[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; tr'95'5W.
} mC93 &0
int i1=l; Q;^([39DI
int i2=mid+1; K8RloDjk_A
for(int cur=l;cur<=r;cur++){ uV\=EDno
if(i1==mid+1) )1i)I?m
data[cur]=temp[i2++]; O'mX7rY<<(
else if(i2>r) lq9c2xK
data[cur]=temp[i1++]; BF@VgozW
else if(temp[i1] data[cur]=temp[i1++]; '%~zu]f'
else \o3i9Q9C
data[cur]=temp[i2++]; (<<eHf,@
} +22[ h@
} ahf$#UQLb
@a3<fmJ
} *Js<VR
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改进后的归并排序: ~_oTEXT^O
lA ,%'+-
package org.rut.util.algorithm.support; 4t+88e
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import org.rut.util.algorithm.SortUtil; |zUDu\MZ{
xFvSQ`sp
/** |Y99s)2&N
* @author treeroot v EX <9
* @since 2006-2-2 VEpQT Qp
* @version 1.0 n/8fv~zU
*/ AKWw36lm
public class ImprovedMergeSort implements SortUtil.Sort { Gs9jX/#
u*U?VZ5
private static final int THRESHOLD = 10; Y{S/A*X
m[7a~-3:J
/* $i2gOz
* (non-Javadoc) <l6CtK@
* . =+7H`A
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) %8-S>'g'
*/ CkflEmfe
public void sort(int[] data) { #&/*ll)
int[] temp=new int[data.length]; iN)@Cu7
mergeSort(data,temp,0,data.length-1); Gmc"3L
} yZ P+
q)vD "{0.
private void mergeSort(int[] data, int[] temp, int l, int r) { IaJ(T>"+
int i, j, k; un/R7"
int mid = (l + r) / 2; #z~oc^J^T
if (l == r) z/TZOFaM
return; jIW:O
if ((mid - l) >= THRESHOLD) duqu}*Jw
mergeSort(data, temp, l, mid); ]#qdA(Kl
else C8jZcs#4
insertSort(data, l, mid - l + 1); uI%[1`2N-
if ((r - mid) > THRESHOLD) l&yR-FJ7KY
mergeSort(data, temp, mid + 1, r); ~Ch`A@=5
else JxWHrsh[
insertSort(data, mid + 1, r - mid); Jv?e?U
I2Us!W>6-
for (i = l; i <= mid; i++) { [_~U<
temp = data; DUtpd|
} #}gc6T~0
for (j = 1; j <= r - mid; j++) { ox*Ka]
temp[r - j + 1] = data[j + mid]; |~/{lE=I
} p\HXE4d'
int a = temp[l]; fvx0]of
int b = temp[r]; R'3i { 1
for (i = l, j = r, k = l; k <= r; k++) { -cW5v
if (a < b) { ~9n@MPS^!
data[k] = temp[i++]; *?8Q:@:
a = temp; b 9?w _
} else { 4VooU [Ka(
data[k] = temp[j--]; FD6|>G
b = temp[j]; x=Ru@nK;
} 1TVTP2&Rd
} BAPi<U'D
} "-Ns1A8
l nZ=< T
/** HOw][}M_w
* @param data [Cs2H8=#
* @param l }FK6o 6
* @param i &@Q3CCDS
*/ f+1]#"9i|
private void insertSort(int[] data, int start, int len) { V*AG0@&!
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); qB&*"gf
} a2i
} j4l7Tx
} (I+-wki"e
} IFE C_F>
x;SrJVDN
堆排序： 4*54"[9Hr#
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package org.rut.util.algorithm.support; IKU-
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import org.rut.util.algorithm.SortUtil; /yOd]N;$
pUPb+:^R
/** <ya3|ycnS
* @author treeroot *7R3EUUk
* @since 2006-2-2 kSJWQ
* @version 1.0 fT@#S}t
*/ k`&mHSk-
public class HeapSort implements SortUtil.Sort{ (;n|>l?*
@M,_mX
/* (non-Javadoc) 87HVD Di
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) OUs2)H61
*/ !At_^hSqz
public void sort(int[] data) { o#T,vu0s
MaxHeap h=new MaxHeap(); |9%>R*
h.init(data); "[8](3\v
for(int i=0;i h.remove(); $nVTN.k
System.arraycopy(h.queue,1,data,0,data.length); V^0*S=N
} ^qDkSoqC"
55;xAsG
private static class MaxHeap{ _zOzHc?Q
/Ly%-py-$
void init(int[] data){ IlE! zRA
this.queue=new int[data.length+1]; p7k0pSt
for(int i=0;i queue[++size]=data; Q`oi=OYB
fixUp(size); #e#8I7P
} ;6]+/e7O
} *L^{p.K4
=tP|sYR]^
private int size=0; )sL:iGU
CEUR-LK0
private int[] queue; W w8[d
N( /PJJ~
public int get() { !Khsx
return queue[1]; a@ lK+t
} w3& F e=c
c_".+Fa
public void remove() { $$8"i+,K
SortUtil.swap(queue,1,size--); 9LFg":
fixDown(1); T&!>lqU!J
} +zlaYHj
file://fixdown GJW1|Fk
private void fixDown(int k) { E:i3 /Ep?
int j; KctD=6
while ((j = k << 1) <= size) { ^C'k.pV n~
if (j < size %26amp;%26amp; queue[j] j++; [A3hrSw
if (queue[k]>queue[j]) file://不用交换 $<yb~z7J
break; auO^v;s
SortUtil.swap(queue,j,k); G,XFS8{%
k = j; 1 t#Tp$
} k_^d7yH
} MTF:mLJ
private void fixUp(int k) { 2x{3'^+l
while (k > 1) { >g F
int j = k >> 1; $EtZ5?qS
if (queue[j]>queue[k]) ;~@2YPj
break; X-ml0 =M[
SortUtil.swap(queue,j,k); <oR Nd3d
k = j; iWvgCm4
} Ii"cDH9
} rbJ-vEzo.#
l&C%oW
} O}D]G%,m
S'A~9+
} EatpORq
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SortUtil： PM_q"}-
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package org.rut.util.algorithm; Fc nR}TE
JL*-L*|Zcl
import org.rut.util.algorithm.support.BubbleSort; }q~A( u
import org.rut.util.algorithm.support.HeapSort; Z|j8:Ohz
import org.rut.util.algorithm.support.ImprovedMergeSort; \V&ly/\ )
import org.rut.util.algorithm.support.ImprovedQuickSort; L$jRg
import org.rut.util.algorithm.support.InsertSort; +ivz
import org.rut.util.algorithm.support.MergeSort; ir\
import org.rut.util.algorithm.support.QuickSort; bG5c~
import org.rut.util.algorithm.support.SelectionSort; .t["kaA
import org.rut.util.algorithm.support.ShellSort; Gd'^vqo<
E2\)>YF{P
/** x^SE>dy ?z
* @author treeroot !,1~:*:
* @since 2006-2-2 iBc( @EJ
* @version 1.0 u]oS91
*/ gHm^@
public class SortUtil { Mk^o*L{H
public final static int INSERT = 1; IP~g7`Y
public final static int BUBBLE = 2; UL{Xe&sT
public final static int SELECTION = 3; )JZfC&,
public final static int SHELL = 4; #S1)n[
public final static int QUICK = 5; fCTjTlh
public final static int IMPROVED_QUICK = 6; D}_\oE/n
public final static int MERGE = 7; bhg"<I
public final static int IMPROVED_MERGE = 8; Oo#wPT;1^(
public final static int HEAP = 9; #7g~Um%p
&'(:xjN
public static void sort(int[] data) { zL>nDnL 4
sort(data, IMPROVED_QUICK); zKI(yC
} F 6SIhf.;
private static String[] name={ 'T.> oP0>
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 1~_]"Y'
}; PPmZ[N9(;
K7y}R%QF
private static Sort[] impl=new Sort[]{ a#mdD:,cF
new InsertSort(), $+rdzsf)+/
new BubbleSort(), .Wb),
new SelectionSort(), Xe* L^8+
new ShellSort(), mWigy`V^~
new QuickSort(), '9b<r7\@
new ImprovedQuickSort(), 3nG(z>
new MergeSort(), b9:E0/6
new ImprovedMergeSort(), tnTr&o#
new HeapSort() Pl 5+Oo
}; gzuM>lf*{
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public static String toString(int algorithm){ ]P 2M
return name[algorithm-1]; yhTe*I=Gk
} $YW z~^f
&18} u~M
public static void sort(int[] data, int algorithm) { PAqziq.
impl[algorithm-1].sort(data); NW~n+uk5v
} dz7*a{
]5} =r
public static interface Sort { ZM5[ o m
public void sort(int[] data); 7IFUsli]
} &\5T`|~)!
=JEnK_@?K\
public static void swap(int[] data, int i, int j) { 0$P40 7
int temp = data; 0w\gxd~'
data = data[j]; [.0R"|$sy+
data[j] = temp; n RXf\*"3
} (3_2h4O
} E]+W^VG