[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; hsHtLH+@
} n8 e4`-cY
int i1=l; .9KW|(uW
int i2=mid+1; Nj|~3 *KO
for(int cur=l;cur<=r;cur++){ z+F:_
if(i1==mid+1) O:Ob{k
data[cur]=temp[i2++]; bZi;jl
else if(i2>r) `)_11ywZ
data[cur]=temp[i1++]; iYl$25k/1
else if(temp[i1] data[cur]=temp[i1++]; @d_;p<\l
else V9<CeTl'
data[cur]=temp[i2++]; (]*!`(_b
} 2Wq/_:
} u}BN)%`B
hP26Bb1
} :j(D&?ao
Z=CY6Zu7
改进后的归并排序: C;.+ kE
S[L2vM)
package org.rut.util.algorithm.support; d&5GkD.P
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import org.rut.util.algorithm.SortUtil; Dd$CN&Ca
Oky9GC.a
/** 0fU^
* @author treeroot X]AbBzy
* @since 2006-2-2 } P/ x@N
* @version 1.0 DU.[Sp
*/ R22P ol
public class ImprovedMergeSort implements SortUtil.Sort { U&<w{cuA
}doJ=lc
private static final int THRESHOLD = 10; =OU]<%
XqK\'8]\Mw
/* t4CI+fqy
* (non-Javadoc) PbN"+qM
* 3+| {O
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ]z_C7Y"4BR
*/ 1[r;
public void sort(int[] data) { {qkd63X
int[] temp=new int[data.length]; ufWd)Q
mergeSort(data,temp,0,data.length-1); }%I)bU
} 9\[A%jp#K@
"J (.dg]"
private void mergeSort(int[] data, int[] temp, int l, int r) { m1(cN%DBd
int i, j, k; NK0hT,_
int mid = (l + r) / 2; bLpGrGJs
if (l == r) ?{M!syD<
return; 9dXtugp|
if ((mid - l) >= THRESHOLD) a?QDf5Cq
mergeSort(data, temp, l, mid); 6 w:@i_2^
else jt8% L[
insertSort(data, l, mid - l + 1); ~ E|L4E
if ((r - mid) > THRESHOLD) yNu%D$6u7
mergeSort(data, temp, mid + 1, r); J>Uzd, /
else i&dMX:fRd
insertSort(data, mid + 1, r - mid); x#s=eeP1
VIjsz42C
for (i = l; i <= mid; i++) { 58 Rmq/6s
temp = data; W9ewj:4\0
} sCF7K=a
for (j = 1; j <= r - mid; j++) { 6X.lncE@p
temp[r - j + 1] = data[j + mid]; !rMl" Y[
} 4$<-3IP,
int a = temp[l]; ^>fjURR
int b = temp[r]; 7,N>u8cTh
for (i = l, j = r, k = l; k <= r; k++) { #Zy-X_r
if (a < b) { )wwQv2E
data[k] = temp[i++]; X[ o9^<
a = temp; "x$RTuWA9
} else { KGI0|Z]n~
data[k] = temp[j--]; 7VwLyy
b = temp[j]; P"WnU'+
} ] x_WO_
} Aa;s.:?
} d.3O1TXK
6hs2B5)+
/** j!H\hj/]
* @param data n/3gx4.g
* @param l t"@:a Y"
* @param i _,M:"3;Z
*/ #j{!&4M
private void insertSort(int[] data, int start, int len) { L('G1J}
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); ,~_)Cf#CB
} F+@E6I'g
} a+CHrnU\;
} $*{$90Q
} i-EFq@xl
c=T^)~$$
堆排序： @9QtK69
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package org.rut.util.algorithm.support; 6*,8 H&
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import org.rut.util.algorithm.SortUtil; {&Fh$H!
wZECG-jr/
/** b:}`O!UBw
* @author treeroot ZTx~+'(
* @since 2006-2-2 Y@S?0
* @version 1.0 /WVnyz0
*/ |WB<yA1
public class HeapSort implements SortUtil.Sort{ MKdBqnM(F
ZN2g(
/* (non-Javadoc) X]Emz"
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 3?vasL
*/ QJ ueU%|
public void sort(int[] data) { <~}t;ji
MaxHeap h=new MaxHeap(); qG/a5i
h.init(data); 7FVu[Qu
for(int i=0;i h.remove(); ^#R-_I
System.arraycopy(h.queue,1,data,0,data.length); nNIV(
} _ID2yJ
Oifu ?f<r
private static class MaxHeap{ X"W%(x`w
'wAOY
void init(int[] data){ =$g8"[4
this.queue=new int[data.length+1]; 22|f!la8n
for(int i=0;i queue[++size]=data; ~7!J/LHg
fixUp(size); %3i/PIN
} =De%]]>
} g]V}azLr
1@Bq-2OD4
private int size=0; j}chU'if
W&]grG2/
private int[] queue; Z3G>DF:$
PiZt?r?5w|
public int get() { -0Q:0wU
return queue[1]; 0:**uion
} :XMw="u=
Lrz>0_Q
public void remove() { 0*%j6*XDq9
SortUtil.swap(queue,1,size--); 3R?7&oXvH
fixDown(1); WIo^=?%
} 1{%EQhNd
file://fixdown 2;4Of~
private void fixDown(int k) { qeCx.Z
int j; ]do0{I%\eq
while ((j = k << 1) <= size) { ";j/k9DE
if (j < size %26amp;%26amp; queue[j] j++; ehXj.z
if (queue[k]>queue[j]) file://不用交换 M"K$81
break; aT F}
SortUtil.swap(queue,j,k); QzIK580%t
k = j; 4T6dju
} vhEPk2wD,
} g?M\Z";
private void fixUp(int k) { v'.?:S&m
while (k > 1) { $.(>Sj1
int j = k >> 1; O@3EJkv
if (queue[j]>queue[k]) 9c806>]U^
break; @3[Z QF
SortUtil.swap(queue,j,k); pCA(>(
k = j; V5K!u8T
} :XF;v
} Wn24eld"x
SPL72+S`,
} N40.GL0s
q:-8W[_
} $qy%Q]
'R~x.NM
SortUtil： '@HWp8+
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package org.rut.util.algorithm; [e ;K$
:n>m">4
import org.rut.util.algorithm.support.BubbleSort; XN]kNJX
import org.rut.util.algorithm.support.HeapSort; :SSe0ZZ_6b
import org.rut.util.algorithm.support.ImprovedMergeSort; J']1^"_'
import org.rut.util.algorithm.support.ImprovedQuickSort; /wI$}X5o~
import org.rut.util.algorithm.support.InsertSort; p0uQ>[NV0
import org.rut.util.algorithm.support.MergeSort; 0<Px2/
import org.rut.util.algorithm.support.QuickSort; @g""*T1:$
import org.rut.util.algorithm.support.SelectionSort; v%V$@MF
import org.rut.util.algorithm.support.ShellSort; ^o|igyS9
,g{`M]Ov
/** TH)gW
* @author treeroot G F,/<R#
* @since 2006-2-2 w*Sl
* @version 1.0 FgQd7p
*/ 52K3N^RgR
public class SortUtil { 6ndt1W z
public final static int INSERT = 1; j$zw(EkN
public final static int BUBBLE = 2; " 9 h]P^
public final static int SELECTION = 3; vhZpYW8
public final static int SHELL = 4; d/- f]
public final static int QUICK = 5; <<v,9*h
public final static int IMPROVED_QUICK = 6; vgHMVzxj
public final static int MERGE = 7; +WK!}xZR
public final static int IMPROVED_MERGE = 8; NXDdU^w7B
public final static int HEAP = 9; SwG:?T!"}
UL(R/yc
public static void sort(int[] data) { //>f#8Ho
sort(data, IMPROVED_QUICK); +K;(H']Z<-
} `pm6Ts{,
private static String[] name={ A%oHx|PD
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" a7nbGqsx
}; (<(8(}x
2>.B*P
private static Sort[] impl=new Sort[]{ r.[!n)*
new InsertSort(), vl2!2X
new BubbleSort(), hFZ7{pj
new SelectionSort(), UbJ_'>hK6
new ShellSort(), }!(cm;XA"
new QuickSort(), 0~R0)Q,
new ImprovedQuickSort(), >Rjk d>K3
new MergeSort(), O@'/B" &
new ImprovedMergeSort(), \NS\>Q+d
new HeapSort() S*IF/ fu
}; ]gHw;ry
%-i2MK'A
public static String toString(int algorithm){ QgC
return name[algorithm-1]; jw5Bbyk
} W<xu*U(A
)O"5dF1l
public static void sort(int[] data, int algorithm) { ^4O1:_|G
impl[algorithm-1].sort(data); 4At%{E
} Obrv5%'
V3xC"maA@
public static interface Sort { gx#xB8n
public void sort(int[] data); `3SY~&X
} W7S`+Pq
7P?z{x':T
public static void swap(int[] data, int i, int j) { 0tC+?
int temp = data; GG5wiN*2S
data = data[j]; #<S+E7uTs
data[j] = temp; 4EJ
} nxKV7d@R
} votv rZ=