[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; tRNMiU
} TgKSE1
int i1=l; Zh_3ydMD1
int i2=mid+1; 5ka6=R(r
for(int cur=l;cur<=r;cur++){ /x\~5cC
if(i1==mid+1) V5gr-^E
data[cur]=temp[i2++]; V`G^Jyj
else if(i2>r) '=J|IN7WT
data[cur]=temp[i1++]; P1|3%#c
else if(temp[i1] data[cur]=temp[i1++]; 7/iN`3Bz
else Yy,XKIqU
data[cur]=temp[i2++]; Bq,MTzxD
} "*:?m{w5
} h<qi[d4X
kV4L4yE
} +}eK8>2
c=aZ[
改进后的归并排序: E&)o.l<h|
m ;wj|@cF
package org.rut.util.algorithm.support; V{X/yN.u
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import org.rut.util.algorithm.SortUtil; l< HnPR/
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/** =&~ K;=:
* @author treeroot n*caP9B
* @since 2006-2-2 \Qq YH^M
* @version 1.0 X]dN1/_
*/ EAE#AB-A
public class ImprovedMergeSort implements SortUtil.Sort { w=^~M[%w
)(pgJLW
private static final int THRESHOLD = 10; )k]{FM
]ZH6 .@|
/* =L`PP>"rW
* (non-Javadoc) 5UX-Qqr
* Tq?f5swsI
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) W{1l?Wo
*/ 7| `_5e
public void sort(int[] data) { -![{Zb@
int[] temp=new int[data.length]; V0n8fez b
mergeSort(data,temp,0,data.length-1); #TcX5
} yZb})4.
n^nQrRIp
private void mergeSort(int[] data, int[] temp, int l, int r) { (%G>TV
int i, j, k; _qH]OSo
int mid = (l + r) / 2; B_C."{G
if (l == r) 0^6}s1d_
return; C#P>3"
if ((mid - l) >= THRESHOLD) bAUYJPRpy
mergeSort(data, temp, l, mid); ,^jQBD4={
else ,V''?@
insertSort(data, l, mid - l + 1); E!`/XB/nA
if ((r - mid) > THRESHOLD) -VP_Aw$
mergeSort(data, temp, mid + 1, r); %VE FruM
else <3Rq!w/
insertSort(data, mid + 1, r - mid); q(BRJ(
;Mr Q1
for (i = l; i <= mid; i++) { \"$q=%vD
temp = data; 3h6,x0AG
} Equ%6x
for (j = 1; j <= r - mid; j++) { aM:tg1g
temp[r - j + 1] = data[j + mid]; e}s,WC2-
} M&e=LV
int a = temp[l]; 21] K7
int b = temp[r]; g_eR&kuh
for (i = l, j = r, k = l; k <= r; k++) { ?OGs+G
if (a < b) { IvI;Q0E-3
data[k] = temp[i++]; Z/:W.*u
a = temp; ?.ofs}
} else { ;zSV~G6-
data[k] = temp[j--]; < B!f;
b = temp[j]; waG &3m
} DLO#_t^v.
} )i:"cyoE
} wQM( |@zE}
)ri'W <l
/** $?9u;+jIR
* @param data ]SN5&S
* @param l K3&k+~$
* @param i 2\gbciJ[{(
*/ (~(FQ:L%U
private void insertSort(int[] data, int start, int len) { swMR+F#u*
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); S<5.}cR
} h}}7_I9
} -:wV3D
} Vkqfs4t
} \2Kl]G(w%y
z;>O5a>z
堆排序： xX~m Fz0C
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package org.rut.util.algorithm.support; [7[$P.MS{
]ed7Q3lq
import org.rut.util.algorithm.SortUtil; [?da BXS
:ra[e(l9
/** `g{eWY1l
* @author treeroot y }h2
* @since 2006-2-2 YL[y3&K
* @version 1.0 <4^y7]]F
*/ u%Z4 8wr
public class HeapSort implements SortUtil.Sort{ aZmbt,.V
K%SfTA1TCB
/* (non-Javadoc) "T}HH
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) >_X(rar0
*/ !m9g\8tE
public void sort(int[] data) { avqJ[R
MaxHeap h=new MaxHeap(); o/!a7>xO4
h.init(data); l_fERp#y
for(int i=0;i h.remove(); fi6_yFl
System.arraycopy(h.queue,1,data,0,data.length); v^ 1x}
} [U7r>&
U"Z%_[*
private static class MaxHeap{ OW8TiM mK
^.Q/iXgh
void init(int[] data){ O)r>AdLGn
this.queue=new int[data.length+1]; ;=8@@9
for(int i=0;i queue[++size]=data; 1EHNg<J(
fixUp(size); ?[lKft
} dw7h@9\y
} KpO%)M!/Z#
<Q.-WV]Z
private int size=0; @2 SL$0!QA
^X<ytOd5
private int[] queue; 4_\]zhS
'9 <APUyu
public int get() { [_p&,$z8[
return queue[1]; r}t%DH
} |CjdmQ u
f=40_5a6
public void remove() { u8[jD^
SortUtil.swap(queue,1,size--); iS28p
fixDown(1); nZUBblRJ)
} i)d'l<RA
file://fixdown GoKMi[b
private void fixDown(int k) { }-M%$~`
int j; =7U8`]WA
while ((j = k << 1) <= size) { =[^_x+x hE
if (j < size %26amp;%26amp; queue[j] j++; bC]GL$ph9*
if (queue[k]>queue[j]) file://不用交换 O.P:~
break; I*8_5?)g<
SortUtil.swap(queue,j,k); HLDg_ On8
k = j; )TgjaR9G
} FYeUz$/
} C`C$i>X7^
private void fixUp(int k) { n!\&X9%[8
while (k > 1) { ZD]5"oHY
int j = k >> 1; 9Dy/-%Ut9
if (queue[j]>queue[k]) KP!ctlP~
break; JxLD}$I
SortUtil.swap(queue,j,k); p\7(IhW@
k = j; v\ Xk6k
} nc%ly *
} $+ ?A[{JG
Z(-@8=0
} |Xl,~-.
vc(6lN9>
} c1p*}T
p)=Fi}#D\
SortUtil： \)vxZ!
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package org.rut.util.algorithm; %8yX6`lH
u4[3JI>
import org.rut.util.algorithm.support.BubbleSort; *.9.BD9
import org.rut.util.algorithm.support.HeapSort; h $}&N
import org.rut.util.algorithm.support.ImprovedMergeSort; ?$xZ$zW
import org.rut.util.algorithm.support.ImprovedQuickSort; KCkA4`IeM
import org.rut.util.algorithm.support.InsertSort; kycZ
import org.rut.util.algorithm.support.MergeSort; Jm8#M z
import org.rut.util.algorithm.support.QuickSort; Y8 a![
import org.rut.util.algorithm.support.SelectionSort; "b"Q0"w
import org.rut.util.algorithm.support.ShellSort; e'uI~%$NJL
Vee`q.
/** :kDHwYv$
* @author treeroot :jq
* @since 2006-2-2 2*K _RMr~
* @version 1.0 PuhFbgxy
*/ ',yY
public class SortUtil { fK|F`F2V
public final static int INSERT = 1; p}NIZ)]$
public final static int BUBBLE = 2; ;Qc_Tf=,
public final static int SELECTION = 3; 8L<GAe
public final static int SHELL = 4; nx >PZb
public final static int QUICK = 5; 8*^Q#;^~99
public final static int IMPROVED_QUICK = 6; )MZQ\8,)]
public final static int MERGE = 7; KS/1ux4x
public final static int IMPROVED_MERGE = 8; bqxbOQd
public final static int HEAP = 9; PZRm.vC)k
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public static void sort(int[] data) { yU~OfwQ
sort(data, IMPROVED_QUICK); L s=2!
} F.b;O :
private static String[] name={ ]3C&l+m$ot
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" t/K<fy 6
}; j|&?BBa9
V Z[[zYe
private static Sort[] impl=new Sort[]{ HPGi5rU
new InsertSort(), [}|-%4s
new BubbleSort(), A|V |vT7cb
new SelectionSort(), ~B%=g)w
new ShellSort(), QUp()B1
new QuickSort(), _W4i?Bde
new ImprovedQuickSort(), {4g1Wr5=
new MergeSort(), SB1\SNB
new ImprovedMergeSort(), 9qe6hF/29
new HeapSort() X 5LI
}; 1\q2;5
kEtYuf^
public static String toString(int algorithm){ g_}r)CgG|
return name[algorithm-1]; '!64_OMj'
} W :PGj0?
Af:4 XSO6
public static void sort(int[] data, int algorithm) { y(B~)T~e@
impl[algorithm-1].sort(data); W;coi4
} q79)nhC F
Z<Rz}8s
public static interface Sort { xQC.ap
public void sort(int[] data); BlS0I%SN
} AA9OElCa
:2?J#/o
public static void swap(int[] data, int i, int j) { inavi5.
int temp = data; 9)Y]05us
data = data[j]; }> k9]Y
data[j] = temp; 3_2(L"S2
} |,j6cFNw
} .!Kdi|a)