[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; (.Sj"6+
} ZM0vB% M|
int i1=l; l{6fR(d ?
int i2=mid+1; L ej3? k
for(int cur=l;cur<=r;cur++){ fAXF_wj
if(i1==mid+1) &!_>J0
data[cur]=temp[i2++]; g\d|/HVK
else if(i2>r) A=>%KQc?
data[cur]=temp[i1++]; (FP- K
else if(temp[i1] data[cur]=temp[i1++]; DdPU\ ZWR
else j&u{a[Y/}
data[cur]=temp[i2++]; ;=aj)lemCr
} 2e#hJ-/`-
} :D;BA
SK#;/fav6
} ELPzqBI
l.El3+
改进后的归并排序: s@V4ny9x
L~=h?C<
package org.rut.util.algorithm.support; Zg_ fec~6q
~}+F$&
import org.rut.util.algorithm.SortUtil; ;5MI8
9n%vz@X
/** ?31#:Mg6g+
* @author treeroot H+6+I53
* @since 2006-2-2 ^|gD;OED7O
* @version 1.0 Gg$4O8
*/ \$$DM"+:;H
public class ImprovedMergeSort implements SortUtil.Sort { D.su^m_1
yp9vgUs
private static final int THRESHOLD = 10; 2Jm#3zFYz3
I82GZL
/* ~nDbWv"
* (non-Javadoc) QZw`+KR
* Qv~lH&jG
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) |ZC@l^a7
*/ {Dupk0'(
public void sort(int[] data) { v)1@Ew=Y%
int[] temp=new int[data.length]; rK(TekU
mergeSort(data,temp,0,data.length-1); crTRfqF
} %m)vQ\Vtx
|$
private void mergeSort(int[] data, int[] temp, int l, int r) { -Ph"#R&
int i, j, k; rU/8R'S
int mid = (l + r) / 2; k}18 ~cWM
if (l == r) S+2we
return; V96:+r
if ((mid - l) >= THRESHOLD) 1K\zamBg
mergeSort(data, temp, l, mid); >=O5=\`
else XN|[8+#U<@
insertSort(data, l, mid - l + 1); e>J.r("f
if ((r - mid) > THRESHOLD) #7v=#Jco
mergeSort(data, temp, mid + 1, r); U'*~Ju
else oDW)2*8yF
insertSort(data, mid + 1, r - mid); 'nJ,mZx
@;;3B
for (i = l; i <= mid; i++) { tw k
temp = data; gUGMoXSTI|
} BMi5F?Q'G
for (j = 1; j <= r - mid; j++) { "vvv@sYxi
temp[r - j + 1] = data[j + mid]; N.'-9hv
} *{x8@|K8
int a = temp[l]; ({$>o]<h
int b = temp[r]; <]Btx;}
for (i = l, j = r, k = l; k <= r; k++) { OjWg>v\v
if (a < b) { _*wkTI+j
data[k] = temp[i++]; ,eSII2,r4
a = temp; yByxy-~
} else { >lkjoEVQ
data[k] = temp[j--]; jI/#NCKE
b = temp[j]; xcE2hK/+
} |Ml~_m
} XcFu:B
} z?<Xx?Kk
lK Ry4~O
/** ^UmhSxQ##
* @param data ech1{v\B|
* @param l v`&>m'
* @param i \ lW*.<
*/ b?,''t
private void insertSort(int[] data, int start, int len) { ovk^
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); EG!Nsb^,
} Ju-#F@38
} w!r.MWE
} v8U&{pD,
} w&eq *q
NqC}}N\,
堆排序： ]|QA`5=$
6 m%/3>q
package org.rut.util.algorithm.support; o0kKf+[
h'B0rVQia>
import org.rut.util.algorithm.SortUtil; /u~L3Cp(
U!b~vrr^
/** NQx>u
* @author treeroot )1/J5DI @8
* @since 2006-2-2 PG{"GiZz=
* @version 1.0 Dco3`4pl
*/ k $E{'Dv
public class HeapSort implements SortUtil.Sort{ H2{&da@D5
uCjbb
/* (non-Javadoc) ~.Er
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) H,(4a2zx
*/ /Py`a1
public void sort(int[] data) { 5Z_aN|Xn
MaxHeap h=new MaxHeap(); <z QUa
h.init(data); .*Axr\x3
for(int i=0;i h.remove(); yK>s]65&
System.arraycopy(h.queue,1,data,0,data.length); [Qn=y/._r
} F\%PB p
& &:ZY4`
private static class MaxHeap{ e@DVf
2NF#mWZ(s
void init(int[] data){ Y'?{yx{
this.queue=new int[data.length+1]; MC_i"P6a
for(int i=0;i queue[++size]=data; *#Iqz9X.Y3
fixUp(size); ,-)ww:
} uDMyO<\
} yHmNO*(
]g]~!":
private int size=0; nm`}Z'&)
jN%+)Kj0C)
private int[] queue; KV|ywcGhT
pW5PF)([
public int get() { ;'oi7b
return queue[1]; iI@(Bl]
} :Oc&{z?q
GD<pqm`vVY
public void remove() { 89fl\18%
SortUtil.swap(queue,1,size--); hQLh}}B
fixDown(1); r'J3\7N!u
} trg&^{D<
file://fixdown /i IWt\J
private void fixDown(int k) { 8Og)(BC
int j; z1LY|8$G
while ((j = k << 1) <= size) { D,SL_*r{
if (j < size %26amp;%26amp; queue[j] j++; 8zH/a
if (queue[k]>queue[j]) file://不用交换 C72btS
break; 2"B3Q:0he|
SortUtil.swap(queue,j,k); _R;+}1G/
k = j; B=hJ*;:p
} *Bx'g| u
} n4G53+y'
private void fixUp(int k) { #*;Nb
while (k > 1) { {-,^3PI\
int j = k >> 1; 6WEu(}=
if (queue[j]>queue[k]) WyJXT.
break; %M;{+90p>t
SortUtil.swap(queue,j,k); {#%;HqP
k = j; dWhF[q"
} {y7,n
} Vr<ypyC
ZUUfn~ORc
} \ /6m
!Mk:rO-L
} 6882:,q
da53XEF&
SortUtil： ~*uxKEH
cRC)99HP
package org.rut.util.algorithm; Id'@!U:NA
d 3}'J
import org.rut.util.algorithm.support.BubbleSort; G/C5o=cY
import org.rut.util.algorithm.support.HeapSort; 7<c&)No;
import org.rut.util.algorithm.support.ImprovedMergeSort; R7!^ M
import org.rut.util.algorithm.support.ImprovedQuickSort; 3a#j&]
import org.rut.util.algorithm.support.InsertSort; 9wC:8@`6E
import org.rut.util.algorithm.support.MergeSort; hX@.k|Yd
import org.rut.util.algorithm.support.QuickSort; 7c Gq.U
import org.rut.util.algorithm.support.SelectionSort; IWcYa.=tZ
import org.rut.util.algorithm.support.ShellSort; u(|k/~\
g_w4}!|
/** iiZK^/P$
* @author treeroot P=9Zm
* @since 2006-2-2 dSBW&-p
* @version 1.0 >}ozEX6c2
*/ SAGLLk07G
public class SortUtil { .o5r;KD
public final static int INSERT = 1; C&ivjFf
public final static int BUBBLE = 2; <U$A_]*w
public final static int SELECTION = 3; 20f):A6
public final static int SHELL = 4; K*Tvo`
public final static int QUICK = 5; IK-E{,iKc
public final static int IMPROVED_QUICK = 6; d/OIc){tD
public final static int MERGE = 7; '2%/h4jY
public final static int IMPROVED_MERGE = 8; mckrR$>
public final static int HEAP = 9; y]`@%V2P
S:"t]gbF =
public static void sort(int[] data) { HSOdqjR*
sort(data, IMPROVED_QUICK); ZR'q.y[k)
} p=(;WnsK
private static String[] name={ _k@{> ?(a
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" (dF4F4`{
}; %?EOD=e=
pTK|u!fs
private static Sort[] impl=new Sort[]{ Y2Y2>^
new InsertSort(), 3EcmNwr
new BubbleSort(), y6o^ Knl
new SelectionSort(), O/\jkF
new ShellSort(), %zyMWC
new QuickSort(), soZw""|v
new ImprovedQuickSort(), v;;X2 a1k
new MergeSort(), _rqOzE)
new ImprovedMergeSort(), [,a O*7N
new HeapSort() 0n,5"B
}; k[Iwxl;/
morI'6N
public static String toString(int algorithm){ <5(8LMF
return name[algorithm-1]; WL}6YSC
} ~]/X,Cf
_A)<"z0E
public static void sort(int[] data, int algorithm) { Q[p0bD:
impl[algorithm-1].sort(data); )B*?se]LJ
} h{sW$WA
$YSD%/c
public static interface Sort { -H`G6oMOO
public void sort(int[] data); 5!Z+2Cu]
} VSZ6;&2^
"`"j2{9|e!
public static void swap(int[] data, int i, int j) { Xt=&
int temp = data; n/8Kb.Vf
data = data[j]; 0 \LkJ*i
data[j] = temp; #s#z@F
} d!KX.K\NM,
} pLzsL>6h