[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; o| #Qu8Lk
} c&AygqN
int i1=l; 4WJ.^(
int i2=mid+1; cFeXpj?GV
for(int cur=l;cur<=r;cur++){ dR"@`
if(i1==mid+1) d5oIH
data[cur]=temp[i2++]; '=Rs/EDME
else if(i2>r) z"0I>gl
data[cur]=temp[i1++]; 8Le||)y,\
else if(temp[i1] data[cur]=temp[i1++]; (>r[-Bft
else Cq%IE^g<
data[cur]=temp[i2++]; 4"(<X
} @>p<3_Y1
} j!]YNH@
fZ*+2T>
} vJ'2@f$
s;3={e.
改进后的归并排序: QKr,g
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package org.rut.util.algorithm.support; r]b_@hT',
~S8*t~
import org.rut.util.algorithm.SortUtil; !t gi
mT.u0KUIy
/** [/e<l&y
* @author treeroot bI:zp!-.
* @since 2006-2-2 hJZV}a|
* @version 1.0 y *fDwd~
*/ fp+gyTnd3
public class ImprovedMergeSort implements SortUtil.Sort { H[S%J3JI
n p\TlUc
private static final int THRESHOLD = 10; paKSr|O
k} |
/* #MRMNL@
* (non-Javadoc) %`&2+\`
* ,M^P!
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) l]8D7(g
*/ m+lvl
public void sort(int[] data) { UE$UR#T'w
int[] temp=new int[data.length]; 5 N#3a0)
mergeSort(data,temp,0,data.length-1); )?X-(4
} v 8$>rwB
=y0C1LD+
private void mergeSort(int[] data, int[] temp, int l, int r) { B2C$N0R#
int i, j, k; JV]^zW
int mid = (l + r) / 2; OH">b6>\
if (l == r) WJ4li@T7V
return; /f|X(docI
if ((mid - l) >= THRESHOLD) [3{W^WSOz
mergeSort(data, temp, l, mid); ]Bjyi[#bg
else z@B=:tf
insertSort(data, l, mid - l + 1); (]Y 5eM
if ((r - mid) > THRESHOLD) m<j8cJ(
mergeSort(data, temp, mid + 1, r); m^GJuPLW
else Si6al78
insertSort(data, mid + 1, r - mid); LIZRoG8
ha(Z<
for (i = l; i <= mid; i++) { .y@oz7T5
temp = data; wPwXM!
} *=+td)S/1
for (j = 1; j <= r - mid; j++) { *#tJM.Z
temp[r - j + 1] = data[j + mid]; iZaI_\"__
} !f&Kf,#b`
int a = temp[l]; :=wTvz
int b = temp[r]; }j*KcB_
for (i = l, j = r, k = l; k <= r; k++) { N6 (
if (a < b) { (^u1~1E 5
data[k] = temp[i++]; (`sH3&Kl
a = temp; "CUty"R8
} else { XT@-$%u
data[k] = temp[j--]; Gu2P\I2zx
b = temp[j]; [^U#Qj)hL
} eS<lwA_
} @8;W\L$~1
} /J:bWr
BV>\ McI+
/** .pN`;*7`
* @param data 0},PJ$8x
* @param l [&&1j@LQ*
* @param i m0cP(
*/ rzh#CnL3
private void insertSort(int[] data, int start, int len) { pO ml8SQf
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); %2XHNW
} MD|5 ol9
} ;S57w1PbVA
} &:,dJ
} jF=gr$
1DvR[Lx%
堆排序： {`K m_<Te!
QrYpZZ;
package org.rut.util.algorithm.support; * v75O7l
{a4z2"\A
import org.rut.util.algorithm.SortUtil; )0Me?BRp
\ aHVs
/** U2ZD]q
* @author treeroot \9/ b!A
* @since 2006-2-2 ? P( ZA
* @version 1.0 ub;ZtsM,%
*/ \>7^f 3m
public class HeapSort implements SortUtil.Sort{ {|1Y:&M?
.8y3O]
/* (non-Javadoc) )e a:Q?
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) (Nx;0"5IX
*/ h\PHKC2
public void sort(int[] data) { J,AR5@)1
MaxHeap h=new MaxHeap(); _c,'>aH=
h.init(data); +=.W<b
for(int i=0;i h.remove(); Kwg4sr5"D
System.arraycopy(h.queue,1,data,0,data.length); n(L\||#+
} 4Qo]nre!
XI9js{p
private static class MaxHeap{ uwjGDw
`kU/NKq
void init(int[] data){ \U[{z&]~
this.queue=new int[data.length+1]; =9"W@n[>W
for(int i=0;i queue[++size]=data; T)Y=zIQ1]7
fixUp(size); j& <i&
} 6Qx#%,U^ J
} 8'f4 Od ?
IiZ&Pr
private int size=0; -mRA#
,;(PwJe
private int[] queue; pGK;1gVj
&&VqD w
public int get() { yb/%?DNQT
return queue[1]; l"2OP6d
} `g6h9GC6
uvV;Mlo]
public void remove() { v0YG,)_
SortUtil.swap(queue,1,size--); R8T]2?Q1
fixDown(1); '*k'i;2/1
} tWoh''@#
file://fixdown GF5^\Rf
private void fixDown(int k) { E5N{j4\F
int j; ea~:}!-P
while ((j = k << 1) <= size) { OBP1B@|l$+
if (j < size %26amp;%26amp; queue[j] j++; 2c:#O%d(
if (queue[k]>queue[j]) file://不用交换 *H.oP
break; ,I_^IitN
SortUtil.swap(queue,j,k); &bp=`=*
k = j; ,iv|Pq$!
} ")!,ZD
} #*g5u{k'P
private void fixUp(int k) { `zE}1M%y
while (k > 1) { %LZ({\5K#f
int j = k >> 1; a\:VREKj,
if (queue[j]>queue[k]) kJ-*fe'S
break; aBw2f[mo
SortUtil.swap(queue,j,k); * C6a?]
k = j; i![dPM
} (>I`{9x>6
} l+g9 5mjP
pTyi!:g3W
} 3Bx:Ntx<
!ZI7&r`u;
} ;x8k[p~2
Wxbq)Z[V
SortUtil： OLvcivf
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package org.rut.util.algorithm; u*#ZXW
Hw-Z
import org.rut.util.algorithm.support.BubbleSort; f4guz
import org.rut.util.algorithm.support.HeapSort; Eyh51IB.
import org.rut.util.algorithm.support.ImprovedMergeSort; Q]w&N30
import org.rut.util.algorithm.support.ImprovedQuickSort; \0H's{uek
import org.rut.util.algorithm.support.InsertSort; j`*#v
import org.rut.util.algorithm.support.MergeSort; ,57`D'
import org.rut.util.algorithm.support.QuickSort; !DI{:I_h(
import org.rut.util.algorithm.support.SelectionSort; z ly unJD(
import org.rut.util.algorithm.support.ShellSort; \a=D
DVkB$2]
/** v^_mFp-}\
* @author treeroot {|yob4N
* @since 2006-2-2 fz3lV
* @version 1.0 ~35U]s@v
*/ /2HN>{F^Y
public class SortUtil { Cc, `}SP
public final static int INSERT = 1; %T[^D&9$,
public final static int BUBBLE = 2; ]wWPXx[>/
public final static int SELECTION = 3; WwUv5GZTW
public final static int SHELL = 4; C{q:_M;
public final static int QUICK = 5; v,\R,{0
public final static int IMPROVED_QUICK = 6; +\{&2a?
public final static int MERGE = 7; 1& '8Y
public final static int IMPROVED_MERGE = 8; WMBm6?54
public final static int HEAP = 9; `r_m+]
k~|-gfFP
public static void sort(int[] data) { D Kw*~0
sort(data, IMPROVED_QUICK); j$7Xs"
} F|HJH"2*&q
private static String[] name={ 6O22P?v
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" \J6hI\/4^
}; &V<W>Y>|l*
W7\&~IWub
private static Sort[] impl=new Sort[]{ Cb_oS4vM
new InsertSort(), )#}mH@
new BubbleSort(), KPpHwcYxT
new SelectionSort(), G5,~Z&}YS
new ShellSort(), )|I5j];L
new QuickSort(), wfP5@!I
new ImprovedQuickSort(), "sKa`WN}
new MergeSort(), u^j {U}
new ImprovedMergeSort(), MCP "GZK6W
new HeapSort() `W-&0|%Ta
}; @YH+cG|
nWvuaQ0}
public static String toString(int algorithm){ V&|!RxWK
return name[algorithm-1]; rJo"fx
} /2m?15c+
Hku!bJ
public static void sort(int[] data, int algorithm) { fbkd"7u
impl[algorithm-1].sort(data); ,\aUq|~
} !gmH$1w
7HHysNB"w
public static interface Sort { 0ilCS[`b
public void sort(int[] data); fof2 xcH!
} Zv_jy@k
C P3<1~
public static void swap(int[] data, int i, int j) { er.CDKD%L
int temp = data; :vL1}H<
data = data[j]; 1H,g=Y4f%
data[j] = temp; 7 ua6l[c
} 8v)_6p(<x8
} EOoZoVdzx