[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; 4Q|>k)H
} <o(;~
int i1=l; Af|h*V4Xu
int i2=mid+1; -<g9) CV5
for(int cur=l;cur<=r;cur++){ OgF[=
if(i1==mid+1) CD`a-]6qA
data[cur]=temp[i2++]; g NI1W@)
else if(i2>r) t ed:]
data[cur]=temp[i1++]; ;8]HCC@:
else if(temp[i1] data[cur]=temp[i1++]; |;gx;qp4cN
else 8~'cP?
data[cur]=temp[i2++]; iXWHI3
} uKJ:)oyaCP
} w S
AzU:Dxr>.G
} j\uZo.Ot+
, 'pYR]3
改进后的归并排序: tiK M+ ;C
bQaRl=:[:
package org.rut.util.algorithm.support; Jq_\r'YE
EavBUX$O
import org.rut.util.algorithm.SortUtil; B7\4^6Tx
+Br<;sW
/** n_QuuUB
* @author treeroot .}dLqw
* @since 2006-2-2 /uw@o9`~2-
* @version 1.0 5U?O1}P
*/ QV[&2&&^<<
public class ImprovedMergeSort implements SortUtil.Sort { 5Q10Ohh
ZX_QnSNZ?
private static final int THRESHOLD = 10; mIlg=8:
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/* LK h=jB^bT
* (non-Javadoc) wkt4vE87
* qCI&H7u@
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) >k @t.PeoV
*/ 4!!|P
public void sort(int[] data) { maapX/J
int[] temp=new int[data.length]; <exCK*G
mergeSort(data,temp,0,data.length-1); &GH[$(
} [<B,6nAl
Sm/8VSY
private void mergeSort(int[] data, int[] temp, int l, int r) { C >OeULD
int i, j, k; wX] _Abk
int mid = (l + r) / 2; *"^X)Y{c+l
if (l == r) AH,?B*zGj
return; 2-F7tcya|
if ((mid - l) >= THRESHOLD) xU\!UVQ/
mergeSort(data, temp, l, mid); Ec7xwPk
else r9f- [wC
insertSort(data, l, mid - l + 1); \9+,ynJH8z
if ((r - mid) > THRESHOLD) I"]E}nd)
mergeSort(data, temp, mid + 1, r); YdI6|o@vc
else m-{DhJV
insertSort(data, mid + 1, r - mid); NZGO8u
whI4@#
for (i = l; i <= mid; i++) { R&uPoY,f
temp = data; 7] y3<t
} cC8$oCR?
for (j = 1; j <= r - mid; j++) { ihkZs3}
temp[r - j + 1] = data[j + mid]; *RY}e
} g!0 j1
int a = temp[l]; m0G"Aj
int b = temp[r]; xbiprhdv
for (i = l, j = r, k = l; k <= r; k++) { M.g2y&8
if (a < b) { >Iij,J5i
data[k] = temp[i++]; 2?,lr2
a = temp; dwn|1%D
} else { r,eH7&P9{
data[k] = temp[j--]; q;SD+%tI
b = temp[j]; v=^^Mr"Z^
} VmQ^F| {
} rbf5~sw&8+
} mpYBMSLM
!KV!Tkx h
/** " lD -*e4
* @param data R5sEQ| E
* @param l C5=^cH8
* @param i puOMtCI
*/ #7fOH U8v
private void insertSort(int[] data, int start, int len) { x.gzsd
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); |mhKD#:
} 1=]#=)+
} 2`i&6iz
} [CHN3&l-5S
} 5]{rim
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堆排序： ]FR#ZvM>x
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package org.rut.util.algorithm.support; <_/etw86Z
/:!sn-(
import org.rut.util.algorithm.SortUtil; 5+GTK)D
@!$xSH
/** 2-S}#S}2C
* @author treeroot #8d#Jw
* @since 2006-2-2 E.#JCO|(1
* @version 1.0 1mV ' ~W
*/ D*L@I@ [
public class HeapSort implements SortUtil.Sort{ pTAm}
;zqxDl_
/* (non-Javadoc) Vb 36R_u
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 8?~>FLWTXZ
*/ a[t"J*0
public void sort(int[] data) { V xN!Ki=
MaxHeap h=new MaxHeap(); DI{Qs[
h.init(data); #~Kno@
for(int i=0;i h.remove(); ?(s9dS,7wZ
System.arraycopy(h.queue,1,data,0,data.length); Jn(|.eT|
} O-AC$C[d
El}~3|a?
private static class MaxHeap{ )~)T[S
kb-XEJ}L
void init(int[] data){ ;180ct4
this.queue=new int[data.length+1]; 1xxTI{'g[
for(int i=0;i queue[++size]=data; BDN}`F[F
fixUp(size); JA >&$h
} *h?*RUQ
} BDp(&=ktq
axG%@5
private int size=0; NrcV%-+u%
B <Jxj
private int[] queue; RCkmxO;b&
<MxA;A
public int get() { }2=~7&)
return queue[1]; ({4?RtYm
} s]vsD77&
k]4CN
public void remove() { z'Bvjul
SortUtil.swap(queue,1,size--); p@$92> '
fixDown(1); `[=/f=Q}
} 1\TkI=N3
file://fixdown B \V;{:
private void fixDown(int k) { c3fd6Je5
int j; RaiYq#X/
while ((j = k << 1) <= size) { 8pmWw?
if (j < size %26amp;%26amp; queue[j] j++; .ErR-p=-
if (queue[k]>queue[j]) file://不用交换 ^b&hy&ag
break; E]Cm#B
SortUtil.swap(queue,j,k); X56.Y.
k = j; PtjAu
} ubl Y%{"
} 2%l(qfN9
private void fixUp(int k) { p,4S?cr>a
while (k > 1) { CyS.GdyP
int j = k >> 1; j"0TAYmXwu
if (queue[j]>queue[k]) TIV|7nKL
break; <95*z @
SortUtil.swap(queue,j,k); +C$wkx]
k = j; Vg7+G( ,
} AWZ4h,as{
} +SFo2Wdr43
*@ \LS!N
} Ob'[W;p)[w
[c>YKN2qa
} >wV2` 6
++kVq$9@y
SortUtil： O|;|7fCB\
6%VRQ#g!
package org.rut.util.algorithm; :2L-Nf
7r3EMX\#Qm
import org.rut.util.algorithm.support.BubbleSort; P\X$fD
import org.rut.util.algorithm.support.HeapSort; G!GGT?J
import org.rut.util.algorithm.support.ImprovedMergeSort; X)Rh&ui
import org.rut.util.algorithm.support.ImprovedQuickSort; K`R
import org.rut.util.algorithm.support.InsertSort; V=GP_^F
import org.rut.util.algorithm.support.MergeSort; r2;+ACwWf_
import org.rut.util.algorithm.support.QuickSort; w3Qil[rg
import org.rut.util.algorithm.support.SelectionSort; P= 26! b
import org.rut.util.algorithm.support.ShellSort; B?XqH_=0L
%tz foiJ%P
/** p-8x>dmP(
* @author treeroot 9H%L;C5<
* @since 2006-2-2 u_)'}
* @version 1.0 mVyF M -`
*/ p\|*ff0
public class SortUtil { 1`&"U[{
public final static int INSERT = 1; = :\o/)+
public final static int BUBBLE = 2; a/ Z\h{*
public final static int SELECTION = 3; oGZ%w4T
public final static int SHELL = 4; LT '2446
public final static int QUICK = 5; 2HREO@._)
public final static int IMPROVED_QUICK = 6; 7NfA)$
public final static int MERGE = 7; .{#J2}+[_}
public final static int IMPROVED_MERGE = 8; dxeLu
public final static int HEAP = 9; <bOi}
B}p{$g!
public static void sort(int[] data) { FAd4p9[Y
sort(data, IMPROVED_QUICK); w>gB&59r
} PeB7Q=d)K1
private static String[] name={ w ]$Hr
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 4] I7t
}; QPpC_pZh
w57D qG>
private static Sort[] impl=new Sort[]{ kC-OZVoO
new InsertSort(), =ET|h}I
new BubbleSort(), ^NiS7)FX
new SelectionSort(), gflu!C6
new ShellSort(), t5WW3$Nf
new QuickSort(), a{7'qmN1
new ImprovedQuickSort(), 4brKAqg.
new MergeSort(), <2{-ey]
new ImprovedMergeSort(), 0T7""^'&
new HeapSort() dBMr%6tz
}; .+ g8zbD4
DF!*S{)
public static String toString(int algorithm){ &C=[D_h
return name[algorithm-1]; uMe]].04
} u3ns-e
xRM)f93@
public static void sort(int[] data, int algorithm) { ;4ETqi9
impl[algorithm-1].sort(data); m_g2Cep
} =;?afUj
&`IC3O5
public static interface Sort { Pwg?a
public void sort(int[] data); Ryrvu1 k
} :N ~A7@
of k@.TmO
public static void swap(int[] data, int i, int j) { { vOr'j@
int temp = data; z->[:)c
data = data[j]; _)?59
data[j] = temp; HJeZm
} )tW0iFY
} zLda&#+