[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; 7n,*3;I
} Vnu*+
int i1=l; <lj;}@qQ<
int i2=mid+1; f?OFMac
for(int cur=l;cur<=r;cur++){ Ungex@s_
if(i1==mid+1) _%` )cOr
data[cur]=temp[i2++]; Hvto]~=GQ
else if(i2>r) tp-PE?
data[cur]=temp[i1++]; 2`XG"[@
else if(temp[i1] data[cur]=temp[i1++]; s3sAw~++
else u/5^N^@^
data[cur]=temp[i2++]; b42"Y,sbB
} h#ogL-UU
} e^?0uVxS1
pDlU*&
} Ka|WT|1
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改进后的归并排序: K/+Y9JP9
=}6yMR!4R<
package org.rut.util.algorithm.support; 6tC0F=
y6bl&_
import org.rut.util.algorithm.SortUtil; /T53"+7:0
{=5Wi|
/** e_Ue9c.}
* @author treeroot gZI88Q
* @since 2006-2-2 Flrpk`4
* @version 1.0 HB}!Lf#*P
*/ .""?k[f5Q
public class ImprovedMergeSort implements SortUtil.Sort { dX4"o?KD>
2E Ufd\
private static final int THRESHOLD = 10; 8Z{e/wnVF
uTgvMkO
/* MCBZq\c
* (non-Javadoc) K'6dlwn).
* "enGWIH
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) KiXRBFo
*/ F'!pM(+
public void sort(int[] data) { ]m _<lRye
int[] temp=new int[data.length]; ,P&.qg i=(
mergeSort(data,temp,0,data.length-1); 5 *8V4ca
} owz6j:
,i>{yrsOh
private void mergeSort(int[] data, int[] temp, int l, int r) { @+OX1-dd/w
int i, j, k; noali96J
int mid = (l + r) / 2; O_yk<
if (l == r) #nTzn2
return; llbf(!
if ((mid - l) >= THRESHOLD) ?Vy%<f$
mergeSort(data, temp, l, mid); lV4|(NQ9
else n]?KDID;
insertSort(data, l, mid - l + 1); A2fc_A/a
if ((r - mid) > THRESHOLD) v{/z`J!JR
mergeSort(data, temp, mid + 1, r); A4lW8&rHI
else C5q n(tv
insertSort(data, mid + 1, r - mid); o5NV4=
F}/tV7m
for (i = l; i <= mid; i++) { WInfn f+'
temp = data; :qfP>Ok
} Y[=X b
for (j = 1; j <= r - mid; j++) { 8F?6Aq1B
temp[r - j + 1] = data[j + mid]; F/91Es
} l[Hgh,
int a = temp[l]; `eD70h`XK
int b = temp[r]; T d E.e(
for (i = l, j = r, k = l; k <= r; k++) { gj(|#n5C
if (a < b) { Fx6c*KNX3
data[k] = temp[i++]; =l7@YCj5c
a = temp; f6\`eLGi1
} else { cym<uh-Wg^
data[k] = temp[j--]; cPFs K*w
b = temp[j]; fl8~*\;Xu
} M0+xl+c+
} 4f)B@A-
} P!c.!8C$
]LcCom:]
/** 4=BIYC"Lu
* @param data q5@N//<DNN
* @param l _,,w>q6K
* @param i _>b=f
*/ 6ol*$Q"z
private void insertSort(int[] data, int start, int len) { 'T!^H
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); Pdq}~um3{
} /2%646
} })v`` +
} )=~OP>7B
} NNOemTh
rKhhx
堆排序： 0|a,bwZ
mE|?0mRA %
package org.rut.util.algorithm.support; XfYMv38(
%QYH]DR
import org.rut.util.algorithm.SortUtil; {WYJQKs8
aR- ?t14
/** (:g ZZG
* @author treeroot gK_^RE9~
* @since 2006-2-2 ]~YY#I":
* @version 1.0 F'~\!dNL
*/ apz)4%A
public class HeapSort implements SortUtil.Sort{ 0bl?dOV{
S2;u!f
/* (non-Javadoc) \ 5&-U@
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) +4*3aWf`
*/ d[0R#2y=
public void sort(int[] data) { i[IOR0
MaxHeap h=new MaxHeap(); E.Vlz^B
h.init(data); *Y:;fl +v
for(int i=0;i h.remove(); -o+<m4he
System.arraycopy(h.queue,1,data,0,data.length); jDWmI%Y.
} *VuiEBG
>/BMA;`
private static class MaxHeap{ AmyZ9r#{
!R`E+G@
void init(int[] data){ ktA5]f;
this.queue=new int[data.length+1]; x6qQ Y<>
for(int i=0;i queue[++size]=data; Whd\Ub8(
fixUp(size); u~]O #v
} uK6'TJ
} n'5LY9"
;2k!KW@
private int size=0; o)V@|i0Js
Z9)-kRQz=r
private int[] queue; EE{]EW(
*F^t)K2
public int get() { /h(bMbZ
return queue[1]; NFsCq_f
} DN$[rCi7
6rP?$mn2
public void remove() { Ha)Vf+W
SortUtil.swap(queue,1,size--); uht>@ WSg|
fixDown(1); ehpU`vQz
} l_2B
file://fixdown nT:F{2 M;
private void fixDown(int k) { ^uV=|1<%
int j; iaV%*
while ((j = k << 1) <= size) { ~Y_5q)t(
if (j < size %26amp;%26amp; queue[j] j++; [C0"vOTUb
if (queue[k]>queue[j]) file://不用交换 X_\$hF
break; PwC9@c%c
SortUtil.swap(queue,j,k); |7$Q'3V
k = j; B-1Kfc
} D;Bij=
} Qo5yfdR
private void fixUp(int k) { fe3a_gYPz
while (k > 1) { \cr)O^&
int j = k >> 1; (i1q".
if (queue[j]>queue[k]) ['%$vnS5S
break; pXhN?joe
SortUtil.swap(queue,j,k); ] >4CBm$
k = j; p=d,kY
} Y9SaYSX
} !q8"Q t
M(|6YF7u
} y0R9[;b07
* YR>u@
} gj@>9
Bo4MoSF}
SortUtil： `'vNHY
kM;}$*?
package org.rut.util.algorithm; r+W;}nyf
=^5#o)~BB
import org.rut.util.algorithm.support.BubbleSort; v[b|J7k
import org.rut.util.algorithm.support.HeapSort; h`@z61UI
import org.rut.util.algorithm.support.ImprovedMergeSort; p[8H!=`K
import org.rut.util.algorithm.support.ImprovedQuickSort; _g]h \3
import org.rut.util.algorithm.support.InsertSort; =j!nt8]8
import org.rut.util.algorithm.support.MergeSort; cD5N'3
import org.rut.util.algorithm.support.QuickSort; ev[!:*6P
import org.rut.util.algorithm.support.SelectionSort; Q>yO,H|
import org.rut.util.algorithm.support.ShellSort; [sXnB$
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/** Njmb{L]Cps
* @author treeroot e`eh;@9p
* @since 2006-2-2 0-~F%:x
* @version 1.0 uE ^uP@d
*/ "MPr'3
public class SortUtil { $lAQcG&Q
public final static int INSERT = 1; :m[HUh
public final static int BUBBLE = 2; 3n)\D<f]#
public final static int SELECTION = 3; tE$oV
public final static int SHELL = 4; ;[q>
public final static int QUICK = 5; +'"NKZ.>TT
public final static int IMPROVED_QUICK = 6; = tY%k!R
public final static int MERGE = 7; 89YG `
public final static int IMPROVED_MERGE = 8; sHPK8Wsg
public final static int HEAP = 9; Qm)c!
S^:7V[=EgI
public static void sort(int[] data) { =KW~k7TaN
sort(data, IMPROVED_QUICK); 3>#io^35
} Jz@2?wSp
private static String[] name={ ,c&%/"i:w
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" O|mWQp^?q
}; [+wLy3_
8=,?Bh".
private static Sort[] impl=new Sort[]{ Ro.br:'Bw
new InsertSort(), P_F0lO
new BubbleSort(), }Ryrd!3bY
new SelectionSort(), [l*;+N+
new ShellSort(), APv& ^\oUH
new QuickSort(), &`2$,zX#
new ImprovedQuickSort(), c9ea%7o{0a
new MergeSort(), Vif)e4{Pn
new ImprovedMergeSort(), ~93#L_V_O
new HeapSort() I~&*8)xM
}; ?hOvY)
`s\E"QeZN
public static String toString(int algorithm){ KN:V:8:J
return name[algorithm-1]; m+EtB6r
} Kwo0%2Onkd
+(m*??TAV
public static void sort(int[] data, int algorithm) { GDwijZw
impl[algorithm-1].sort(data); h%ba!
} :OD-L)Or
k&pV`.Imi
public static interface Sort { #^9a[ZLj0
public void sort(int[] data); tKCX0UZ'
} ,xg(F0q
;0nL1R]w(
public static void swap(int[] data, int i, int j) { C4|H5H
int temp = data; yaK4% k
data = data[j]; ,D93A
data[j] = temp; +-PFISa<r
} O6b.oS'-
} q\d/-K