[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; [}9XHhY1O=
} +2;#9aa I
int i1=l; YmO"EWb
int i2=mid+1; 7U{b+=,wK
for(int cur=l;cur<=r;cur++){ )F%wwc^r
if(i1==mid+1) g9([3pV,
data[cur]=temp[i2++]; sl^s9kx;C$
else if(i2>r) %|D\j-~
data[cur]=temp[i1++]; ;G4HMtL
else if(temp[i1] data[cur]=temp[i1++]; hdsgOu
else 8zCGMhd
data[cur]=temp[i2++]; yNLa3mW
} X>6~{3
} U<gUX07
-_{C+Y_
} l$p_])x
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改进后的归并排序: VeN&rjc
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package org.rut.util.algorithm.support; _M"$5 T
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import org.rut.util.algorithm.SortUtil; ZHiICh|et%
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/** +/@ZnE9s
* @author treeroot `jUS{ 3^
* @since 2006-2-2 B(en5|
* @version 1.0 R@7GCj
*/ JR a*;_
public class ImprovedMergeSort implements SortUtil.Sort { (}~eD
wCq)w=,
private static final int THRESHOLD = 10; w371.84
*xv/b=
/* XC$+ `?
* (non-Javadoc) Y&05 *b"
* e&H<lT
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) G7/?hky 0.
*/ "#\bQf}
public void sort(int[] data) { +}(B856+
int[] temp=new int[data.length]; $^NWzc
mergeSort(data,temp,0,data.length-1); WfTdD.Xx
} 2=Y_Qrhi
*(\;}JF-
private void mergeSort(int[] data, int[] temp, int l, int r) { $Va]vC8?
int i, j, k; }lNufu
int mid = (l + r) / 2; Zm; +Ku>
if (l == r) <SC|A|
return; ~kj(s>xP
if ((mid - l) >= THRESHOLD) #o r7T^
mergeSort(data, temp, l, mid); ]:E! i^C`Z
else {Jw<<<G
insertSort(data, l, mid - l + 1); o$blPTN
if ((r - mid) > THRESHOLD) ,I2reG
mergeSort(data, temp, mid + 1, r); jC/JiI
else (;2J(GZ:$U
insertSort(data, mid + 1, r - mid); {ck
%B {D
for (i = l; i <= mid; i++) { L yA(.
temp = data; e\ l,gQP
} S)'q:`tZo
for (j = 1; j <= r - mid; j++) { O 44IH`SI
temp[r - j + 1] = data[j + mid]; e}Af"LI
} vZ nO
int a = temp[l]; H8t{ >C)]
int b = temp[r]; <E}]t,'3
for (i = l, j = r, k = l; k <= r; k++) { Q5Ghki
if (a < b) { "PX3%II
data[k] = temp[i++]; XM@-Y&c$A
a = temp; .f92^lu9
} else { }_kI>
data[k] = temp[j--]; 5k%N<e``
b = temp[j]; y8~)/)l&
} 6rN5Xf cS
} }'.Sn{OWf
} ^cmP
^$Eiz.
/** =iK6/ y`
* @param data GaK_9Eg-2
* @param l E]eqvTNH
* @param i %*Z2Gef?H
*/ !DX/^b
private void insertSort(int[] data, int start, int len) { v/TlXxfil
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); ik:)-GV;s
} 3~3(G[w
} dI0>m:RBz
} Znl>*e/|
} q=0{E0@9({
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堆排序： SiuO99'nV
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package org.rut.util.algorithm.support; 7si*%><X
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import org.rut.util.algorithm.SortUtil; C"` 'Re5)
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/** v!RB(T3
* @author treeroot zju,#%
* @since 2006-2-2 "MS`d+rf\
* @version 1.0 O->(9k<
*/ 'ZZWH
public class HeapSort implements SortUtil.Sort{ vkd<l&zD
RAuAIiQ
/* (non-Javadoc) d7K17KiC
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) !q6V@&
*/ yE|} r
public void sort(int[] data) { z.9FDQLp
MaxHeap h=new MaxHeap(); Oi%~8J>
h.init(data); > %cWTC
for(int i=0;i h.remove(); 9@z|2z2\G
System.arraycopy(h.queue,1,data,0,data.length); $?AUk
} dZiWVa
u*-<5&X
private static class MaxHeap{ 2hA66ar{$
/2\=sTd
void init(int[] data){ `J,~hK
this.queue=new int[data.length+1]; /'=^^%&:B
for(int i=0;i queue[++size]=data; l0_E9qh-i
fixUp(size); [U7,\o4w
} OTHd1PSOu
} ^xNe Eb
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private int size=0; ,N|R/Vk$+E
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private int[] queue; JHh9> .1
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public int get() { >Hzb0N!VJ
return queue[1]; E29gnYxu8
} H[!Q
f, j(uP
public void remove() { u-M$45vct
SortUtil.swap(queue,1,size--); )E~\H+FP6
fixDown(1); ;3?J#e6;
} "JLhOTPaHf
file://fixdown |VR5Q(d
private void fixDown(int k) { E?h2e~ ,]
int j; GGQ(|?w
while ((j = k << 1) <= size) { =^AZx)Kwd
if (j < size %26amp;%26amp; queue[j] j++; +?txGHQq
if (queue[k]>queue[j]) file://不用交换 C\>Mt
break; 3k[<4-
SortUtil.swap(queue,j,k); (Rg!km%2T
k = j; [ma#8p)
} ,<j5i?
} I;.E}k
private void fixUp(int k) { )qP{X,Uf
while (k > 1) { :!YJ3:\
int j = k >> 1; I)%jPH:ua
if (queue[j]>queue[k]) (5DGs_>
break; Vh9s.=*P@
SortUtil.swap(queue,j,k); #~-&&S4a.J
k = j; CJtjn
} `1}?{ud
} Qufv@.'AY
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} -j=&J8Za
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} BRzWZq%r3
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SortUtil： rxI&;F#
:w_1J'D}
package org.rut.util.algorithm; (?3\.tQ}}
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import org.rut.util.algorithm.support.BubbleSort; svRaU7<UDN
import org.rut.util.algorithm.support.HeapSort; } 9s
import org.rut.util.algorithm.support.ImprovedMergeSort; glX2L~
import org.rut.util.algorithm.support.ImprovedQuickSort; ;Y&?ixx
import org.rut.util.algorithm.support.InsertSort; XaS_3d
import org.rut.util.algorithm.support.MergeSort; ^PR,TR.
import org.rut.util.algorithm.support.QuickSort; @ZPTf>J}
import org.rut.util.algorithm.support.SelectionSort; \HEo8~TY
import org.rut.util.algorithm.support.ShellSort; ^(JbJ@m/
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/** jz7ltoP
* @author treeroot <Jrb"H[T"
* @since 2006-2-2 u#,'ys
* @version 1.0 w:xKgng=L
*/ 4S EC4yO
public class SortUtil { GaqG8%.
public final static int INSERT = 1; n)!_HNc9
public final static int BUBBLE = 2; mXM>6>;y
public final static int SELECTION = 3; >MY.Fr#.m
public final static int SHELL = 4; 17]31
public final static int QUICK = 5; i/Lq2n3 )
public final static int IMPROVED_QUICK = 6; EAXU{dRV
public final static int MERGE = 7; 9v,8OK)
public final static int IMPROVED_MERGE = 8; 5@A=, GPUn
public final static int HEAP = 9; Q~!hr0 ZR
`e=n(D
public static void sort(int[] data) { `'.x*MNF
sort(data, IMPROVED_QUICK); gH55caF<
} TZyQOjUu
private static String[] name={ XJ/kB8
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" rw0lXs#K<E
}; aDv/kFfn
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private static Sort[] impl=new Sort[]{ nGgc~E$j
new InsertSort(), A1}+j-D7!y
new BubbleSort(), .FRF<_`^
new SelectionSort(), Vzm+Ew _
new ShellSort(), h`rjDd
new QuickSort(), W&f Py%g
new ImprovedQuickSort(), R:^?6f<Z}
new MergeSort(), +p<R'/
new ImprovedMergeSort(), VCRv(Ek
new HeapSort() tsVhPo]e0
}; cB=u;$k@*
3CPOZZ
public static String toString(int algorithm){ @W- f{V
return name[algorithm-1]; /l%qq*Ew
} % peb{i
Z9~Wlt'?
public static void sort(int[] data, int algorithm) { [F{a-i-
impl[algorithm-1].sort(data); z9O/MHT[w
} |Z|xM
8%f! X51
public static interface Sort { U(LR('-h
public void sort(int[] data); |L{dQ)-'l
} =e{KtX.
L([>yQZ
public static void swap(int[] data, int i, int j) { =,G(1#
int temp = data; ;-^9j)31+F
data = data[j]; >F_Ne)}qTQ
data[j] = temp; %GiO1:t
} ua-|4@YO
} Ayt!a+J