[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; ?9,YVylg
} 'iGMn_&
int i1=l; W=M< c@
int i2=mid+1; >]C<j4
for(int cur=l;cur<=r;cur++){ FcY$k%;'Q
if(i1==mid+1) ;]"n?uo
data[cur]=temp[i2++]; n<+~ zQ
else if(i2>r) 'bG1U`v=3
data[cur]=temp[i1++]; (T4k~T`3
else if(temp[i1] data[cur]=temp[i1++]; UT% #K%
else UzN8G$92qF
data[cur]=temp[i2++]; B\NcCp`5
} @!,D%]8"
} (c 1u{
:Z]/Q/$
} QM7[O]@
@ > cdHv
改进后的归并排序: H2s*s[T -
$kM'
package org.rut.util.algorithm.support; s%hU*^ 8
X #H:&*[!
import org.rut.util.algorithm.SortUtil; c-v*4b/d
5=Zp%[#
/** L>i<dD{
* @author treeroot 0>8ZN!@K
* @since 2006-2-2 :R{x]sv
* @version 1.0 % d4+Ctrp-
*/ $;Q=iv3
public class ImprovedMergeSort implements SortUtil.Sort { %L{
7BVXBw
private static final int THRESHOLD = 10; aKaR
1+VY><=n
/* ]gjr+GV
* (non-Javadoc) .$n$%|"H-
* w 5!ndu
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) aViJ
*/ 4|I7:~
public void sort(int[] data) { <e$5~Spc
int[] temp=new int[data.length]; ^7J~W'hI
mergeSort(data,temp,0,data.length-1); xNocGtS
} 5+J64_
#IH<HL)t%e
private void mergeSort(int[] data, int[] temp, int l, int r) { ~r{\WZ.
int i, j, k; J~M H_N
int mid = (l + r) / 2; G*8+h
if (l == r) cA2^5'$$
return; s0_-1VU
if ((mid - l) >= THRESHOLD) wE-Ji<1HJ
mergeSort(data, temp, l, mid); O-y6!u$6&
else ?r^ hmu"a
insertSort(data, l, mid - l + 1); hg$qbeUl
if ((r - mid) > THRESHOLD) ecM4]U
mergeSort(data, temp, mid + 1, r); "``W6W-(
else "u .)X3
insertSort(data, mid + 1, r - mid); !hwzKm=%N
byEvc[/>Ys
for (i = l; i <= mid; i++) { Aqx3!
temp = data; Dlqn~
} tjBh$)
for (j = 1; j <= r - mid; j++) { |iLx$P6
temp[r - j + 1] = data[j + mid]; muK'h`
} Ec7{BhH)
int a = temp[l]; !V$6+?2
int b = temp[r]; "#_)G7W+e
for (i = l, j = r, k = l; k <= r; k++) { jh<TdvF2$
if (a < b) { qAS70XjOF
data[k] = temp[i++]; &/J.0d-*``
a = temp; xl1L4R)6D
} else { .E?bH V
data[k] = temp[j--]; chvrHvByS
b = temp[j]; 4*@G&v?n
} z v L>(R
} 12%z3/i
} h(+m<J
jsZiARTZRl
/** /Bg6z m
* @param data l(3'Re
* @param l se^NQ=
* @param i v^y}lT
*/ XvfcPI6
private void insertSort(int[] data, int start, int len) { +cV5h
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); sw3:HNG=
} k;"R y8[k
} /8P4%[\
} >o0&:h|>$'
} !0>!tW
}mtC6G41Q
堆排序： e]dPF[?7
twYB=68
package org.rut.util.algorithm.support; o=QRgdPD
^rxfNcU7
import org.rut.util.algorithm.SortUtil; mMD$X[:
<wd4^Vr!2
/** m2-fi*Mgg
* @author treeroot K4h-4Qbn
* @since 2006-2-2 SG(%d^x`R
* @version 1.0 Qwp\)jVi
*/ -@gJqoo>
public class HeapSort implements SortUtil.Sort{ 1`2);b{@
Tb!B!m
/* (non-Javadoc) *783xEF>f
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) O&rD4#
*/ {|7OmslC@
public void sort(int[] data) { 0~@L%~
MaxHeap h=new MaxHeap(); " kE:T.,
h.init(data); 36x5q 1
for(int i=0;i h.remove(); .dg 4gr\D
System.arraycopy(h.queue,1,data,0,data.length); xy-$v
} #G[ *2h~99
s&_IWala
private static class MaxHeap{ +[ZMrTW!0C
N>cp>&jV
void init(int[] data){ oneSgJ
this.queue=new int[data.length+1]; I;Z`!u:+
for(int i=0;i queue[++size]=data; >~^mIu_BH
fixUp(size); 2heWE
} _Gs
} c*M)DO`y;h
N$ qNe'b
private int size=0; T ?<'=
w>9H"Q[
private int[] queue; Hd=D#u=A4{
@2%VU#!m
public int get() { :Z*02JwK
return queue[1]; Lv,ji_
} H(5ui`'s
n8;G,[GM80
public void remove() { 6>LQGO
SortUtil.swap(queue,1,size--); 1S)0 23N
fixDown(1); &Gy'AUz-
} kERaY9L\
file://fixdown n{qw]/
private void fixDown(int k) { 9`gGsC
int j; !7,K9/"
while ((j = k << 1) <= size) { $Kw"5cm
if (j < size %26amp;%26amp; queue[j] j++; %DND&0`
if (queue[k]>queue[j]) file://不用交换 2'O!~8U
break; yaYIgG
SortUtil.swap(queue,j,k); J7 *G/F
k = j; UtGd/\:
} x#}j3" PP
} 2U+z~
private void fixUp(int k) { :+gCO!9Y
while (k > 1) { q*<J$PI
int j = k >> 1; MSYLkQ}_b
if (queue[j]>queue[k]) eqUn8<<s
break; 0-&sJ
SortUtil.swap(queue,j,k); *"wD&E?
k = j; f-f\}G&G
} #(7RX}
} ]Xkc0E1
iK6<^,]'
} z}b U\3!
zOdasEd8!
} 5f^`4pT
fB @pwmu
SortUtil： 1!v >I"]
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package org.rut.util.algorithm; "|l oSf@
).O2_<&?F
import org.rut.util.algorithm.support.BubbleSort; wJ]$'c3
import org.rut.util.algorithm.support.HeapSort; %.atWX`b
import org.rut.util.algorithm.support.ImprovedMergeSort; D!D%.
import org.rut.util.algorithm.support.ImprovedQuickSort; i$LV44
import org.rut.util.algorithm.support.InsertSort; [(e`b
import org.rut.util.algorithm.support.MergeSort; Jk6/i;4|
import org.rut.util.algorithm.support.QuickSort; dn.c#,Y
import org.rut.util.algorithm.support.SelectionSort; ~]_jKe4W
import org.rut.util.algorithm.support.ShellSort; ReGO9}
K~hlwjrt
/** |)P;%Fy9
* @author treeroot CsST-qxg
* @since 2006-2-2 /+JP~K
* @version 1.0 [9W&1zY
*/ abk:_
public class SortUtil { WG[0$j
public final static int INSERT = 1; C>K"ZJ
public final static int BUBBLE = 2; $Ln2O#
public final static int SELECTION = 3; j"$b%|
public final static int SHELL = 4; ?[>BssW
public final static int QUICK = 5; :#!F 7u
public final static int IMPROVED_QUICK = 6; $gD(MKR)~
public final static int MERGE = 7; Dil4ut-$
public final static int IMPROVED_MERGE = 8; HjF'~n
public final static int HEAP = 9; NYV0<z@M2M
GL0':LsZ
public static void sort(int[] data) { { G>+.
sort(data, IMPROVED_QUICK); },QFyT
} iNrmhiql
private static String[] name={ }-]s#^'w
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" TXk"[>,:H
}; UNH}*]u4`
Y8CYkJTAD-
private static Sort[] impl=new Sort[]{ z )}wo3
new InsertSort(), 8'_ ]gfF
new BubbleSort(), VTX'f2\
new SelectionSort(), ,vY I O
new ShellSort(), u #QSa$P
new QuickSort(), ah@GSu;7
new ImprovedQuickSort(), b8-^wJH!
new MergeSort(), @Oc}\Rg
new ImprovedMergeSort(), 6I.+c
new HeapSort() GH)+yD[o
}; %KVRiX
5>k~yaju/
public static String toString(int algorithm){ +z/73s0~
return name[algorithm-1]; rN!9&
} UtW3KvJ#=
+wgUs*(W
public static void sort(int[] data, int algorithm) { 1~iBzPU2
impl[algorithm-1].sort(data); /SM#hwFxJ&
} &7y1KwfXn
WRyv >Y
public static interface Sort { `fE:5y
public void sort(int[] data); cngPc]?N
} K>p:?w
Uc;IPS
public static void swap(int[] data, int i, int j) { |P?B AWYeQ
int temp = data; Tf]VcEF
data = data[j]; I)4|?tb?
data[j] = temp; z&G3&?Z
} v?'k)B
} |8?{JKsg