[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; Rab7Y,AA
} JiX-t\V~
int i1=l; q=26($
int i2=mid+1; U)_x(B3d/
for(int cur=l;cur<=r;cur++){ 3Zm;:v4y
if(i1==mid+1) 88zK)k{
data[cur]=temp[i2++]; E>YE3-]
else if(i2>r) Nkk+*(Z
data[cur]=temp[i1++]; %p^`,b}
else if(temp[i1] data[cur]=temp[i1++]; j"vL$h
else (l)r.Vj
data[cur]=temp[i2++]; Jwbb>mB!
} 1sXVuto
} T{*!.+E
W"5VqN6v
} GO6uQ};
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改进后的归并排序: ^7Z.~A y
9@YhAj
package org.rut.util.algorithm.support; xepp."O
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import org.rut.util.algorithm.SortUtil; -K0!wrKC
.QDeS|l
/** P5Pb2|\*
* @author treeroot R7Z!
* @since 2006-2-2 piAFxS<6
* @version 1.0 v.>95|8
*/ X>Y>1fI.
public class ImprovedMergeSort implements SortUtil.Sort { ov|pXi<e
WCg&*
private static final int THRESHOLD = 10; knRs{1}Pw{
^x}k1F3
/* B?;P:!/1
* (non-Javadoc) W9jxw4)
* rf =Wq_
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) !4T7@V`G
*/ |GP1[Q{
public void sort(int[] data) { #M[%JTTn
int[] temp=new int[data.length]; }i9VV+L#1
mergeSort(data,temp,0,data.length-1); 32K
} 9@ :QBe3]
dU|&- .rG
private void mergeSort(int[] data, int[] temp, int l, int r) { #9q ]jjH E
int i, j, k; <!PbD
int mid = (l + r) / 2; p^ )iC&*0
if (l == r) DP!~WkU~
return; h:<?)g~U
if ((mid - l) >= THRESHOLD) 'A'[N :i
mergeSort(data, temp, l, mid); ZP"Xn/L
else qyR}|<F8*
insertSort(data, l, mid - l + 1); J|DY /v
if ((r - mid) > THRESHOLD) _kUtj(re
mergeSort(data, temp, mid + 1, r); t:tIzFNv
else \T^ptj(0
insertSort(data, mid + 1, r - mid); vFi+ExBU
fD2)/5j1
for (i = l; i <= mid; i++) { T!t9`I0Zz
temp = data; dEPLkv
} x+W,P
for (j = 1; j <= r - mid; j++) { &LHS<Nv^:
temp[r - j + 1] = data[j + mid]; /vw$3,*z
} e9rgJJ
int a = temp[l]; }k_'a^;C1
int b = temp[r]; ^NFL3v8
for (i = l, j = r, k = l; k <= r; k++) { {,e-;2q
if (a < b) { VH<-||X/4
data[k] = temp[i++]; .c\iKc#
a = temp; MD[;Ha
} else { nYy+5u]FG
data[k] = temp[j--]; 8l >Xbz
b = temp[j]; 0uJ??4N9
} :} DTK
} 4Xe8j55
} iB5'mb*
%ZGG6Xgw
/** m[Cp G=32B
* @param data #2?3B
* @param l \ 9#X]H
* @param i gh.+}8="
*/ .:B;%*
private void insertSort(int[] data, int start, int len) { NPLJ*uHH
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); TECp!`)j"
} |eP5iy wg
} FR6PY
} oe[f2?-
} :O]US)VSj
QQ./!
堆排序： oh,29Gg
YGOhUT |
package org.rut.util.algorithm.support; %(:{TR
o8N,mGj}
import org.rut.util.algorithm.SortUtil; x,TnYqT^
B9S@G{`
/** 'm.+S8
* @author treeroot -b=Aj8h
* @since 2006-2-2 G@scz!Nt
* @version 1.0 FM<`\d'
*/ ?{wD%58^oG
public class HeapSort implements SortUtil.Sort{ ?vmoRX
;e6-*
/* (non-Javadoc) __`6 W1
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Pdk#"H-j
*/ k;jXVa
public void sort(int[] data) { Qn)AS1pL+
MaxHeap h=new MaxHeap(); &A~hM[-
h.init(data); hY|-l%2f
for(int i=0;i h.remove(); $Ao'mT
System.arraycopy(h.queue,1,data,0,data.length); *Nur>11D
} ,n&Lp
\W7pSV-U
private static class MaxHeap{ t@q==VHF
o&>aYlXd
void init(int[] data){ 06[HE7
this.queue=new int[data.length+1]; ^m-w@0^z
for(int i=0;i queue[++size]=data; 'Ej+Jczzpp
fixUp(size); 3|bbJ6*.<
} bRK\Tua 6
} S%jFH4#
5TLE%#G@+
private int size=0; iKG,"
xMFEeSzl>S
private int[] queue; sCE%./h]
g1)ZjABV
public int get() { ~%@1-
return queue[1]; FA{(gib@9
} $.zd,}l@L
D&G^|: G
public void remove() { \Yh*ywwP#
SortUtil.swap(queue,1,size--); |g1Pr9{wy
fixDown(1); I/go$@E"
} p;~oIy\,
file://fixdown .pIO<ZAFT
private void fixDown(int k) { !1Nh`FN
int j; r(JP& @
while ((j = k << 1) <= size) { '~zi~Q7M
if (j < size %26amp;%26amp; queue[j] j++; q2*1Gn9!j
if (queue[k]>queue[j]) file://不用交换 $J#Z`%B^y
break; ,@\z{}~v
SortUtil.swap(queue,j,k); e<+b?@}=B
k = j; }H|'W[Q.
} |qpFR)l
} D/+l$aBz
private void fixUp(int k) { y:Aha#<
while (k > 1) { k\IdKiOj!D
int j = k >> 1; 9*VL|
if (queue[j]>queue[k]) /q) H0b
break; "G@(Cb*+T
SortUtil.swap(queue,j,k); "iUh.c=0F,
k = j; FIx|4[&>S
} b(t8TR#-
} H\$uRA oo*
-FW^fGS+
} ~/rKKc
nK#%Od{GF
} B_>r|^Vh
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SortUtil： _} K3}}
P3v4!tR
package org.rut.util.algorithm; Gh352
3gtKD9RL:
import org.rut.util.algorithm.support.BubbleSort; -B#K}xL|x
import org.rut.util.algorithm.support.HeapSort; 1 ]ePU8
import org.rut.util.algorithm.support.ImprovedMergeSort; m$7C{Mr'
import org.rut.util.algorithm.support.ImprovedQuickSort; +'_ peT.8
import org.rut.util.algorithm.support.InsertSort; ,\N4tG1\
import org.rut.util.algorithm.support.MergeSort; MHJRBn{}
import org.rut.util.algorithm.support.QuickSort; O+]'*~a
import org.rut.util.algorithm.support.SelectionSort; 1C0' Gf)3
import org.rut.util.algorithm.support.ShellSort; XW~a4If
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/** ]~!CJ8d
* @author treeroot 5F#FC89Kk
* @since 2006-2-2 T[MDjhv'
* @version 1.0 tToP7q^
*/ \UZ7_\
public class SortUtil { @76I8r5l
public final static int INSERT = 1; zx@L sp
public final static int BUBBLE = 2; c/V0AKkS 8
public final static int SELECTION = 3; Rln\
public final static int SHELL = 4; syCT)}T6z
public final static int QUICK = 5; RwhKW?r+
public final static int IMPROVED_QUICK = 6; #/HZ[Vw
public final static int MERGE = 7; Q:Ma3El\
public final static int IMPROVED_MERGE = 8; _%#Uh#7P$
public final static int HEAP = 9; NMUF)ksjN
[3x},KM
public static void sort(int[] data) { i*@ZIw
sort(data, IMPROVED_QUICK); %,e,KcP'
} _7~q|
private static String[] name={ Ctx>#uN6
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 8,(--A
}; X"7x_yOZ
@!^Y_q
private static Sort[] impl=new Sort[]{ b1QHZY\g{
new InsertSort(), &P"13]^@
new BubbleSort(), Uyxn+j5
new SelectionSort(), ZrB(!L~7
new ShellSort(), >< VUly
new QuickSort(), _&S;*?K.
new ImprovedQuickSort(), Gte\=0Wr
new MergeSort(), iJ @p:
new ImprovedMergeSort(), ,C|{_4
new HeapSort() z[K)0@8 6
}; /IF?|71,m
2/\I/QkTs
public static String toString(int algorithm){ Mi\- 9-
return name[algorithm-1]; YFW/ Fa\7
} j8aH*K-l{
h6n!"z8H
public static void sort(int[] data, int algorithm) { :#cJZ\YH
impl[algorithm-1].sort(data); ~+V$0Q;L
} i:jns>E
'H#0-V"=
public static interface Sort { &WOm[]Q4
public void sort(int[] data); +\?+cXSc
} mq(-L
c6AwO?x/
public static void swap(int[] data, int i, int j) { fzOh3FO+
int temp = data; mA"[x_
data = data[j]; \U##b~Z,g
data[j] = temp; Y#6LNI
} {?"X\5n0
} H)CoByaj