[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!;SL|lj.
} XYQ/^SI!:
int i1=l; wDw[RW3
int i2=mid+1; N[?N5~jG
for(int cur=l;cur<=r;cur++){ OwuE~K7b{
if(i1==mid+1) aasoW\UG
data[cur]=temp[i2++]; 5b5x!do
else if(i2>r) c7?_46J
data[cur]=temp[i1++]; -Mip,EO
else if(temp[i1] data[cur]=temp[i1++]; P=qa::A
else >3ZFzh&OYQ
data[cur]=temp[i2++]; f}6s Q5
} rDl*d`He!
} qjwxhabc
/{Is0+)
} ag;Q F
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改进后的归并排序: Y&`=jDI
W'els)WJ|x
package org.rut.util.algorithm.support; hC:n5]K
JR'
import org.rut.util.algorithm.SortUtil; vp1941P
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/** 8."]//V
* @author treeroot xP_cQwm`1
* @since 2006-2-2 a@8v^G
* @version 1.0 `Nv=B1
*/ [<7@{;r
public class ImprovedMergeSort implements SortUtil.Sort { %W'v}p
^9m\=5d
private static final int THRESHOLD = 10; $': E\*ICb
ycc4W*]
/* %) /s;Q,
* (non-Javadoc) t9nqu!);
* [v7F1@6b
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) wrviR
*/ DP[IZC
public void sort(int[] data) { s:?SF.
int[] temp=new int[data.length]; R$v[!A+:'
mergeSort(data,temp,0,data.length-1); XND|h#i8
} PvzcEV
fJ5iS
private void mergeSort(int[] data, int[] temp, int l, int r) { i3dkYevs?
int i, j, k; <qtr
int mid = (l + r) / 2; Wfu(*
if (l == r) Amp#GR1CA
return; y?rPlA_
if ((mid - l) >= THRESHOLD) e%@'5k\SK
mergeSort(data, temp, l, mid); 0\H\lKcK
else |<HPn4 ,X
insertSort(data, l, mid - l + 1); wYdb*"R
if ((r - mid) > THRESHOLD) QFE:tBHe
mergeSort(data, temp, mid + 1, r); kh!FR u h
else vhe>)h*B
insertSort(data, mid + 1, r - mid); 7z/|\D_{
w+C7BPV&
for (i = l; i <= mid; i++) { t\?ik6
temp = data; mGtdO/C#B
} FFl!\y*0z
for (j = 1; j <= r - mid; j++) { NYt&@Z}]
temp[r - j + 1] = data[j + mid]; s0\X ^
} ? 8)'oMD
int a = temp[l]; `V=N*hv`
int b = temp[r]; G"klu
for (i = l, j = r, k = l; k <= r; k++) { 6q*9[<8
if (a < b) { ;i8g41qjF
data[k] = temp[i++]; . kQkC:~9
a = temp; M*y)6H k~
} else { ^({})T0wu
data[k] = temp[j--]; %u?>#
b = temp[j]; 3e #p@sB
} =w;F<M|Y
} NYyh|X:m
} gRrL[z
|^0XYBxQ
/** T,7Y7c/3V
* @param data _7<FOOM%8y
* @param l J{'>uD.@
* @param i .nB0 h
*/ 83E7k]7]
private void insertSort(int[] data, int start, int len) { uya.sF0]9B
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); ;l4[%xld
} #G.ulX
} _|iSF2f,X
} KmMzH`t}`
} 1=t>HQ
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堆排序： ,kF1T,
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package org.rut.util.algorithm.support; rk&IlAE
N6>(;ugJ1-
import org.rut.util.algorithm.SortUtil; "*($cQ$v
)n+Lo&C<
/** +lm{Olm'^
* @author treeroot 4F)-"ck
* @since 2006-2-2 .)RzT9sg
* @version 1.0 Mc=$/ o
*/ OJ,`
public class HeapSort implements SortUtil.Sort{ uPhK3nCGo
t,,k
/* (non-Javadoc) YHkn2]^#A
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) !i{aMxUP
*/ OPwtV9%
public void sort(int[] data) { (^s>m,h
MaxHeap h=new MaxHeap(); O9vQp
h.init(data); 5pj22 s
for(int i=0;i h.remove(); E'G4Y-
System.arraycopy(h.queue,1,data,0,data.length); N8k00*p65
} 6 2'j!"xv
S)lkz'tdk
private static class MaxHeap{ #EO9UW5
A$<.a'&T!
void init(int[] data){ @AGn{q
this.queue=new int[data.length+1]; X59:C3c
for(int i=0;i queue[++size]=data; 0":ib0=
fixUp(size); T29Dt
} Xp >7iX!:
} u&`XB|~
>CrA;\l
private int size=0; <<@bl@9'
5Eg1Q YVt
private int[] queue; o4j[p3$
cimp/n"
public int get() { %{ABaeb]
return queue[1]; *194{ ep
} jNTjSX
/~}}"zx&
public void remove() { iEd\6EZ
SortUtil.swap(queue,1,size--); 1HXjN~XF
fixDown(1); DAS/43\
} p=;=w_^y
file://fixdown aIJt0;
private void fixDown(int k) { ~5_Ad\n9
int j; pv*,gSS
while ((j = k << 1) <= size) { 18~>ZR
if (j < size %26amp;%26amp; queue[j] j++; (}a8"]Z
if (queue[k]>queue[j]) file://不用交换 9bP^`\K[N
break; q-.,nMUF
SortUtil.swap(queue,j,k); gGr^@=;YC
k = j; |k+8<\
} ?,p;O
} +,2:g}5
private void fixUp(int k) { )T';qm0w
while (k > 1) { RMK"o?
int j = k >> 1; eb.O#Y
if (queue[j]>queue[k]) vk+VP 1D
break; |rJ=Ksc
SortUtil.swap(queue,j,k); t0o`-d(
k = j; =o Xsb
} Du`JaJI
} Q o?O:
6qRx0"qB
} `4(e
#,7e NM"
} d`P7}*;`
>ZPsjQuf"
SortUtil： PUF/#ck
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package org.rut.util.algorithm; afv~r>q(-
0ZBJ~W
import org.rut.util.algorithm.support.BubbleSort; M:-.o
import org.rut.util.algorithm.support.HeapSort; |zR8rqBX;
import org.rut.util.algorithm.support.ImprovedMergeSort; @W vatD V
import org.rut.util.algorithm.support.ImprovedQuickSort; >=RmGS
import org.rut.util.algorithm.support.InsertSort; gg[WlRQK4A
import org.rut.util.algorithm.support.MergeSort; p<zSJLN
import org.rut.util.algorithm.support.QuickSort; 1nQWW9i
import org.rut.util.algorithm.support.SelectionSort; \Kl+ 5%L
import org.rut.util.algorithm.support.ShellSort; %ZNI:Uh
z54EG:x.7^
/** 2@9Tfm(=
* @author treeroot ^.#jF#u~
* @since 2006-2-2 J/\V%~ 1F
* @version 1.0 JQ,1D`?.a
*/ nN*w~f"
public class SortUtil { {k>Ca
public final static int INSERT = 1; PE~G=1x3
public final static int BUBBLE = 2; p89wNSMl[
public final static int SELECTION = 3; m1),;RsH
public final static int SHELL = 4; $UgA0]qn
public final static int QUICK = 5; <%maDM^_\(
public final static int IMPROVED_QUICK = 6; 1abtgDL
public final static int MERGE = 7; fJ/e(t
public final static int IMPROVED_MERGE = 8; ~MS\
public final static int HEAP = 9; .#1~Rz1r
jqv-D
public static void sort(int[] data) { Tsgk/e9K2?
sort(data, IMPROVED_QUICK); b /@#}Gc
} ^~G8?]w
private static String[] name={ ^SxY IFL
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" MP_'D+LS
}; U4gF(Q
'@p['#\uI
private static Sort[] impl=new Sort[]{ v'VD0+3[H
new InsertSort(), &z>e5_.
new BubbleSort(), 6xWe=QGE
new SelectionSort(), ANJ$'3tg
new ShellSort(), :Qumb
new QuickSort(), >iD )eB
new ImprovedQuickSort(), pV20oSJNt
new MergeSort(), T'4z=Z]w
new ImprovedMergeSort(), zY,r9<I8_x
new HeapSort() ;k7xMZs
}; L1ieaKw
^zt-HDBR_
public static String toString(int algorithm){ {.QEc0-
return name[algorithm-1]; @$LWWTr;
} 5D_fXfx_|
Sg6"WV{<
public static void sort(int[] data, int algorithm) { V#cqRE3XNi
impl[algorithm-1].sort(data); x/;buW-
} ]T;EdK-
{) Q@c)'
public static interface Sort { JS*m65e
public void sort(int[] data); um4yF*3b9
} 4d8B`Fa9
t*>R`,j
public static void swap(int[] data, int i, int j) { enp)-nS0
int temp = data; } w 5l
data = data[j]; ?RK]FP"A
data[j] = temp; HRiL.DS
} H2um|6>
} 7Garnd b