[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; TOXZl3s5#
} fT
int i1=l; vDp|9VY?
int i2=mid+1; /dq(Z"O_
for(int cur=l;cur<=r;cur++){ Jyo(Etp
if(i1==mid+1) njg\y
data[cur]=temp[i2++]; rhA>;9\
else if(i2>r) "%]vSr
data[cur]=temp[i1++]; tA]Y=U+Q
else if(temp[i1] data[cur]=temp[i1++]; Q2nqA1sRk
else d+158qQOh]
data[cur]=temp[i2++]; +EE(d/f
} W+D{4:
} Nvj0MD{ X
rX@?~(^ML
} P1A5Qq
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改进后的归并排序: w^wh|'u^_@
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package org.rut.util.algorithm.support; Y!w {,\3
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import org.rut.util.algorithm.SortUtil; ;P!x/Ct
z{ MO~d9
/** yjj)+eJ(Q
* @author treeroot $|pD}
* @since 2006-2-2 ~e#QAaXD#5
* @version 1.0 Q]<6i
*/ "6zf-++%
public class ImprovedMergeSort implements SortUtil.Sort { \1mTKw)S
!J-oGs\ u
private static final int THRESHOLD = 10; ,%EGM+
h1jEulcMtq
/* '5 kSr(
* (non-Javadoc) -/3D0`R
* Yo;Mexo!
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) l~c# X3E
*/ pIP^/H
public void sort(int[] data) { N@G~+GCxL
int[] temp=new int[data.length]; &JHqUVs^
mergeSort(data,temp,0,data.length-1); ypV>*
} '7(oCab"_
$KMxq=
private void mergeSort(int[] data, int[] temp, int l, int r) { 6h3TU,$r
int i, j, k; fs;pX/:FR
int mid = (l + r) / 2; u RPvo}!=1
if (l == r) %% A==_b
return; *e}1KcJ
if ((mid - l) >= THRESHOLD) -G@:uxB
mergeSort(data, temp, l, mid); jpRC6b?
else 6qH^&O][
insertSort(data, l, mid - l + 1); d gRTV<vM
if ((r - mid) > THRESHOLD) o=ULo &9
mergeSort(data, temp, mid + 1, r); I!;vy/r
else YqNI:znm-
insertSort(data, mid + 1, r - mid); 5BsfbLKC
T f;:C]
for (i = l; i <= mid; i++) { _yP02a^2
temp = data; sTChbks
} +#MQ8d
for (j = 1; j <= r - mid; j++) { fZF.eRP'
temp[r - j + 1] = data[j + mid]; `(Ij@84
} G0&'B6I>
int a = temp[l]; Zq\Vq:MX
int b = temp[r]; Q3|I.I e
for (i = l, j = r, k = l; k <= r; k++) { z)0%gd|
if (a < b) { $mLiEsJ
data[k] = temp[i++]; v7@O ,%
a = temp; @1^:V-=
} else { IM$I=5ye
data[k] = temp[j--]; C3GI?|b
b = temp[j]; }j6<S-s~
} gi5Ffvs$
} ?Y|*EH
} gPzp/I
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/** $3D#U^7i
* @param data Bn?MlG;aA
* @param l AB")aX2%E
* @param i (3fU2{sm
*/ V^5Z9!
private void insertSort(int[] data, int start, int len) { w;(B4^?
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); kV:C=MLI
} f+W8Gszi
} 2z615?2_U
} #uillSV
} DY6ra% T
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堆排序： \(a!U,]LM
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package org.rut.util.algorithm.support; &j_:VP
#7yy7Y5
import org.rut.util.algorithm.SortUtil; AagWswv{Bf
("-`Y'"K
/** 9o|#R&0
* @author treeroot QQIU5
* @since 2006-2-2 :dkBr@u96O
* @version 1.0 k>mqKzT0$+
*/ ;OD+6@Sr
public class HeapSort implements SortUtil.Sort{ SF?s^
3&ES?MyB#
/* (non-Javadoc) ]`GDZw`
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) *, RxOz2=
*/ **L3T3$)
public void sort(int[] data) { Imm|5-qJ
MaxHeap h=new MaxHeap(); [[8.Xb
h.init(data); sksop4gu5
for(int i=0;i h.remove(); k<cv80lhK
System.arraycopy(h.queue,1,data,0,data.length); aB+B1YdY"
} Z4aK
<rAk"R^
private static class MaxHeap{ jFThW N
iz pFl@WS
void init(int[] data){ j~:N8(=
this.queue=new int[data.length+1]; lM'yj}:~
for(int i=0;i queue[++size]=data; PquATAzQA
fixUp(size); @E5}v
} 1ps_zn(
} h<ULp&g
WA&&*ae5`
private int size=0; b1NB:
5xF R7%_&
private int[] queue; sM8AORd
vhaUV#V"
public int get() { baL-~`(T
return queue[1]; e+=IGYC
} "=r"c$xou
-yn;Jo2-
public void remove() { Up|>)WFw"
SortUtil.swap(queue,1,size--); *S$`/X
fixDown(1); ;UB$Uqs6
} ,H+LE$=
file://fixdown &}/h[v_#'
private void fixDown(int k) { 7gY^aMW
int j; d[Lr`=L;
while ((j = k << 1) <= size) { ,)JSXo
if (j < size %26amp;%26amp; queue[j] j++; 2r~&+0sBP
if (queue[k]>queue[j]) file://不用交换 =-GHs$u%f
break; *zR
SortUtil.swap(queue,j,k); `*hrU{b
k = j; baVSQtda
} J)xc mK
} U&<Nhh
private void fixUp(int k) { 61^5QHur
while (k > 1) { "TgE@bC
int j = k >> 1; 6}EC)j;Fw
if (queue[j]>queue[k]) >HH49cCo
break; 4;hgi[
SortUtil.swap(queue,j,k); sXaIQhZ
k = j; %: .{?FB_
} Oor&1
} =z$XqT.'
Qy+&N*k>
} >IzUn: 0F
td6$w:SN,l
} @xI:ZtM
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SortUtil： -n`igC
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package org.rut.util.algorithm; g@jAIy]
L9=D,C~
import org.rut.util.algorithm.support.BubbleSort; /\_wDi+#
import org.rut.util.algorithm.support.HeapSort; *NDM{WB|)
import org.rut.util.algorithm.support.ImprovedMergeSort; $MT'ZM
import org.rut.util.algorithm.support.ImprovedQuickSort; CNiUHUD
import org.rut.util.algorithm.support.InsertSort; xXktMlI
import org.rut.util.algorithm.support.MergeSort; +s'qcC
import org.rut.util.algorithm.support.QuickSort; QQwD)WG
import org.rut.util.algorithm.support.SelectionSort; 01nbR+e
import org.rut.util.algorithm.support.ShellSort; "7k 82dw
~e!b81
/** u0(PWCi2
* @author treeroot d* 6 lJT
* @since 2006-2-2 lbtVQW0V;o
* @version 1.0 oe:@7stG
*/ @!:~gQ
public class SortUtil { l`vb
public final static int INSERT = 1; De(\<H#
public final static int BUBBLE = 2; Hi 1@
public final static int SELECTION = 3; E\(dyq/
public final static int SHELL = 4; _IOt(Zb(
public final static int QUICK = 5; lc71Pp>
public final static int IMPROVED_QUICK = 6; v3i]z9`
public final static int MERGE = 7; Q6G-`&5
public final static int IMPROVED_MERGE = 8; 2h6<'2'o1
public final static int HEAP = 9; @L-3&~=
O,kzU,zOs
public static void sort(int[] data) { ho7L@NR
sort(data, IMPROVED_QUICK); {i7Wp$ug
} hK,e<?N^
private static String[] name={ m"<Sb,"x!
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" ORV~F0d<
}; SJtQK-%wK>
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private static Sort[] impl=new Sort[]{ 0 7CufoI
new InsertSort(), |-HV@c]
new BubbleSort(), ]mN'Qoc
new SelectionSort(), fq.ui3lP)
new ShellSort(), ]i-peBxw
new QuickSort(), `;ofQz4
new ImprovedQuickSort(), p. eq N
new MergeSort(), Y?(kE` R
new ImprovedMergeSort(), K{}U[@_tS
new HeapSort() hy"O_Le
}; ERO'{nT&
swBgV,;
public static String toString(int algorithm){ :3s5{s
return name[algorithm-1]; cViEvS r
} Vs-])Q?7J
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public static void sort(int[] data, int algorithm) { *Op;].>E
impl[algorithm-1].sort(data); G/nSF:rp
} nVF?.c
RnN]m!"5
public static interface Sort { JM-spi o
public void sort(int[] data); cY|?iEVs)
} pcd*K)
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public static void swap(int[] data, int i, int j) { ,&$+{3
int temp = data; WB2An7i@"{
data = data[j]; IcM99'P(
data[j] = temp; L7*,v5
} )Jx+R;Z
} )T1U!n?^x