[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; >r}Vf9 5[N
} (U9a@1
int i1=l; nk/vGa4
int i2=mid+1; CDCC1BG"
for(int cur=l;cur<=r;cur++){ S#2[%o
if(i1==mid+1) ;_tO+xL&
data[cur]=temp[i2++]; vr4S9`,
else if(i2>r) hW' HT
data[cur]=temp[i1++]; [cpNiw4e
else if(temp[i1] data[cur]=temp[i1++]; _tWE8r,
else {ERjeuDm]
data[cur]=temp[i2++]; v8'5pLt"
} (oYW]c}G,
} 6N3@!xtpi
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} /80YZ
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改进后的归并排序: Ef,Cd[]b
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package org.rut.util.algorithm.support; jVYH;B%%z
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import org.rut.util.algorithm.SortUtil; 6mHhC?
zYr z08PJ
/** 7cw]v"iv
* @author treeroot aQ|hi F}
* @since 2006-2-2 Euu ,mleM
* @version 1.0 M&[b.t*
*/ :hP58 }Q$
public class ImprovedMergeSort implements SortUtil.Sort { @T7PZB&xnl
eP= j.$
private static final int THRESHOLD = 10; oEIqA
l%<c6;
/* sykFSPy`'
* (non-Javadoc) %U?)?iZdL
* >EIrw$V$
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) %nQmFIt
*/ wPH+n-&e
public void sort(int[] data) { sX'nn
int[] temp=new int[data.length]; DL4iXULNY
mergeSort(data,temp,0,data.length-1); (\& 62B1
} J]\^QMX
|yv]Y/=
private void mergeSort(int[] data, int[] temp, int l, int r) { ]l&'k23~p
int i, j, k; ZNL5({lv
int mid = (l + r) / 2; }Vl^EAR
if (l == r) g;G5 r&T
return; )X%oXc&C|
if ((mid - l) >= THRESHOLD) !*bdG(pK
mergeSort(data, temp, l, mid); qTy v.#{y
else PL@7KDQ
insertSort(data, l, mid - l + 1); $5L(gn[
if ((r - mid) > THRESHOLD) Q>%E`h
mergeSort(data, temp, mid + 1, r); $W,zO|-
else }`]]b+_b>@
insertSort(data, mid + 1, r - mid); 61,O%lV
"tX7%(
for (i = l; i <= mid; i++) { gh61H:tkR
temp = data; w4A#>;Qu*
} mn`5pha
for (j = 1; j <= r - mid; j++) { XtzOFx/
temp[r - j + 1] = data[j + mid]; mATH*[Y
} "XB4yExy
int a = temp[l]; b9#m m
int b = temp[r]; ^U{P3%uZ
for (i = l, j = r, k = l; k <= r; k++) { JWWInuH
if (a < b) { A^L?_\e6
data[k] = temp[i++]; DaDUK?
a = temp; >~wu3q
} else { DaCblX
data[k] = temp[j--]; ~'{VaYk]v
b = temp[j]; |0]YA
} #[(gIOrNn8
} @ExLh9
} _.-#E$6s#q
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/** wPQ&Di*X}
* @param data wt\m+!u`
* @param l b=G4MZQ
* @param i <(?' s9
*/ g/B\ObY
private void insertSort(int[] data, int start, int len) { C(U
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); f-&ATTx`J
} :mn(0 R~
} $>![wZ3
} T+(M8qb
} R.O
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堆排序： XD 5n]AL
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package org.rut.util.algorithm.support; T;J7+0
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import org.rut.util.algorithm.SortUtil; \#2 s4RCji
7|{ B#
/** |zh +
* @author treeroot R)Q/Ff@o0
* @since 2006-2-2 ovbEmb
* @version 1.0 |SxMN%M!
*/ L7<+LA)s0
public class HeapSort implements SortUtil.Sort{ V&g)m.d:n
pbPz$Y
/* (non-Javadoc) 2+o!o
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) i`R(7Z
*/ 9lKRL'QR
public void sort(int[] data) { Ca X^)
MaxHeap h=new MaxHeap(); 9QC< E|
h.init(data); el}hcAY/RP
for(int i=0;i h.remove(); 27Cz1[oX
System.arraycopy(h.queue,1,data,0,data.length); k?<i*;7
} )U]:9)
}iMXXXBOT
private static class MaxHeap{ vUqe.?5
gt~9"I
void init(int[] data){ nT#37v
this.queue=new int[data.length+1]; ^u3*hl}YKy
for(int i=0;i queue[++size]=data; g%ZdIKj!
fixUp(size); }M^_Z#|,
} .l7j8}
} Gl.?U;4Z
b/z'`?[
private int size=0; 7,f:Qi@g
CcBQo8!G
private int[] queue; ]F !'M
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public int get() { -!@H["
return queue[1]; *3!(*F@M,
} hK Fk$A
MST:.x ;
public void remove() { y2U/$%B)G
SortUtil.swap(queue,1,size--); yq1Gqbh l
fixDown(1); EK^JLvyT
} eR7qE) h
file://fixdown =sxkrih
private void fixDown(int k) { L7X7Zt8%
int j; n'q aR<bY
while ((j = k << 1) <= size) { >y]?MGk
if (j < size %26amp;%26amp; queue[j] j++; +d.u##$
if (queue[k]>queue[j]) file://不用交换 pi|\0lH6W
break; _c[|@D
SortUtil.swap(queue,j,k); NAJ '><2
k = j; |!{z? i
} n; Lo
} lq~GcM
private void fixUp(int k) { zB;'_[8M
while (k > 1) { ,NjX&A@
int j = k >> 1; )ZQHa7V
if (queue[j]>queue[k]) u9esdOv
break; pTc$+Z73
SortUtil.swap(queue,j,k); >/(i3)
k = j; >?^~s(t
} s[Y)d>~\$=
} Xq+!eOT
.UNF~}^H
} " ]aQ Hh]f
>_rzT9gX&
} &B?@@6
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SortUtil： f+*J ue
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package org.rut.util.algorithm; d-9uv|SJ
,Y`'myL8W
import org.rut.util.algorithm.support.BubbleSort; <]Ij(+J;
import org.rut.util.algorithm.support.HeapSort; ,O$Z,J4VL
import org.rut.util.algorithm.support.ImprovedMergeSort; "2*G$\
import org.rut.util.algorithm.support.ImprovedQuickSort; qlz( W
import org.rut.util.algorithm.support.InsertSort; { z-5GH|
import org.rut.util.algorithm.support.MergeSort; :({-0&&_
import org.rut.util.algorithm.support.QuickSort; |Dl*w/n
import org.rut.util.algorithm.support.SelectionSort; q>Q:X3
import org.rut.util.algorithm.support.ShellSort; AM>Yj
l[tY,Y:4qO
/** &?P=arU
* @author treeroot it(LphB8
* @since 2006-2-2 \pjRv
* @version 1.0 ~5lKL5w
*/ 1~["{u
public class SortUtil { 1"8Z y6t
public final static int INSERT = 1; clh3
public final static int BUBBLE = 2; \4[c}l
public final static int SELECTION = 3; *ge].E
public final static int SHELL = 4; [5>S-Z
public final static int QUICK = 5; FQ;4'B^k]
public final static int IMPROVED_QUICK = 6; 1{SrHdD=
public final static int MERGE = 7; k98< s
public final static int IMPROVED_MERGE = 8; b:N^Fe
public final static int HEAP = 9; >2l13^Y
i /O1vU#
public static void sort(int[] data) { qZT 4+&y
sort(data, IMPROVED_QUICK); C><<0VhU
} '5|Q<5!o
private static String[] name={ @4 zi]v
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" dzjBUD
}; FRl3\ZDqrb
N?MJ#lC F
private static Sort[] impl=new Sort[]{ *u|lmALs
new InsertSort(), DhtU]w}
new BubbleSort(), Sqp;/&Ji
new SelectionSort(), LK'S)Jk
new ShellSort(), XM$5S+e
new QuickSort(), %8}WX@SB
new ImprovedQuickSort(), \_*?R,$3Y,
new MergeSort(), %JP&ox|^&
new ImprovedMergeSort(), dWzDSlP&
new HeapSort() nx!qCgo
}; c,v^A+sZu
"E@NZ*"u
public static String toString(int algorithm){ 9[epr+f
return name[algorithm-1]; .4S^nP
} J8sJ~FnUj
b>hBct}
public static void sort(int[] data, int algorithm) { kjLsk-
impl[algorithm-1].sort(data); ]y1$F Ir+
} _~X8/p/Qh
&^CL]&/
public static interface Sort { ?6gDbE%
public void sort(int[] data); 8! |.H p
} VYl_U?D
dCf'\@<<
public static void swap(int[] data, int i, int j) { hYP6z^
int temp = data; zh#OD{
data = data[j]; _1w.B8Lyz@
data[j] = temp; nvO%
} Lu8%qcC
} 7AGZu?1]M