 7;f?+
} kW=z+
P%pp )BS
public static void swap(int[] data, int i, int j) { }WFf''Z-
int temp = data; }7<5hn E
data = data[j]; Zwt;d5U
data[j] = temp; D6D1S/:ij'
} Z~G my7h(
} 9W*+SlH@!