[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; s_EiA _
} {^$rmwN
int i1=l; eQzSWn[
int i2=mid+1; JX>_imo
for(int cur=l;cur<=r;cur++){ @0Tm>s
if(i1==mid+1) [&)9|EV
data[cur]=temp[i2++]; }bjTb!
else if(i2>r) .5_w^4`b
data[cur]=temp[i1++]; *-` /A
else if(temp[i1] data[cur]=temp[i1++]; m#'u;GP]k
else %Ix^Xb0
data[cur]=temp[i2++]; 2/(gf[elX
} tPFV6n i
} ;QW)tv.y
3%k@,Vvt
} /z5j.TMs
qRB&R$
改进后的归并排序: umD .
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package org.rut.util.algorithm.support; M62V NYt
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import org.rut.util.algorithm.SortUtil; >/evL /
) ~ C)4
/** Sh{odrMj*
* @author treeroot |)GE7y0Q
* @since 2006-2-2 cl14FrpYu
* @version 1.0 ?XW+&!ar
*/ 2nOQ48haT
public class ImprovedMergeSort implements SortUtil.Sort { RwY) O5
&eg]8kV
private static final int THRESHOLD = 10; #Wh"_zpM+
gp(w6:w
/* S(/@.gI:f
* (non-Javadoc) *|hICTWL
* $+V{2k4X,
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) MqXA8D
*/ K;S&91V)=
public void sort(int[] data) { %~$4[,=
int[] temp=new int[data.length]; KRm4r
mergeSort(data,temp,0,data.length-1); >Li ~Og@
} [wIyW/+
>(d+E\!A
private void mergeSort(int[] data, int[] temp, int l, int r) { saYn\o"m
int i, j, k; ]3Mm"7`
int mid = (l + r) / 2; F~<$E*&h@
if (l == r) e|]g?!
return; ezHj?@
if ((mid - l) >= THRESHOLD) Nb(se*Y#
mergeSort(data, temp, l, mid); B/pNM81(
else D`,@EW].
insertSort(data, l, mid - l + 1); C^l)n!fq
if ((r - mid) > THRESHOLD) 6n;ewl}
mergeSort(data, temp, mid + 1, r); @(Q4
else &X +@,!
insertSort(data, mid + 1, r - mid); sOVaQ&+y
Lf7iOW9U3
for (i = l; i <= mid; i++) { ,]20I _
temp = data; PP$Ig2Q
} 1AA(qE
for (j = 1; j <= r - mid; j++) { 4!iS"QH?;^
temp[r - j + 1] = data[j + mid]; i~k?k.t8
} qdUlT*fw
int a = temp[l]; F'|,(P
int b = temp[r]; hq\KSFP
for (i = l, j = r, k = l; k <= r; k++) { x"_f$,:!
if (a < b) { | M-@Qvgh
data[k] = temp[i++]; e#&[4tQF
a = temp; ;?%2dv2d
} else { `| R8WM
data[k] = temp[j--]; @AVx4,!>[
b = temp[j]; I>G)wRpfR'
} b\H(Lq17
} bncK8SK
} 4zfgtg(
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/** Fv e,&~
* @param data QDxLy aL
* @param l nef-xxXC^I
* @param i uCmdNY
*/ 7|65;jm+
private void insertSort(int[] data, int start, int len) { lm-ubzJN
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); v mw7H
} r|0C G^:C
} Re,0RM\
} WDgp(Av!
} nE::9Yh8z
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堆排序： zCPjuS/~ Q
1NJ*EzJ~?
package org.rut.util.algorithm.support; Ya\G/R
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import org.rut.util.algorithm.SortUtil; 8v(Xr}q,r
Na3tK}x
/** xp><7{
* @author treeroot ?55('+{l
* @since 2006-2-2 PS \QbA
* @version 1.0 r]8tl
*/ |(y6O5Y.
public class HeapSort implements SortUtil.Sort{ Rra(/j<rQ
nb?bx{M
/* (non-Javadoc) 4+l7v?:Pr
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) /?2yo{Fg
*/ %;^6W7
public void sort(int[] data) { f\/};a
MaxHeap h=new MaxHeap(); gU+BRTZ&x
h.init(data); (Grj_p6O
for(int i=0;i h.remove(); F \} Kh3
System.arraycopy(h.queue,1,data,0,data.length); zXVQLz5
} @/|sOF;8W
;zz"95X7
private static class MaxHeap{ LnR3C:NO k
+wT,dUin_<
void init(int[] data){ &+%CC
this.queue=new int[data.length+1]; Z<ke!H
for(int i=0;i queue[++size]=data; oJXZ}>>iT
fixUp(size); tDIzn`$z
} B-M|}T
} jY ^ndr0;
]1D>3
private int size=0; 7W}~c/%
i?*&1i@
private int[] queue; h1)p{5}H
1F[; )@
public int get() { j-yD;N
return queue[1]; MZL~IX
} /<|J\G21
mc9$"
public void remove() { <-FZ-asem
SortUtil.swap(queue,1,size--); kC LeHH|K
fixDown(1); T5Pc2R
} ?&/9b)cS
file://fixdown aY3kww`
private void fixDown(int k) { G-,PsXSwe
int j; :5@7z9 >
while ((j = k << 1) <= size) { w8>T ~Mv
if (j < size %26amp;%26amp; queue[j] j++; 7d'@Z2%J0
if (queue[k]>queue[j]) file://不用交换 .@=d I
break; :i:Zc~%
SortUtil.swap(queue,j,k); wl(}F^:/`
k = j; RZ?>>Ll6
} ?8vjHEE
} _>3GNvS
private void fixUp(int k) { !kmo%+
while (k > 1) { (v(_XlMK
int j = k >> 1; `bt]v$
if (queue[j]>queue[k]) X*FK6,Y|(
break; : PQA9U|
SortUtil.swap(queue,j,k); O7rm(
k = j; O#u)~C?)8
} ~ RTjcE
} @h^5*M
'@pav>UPD
} p4aM`PW8>=
14zo0ANM
} fI}-?@
r2U2pAy#
SortUtil： +86\&y)
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package org.rut.util.algorithm; X>*zA?:
G.<9K9K
import org.rut.util.algorithm.support.BubbleSort; C'zMOR6c
import org.rut.util.algorithm.support.HeapSort; tx5@r;
import org.rut.util.algorithm.support.ImprovedMergeSort; gs0,-)
import org.rut.util.algorithm.support.ImprovedQuickSort; :%!SzI?
import org.rut.util.algorithm.support.InsertSort; Txp~&a03
import org.rut.util.algorithm.support.MergeSort; _VY]
import org.rut.util.algorithm.support.QuickSort; ?]paAP;4
import org.rut.util.algorithm.support.SelectionSort; )Dqv&^
import org.rut.util.algorithm.support.ShellSort; 3c-ve$8u~
I94;1(Cs%
/** F}.Af=<Q
* @author treeroot 39k P)cD
* @since 2006-2-2 nz>A\H
* @version 1.0 $dwv1@M2
*/ %iJ6;V4
public class SortUtil { r-[z!S
public final static int INSERT = 1; (<8T*Xo
public final static int BUBBLE = 2; )FU4iN)ei
public final static int SELECTION = 3; R@"N{ [9
public final static int SHELL = 4; ]~a!O
public final static int QUICK = 5; xnh%nv<v{
public final static int IMPROVED_QUICK = 6; IXzad
public final static int MERGE = 7; ,QKG$F
public final static int IMPROVED_MERGE = 8; [3/P EDkw
public final static int HEAP = 9; YK}(VF?&
Qt@~y'O
public static void sort(int[] data) { %t<Y6*g
sort(data, IMPROVED_QUICK); <v5toyA
} EH,uX{`e
private static String[] name={ /~AwX8X
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" IM +Dm
}; <GoE2a4Va
n.7 $*9)#
private static Sort[] impl=new Sort[]{ QjQJ "
new InsertSort(), sPd5f2'
new BubbleSort(), gHox{*hb[
new SelectionSort(), d(]LRIn~1
new ShellSort(), 4J I;NN
new QuickSort(), !gT6So
new ImprovedQuickSort(), -u8@ .
new MergeSort(), ?Bh}
new ImprovedMergeSort(), ~t#'X8.)
new HeapSort() qqkZbsN
}; lgnF\)
;M'R/JlUN
public static String toString(int algorithm){ rylllJz|L:
return name[algorithm-1]; Gg-<3z
} ` 0\hm`
Z?v9ub~%
public static void sort(int[] data, int algorithm) { ? 4.W _
impl[algorithm-1].sort(data); m{V@Om
} .Hgiru&
kxf'_Nzy
public static interface Sort { OSSMIPr
public void sort(int[] data); +}^} <|W6
} Z2 t0l%
F92n)*[
public static void swap(int[] data, int i, int j) { q<;9!2py
int temp = data; ly^F?.e-
data = data[j]; wvUph[j}J
data[j] = temp; <-lz_
} `ZNjA},.
} pwu5Fxn)