[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; e%UFY-2
} I^lb;3uR
int i1=l; RJd55+h
int i2=mid+1; $vc:u6I[
for(int cur=l;cur<=r;cur++){ eb:uh!
if(i1==mid+1) 8G{} r
data[cur]=temp[i2++]; w/Q'T&>b/
else if(i2>r) L*L3;y|
data[cur]=temp[i1++]; r!#a.
else if(temp[i1] data[cur]=temp[i1++]; ~BZA_w"`1
else ]2Lwd@
data[cur]=temp[i2++]; ~Jq<FVK
} Iy`Zh@"~
} e'7!aysj
nP_s+k
} Y{2\==~
PW.W.<CL
改进后的归并排序: [g<6i.<I
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package org.rut.util.algorithm.support; o1kLT@VCl
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import org.rut.util.algorithm.SortUtil; 3:);vh!
=DF7l<&km
/** N5oao'7|A
* @author treeroot =u73AM}
* @since 2006-2-2 >F@7}Y(
* @version 1.0 Ym0Xl(Se
*/ 9Y*6AaKE6
public class ImprovedMergeSort implements SortUtil.Sort { i}M&1E
WFLT[j!1
private static final int THRESHOLD = 10; G?8,&jP~T
t5e%"}>7H
/* )zen"](cze
* (non-Javadoc) 5H?`a7q N
* xB 4A"|
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) O2A Z|[*I
*/ 1LcQ*d
public void sort(int[] data) { #CVD:p
int[] temp=new int[data.length]; Q{mls
mergeSort(data,temp,0,data.length-1); 3Jk;+<
} >#c]rk:
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private void mergeSort(int[] data, int[] temp, int l, int r) { 7uxy<#Ar
int i, j, k; {f)",#
int mid = (l + r) / 2; `<+D<x)(3
if (l == r) G4AX8@;U
return; 7c<2oTN'
if ((mid - l) >= THRESHOLD) ILTd*f
mergeSort(data, temp, l, mid); YceiP,!4?v
else >l'QX(
insertSort(data, l, mid - l + 1); r"J1C
if ((r - mid) > THRESHOLD) 8|V6RgA%
mergeSort(data, temp, mid + 1, r); +Bc/@.Q'
else !^G+@~U
insertSort(data, mid + 1, r - mid); S 8h/AW6l
fm:/}7s
for (i = l; i <= mid; i++) { 3vmLftZE}
temp = data; ~D<o}ItRF
} [-1Nn}
for (j = 1; j <= r - mid; j++) { [*8wv^
temp[r - j + 1] = data[j + mid]; ZXHG2@E)
} MdZ7Yep
int a = temp[l]; ;STO!^9~
int b = temp[r]; =4+UX*&i?.
for (i = l, j = r, k = l; k <= r; k++) { b 3D:w{l
if (a < b) { 7f[nNng
data[k] = temp[i++]; az0( 54M
a = temp; yBht4"\Al
} else { t3v*P6
data[k] = temp[j--]; NzNAhlXj3
b = temp[j]; LDr!d1A
} D@5&xd_@4
} ANn{*h
} `H^Nc\P#
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/** Af ^6
* @param data dg/7?gV
* @param l mkrvWZjZX
* @param i ~$!eB/6ty
*/ ZEUd?"gaR
private void insertSort(int[] data, int start, int len) { `k_5Pz\
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); !z58,hv
} mcS/-DaN?
} c{rX7+bN
} 8Tv;,a
} ldanM>5
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堆排序： uSM4:!8
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package org.rut.util.algorithm.support; y%}Po)X]f
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import org.rut.util.algorithm.SortUtil; o9q%=/@,
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/** X\X
* @author treeroot 8y~ Jn~t
* @since 2006-2-2 !+9H=u
* @version 1.0 4#;rv$ {
*/ @Eqc&v!O
public class HeapSort implements SortUtil.Sort{ n?!.r c
`k^ i#Nc>
/* (non-Javadoc) V*U"OJ%
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) NT= ?@uxD
*/ e%(zjCA
public void sort(int[] data) { $-M1<?5
MaxHeap h=new MaxHeap(); V:QfI
h.init(data); n_.2B$JD
for(int i=0;i h.remove(); DY~~pi~
System.arraycopy(h.queue,1,data,0,data.length); }@SZ!-t%rD
} V1xpJ
x #BUIi
private static class MaxHeap{ (@uQ>dR:
ItC*[
void init(int[] data){ iWGgt]RJ
this.queue=new int[data.length+1]; u?Iop/b
for(int i=0;i queue[++size]=data; (gl CTF9v
fixUp(size); .<rL2`C[c
} vb{&T<
} \dbpCZ
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private int size=0; A6q,"BS^d
#s(B,`?N
private int[] queue; Fl(+c0|kT
E)#3*Wlu$
public int get() { [^1;8Tbk
return queue[1]; }I;=IYrN
} @>(l}5U5
PrDvRWM
public void remove() { &p=|z2 J
SortUtil.swap(queue,1,size--); _GI [SzD
fixDown(1); HPVT$EJ
} - Kj$A@~x
file://fixdown XH1so1h
private void fixDown(int k) { Gv?3}8Wp
int j; k,X` }AJ6
while ((j = k << 1) <= size) { 1 (P>TH
if (j < size %26amp;%26amp; queue[j] j++; GB^Ch YOb
if (queue[k]>queue[j]) file://不用交换 9i,QCA
break; Ij@YOt
SortUtil.swap(queue,j,k); +%UXI$v
k = j; /D 2v1
} k{y@&QNj
} 5W 5\*L
private void fixUp(int k) { SZ1+h TY7d
while (k > 1) { lJR",_
int j = k >> 1; YUM%3
if (queue[j]>queue[k]) !_l W#feR
break; x8b w#
SortUtil.swap(queue,j,k); .~ZNlI {K
k = j; #E{OOcM
} kpxd+w
} }4A+J"M4y
PO<4rT+B
} S[X bb=n
W O|2x0K
} @"'1"$
jP@H$$-=wH
SortUtil： ,t*#o&+
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package org.rut.util.algorithm; 'WxcA)z0cQ
2+sNt6B2
import org.rut.util.algorithm.support.BubbleSort; uDQ d48>
import org.rut.util.algorithm.support.HeapSort; wEQV"I
import org.rut.util.algorithm.support.ImprovedMergeSort; 3~a!h3.f
import org.rut.util.algorithm.support.ImprovedQuickSort; sJw3o7@pg
import org.rut.util.algorithm.support.InsertSort; }yx'U 3
import org.rut.util.algorithm.support.MergeSort; k3}ymhUf
import org.rut.util.algorithm.support.QuickSort; xwTN\7f>
import org.rut.util.algorithm.support.SelectionSort; A4Q8^^byY
import org.rut.util.algorithm.support.ShellSort; `| L+a~~
o_bj@X
/** oizD:|
* @author treeroot psgXJe$
* @since 2006-2-2 0Evmq3,9
* @version 1.0 na(@`(j[
*/ T&w3IKb|}
public class SortUtil { ,DXNq`24
public final static int INSERT = 1; Rkw)IdB
public final static int BUBBLE = 2; ~ NKw}6
public final static int SELECTION = 3; -9.S?N'T>;
public final static int SHELL = 4; 8`U5/!6fu
public final static int QUICK = 5; &r/a\t,8n
public final static int IMPROVED_QUICK = 6; #-f7hg*
public final static int MERGE = 7; z )a8 ^]`
public final static int IMPROVED_MERGE = 8; )+u|qT3%
public final static int HEAP = 9; kJZBQ<^
%kKe"$)0
public static void sort(int[] data) { Y3mATw 3Wh
sort(data, IMPROVED_QUICK); m%qah>11
} CJ {?9z@$.
private static String[] name={ x6.an_W6
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" eH(8T
}; 2%rAf8=
z X2BJ
private static Sort[] impl=new Sort[]{ [3]!*Cd
new InsertSort(), \2L%%M
new BubbleSort(), g(;t,Vy,I
new SelectionSort(), x5c pv
new ShellSort(), HulN84
new QuickSort(), k8GcHqNHx
new ImprovedQuickSort(), S^c5
new MergeSort(), f:KKOLm
new ImprovedMergeSort(), _$9<N5F.,o
new HeapSort() =L#tSa=M"
}; cr27q6_
@Vr?)_0
public static String toString(int algorithm){ |GA4fFE=
return name[algorithm-1]; zX"@QB3E
} 38>8{Ma
]mn(lK
public static void sort(int[] data, int algorithm) { I'`Q_5s5
impl[algorithm-1].sort(data); G!ty@ Fx
} ;E,%\<
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public static interface Sort { sG%Q?&-
public void sort(int[] data); Qx>S>f
} V/.Y]dN5
#W @6@Mv
public static void swap(int[] data, int i, int j) { B;SYO>.W
int temp = data; >/.-N
data = data[j]; jI_TN5
data[j] = temp; JcvWE $
} $Dxz21|P7
} 2~<?E`+