[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; 9Bw#VQ
} (CRx'R
int i1=l; Bm,Vu 1]t
int i2=mid+1; $OdBuJA
for(int cur=l;cur<=r;cur++){ 'tw ]jMD
if(i1==mid+1) wggB^ }~
data[cur]=temp[i2++]; 6pSTw\/6
else if(i2>r) 49M1^nMvoo
data[cur]=temp[i1++]; nIr`T^c9c
else if(temp[i1] data[cur]=temp[i1++]; eUZk|be
else #) :.1Z?
data[cur]=temp[i2++]; %cg| KB"l
} .{c7 I!8
} =]-z?O6^`
ye=4<b_
} A-:k4] {%P
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改进后的归并排序: HV)aVkr/&
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package org.rut.util.algorithm.support; pZlsDM/=
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import org.rut.util.algorithm.SortUtil; O=V_7I5
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/** x55W"q7
* @author treeroot ?RS:I%bL
* @since 2006-2-2 te2vv]W1
* @version 1.0 KcpYHWCa.
*/ \u{4=-C.
public class ImprovedMergeSort implements SortUtil.Sort { u>.a;BO
G 3,v'D5
private static final int THRESHOLD = 10; @L~erg>8=
]"HaE-`%
/* !CX WoM
* (non-Javadoc) *!$Z5Im
* +pme]V|<
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) G\BZ^SwE
*/ QEf@wv;T
public void sort(int[] data) { -*4*hHmb
int[] temp=new int[data.length]; 3.?be.cq
mergeSort(data,temp,0,data.length-1); ?R#$ c]
} nOL.%
KzO"$+M
private void mergeSort(int[] data, int[] temp, int l, int r) { Uzzm2OS`
int i, j, k; s$>n U
int mid = (l + r) / 2; <^Vj1s
if (l == r) YIg43Av
return; }R#W<4:
if ((mid - l) >= THRESHOLD) Ve|:k5z
mergeSort(data, temp, l, mid); 9/29>K_
else PjEJC@n
insertSort(data, l, mid - l + 1); 1J"9Y81
if ((r - mid) > THRESHOLD) g assOd
mergeSort(data, temp, mid + 1, r); b{ xlW }S
else s+lBai*#
insertSort(data, mid + 1, r - mid); g?v(>#i
>":xnX#
for (i = l; i <= mid; i++) { X2Z)> 10
temp = data; CUI+@|]%
} NT*r7_e
for (j = 1; j <= r - mid; j++) { |K Rt$t
temp[r - j + 1] = data[j + mid]; T2<%[AF0
} iO5g30l
int a = temp[l]; aim\3y~
int b = temp[r]; 8]&:'
for (i = l, j = r, k = l; k <= r; k++) { T8z?_ *k
if (a < b) { }Cu[x'J
data[k] = temp[i++]; WM ?a1j
a = temp; Pn OWQ8=
} else { `L`+`B
data[k] = temp[j--]; &;d N:F;
b = temp[j]; gx9Os2Z|3
} :}v-+eIQ
} ;C$+8%P4
} i>YQ<A1
K#wA ;
/** }psRgF
* @param data e9KD mX_
* @param l YP_L~zZ
* @param i X%5eZ"1{x
*/ H/*ol^X7
private void insertSort(int[] data, int start, int len) { )/::i O&$:
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); - /\qGI
} ;z4F-SYQ
} "g^i%
} zk8)!Af
} {s0%XG1$
Y\-xX:n.\
堆排序： UrvUt$WO
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package org.rut.util.algorithm.support; Z{0BH{23
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import org.rut.util.algorithm.SortUtil; 8-nf4=ll
,O5X80'.g
/** yKV{V?h?
* @author treeroot '/.Dxib
* @since 2006-2-2 V+ ("kz*
* @version 1.0 !g]5y=
*/ TR0y4u[
public class HeapSort implements SortUtil.Sort{ 8J(j}</>a
>5~#BrpwG
/* (non-Javadoc) nL:&G'd
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) `]eJF|"
*/ LOx+?4|y
public void sort(int[] data) { f"5O'QHGQK
MaxHeap h=new MaxHeap(); LN5LT'CE
h.init(data); DYr#?} 40
for(int i=0;i h.remove(); 4@?0wV
System.arraycopy(h.queue,1,data,0,data.length); Ocx"s\q(
} j1K3|E
w'H'o!*/
private static class MaxHeap{ l:V R8g[
F(HfXY3
void init(int[] data){ >s{I@#9
this.queue=new int[data.length+1]; }%jF!d
for(int i=0;i queue[++size]=data; R#d~a;j
fixUp(size); Zok{ndO@|f
} /YvXyi>^"%
} Z;.-UXat
]5Uuz?:e
private int size=0; BkB>eE1)Ea
\#9LwC"8;
private int[] queue; MuY:(zC%
>q:%?mi
public int get() { b0$)G-E/Y
return queue[1]; FbE/x$;~O
} u-TT;k'
JnBUW"
public void remove() { SN{+ Pk
SortUtil.swap(queue,1,size--); iNA3Y
fixDown(1); +NPL.b|
} V*4Z.3/E5
file://fixdown K|7"YNohfG
private void fixDown(int k) { 15g!Q *v
int j; ,&t+D-s<f
while ((j = k << 1) <= size) { O^@8Drgc
if (j < size %26amp;%26amp; queue[j] j++; x4'@U<
if (queue[k]>queue[j]) file://不用交换 7s|'NTp
break; I@'[>t
SortUtil.swap(queue,j,k); lYx_8x2
k = j; Zo3!Hs ZA
} ;l@94)@0
} uks75W!}U
private void fixUp(int k) { h:%,>I%{
while (k > 1) { d/7fJ8y8
int j = k >> 1; MgJ6{xzz
if (queue[j]>queue[k]) J6Z[c*W
break; 2Xt4Rqk$
SortUtil.swap(queue,j,k); u;`]U$Qq9
k = j; OpUfK4U)
} bWswF<y-
} )/;KxaKt
p/h\QG1
} Y [`+7w
?*fa5=ql
} Ww]$zd-bo
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SortUtil： vhrf89-q
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package org.rut.util.algorithm; uk):z$x
HbKE;N
import org.rut.util.algorithm.support.BubbleSort; +MoUh'/u
import org.rut.util.algorithm.support.HeapSort; hhTtxC<:
import org.rut.util.algorithm.support.ImprovedMergeSort; E=sh^Q(A
import org.rut.util.algorithm.support.ImprovedQuickSort; TjW!-s?S
import org.rut.util.algorithm.support.InsertSort; `fBQ?[05.
import org.rut.util.algorithm.support.MergeSort; 5PeS/%uT@
import org.rut.util.algorithm.support.QuickSort; ;,4*uU'vq
import org.rut.util.algorithm.support.SelectionSort; \QvGkcDc{
import org.rut.util.algorithm.support.ShellSort; G]K1X"W?
#I/P9)4
/** Qa{5]+E
* @author treeroot VdHT3r
* @since 2006-2-2 FOTe,F.8
* @version 1.0 C(N'=-;Kl
*/ %rW}x[M%w?
public class SortUtil { my'nDi
public final static int INSERT = 1; "<CM'R
public final static int BUBBLE = 2; }.&nEi`
public final static int SELECTION = 3; clE9I<1v
public final static int SHELL = 4; VeA@HC`?"
public final static int QUICK = 5; ^)AECn
public final static int IMPROVED_QUICK = 6; V*p[6{U0
public final static int MERGE = 7; n ay\)
public final static int IMPROVED_MERGE = 8; HsCL%$k
public final static int HEAP = 9; voa)V1A/]
O=0p}{3l
public static void sort(int[] data) { 5GsmBf$RUb
sort(data, IMPROVED_QUICK); TDh)}Ms
} +IdM|4$\1
private static String[] name={ q)q3p
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" r&u1-%%9[
}; F @PPhzZ
iQG!-.aX
private static Sort[] impl=new Sort[]{ tr0b#4
new InsertSort(), x@-K
new BubbleSort(), 5aQ)qUgAW
new SelectionSort(), Ua1&eCZi
new ShellSort(), 'P.y?
new QuickSort(), S<mZs;
new ImprovedQuickSort(), ,1-%C)
new MergeSort(), Y+-yIMt$r
new ImprovedMergeSort(), o|xf2k
new HeapSort() 2I.FSR_G?
}; y1V}c,
PR{ubMn
public static String toString(int algorithm){ NFT:$>83`
return name[algorithm-1]; )UR$VL
} VUP|j/qD
mb\T)rj
public static void sort(int[] data, int algorithm) { Rk$7jZdTf
impl[algorithm-1].sort(data); |~9rak,
} M Kyj<@[
\8{SQ%
public static interface Sort { t[|oSF#i
public void sort(int[] data); NLsF6BX/-
} wT@Z|.)
iq;\},
public static void swap(int[] data, int i, int j) { 579Q&|L.
int temp = data; e,(Vy
data = data[j]; a*M|_&MH*
data[j] = temp; 5wK==hZ
} 7K"3[.
} zteu{0