[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; uwJkqlUOz
} \b->AXe8
int i1=l; QPnc "!
int i2=mid+1; *KAuyJr
for(int cur=l;cur<=r;cur++){ #]2u!ama
if(i1==mid+1) dhbJ1/z^
data[cur]=temp[i2++]; 6822xk
else if(i2>r) aU@z\sQ
data[cur]=temp[i1++]; hS Sq=(S
else if(temp[i1] data[cur]=temp[i1++]; BKk*<WMD
else 81&!!qhfS
data[cur]=temp[i2++]; Sl1N V
} [}D)73h`
} ^]HwStn&=
|Cm}%sgR\0
} jp|wc,]!
RN0Rk 8AC
改进后的归并排序: S1."2AxO
w jF\>
package org.rut.util.algorithm.support; h!.(7qdd
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import org.rut.util.algorithm.SortUtil; #AHIlUH"m
H={,zZ11{
/** rqIt}(J
* @author treeroot @0G}Q
* @since 2006-2-2 ]TQjk{X<
* @version 1.0 =vWnqF:
*/ j2z$kw%
public class ImprovedMergeSort implements SortUtil.Sort { Pdv&X*KA
${?Px c{-
private static final int THRESHOLD = 10; {VFpfo
`JC!uc
/* x-"7{@lz
* (non-Javadoc) 6-oQs?
* 975KRnj
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) !vU[V,~
*/ |:AjQ&PM)
public void sort(int[] data) { 0Bll6Rd
int[] temp=new int[data.length]; ."2V:;;
mergeSort(data,temp,0,data.length-1); ~=71){4A
} 7M4iBk4I
QRRZMdEGs[
private void mergeSort(int[] data, int[] temp, int l, int r) { hk~s1"
int i, j, k; 5\pizD/17
int mid = (l + r) / 2; zd}"8
if (l == r) U_:/>8})d
return; u`ZnxD>
if ((mid - l) >= THRESHOLD) 3KqylC&.
mergeSort(data, temp, l, mid); qRr;&M &t_
else % $J^dF_0
insertSort(data, l, mid - l + 1); >yaRz+
if ((r - mid) > THRESHOLD) )t|M)zJ
mergeSort(data, temp, mid + 1, r); R_-.:n%.z
else {P*RA'H3G
insertSort(data, mid + 1, r - mid); D;Z\GnD
v"^G9u
for (i = l; i <= mid; i++) { U+\\#5$
temp = data; RSp=If+4
} a^,Xm(Wb}
for (j = 1; j <= r - mid; j++) { \E n^Vf
temp[r - j + 1] = data[j + mid]; G-Y8<mEh
} j_k!9"bt
int a = temp[l]; FN G]
int b = temp[r]; NL1Ajms`
for (i = l, j = r, k = l; k <= r; k++) { EayZ*e]
if (a < b) { -&+[/
data[k] = temp[i++]; w'}b 8m(L
a = temp; -cMqq$
} else { q>,i `*
data[k] = temp[j--]; ;0 ,-ywK
b = temp[j]; Ug/b;( dJ'
} gVb;sk^
} T$SGf.-
} aCQAh[T
"Ln)v
/** oB+drDp8U
* @param data caS5>wk`R
* @param l iOw'NxmY
* @param i Zhf+u r
*/ {"-uaH>,
private void insertSort(int[] data, int start, int len) { a:C ly9
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 7V?TLGgd$
} | X! d*4
} N_wB
} L2+~I<|>
} ht)J#Di
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堆排序： ji5c0WH
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package org.rut.util.algorithm.support; ]%pr1Ey
oUoDj'JN{
import org.rut.util.algorithm.SortUtil; "|`euxYV
(} ?")$.
/** DY1UP(y
* @author treeroot G?*)0`~W
* @since 2006-2-2 Q3T@=z2j%
* @version 1.0 HW"@~-\
*/ gAD,
public class HeapSort implements SortUtil.Sort{ opc`n}Fc
>8PGyc*9
/* (non-Javadoc) j"1#n? 0
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) *> LA30R*v
*/ 5o2w)<d!
public void sort(int[] data) { `)?N7g[\u
MaxHeap h=new MaxHeap(); ^Y,nv,gYn
h.init(data); mQUI9
for(int i=0;i h.remove(); @L0xU??"|
System.arraycopy(h.queue,1,data,0,data.length); ZMEU4?F
} P:KS*lOp
wNl{,aH@
private static class MaxHeap{ ZD~ra7
VH M&Y-G
void init(int[] data){ P.aN4 9`=
this.queue=new int[data.length+1]; iC2``[m"
for(int i=0;i queue[++size]=data; Q,v/]bXd
fixUp(size); JCFiKt9n
} JCO+_d#x
} #|8Ia:=s
mSeCXCrZlI
private int size=0; mUA!GzJ~u-
_3%eIyk4T
private int[] queue; V$0mcwH
Uhs/F:E[A
public int get() { vj%3v4
return queue[1]; u43W.4H13
} sD#*W<
g^I?u$&E
public void remove() { L _D#
SortUtil.swap(queue,1,size--); i+90##4<?
fixDown(1); Q%r KKOX8
} {:]u 6l
file://fixdown 0uL*-/|
private void fixDown(int k) { 9$f%
int j; &ea6YQ
while ((j = k << 1) <= size) { B_mT[)ut
if (j < size %26amp;%26amp; queue[j] j++; 4v.{C"M
if (queue[k]>queue[j]) file://不用交换 (h"-#q8$
break; 0@yw#.j
SortUtil.swap(queue,j,k); +?)R}\\
k = j; X6<Ds'I
} @)XR
} go9tvK
private void fixUp(int k) { r17"i.n
while (k > 1) { U0=: `G2l
int j = k >> 1; %0Ibi
if (queue[j]>queue[k]) @.)WS\Cv#E
break; ~^bf1W[
SortUtil.swap(queue,j,k); x3:d/>b
k = j; xc}kDpF=g
} ZZM;%i-B
} RiG]-K:
o-<XR9,N*
} ,Cd4Q7T
";jKTk7
} '""s%C+
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SortUtil： M1=eS@
(3WK2IM^
package org.rut.util.algorithm; L8J] X7
; GEr8_7
import org.rut.util.algorithm.support.BubbleSort; RK/>5
import org.rut.util.algorithm.support.HeapSort; WCY5F
import org.rut.util.algorithm.support.ImprovedMergeSort; T9FGuit9
import org.rut.util.algorithm.support.ImprovedQuickSort; 2y IDyo
import org.rut.util.algorithm.support.InsertSort; ,zEPdhTX
import org.rut.util.algorithm.support.MergeSort; T_[5 ZYy
import org.rut.util.algorithm.support.QuickSort; [Lcy &+
import org.rut.util.algorithm.support.SelectionSort; VIaj])m
import org.rut.util.algorithm.support.ShellSort; ASB3|uy_
lS|F&I5j
/** rgo!t028^
* @author treeroot j-d542"
* @since 2006-2-2 woa|h"T
* @version 1.0 >9y!M'V
*/ %?3$~d\n
public class SortUtil { T|p%4hH
public final static int INSERT = 1; r6&+pSA>
public final static int BUBBLE = 2; u"MfxW`
public final static int SELECTION = 3; #y'p4Xf
public final static int SHELL = 4; _yp<#q]
public final static int QUICK = 5; 1,Jy+1G0w
public final static int IMPROVED_QUICK = 6; Ej $.x6:
public final static int MERGE = 7; U8{^-#(Uz
public final static int IMPROVED_MERGE = 8; M< H+$}[
public final static int HEAP = 9; tr58J%Mu
m=TZfa^r
public static void sort(int[] data) { wlQ @3RN>
sort(data, IMPROVED_QUICK); p+228K ;H
} ;{Yr|
private static String[] name={ /.(~=6o5
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" dt0(04
}; #r,!-;^'p
cd`P'GDF
private static Sort[] impl=new Sort[]{ g'Wr+(A_
new InsertSort(), ^U);MH8
new BubbleSort(), O;$}j:;KF
new SelectionSort(), p0D@O_ :5
new ShellSort(), +i[@+`
new QuickSort(), v|dt[>G
new ImprovedQuickSort(), w4FYd
new MergeSort(), IH`7ou{
new ImprovedMergeSort(), !C(PfsrR/
new HeapSort() ..x2
}; P'<j<h6
QRx9;!~b}
public static String toString(int algorithm){ 3vkzN
return name[algorithm-1]; 21my9Ui]
} wb%4f6i
1+[,eq
public static void sort(int[] data, int algorithm) { `QZKW
impl[algorithm-1].sort(data); \p%D;g+c
} ']d(m?
vsPIvW!V
public static interface Sort { S_ra8HY8
public void sort(int[] data); 5~$WSL?O)
} 36Lf8~d4"h
W.59Al'
public static void swap(int[] data, int i, int j) { 8g=];@z
int temp = data; 0d$LUQ't
data = data[j]; h*Mt{A&'.&
data[j] = temp; N'PK4:
} ~Lq`a@]A
} YV'B*arIA