[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; -%V-'X5
} I.0P7eA-
int i1=l; ;$L!`"jn
int i2=mid+1; >\.[}th}
for(int cur=l;cur<=r;cur++){ jKV?!~/F
if(i1==mid+1) U6'haPlOk%
data[cur]=temp[i2++]; PM<LR?PLc
else if(i2>r) U4L=3T+:[
data[cur]=temp[i1++]; sAN:C{
else if(temp[i1] data[cur]=temp[i1++]; v?TJ!o
else G1^!ej
data[cur]=temp[i2++]; %PdYv _5
} MVv^KezD
} /^eemx
8Pdnw/W
} rHBjR_L.2
VrE5^\k<a
改进后的归并排序: 1LIV/l^}f
ftH%, /,
package org.rut.util.algorithm.support; v_h*:c
:;WDPRx
import org.rut.util.algorithm.SortUtil; Eg29|)qsz
5YH mp7c-z
/** wVJFA1
* @author treeroot Ml/p{ *p
* @since 2006-2-2 J+NK+,_*M
* @version 1.0 Ry S{@=si
*/ \Y[)bo6s
public class ImprovedMergeSort implements SortUtil.Sort { (4f9wrK
GXlg%
private static final int THRESHOLD = 10; MVd 3*
:@Dos'0Px
/* pvUoed\
* (non-Javadoc) :Sn3|`HDm
* 2\tjeg
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) htrj3$q(4
*/ 6SO7iFS
public void sort(int[] data) { 6%INNIyAWa
int[] temp=new int[data.length]; +*{5ORq=
mergeSort(data,temp,0,data.length-1); Od]xIk+E
} \` ^Tbn:
_1c_TMh}9
private void mergeSort(int[] data, int[] temp, int l, int r) { V"jnrNs3
int i, j, k; s'Q^1oQM2h
int mid = (l + r) / 2; l'%R^
if (l == r) z ;Nk& <?
return; R./6Q1
if ((mid - l) >= THRESHOLD) {1DYXKe
mergeSort(data, temp, l, mid); jF_I4H
else c+/C7C o
insertSort(data, l, mid - l + 1); &E`Z_}~
if ((r - mid) > THRESHOLD) "$pgmf2
mergeSort(data, temp, mid + 1, r); U?j>28
else PSR`8z n
insertSort(data, mid + 1, r - mid); Y(Ezw !a
(b}7Yb]#c
for (i = l; i <= mid; i++) { H^:|`T|,
temp = data; T5_Cu9>ax
} RAbq_^Q
for (j = 1; j <= r - mid; j++) { %<|KJb4?
temp[r - j + 1] = data[j + mid]; m e{SVG{
} HWOH8q{f!
int a = temp[l]; K61os&K
int b = temp[r]; " z'!il#
for (i = l, j = r, k = l; k <= r; k++) { BQ0\+
if (a < b) { R>&/n/l
data[k] = temp[i++]; M F: Eu
a = temp; J4#]8!A
} else { xumv I{
data[k] = temp[j--]; "1Aus
b = temp[j]; 8mLU ~P |
} 4PM`hc
} `3oP^#
} :?k=Yr
mJR T+SZ
/** @\}36y
* @param data M)^9e?
* @param l q:sR zX
* @param i Vp{2Z9]}
*/ "<a|Q,!
private void insertSort(int[] data, int start, int len) { Yb{t!KL
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); &ru0i@?)
} Rj`Y X0?+
} S`w)b'B!M
} !PIdw~YC
} <j3HT"^[D
+qf{ '|H
堆排序： *S_Iza #&x
y<d#sv(s
package org.rut.util.algorithm.support; Asu"#sd
Lo9?,^S
import org.rut.util.algorithm.SortUtil; Vnb#N4vR
3[Iw%% q
/** )6+W6:
* @author treeroot AI;=k
* @since 2006-2-2 F &}V65
* @version 1.0 ~U+'3.Wo
*/ s9Z2EjQV
public class HeapSort implements SortUtil.Sort{ 8:fiO|~%
K.m[S[cy
/* (non-Javadoc) U~t(YT
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) cpnwx1q@
*/ ,m]q+7E
public void sort(int[] data) { 6|}mTG^
MaxHeap h=new MaxHeap(); #?6RoFgMe
h.init(data); ]!:Y]VYN)\
for(int i=0;i h.remove(); rtE,SN
System.arraycopy(h.queue,1,data,0,data.length); h cXqg
} B{ "<\g
.p>8oOp
private static class MaxHeap{ nTKfwIeg5
zUqDX{I8
void init(int[] data){ rSn7(3e4^
this.queue=new int[data.length+1]; q8>Q,F`BA
for(int i=0;i queue[++size]=data; |Wk G='02
fixUp(size); 3k^jR1
} m5{SPa,y
} !F)oX7"
;D:T ^4
private int size=0; }*.*{I
1PSb72h<
private int[] queue; >.\E'e5^C
PM7/fv*,
public int get() { 9To6Rc;
return queue[1]; "QS7?=>*F
} ||aU>Wj4
`0:@`)&g1
public void remove() { 9lV'3UG-?
SortUtil.swap(queue,1,size--); 4PQWdPv;
fixDown(1); .vMi<U;
} %A3Jd4DH
file://fixdown 9#!tzDOtD
private void fixDown(int k) { nT"z(\i.!J
int j; {+Yo&F}n
while ((j = k << 1) <= size) { }}_l@5
if (j < size %26amp;%26amp; queue[j] j++; &)-?=M
if (queue[k]>queue[j]) file://不用交换 H #_Z6J
break; BYU.ptiJJ
SortUtil.swap(queue,j,k); ]U%Tm>s.
k = j; A4' aB0^
} @jKB!z9{
} (.o'1'
private void fixUp(int k) { W(YJz#]6_
while (k > 1) { "#jKk6{I0
int j = k >> 1; 7ZZt|bl
if (queue[j]>queue[k]) K#r`^aUc
break; I]X<L2
SortUtil.swap(queue,j,k); kZQ;\QL1}
k = j; UhK,H
} GWKefH
} r$5!KO
51x,[y+Xe
} :cTi$n
qv\yQ&pj
} v*3:8Y,
wn`budH?c8
SortUtil： O5 SX"A
?*,q#ZkA9W
package org.rut.util.algorithm; ^MUM04l
:%{7Q$Xv<
import org.rut.util.algorithm.support.BubbleSort; z/b*]"g,
import org.rut.util.algorithm.support.HeapSort; 4<|u~n*JF
import org.rut.util.algorithm.support.ImprovedMergeSort; {SV$fl;
import org.rut.util.algorithm.support.ImprovedQuickSort; zdCt#=QV?R
import org.rut.util.algorithm.support.InsertSort; Za w+
import org.rut.util.algorithm.support.MergeSort; X!Q"p$D4(
import org.rut.util.algorithm.support.QuickSort; qb&*,zN
import org.rut.util.algorithm.support.SelectionSort; t At+5H
import org.rut.util.algorithm.support.ShellSort; kWFR(J&R
Lrq&k40y
/** V EzIWNV
* @author treeroot o;fQ,rP%
* @since 2006-2-2 ^-ZqS
* @version 1.0 o/R-1\Dn
*/ Wm61
public class SortUtil { s/V[tEC*z
public final static int INSERT = 1; t&_lpffv
public final static int BUBBLE = 2; [z\*Zg
public final static int SELECTION = 3; :[doYizk:
public final static int SHELL = 4; lV8Mr6m
public final static int QUICK = 5; N5^:2ag
public final static int IMPROVED_QUICK = 6; +Q.[W`goV
public final static int MERGE = 7; M:x(_Lu
public final static int IMPROVED_MERGE = 8; v;SJgZK
public final static int HEAP = 9; zw?6E8$h
C$8=HM3
public static void sort(int[] data) { e 6*=Si}V
sort(data, IMPROVED_QUICK); *3|KbCX
} NQmDm!-4
private static String[] name={ zx27aZ[
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" Ax ^9J)C
}; \;}dSSB1
"TPMSx&Ei
private static Sort[] impl=new Sort[]{ o%:eYl
new InsertSort(), -UO$$)Q
new BubbleSort(), o&=m]hKpQl
new SelectionSort(), 6o!"$IH4
new ShellSort(), ^IpS 3y
new QuickSort(), mYCGGwD
new ImprovedQuickSort(), RaAq>B WPr
new MergeSort(), pS0T>r
new ImprovedMergeSort(), b> |oU
new HeapSort() -Db(
}; g(1'i1
Uu ,Re
public static String toString(int algorithm){ ~c4Y*]J
return name[algorithm-1]; Ae1},2py
} "'%x|nB
xfb%bkr
public static void sort(int[] data, int algorithm) { J#\/znT
impl[algorithm-1].sort(data); ~jgd92`{z
} "='|c-x
wjkN%lPfvj
public static interface Sort { p~t$ll0s
public void sort(int[] data); rie1F,
} \C#Vh7z"2&
'2NeuK-KD
public static void swap(int[] data, int i, int j) { YV+e];s
int temp = data; @I%m}>4Jm
data = data[j]; b+kb7
data[j] = temp; X:YxsZQ5Y
} Z=#!FZ{
} ^VA)vLj@