[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; 2w1Mf<IXPo
} `hG`}G|^
int i1=l; N`N=}&v ]
int i2=mid+1; T$r/XAs
for(int cur=l;cur<=r;cur++){ BDPE.8s
if(i1==mid+1) pcscNUp
data[cur]=temp[i2++]; r/NaoIrJV
else if(i2>r) *1b0IQ$g
data[cur]=temp[i1++]; ;XZN0A2
else if(temp[i1] data[cur]=temp[i1++]; B$JPE7h@[P
else Q2)5A&U\
data[cur]=temp[i2++]; XZ$g~r
} Dqwd=$2%
} '#j6ZC/?
KdHkX+-R
} }>y~P~`S:
lc fAb@}2
改进后的归并排序: (?XIhpd
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package org.rut.util.algorithm.support; ]CS N7Q+l
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import org.rut.util.algorithm.SortUtil; MxGQM>
a>8]+@
/** d^IX(y*$
* @author treeroot v\!Cq+lFML
* @since 2006-2-2 Edh9=sxL
* @version 1.0 d9e~><bPJ
*/ j/T@-7^0
public class ImprovedMergeSort implements SortUtil.Sort { T=V{3v@zs
$[cB6
private static final int THRESHOLD = 10; UDcr5u eKn
IWN18aaL?
/* S$wC{7?f
* (non-Javadoc) VOATza`
* ]NWcd~"b!Z
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) KU+u.J
*/ l&] %APL
public void sort(int[] data) { MB>4Y]rtU
int[] temp=new int[data.length]; Z *l&<q>#
mergeSort(data,temp,0,data.length-1); ~]W @+\l
} 066\zAPdH
Ug gg!zA
private void mergeSort(int[] data, int[] temp, int l, int r) { @{<^rLt
int i, j, k; 5 8U[IGs(
int mid = (l + r) / 2; eK3d_bF+
if (l == r) 4T)`%Oo<}
return; +['1~5
if ((mid - l) >= THRESHOLD) n^G[N-\3
mergeSort(data, temp, l, mid); +W[{UC4b
else V*%><r
insertSort(data, l, mid - l + 1); 1)N#
if ((r - mid) > THRESHOLD) LG("<CU
mergeSort(data, temp, mid + 1, r); vPy."/[u
else KV{
insertSort(data, mid + 1, r - mid); #f=41d%
0!:%Ge_
for (i = l; i <= mid; i++) { 2ss*&BR.
temp = data; 65+2+p
} XL1x8IB
for (j = 1; j <= r - mid; j++) { Esj1Vv#
temp[r - j + 1] = data[j + mid]; ^q}phj3E
} &;vMJ
int a = temp[l]; YO@~y*,
int b = temp[r]; *a(GG
for (i = l, j = r, k = l; k <= r; k++) { [Q8vS;.
if (a < b) { <1~_nt~(*
data[k] = temp[i++]; [*ug:PG
a = temp; $9Xn.,W
} else { 1':};}dCJ
data[k] = temp[j--]; 90<a'<\|
b = temp[j]; mG*Yv
} !*"#*)S.
} FB~IO#E8W
} G)3r[C^[k
jR3mV
/** [-)BI|S:
* @param data ;t.)A3 PL
* @param l 56Lt "Z F
* @param i 2XjH1
*/ xWWVU}fd1
private void insertSort(int[] data, int start, int len) { %~Wr/TOt+
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); h)r=+Q\'(S
} AY9#{c>X
} Djp;\.$(
} u@4khN: ^p
} vcOw`oS
N;cSR\Ng
堆排序： }hc+ENh
W=K+kB
package org.rut.util.algorithm.support; >+[{m<Eq
#J$z0%P
import org.rut.util.algorithm.SortUtil; kL -f@CD
%LnG^L
/** # *7ImEN
* @author treeroot hi ),PfAV
* @since 2006-2-2 dhr-tw
* @version 1.0 }A<fCm7
*/ drB$q[Ak9
public class HeapSort implements SortUtil.Sort{ '"V]>)
//}KWz
/* (non-Javadoc) OL@' 1$/A
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) cN:ek|r
*/ |f[:mO
public void sort(int[] data) { A^7}:[s20
MaxHeap h=new MaxHeap(); Ec!R3+
h.init(data); Q2t>E(S
for(int i=0;i h.remove(); [g lhru=+
System.arraycopy(h.queue,1,data,0,data.length); Qy'-3GB
} };~I#X
\.`{nq
private static class MaxHeap{ 9+frxD&pO
q{Gf@
void init(int[] data){ ]7%+SH,RdD
this.queue=new int[data.length+1]; 'u%SI]*;>
for(int i=0;i queue[++size]=data; TI637yqCU
fixUp(size); frbeCBP&)
} ]nx5E_j2
} I oC}0C7
-Rr Qv(
private int size=0; FmtV[C#
+C`zI~8
private int[] queue; RjG=RfB'V
0/b3]{skK
public int get() { pm'i4!mY<P
return queue[1]; T|h'"3'
} jRSY`MU}t+
w?A6S-z
public void remove() { 1H7bPl|
SortUtil.swap(queue,1,size--); 43o!Vr/S
fixDown(1); N/eFwv.Er
} q-d#bKIf
file://fixdown ;Qdw$NuW
private void fixDown(int k) { ?8@EBPpC
int j; eRvnN>L
while ((j = k << 1) <= size) { xSZ+6R|
if (j < size %26amp;%26amp; queue[j] j++; U jB5Xks
if (queue[k]>queue[j]) file://不用交换 0^zp*u
break; |C.[eHe&D
SortUtil.swap(queue,j,k); ]ZM-c~nL
k = j; =F90SyzTy
} C!S(!Z,
} _6{XqvWqb
private void fixUp(int k) { aj@<4A=;
while (k > 1) { 'mU7N<Q$qQ
int j = k >> 1; }Jk=ZBVjT7
if (queue[j]>queue[k]) C(lGW,!
break; s N|7
SortUtil.swap(queue,j,k); f|-%.,
k = j; "gGv>]3
} p+O,C{^f
} #tQ__V
`{W>Dy
} "o>gX'm*
Fd/.\s
} <B3$ODGJp
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SortUtil： $z*Y:vFP
w2e9Ue~WH
package org.rut.util.algorithm; D0a3%LBS/2
^h\Y.
import org.rut.util.algorithm.support.BubbleSort; x^P~+(g
import org.rut.util.algorithm.support.HeapSort; 9a lMC
import org.rut.util.algorithm.support.ImprovedMergeSort; *Z C$DW!-
import org.rut.util.algorithm.support.ImprovedQuickSort; ]J>{ZL
import org.rut.util.algorithm.support.InsertSort; JN:EcVuy
import org.rut.util.algorithm.support.MergeSort; S67>yqha
import org.rut.util.algorithm.support.QuickSort; :Vl2\H=P
import org.rut.util.algorithm.support.SelectionSort; OXCf
import org.rut.util.algorithm.support.ShellSort; 76rRF
mj9r#v3.
/** NoG`J$D
* @author treeroot <m!(eLm+B
* @since 2006-2-2 47 *,
* @version 1.0 [Uw/;Kyh
*/ hj|P*yKV
public class SortUtil { Ec;{N
public final static int INSERT = 1; ZVX!=3VT
public final static int BUBBLE = 2; 5zR9N>!c
public final static int SELECTION = 3; f+iM_MI
public final static int SHELL = 4; ^t#W?rxp&
public final static int QUICK = 5; !%s&GD8&l
public final static int IMPROVED_QUICK = 6; {Wp5Ane
public final static int MERGE = 7; $MB/j6#j
public final static int IMPROVED_MERGE = 8; Eggdj+
public final static int HEAP = 9; wEJ) h1=)^
s`Z'5J;S
public static void sort(int[] data) { v<c@bDZ>
sort(data, IMPROVED_QUICK); d0MF\yxh
} kz+OUA@~
private static String[] name={ ;&v~tD7
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" ri?>@i-9=
}; uy^vQ/
"o.g}Pv
private static Sort[] impl=new Sort[]{ p{BBqKv
new InsertSort(), FqT2+VO~
new BubbleSort(), 2N$yn
new SelectionSort(), Zn]njf1x
new ShellSort(), N! N>/9
new QuickSort(), DsZBhjCB
new ImprovedQuickSort(), a= *qsgPGL
new MergeSort(), e;ej/)no`
new ImprovedMergeSort(), ="*:H)
new HeapSort() Y4.t:Uzr
}; zPKx: I3
}g\1JSJ%H
public static String toString(int algorithm){ drc]"6 k
return name[algorithm-1]; ~gAp`Q
} ;mw$(ZKa#
_K5R?"H0
public static void sort(int[] data, int algorithm) { C+=8?u<
impl[algorithm-1].sort(data); V<%eWT)x7C
} ~$\9T.tre2
>PBP:s1f4>
public static interface Sort { [%`L sY
public void sort(int[] data); Ja@zeD)f"
} =T0;F0@#4
~7}aW#
public static void swap(int[] data, int i, int j) { 71GyMtX
int temp = data; &+v!mw>
data = data[j]; $V0G[!4
data[j] = temp; }KZt7)
} <@puWm[p
} X>W2aDuEZ