[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; (u$Q
} m2VF}% EIr
int i1=l; 2&5"m;<
int i2=mid+1; {mueP6Gz@J
for(int cur=l;cur<=r;cur++){ (obeEH5J
if(i1==mid+1) }HXNhv-K
data[cur]=temp[i2++]; ]M= 3Sn8}
else if(i2>r) x{&Z|D_CM
data[cur]=temp[i1++]; .eJ4F-V
else if(temp[i1] data[cur]=temp[i1++]; Vh'H5v^
else HM--`RJ
data[cur]=temp[i2++]; $7PFos%@
} j7O7P+DmS
} #msk'MVt
oIbd+6>f
} PVV\@
i' N
改进后的归并排序: 13
n;!t?jnf.
package org.rut.util.algorithm.support; :IS]|3wD
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import org.rut.util.algorithm.SortUtil; SRj|XCd
[\. ho9
/** #9p{Y}2#
* @author treeroot "1`c^
* @since 2006-2-2 @KNp?2a
* @version 1.0 O2A Z|[*I
*/ ~M43#E[oOF
public class ImprovedMergeSort implements SortUtil.Sort { G|X1c}zAL
%'t~+_
private static final int THRESHOLD = 10; I[&z#foN=w
l<^#@SH
/* dkRJ^~
* (non-Javadoc) c+-L>dsss
* 30[?XVI&
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) H VG'v>s@
*/ K+Ehj(eF
public void sort(int[] data) { Yc\;`C
int[] temp=new int[data.length]; {f)",#
mergeSort(data,temp,0,data.length-1); {P-KU RQ
} blxH`O!
-Z]?v3 9
private void mergeSort(int[] data, int[] temp, int l, int r) { nQg6 j Zf
int i, j, k; %,>> <8
int mid = (l + r) / 2; /1Rm^s)2z
if (l == r) cdzMao
return; ^K&&O{
if ((mid - l) >= THRESHOLD) t~XwF(";
mergeSort(data, temp, l, mid); a<c %Xy/
else g24)GjDi
insertSort(data, l, mid - l + 1); [4(TG<I
if ((r - mid) > THRESHOLD) [#uX{!q'
mergeSort(data, temp, mid + 1, r); D='/-3f!F]
else --.:eFE/
insertSort(data, mid + 1, r - mid); MT;<\T
Q_LPLmM
for (i = l; i <= mid; i++) { IN`05Q
temp = data; fm:/}7s
} ':F{st>&H
for (j = 1; j <= r - mid; j++) { *1}9`$
temp[r - j + 1] = data[j + mid]; "D8xHHb
} uXu'I
int a = temp[l]; q^Oq:l$s
int b = temp[r]; N$?mula
for (i = l, j = r, k = l; k <= r; k++) { /gXli)
if (a < b) { .|KxQn}
data[k] = temp[i++]; -twIF49
a = temp; GVn7#0x
} else { ,GZ(>|
data[k] = temp[j--]; yq\)8Fe
b = temp[j]; ~"brfjd|
} hSr#/dw&
} p;BdzV>
} 4$d|}ajH
<}N0y*m
/** '-gk))u>)
* @param data :3{@LOil^
* @param l Og"50-
* @param i $fuFx8`2W
*/ uoaF(F-
private void insertSort(int[] data, int start, int len) { 8uS1HE\%
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); NzNAhlXj3
} xg\M9&J
} y.w/7iw:
} M)Tv(7
} a5z.c_7r
+;U}SR<
堆排序： pShSKRg
E^#|1Kpq
package org.rut.util.algorithm.support; U:gE:tf
hG&RGN_<6+
import org.rut.util.algorithm.SortUtil; 2%1g%
!W]># Pm
/** G:A~nv9
* @author treeroot 8+v6%,K2
* @since 2006-2-2 {Kd9}CDAZ
* @version 1.0 Z(*nZT,
*/ bHWy9-
public class HeapSort implements SortUtil.Sort{ X#1So.}c
}B^s!y&b
/* (non-Javadoc) ZEUd?"gaR
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) :a#]"z0
*/ Y5cUOfYT
public void sort(int[] data) { DV*8Mkzg
MaxHeap h=new MaxHeap(); Nr3td`;
h.init(data); %v :a
for(int i=0;i h.remove(); pRUN[[L
System.arraycopy(h.queue,1,data,0,data.length); c{rX7+bN
} m!N_TOl-^
H,KU!1p
private static class MaxHeap{ 9"_qa q
OQW#BBet@
void init(int[] data){ 1\kOjF)l
this.queue=new int[data.length+1]; J A4'e@
for(int i=0;i queue[++size]=data; 5|S|HZ8G
fixUp(size); >UWLT;N/W
} RZm5[n
} 0MrtJNF]_O
-H'_%~OV(
private int size=0; c@5fiRPv!
7 fqK{^L
private int[] queue; _6^vxlF
7b:oz3?PI
public int get() { |C7GI[P
return queue[1]; X\X
} ZCbxL.fFz
m$pXe<
public void remove() { Ai(M06P:h
SortUtil.swap(queue,1,size--); IP&En8W+
fixDown(1); >OZ+k(saL
} .eK1xwhJ
file://fixdown i "62+
private void fixDown(int k) { 4h:Oo
int j; G/2@Mn-
while ((j = k << 1) <= size) { L>xcgV7
if (j < size %26amp;%26amp; queue[j] j++; [UR+G8X21m
if (queue[k]>queue[j]) file://不用交换 5}e-\:J>B
break; CH`4FR.-
SortUtil.swap(queue,j,k); B~u{LvTE
k = j; ElqHZ$a?
} >^D"%Oj y
} [M@i,d-;A
private void fixUp(int k) { >`'#4!}G5j
while (k > 1) { ZV_mP'1*
int j = k >> 1; pc:K5 -Os
if (queue[j]>queue[k]) 0wAZ9AxA{
break; ruB&&C6)v
SortUtil.swap(queue,j,k); sZ]O&Za~
k = j; mZ ONxR6q$
} 3(E"$Se,f
} ;9=9D{-4+
)&se/x+
} c^A3|tCi
uC 5mxZ
} 4kxy7]W
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SortUtil： <kPU*P,
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package org.rut.util.algorithm; j05ahquI
qqS-0U2
import org.rut.util.algorithm.support.BubbleSort; hKt AvTg
import org.rut.util.algorithm.support.HeapSort; \dbpCZ
import org.rut.util.algorithm.support.ImprovedMergeSort; Vu^J'>X
import org.rut.util.algorithm.support.ImprovedQuickSort; /uW6P3M
import org.rut.util.algorithm.support.InsertSort; \eI )(,A
import org.rut.util.algorithm.support.MergeSort; f*2V
import org.rut.util.algorithm.support.QuickSort; |cWW5\/
import org.rut.util.algorithm.support.SelectionSort; AG/nX?u7)t
import org.rut.util.algorithm.support.ShellSort; w+2:eFi=/
7.8ukAud
/** RTHdL
* @author treeroot [^1;8Tbk
* @since 2006-2-2 kxThtjgv
* @version 1.0 wf6ZzG:
*/ 9n|H%AC
public class SortUtil { xqmJPbA
public final static int INSERT = 1; %}+j4n
public final static int BUBBLE = 2; Y\dK-M{$
public final static int SELECTION = 3; $hg W>e
public final static int SHELL = 4; "aB]?4
public final static int QUICK = 5; yr[iAi"
public final static int IMPROVED_QUICK = 6; kx]f`b
public final static int MERGE = 7; a!Z,~ V8
public final static int IMPROVED_MERGE = 8; |1-0x%@[;
public final static int HEAP = 9; ?n?Ep[D
lOI(+74
public static void sort(int[] data) { 8 x|NR?
sort(data, IMPROVED_QUICK); Vnv<]D zC
} p9oru0q
private static String[] name={ e9k}n\t3
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 2ZNTg@o
}; 0(@8
g#9KG
private static Sort[] impl=new Sort[]{ /<zBcpVNV
new InsertSort(), n KDX=73
new BubbleSort(), +3]@0VM26;
new SelectionSort(), m-*du(
new ShellSort(), 6LNm>O
new QuickSort(), 9);a0}*5
new ImprovedQuickSort(), _S2QY7/
new MergeSort(), "MZVwl"E#
new ImprovedMergeSort(), Lo7R^>
new HeapSort() /LPSI^l!m
}; sBZKf8@/
:*A6Ba
public static String toString(int algorithm){ Zo-s_6uC
return name[algorithm-1]; UZmzk
} py P5^Qv
!_l W#feR
public static void sort(int[] data, int algorithm) { ]c[80F-
impl[algorithm-1].sort(data); 'ZTE"KT
} .~ZNlI {K
aR*z5p2-w
public static interface Sort { G80d!*7
public void sort(int[] data); 4K[U*-\"
} 'S@h._q
t+q:8HNh
public static void swap(int[] data, int i, int j) { Q4CxtY
int temp = data; q:J,xC_sF(
data = data[j]; 4=*VXM/
data[j] = temp; NnrX64|0
} jP@H$$-=wH
} ylmf^G@JC