[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; rfs(#
} >GXXjAIu/
int i1=l; bKMWWJf*'
int i2=mid+1; nL+p~Hi
for(int cur=l;cur<=r;cur++){ o'Wz*oY))\
if(i1==mid+1) O2.'-
data[cur]=temp[i2++]; >7'+ye6z
else if(i2>r) O$qtq(Q%
data[cur]=temp[i1++]; /kB|1gFj
else if(temp[i1] data[cur]=temp[i1++]; *YtB )6j
else Q(Gyq:L=>
data[cur]=temp[i2++]; t0Zk-/s
} abi[jxCG
} U]hF
_ 5"+Dv
} ZjD)?4
+~Tu0?{Z 0
改进后的归并排序: ZIpD{>/
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package org.rut.util.algorithm.support; d yh<pX/$
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import org.rut.util.algorithm.SortUtil; {,?ss$L
7?J3ci\
/** /[K_ &
* @author treeroot m`y9Cuk
* @since 2006-2-2 dU]/$7
* @version 1.0 H(|AH;?ou
*/ ?^u^im
public class ImprovedMergeSort implements SortUtil.Sort { 2.-o@im0
u7s"0f`
private static final int THRESHOLD = 10; +-BwQ{92[:
{6*#3m Kk
/* +ZA)/
* (non-Javadoc) ~$<UE}qp
* CqFeF?xd8h
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) =dzWmL<~8
*/ $DebXxJw0l
public void sort(int[] data) { kz B\'m,l
int[] temp=new int[data.length]; khx.yRx
mergeSort(data,temp,0,data.length-1); raE Mm
} 19c@`?
3[d>&xk@$
private void mergeSort(int[] data, int[] temp, int l, int r) { Gb2L }
int i, j, k; 4^*,jS-9g}
int mid = (l + r) / 2; *k [J6
if (l == r) &|9.}Z8U
return; h2~4G)J
if ((mid - l) >= THRESHOLD) T95t"g?p
mergeSort(data, temp, l, mid); W.I\J<=V
else %}3qR~;
insertSort(data, l, mid - l + 1); 8(f:U@BS
if ((r - mid) > THRESHOLD) 6>`c1 \8f
mergeSort(data, temp, mid + 1, r); +G*JrwJ&=
else c_.-b=zm
insertSort(data, mid + 1, r - mid); 9QwKakci
mwC=o5O
for (i = l; i <= mid; i++) { ''H"^oS
temp = data; SeEw.;Xw
} ,LhCFw{8?~
for (j = 1; j <= r - mid; j++) { $t}<85YCQ
temp[r - j + 1] = data[j + mid]; Sk}{E@
} MS3=~*+
int a = temp[l]; "OmD@ EMT
int b = temp[r]; +f|BiW
for (i = l, j = r, k = l; k <= r; k++) { a.2L*>p
if (a < b) { Y?K{(szo ?
data[k] = temp[i++]; d2N:^vvvR
a = temp; Vh|\_~9
} else { A+getdr
data[k] = temp[j--]; t2>fmQIQ
b = temp[j]; LWnR?Qve<
} VT%:zf
} k;ZxY"^
} "=1;0uy]
o-C#|t3hH
/** @7oL#-
* @param data 0bS|fMgc
* @param l (R!hjw~
* @param i -0C@hM,wm
*/ 1}%B%*N
private void insertSort(int[] data, int start, int len) { T{+Z(L
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); rl08R
} pkgjTXR2b
} BlA[T%
} LR(-<"
} 4_/?:$KO
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堆排序： MGJ.,tK1
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package org.rut.util.algorithm.support; Wb}c=hZv
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import org.rut.util.algorithm.SortUtil; &;&ho+qD
X;oa[!k
/** 9$qm>,o
* @author treeroot (kv?33
* @since 2006-2-2 _)T5lEFl=
* @version 1.0 r|u MovnV
*/ N$>^g"6o
public class HeapSort implements SortUtil.Sort{ aj^wRzJ}zA
P!G858V(
/* (non-Javadoc) <{5EdX
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) #S]ER907
*/ qOih`dla
public void sort(int[] data) { q 11IkDa
MaxHeap h=new MaxHeap(); |yEa5rd?W
h.init(data); BZ54*\t
for(int i=0;i h.remove(); {X(:jAy
System.arraycopy(h.queue,1,data,0,data.length); <r#eL39I
} Vw||!d
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private static class MaxHeap{ -i yyn^|
.mLK`c6
void init(int[] data){ f y:,_#
this.queue=new int[data.length+1]; q@t0NvNSu
for(int i=0;i queue[++size]=data; )G^ KDj"
fixUp(size); ",7Q
} *!s;"U
} #|&Sc_#4)
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private int size=0; YG[;"QR
#9-P%%kQ
private int[] queue; U4aU}1RKz
/='. 4v
public int get() { ]vWKR."4
return queue[1]; VXIP0p@
} 2EZb )&Q
Y2o?gug
public void remove() { $6OkIP.
SortUtil.swap(queue,1,size--); gL_Y,A~Q{
fixDown(1); 3 @ak<9&
} 'u4<BQVV[
file://fixdown }by;F9&B
private void fixDown(int k) { ks$JP6
int j; pn.wud}R
while ((j = k << 1) <= size) { q\m2EURco
if (j < size %26amp;%26amp; queue[j] j++; $,+O9Et
if (queue[k]>queue[j]) file://不用交换 ),G=s Oo
break; #wL
SortUtil.swap(queue,j,k); OQW#a[=WQ
k = j; e/0<[s*#Q
} M`rl!Ci#
} 91=OF*w
private void fixUp(int k) { n2)q}_d
while (k > 1) { 3s/H2fz
int j = k >> 1; fFb_J`'ue
if (queue[j]>queue[k]) QFYWA1<pDh
break; Tb3J9q+ya
SortUtil.swap(queue,j,k); O+y-}7YX
k = j; LaQ-=;(`
} _?OW0x4
} DxUKUE
.C8PitS
} sCR67/
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} uV!^,,~
Q09[[
SortUtil： gw,UQbnu
ma"3qGy
package org.rut.util.algorithm; kS bu]AB
UrqRx?#
import org.rut.util.algorithm.support.BubbleSort; +=O5YR!{
import org.rut.util.algorithm.support.HeapSort; `s\?w5[
import org.rut.util.algorithm.support.ImprovedMergeSort; g!rQ4#4
import org.rut.util.algorithm.support.ImprovedQuickSort; .Fdgb4>BXX
import org.rut.util.algorithm.support.InsertSort; :2 *g~6
import org.rut.util.algorithm.support.MergeSort; 0q&<bV:D
import org.rut.util.algorithm.support.QuickSort; 9FB19
import org.rut.util.algorithm.support.SelectionSort; -r-k_6QP
import org.rut.util.algorithm.support.ShellSort; u(fm@+$^
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/** D#3\y*-y?
* @author treeroot rg^'S1x|
* @since 2006-2-2 XUz3*rfs
* @version 1.0 bD/~eIcWL
*/ 3AU;>D^5
public class SortUtil { Kx>qz.wwI?
public final static int INSERT = 1; Pi]19boM.
public final static int BUBBLE = 2; xai*CY@cQ
public final static int SELECTION = 3; _f$^%?^
public final static int SHELL = 4; YB-h.1T-
public final static int QUICK = 5; ;M)QwF1
public final static int IMPROVED_QUICK = 6; z6*X%6,8
public final static int MERGE = 7; N@t|7~
public final static int IMPROVED_MERGE = 8; wK?vPS
public final static int HEAP = 9; Tj:B!>>
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public static void sort(int[] data) { -[cTx[Z,
sort(data, IMPROVED_QUICK); ~_/(t'9
} Qk:Y2mL
private static String[] name={ 7pe\M/kl
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" uScMn/%
}; A"L&a l$i
gt@m?w(
private static Sort[] impl=new Sort[]{ Yt;MV)
new InsertSort(), <sBbT`
new BubbleSort(), ML|FQ
new SelectionSort(), 02c':a=7
new ShellSort(), RZXjgddL
new QuickSort(), <g"{Wv: h
new ImprovedQuickSort(), Y$"O VC
new MergeSort(), %5(I/zB
new ImprovedMergeSort(), jYk&/@`Ly
new HeapSort() #d6)#:uss
}; hb}+A=A=+
o]4*|ARPs
public static String toString(int algorithm){ ? m DI#~)
return name[algorithm-1]; E|iQc8gr&
} ~"nxE
.+$Q<L
public static void sort(int[] data, int algorithm) { <3LbNFP
impl[algorithm-1].sort(data); 32&;`]C
} M/b Sud?@%
.(K)?r-g5
public static interface Sort { ~E17L]ete
public void sort(int[] data); Y3Yz)T}UkS
} JRB9rSN^
oKuI0-*mR
public static void swap(int[] data, int i, int j) { "&Y`+0S8
int temp = data; ;r<^a6B
data = data[j]; IxY|>5z
data[j] = temp; b,7k)ND1F
} !2%HhiB'
} ,o86}6Ag