[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; Q|G[9HBI
} '`o+#\,b^%
int i1=l; m@c2'*&Y
int i2=mid+1; w-nkf M~
for(int cur=l;cur<=r;cur++){ ^ O`
if(i1==mid+1) 9DtSYd/
data[cur]=temp[i2++]; E$G"R=
else if(i2>r) [=E<iPl
data[cur]=temp[i1++]; .Yu,&HR
else if(temp[i1] data[cur]=temp[i1++]; d&'6l"${
else @pkozE-
data[cur]=temp[i2++]; &(.ZHF
} Ra*9d]N@
} BLJ-'8G
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} 5d4-95['_
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改进后的归并排序: wOk:Q4OjL
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package org.rut.util.algorithm.support; |R[m&uOib
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import org.rut.util.algorithm.SortUtil; cL WM]\Y
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/** vOP[ND=T
* @author treeroot *@Qt*f
* @since 2006-2-2 v^E5'M[A
* @version 1.0 oL6_Ya
*/ 3> fuH'=
public class ImprovedMergeSort implements SortUtil.Sort { ja>Tnfu
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private static final int THRESHOLD = 10; er<~dqZ}]
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/* $Y4 Ao-@
* (non-Javadoc) '",5Bu#C
* 0CN.gu
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) W4|;JmT.r
*/ QWP_8$Q
public void sort(int[] data) { &`%C'KZ
int[] temp=new int[data.length]; 7v:;`6Jb
mergeSort(data,temp,0,data.length-1); %Mu dc
} {"y6l
3~S~)quwP
private void mergeSort(int[] data, int[] temp, int l, int r) { O0I/^
int i, j, k; ,#m\W8j
int mid = (l + r) / 2; x-W0 h
if (l == r) L`p[Dq.
return; 5s|gKM
if ((mid - l) >= THRESHOLD) Cv=0&S.
mergeSort(data, temp, l, mid); lubS{3<
else 7)]G"m{
insertSort(data, l, mid - l + 1); fAm2ls7c
if ((r - mid) > THRESHOLD) lk'RWy"pw
mergeSort(data, temp, mid + 1, r); =Vv{td
else & 3a+6!L[
insertSort(data, mid + 1, r - mid); l%:_#1?isf
"h#=ctCx"
for (i = l; i <= mid; i++) { F`N*{at
temp = data; 2-6-kS)c
} O|/tRkDMP{
for (j = 1; j <= r - mid; j++) { lDA%M3(p
temp[r - j + 1] = data[j + mid]; :=8vy
} RU'J!-w{
int a = temp[l]; HvngjP{>
int b = temp[r]; I[|I\tW
for (i = l, j = r, k = l; k <= r; k++) { ["7}u^z@<+
if (a < b) { <*\J 6:^n
data[k] = temp[i++]; _\<M58/z
a = temp; +l#2u#e
} else { !`WuLhB`
data[k] = temp[j--]; $ S49v
b = temp[j]; Xgm7>=l
} 7D^A:f
} BKTsc/v2>:
} Psv!`K
xWMMHIu
/** nk{1z\D{
* @param data *!Dzst-J3
* @param l v$cD!`+k
* @param i ;Cy@TzO/|
*/ ibq@0CR
private void insertSort(int[] data, int start, int len) { rx"zqm9 }u
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); Gg+>_b{S5T
} tEUmED0FY
} VuY.})+J:
} kmS8>O
} )eFK@goGeb
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堆排序： F~Li.qF
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package org.rut.util.algorithm.support; j0GI[#
p#kC#{<nE
import org.rut.util.algorithm.SortUtil; s5pY)6)
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/** 2*M*<p=v
* @author treeroot x\%egw
* @since 2006-2-2 xv:?n^yt.[
* @version 1.0 MXy{]o_H~
*/ aI<~+]
public class HeapSort implements SortUtil.Sort{ 1gE`_%?K
bm4W,
/* (non-Javadoc) 1mX*0>
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 1 W0;YcT]
*/ x6t;=
public void sort(int[] data) { |^F-.Z
MaxHeap h=new MaxHeap(); eZ!k'bS=
h.init(data); Vo%d;>!G\;
for(int i=0;i h.remove(); H@zk8]_P
System.arraycopy(h.queue,1,data,0,data.length); _x!pMj(A
} 9ZBF1sMg
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private static class MaxHeap{ (Ka#6
d}ZHY[
void init(int[] data){ {ZcZ\Q;6
this.queue=new int[data.length+1]; dc05,Bz
for(int i=0;i queue[++size]=data; z)%1i
fixUp(size); lK4+8VZ
} 4(R2V]
} fo.m&mKgo
_a&|,ajy>
private int size=0; .H"hRYPC?
\p$0
private int[] queue; j1ZFsTFMWp
qo@dFKy
public int get() { /Uc*7Y5j
return queue[1]; |$PLZ,
} US4Um>j
q}5A^QX
public void remove() { ~S3eatM$9
SortUtil.swap(queue,1,size--); \ax%I)3
fixDown(1); }kj6hnQ
} L|X5Ru
file://fixdown ^NDX4d;
private void fixDown(int k) { 7mM;Q
int j; aJ8pJ{,P
while ((j = k << 1) <= size) { %U GlAyj
if (j < size %26amp;%26amp; queue[j] j++; >v[(w1?rX
if (queue[k]>queue[j]) file://不用交换 9HX+sB M
break; {n]sRz
SortUtil.swap(queue,j,k); H#inr^Xa
k = j; E: GJ$I
} S F>D:$a
} .jp]S4~
private void fixUp(int k) { \#aVu^`eX
while (k > 1) { ?^~"x.<nr
int j = k >> 1; yUO|3ONT
if (queue[j]>queue[k]) {ZXC%(u
break; PoJ$%_a}
SortUtil.swap(queue,j,k); $hSZ@w|IF
k = j; :2E1aVo4b
} j&A3s{S4A
} opMUt,4
2~V Im#
} ZRB 0OH
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} t\i1VXtO
=[JN'|Q+
SortUtil： sw|:Z(`
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package org.rut.util.algorithm; `fZD%o3l
2HXKz7da
import org.rut.util.algorithm.support.BubbleSort; R`2A-c
import org.rut.util.algorithm.support.HeapSort; L]d@D0.Z
import org.rut.util.algorithm.support.ImprovedMergeSort; N;'HR)
import org.rut.util.algorithm.support.ImprovedQuickSort; s.`d<(X?
import org.rut.util.algorithm.support.InsertSort; T3./V0]\I
import org.rut.util.algorithm.support.MergeSort; 8[)]3K x
import org.rut.util.algorithm.support.QuickSort; 6#M0AG
import org.rut.util.algorithm.support.SelectionSort; -vHr1I<
import org.rut.util.algorithm.support.ShellSort; SFk#bh
Jv<$AI
/** N?;o_^C
* @author treeroot `mjx4Lb
* @since 2006-2-2 7[g;|(G0
* @version 1.0 rxj@NwAno
*/ ).C!
public class SortUtil { Wk\@n+Q{]
public final static int INSERT = 1; ^Pd37&B4V
public final static int BUBBLE = 2; T[-c|
public final static int SELECTION = 3; ]M;6o@hq
public final static int SHELL = 4; @b\ S.
public final static int QUICK = 5; .vS6_
public final static int IMPROVED_QUICK = 6; 1?|6odc
public final static int MERGE = 7; b$O_L4CP
public final static int IMPROVED_MERGE = 8; 9K':Fn2,
public final static int HEAP = 9; lt6;*z[
UZP6x2:=
public static void sort(int[] data) { _i[)$EgFm
sort(data, IMPROVED_QUICK); -'[(Uzj
} Wi[m`#
private static String[] name={ -I-Uh{)j
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" *3O>J"
}; zN+*R;Ds
=kh>s$We
private static Sort[] impl=new Sort[]{ N4mJU'_{
new InsertSort(), s;2/Nc
new BubbleSort(), ~59`S#ax/l
new SelectionSort(), M+;P?|a
new ShellSort(), +}QBzGW`
new QuickSort(), PCPf*G>
new ImprovedQuickSort(), rLh9`0|D
new MergeSort(), VS|("**
new ImprovedMergeSort(), X@qk>/
new HeapSort() 7sc<dM
}; R pI<]1
ggI=I<7M
public static String toString(int algorithm){ s)YP%vn#
return name[algorithm-1]; zLQ#GF
} RO{@RhnV
F|l`YtZZd
public static void sort(int[] data, int algorithm) { =6L*!JP<
impl[algorithm-1].sort(data); `{U%[$<[W
} y[p$/$bgC5
ml.;wB|
public static interface Sort { #M?F^u[
public void sort(int[] data); Ah>gC!F^
} o}MzqKfu
Sf&?3a+f
public static void swap(int[] data, int i, int j) { jD/7/G*
int temp = data; XDkS ^9
data = data[j]; M6]0Y@@>
data[j] = temp; 6W;?8Z_1
} {(Og/[
} %,,`N I{