[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; &-#!]T-P:E
} e=KA|"vxh
int i1=l; ajF-T=5
int i2=mid+1; $<c0Z6f
for(int cur=l;cur<=r;cur++){ (xffU%C^
if(i1==mid+1) _uL{@(
data[cur]=temp[i2++]; 9W$FX
else if(i2>r) \`?l6'!
data[cur]=temp[i1++]; a5o&6_
else if(temp[i1] data[cur]=temp[i1++]; -~Kw~RX<(
else O)|{B>2r
data[cur]=temp[i2++]; R.Xh&@f`
} lb3:#?
} }9[E+8L1
\4y7!
} wowv>!N!X-
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改进后的归并排序: ]8*#%^
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package org.rut.util.algorithm.support; +ZeHZjd
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import org.rut.util.algorithm.SortUtil; `(A>7;]:
} y@pAeS,
/** 8"R;axeD
* @author treeroot r(./00a
* @since 2006-2-2 h32QEz-+
* @version 1.0 CqQ>"Y
*/ o9+"6V|.
public class ImprovedMergeSort implements SortUtil.Sort { l@vaupg
x_lCagRGC4
private static final int THRESHOLD = 10; D{YAEG
]Ga}+^
/* SBo>\<@
* (non-Javadoc) w=>~pYASH
* T-pes1Wu
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) v5U\E`)s
*/ dD@k{5
public void sort(int[] data) { *Q=ER
int[] temp=new int[data.length]; 6tXx--Nh
mergeSort(data,temp,0,data.length-1); jt-Cy
} P]A>"-k
iD=VNf
private void mergeSort(int[] data, int[] temp, int l, int r) { v[VUX69
int i, j, k; *Iv.W7 [
int mid = (l + r) / 2; Gv(bD6Rz
if (l == r) INZycNqm,
return; JFe %W?}.D
if ((mid - l) >= THRESHOLD) lquY_lrri
mergeSort(data, temp, l, mid); ^Nl)ocHv!
else FWqnlK#
insertSort(data, l, mid - l + 1); 7g1"s1~or
if ((r - mid) > THRESHOLD) cwiHHf>
mergeSort(data, temp, mid + 1, r); ;=piJ%k
else Htn'(Q
insertSort(data, mid + 1, r - mid); '6Dt@^-PZ
N|pjGgI
for (i = l; i <= mid; i++) { S\2QZ[u
temp = data; txM R[o_
} &RQQVki3
for (j = 1; j <= r - mid; j++) { =~Oi:+L
temp[r - j + 1] = data[j + mid]; "5*n(S{ks
} p?S:J`q
int a = temp[l]; `WvNN>R
int b = temp[r]; |r*btyOJk
for (i = l, j = r, k = l; k <= r; k++) { FT'_{e!M
if (a < b) { 6v7H?4
data[k] = temp[i++]; X^mvsY
a = temp; :Z|lGH =
} else { c(jF^ 0~
data[k] = temp[j--]; d5$2*h{^v
b = temp[j]; VXEA.Mko
} JEq0{_7
} cn1CM'Ru
} _[}r2,e
t]1j4S"pm
/** UO(B>Abp
* @param data MJ^NRT0?b
* @param l 5|2v6W!e
* @param i [9S\3&yoh
*/ No8~~
private void insertSort(int[] data, int start, int len) { PGZ.\i
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); .ruGS.nS4
} /5M@>A^?'
} 9An_zrJ%i
} fRKO> /OT
} GFd~..$
-AwR$<q'
堆排序： @@$=MSN
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package org.rut.util.algorithm.support; -N`j` zb|
u,<I%
import org.rut.util.algorithm.SortUtil; {6Tw+/`P
X51pRP $R
/** 7MIu-x|
* @author treeroot !%b.k6%>w
* @since 2006-2-2 Pe@M_ r
* @version 1.0 Qd"{2>
*/ m[&]#K6
public class HeapSort implements SortUtil.Sort{ G4g<PFx
K%9PIqK?4
/* (non-Javadoc) v w$VRPW
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) pjr,X+6o
*/ z7V74hRPX
public void sort(int[] data) { .Lz\/ OS
MaxHeap h=new MaxHeap(); SrzlR)
h.init(data); }Y\Ayl
for(int i=0;i h.remove(); a x1
System.arraycopy(h.queue,1,data,0,data.length); )2T?Z)"hO
} V~-<VM6
hY=#_r8
private static class MaxHeap{ "orZje9AC
cQEK>aAd
void init(int[] data){ AP.WTFf
this.queue=new int[data.length+1]; %0 (,f
for(int i=0;i queue[++size]=data; j~!0n[F
fixUp(size); w :2@@)pr
} Sd?:+\bS;
} :@KU_U)\
wWm1G)
private int size=0; 1GB$;0 W),
krwY_$q
private int[] queue; =1g
q:Gi Qk-
public int get() { ^44AE5TO
return queue[1]; yv||:wZC
} $(v1q[ig
B6~a `~"
public void remove() { lVY`^pw?
SortUtil.swap(queue,1,size--); !fF1tW
fixDown(1); D-*`b&i48
} Y%!3/3T
file://fixdown g+BW~e)
private void fixDown(int k) { RE/'E?G
int j; `oN~
while ((j = k << 1) <= size) { w^tNYN,i
if (j < size %26amp;%26amp; queue[j] j++; lC&U9=7W
if (queue[k]>queue[j]) file://不用交换 un|+YqLf
break; 9?B}CCE<LR
SortUtil.swap(queue,j,k); @f442@_4
k = j; f h05*]r
} ]CyWL6z
} ^sIxR*C[v
private void fixUp(int k) { {M:Fsay>p
while (k > 1) { cl4`FU
int j = k >> 1; dn/0>|5OF(
if (queue[j]>queue[k]) n[4F\I>
break; }R5>ja0
SortUtil.swap(queue,j,k); g2L^cP>2
k = j; <)c/PI[j
} {U8Sl.
} 9ui_/[K
MB|+F
} nTO,d$!Kp
4$9WJ~V{
} v!(BS,
kzPHPERA]
SortUtil： L?!*HS7m
Fy^*@&
package org.rut.util.algorithm; x,YC/J
A-<\?13uW
import org.rut.util.algorithm.support.BubbleSort; HRO:U%
import org.rut.util.algorithm.support.HeapSort; Aat_5p
import org.rut.util.algorithm.support.ImprovedMergeSort; =*0<.Lo':
import org.rut.util.algorithm.support.ImprovedQuickSort; KK"uSC
import org.rut.util.algorithm.support.InsertSort; nxH=Ut7{
import org.rut.util.algorithm.support.MergeSort; -U;2 b_
import org.rut.util.algorithm.support.QuickSort; uPbvN[~t
import org.rut.util.algorithm.support.SelectionSort; :-HVK^$%
import org.rut.util.algorithm.support.ShellSort; i-Ck:-J
M\zM-B
/** 9:zW$Gt&
* @author treeroot |x*~PXb
* @since 2006-2-2 ` MIZqHM @
* @version 1.0 fsqK(io28
*/ b|| c^f
public class SortUtil { bmN'{09@
public final static int INSERT = 1; dWV.5cViP
public final static int BUBBLE = 2; wi/Fx=w
public final static int SELECTION = 3; ; V)pXLE
public final static int SHELL = 4; ]pi"M3f_
public final static int QUICK = 5; n'a=@/
public final static int IMPROVED_QUICK = 6; JK:i-
public final static int MERGE = 7; Lqy]bnY
public final static int IMPROVED_MERGE = 8; ?EF[OyE
public final static int HEAP = 9; M]&F1<
Xy[O
public static void sort(int[] data) { ) jBPt&
sort(data, IMPROVED_QUICK); >Qg`Us#y
} ``?]13XjK
private static String[] name={ 3u+A/
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" `tKrTq>
}; @R%n &
vd`;(4i#X
private static Sort[] impl=new Sort[]{ GUyMo@g
new InsertSort(), Rn6;@Cw
new BubbleSort(), "HI&dC
new SelectionSort(), tA'O66.
new ShellSort(), |uT|(:i84,
new QuickSort(), =`fJ
new ImprovedQuickSort(), -_&"Q4FR;+
new MergeSort(), 5,
new ImprovedMergeSort(), ?K]Cs&E4
new HeapSort() 'J(rIH3U
}; 4D(5WJ&
#~]S
public static String toString(int algorithm){ SSH))zJ
return name[algorithm-1]; H4DM,.04
} e7X#C)
,S(^r1R
public static void sort(int[] data, int algorithm) { eZpyDw C{
impl[algorithm-1].sort(data); OxGKtnAjf
} F)dJws7-
bHx09F]
public static interface Sort { r}>8FE9S'H
public void sort(int[] data); "b)Y5[nW
} vsc)EM ]
.f)&;Af^
public static void swap(int[] data, int i, int j) { [JI>e;l C:
int temp = data; 1b*Me'
data = data[j]; j>f
data[j] = temp; [-}LEH1[p
} ' lt5|
} XV)<Oavs