[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; 9=p^E#d
} [#S}L(
int i1=l; [4KW64%l
int i2=mid+1; rnz9TmN:*1
for(int cur=l;cur<=r;cur++){ 9tvLj5~
if(i1==mid+1) Z6F>SL
data[cur]=temp[i2++]; L s6P<"V
else if(i2>r) TO7%TW{L
data[cur]=temp[i1++]; J*?BwmD'8
else if(temp[i1] data[cur]=temp[i1++]; eY^;L_7}p
else l=G=J(G
data[cur]=temp[i2++]; 0vbiq
} i>#[*.|P
} PYX]ld.E
R{uq8NA- W
} OoL#8R
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改进后的归并排序: 69AgPAv<k
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package org.rut.util.algorithm.support; s\A"B#9r
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import org.rut.util.algorithm.SortUtil; $Ay j4|_-
*<?or"P
/** HH =sq
* @author treeroot "X4L+]"$g
* @since 2006-2-2 6yEYX'_
* @version 1.0 ~Vq<nkWS
*/ e]R`B}vO
public class ImprovedMergeSort implements SortUtil.Sort { \-3\lZ3qj
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private static final int THRESHOLD = 10; )2t!= ua
mGR}hsQpn
/* }`M53>C,gQ
* (non-Javadoc) kNqSBzg
* {?tK]g#
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 9i4!^DM_
*/ DtkY;Yl
public void sort(int[] data) { ?0k(wiF
int[] temp=new int[data.length]; @*SgeLeL
mergeSort(data,temp,0,data.length-1); k{_ Op/k}V
} NMq#D$T
#LRN@?P
private void mergeSort(int[] data, int[] temp, int l, int r) { v_-S#(
int i, j, k; nk.m Gny
int mid = (l + r) / 2; U(#)[S,
if (l == r) #>~<rcE(
return; >'IFr9&3
if ((mid - l) >= THRESHOLD) Us4J[MW<
mergeSort(data, temp, l, mid); V mxVE=l
else {;.q?mj
insertSort(data, l, mid - l + 1); ~<b/%l>h1
if ((r - mid) > THRESHOLD) qFEGV+
mergeSort(data, temp, mid + 1, r); sjh>i>t
else ];BGJ5^j
insertSort(data, mid + 1, r - mid); Nu!(7
h%'4V<V
for (i = l; i <= mid; i++) { [^wEKRt&
temp = data; ~3k& =3d]
} e1Kxqw7
for (j = 1; j <= r - mid; j++) { (eX9O4
temp[r - j + 1] = data[j + mid]; ,>"rcd
} RiHOX&-7
int a = temp[l]; !e~Yp0gX#
int b = temp[r]; Jh1Q)05
for (i = l, j = r, k = l; k <= r; k++) { Ki#({~
if (a < b) { /Mk85C79
data[k] = temp[i++]; 3V")~m
a = temp; [$; \1P/
} else { z{h#l!Edh
data[k] = temp[j--]; `J*~B
b = temp[j]; L<'8#J[_5
} 97"dOi!Wh
} =+um:*a.
} a*4"j2j v
w)x`zVwO
/** 3L2@C%
* @param data .Q'/e>0
* @param l Wxjv=#3
* @param i w k1O*_76
*/ Uh.XL=wY
private void insertSort(int[] data, int start, int len) { mKWfRx*UdG
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); (hywT)#+
} >dH5n$Gb
} ) V}q7\G~
} *2MM
} Q_}i8p'
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堆排序： k~|nU
a`}b'X:
package org.rut.util.algorithm.support; C N9lK29F)
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import org.rut.util.algorithm.SortUtil; Y-(),k_Q:
?h`Ned0P
/** 1$,t:/'-4
* @author treeroot <0[{Tn
* @since 2006-2-2 StUiL>9T#
* @version 1.0 +3VDapfin
*/ p%304oP6
public class HeapSort implements SortUtil.Sort{ bS 'a)
Mwdh]I,#
/* (non-Javadoc) ZdQm&?
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) >:l;W4j
*/ oo\0X
public void sort(int[] data) { YJgw%UVJ5m
MaxHeap h=new MaxHeap(); JL~QE-pvD
h.init(data); b`Wn98s
for(int i=0;i h.remove(); z-G|EAON"/
System.arraycopy(h.queue,1,data,0,data.length); &y1' J
} ?p{xt$<p
0x'-\)v>3
private static class MaxHeap{ i<D}"h|
%hK?\Pg3=E
void init(int[] data){ NN5V|# P}
this.queue=new int[data.length+1]; &s!"pEZWck
for(int i=0;i queue[++size]=data; G9\Bi-'ul
fixUp(size); l ' ]d&
} Wpom{-
} 9kPwUAw
oF/5mh__(K
private int size=0; 9%\<x
]d"4G7mu`l
private int[] queue; H[o'j@0
&]~z-0`$!
public int get() { @+",f]
return queue[1]; G'XlsyaWrb
} bw#zMU^E
4QWDuLu
public void remove() { 9H*$3
SortUtil.swap(queue,1,size--); &fYx0JT
fixDown(1); b5YjhRimS
} S~vbISl
file://fixdown ZTG*|
private void fixDown(int k) { ?uUK9*N
int j; 8?']W\)
while ((j = k << 1) <= size) { HMNjQ 1y
if (j < size %26amp;%26amp; queue[j] j++; *[*#cMZ
if (queue[k]>queue[j]) file://不用交换 6G"AP~|0
break; cL*D_)?8
SortUtil.swap(queue,j,k); *iF>}yhe
k = j; puS'9Lpp
} ,=lMtW
} ^DHFP-G?e
private void fixUp(int k) { L>{E8qv>w
while (k > 1) { [!{*)4$6
int j = k >> 1; 64}Oa+*s
if (queue[j]>queue[k]) q`09
break; )8oI s
SortUtil.swap(queue,j,k); wgSA6mQZ
k = j; ,_`\c7@
} KdFQlQaj
} gcr,?rE<
zQxZR}'
} AO;`k]0e
9>psQ0IRvr
} MoA2Cp;8X
3y>.1
SortUtil： u*[,W-R&
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package org.rut.util.algorithm; D_O%[u}
q /|<>s
import org.rut.util.algorithm.support.BubbleSort; yY*OAC
import org.rut.util.algorithm.support.HeapSort; D@qq=M
import org.rut.util.algorithm.support.ImprovedMergeSort; ]M{SM`Ya
import org.rut.util.algorithm.support.ImprovedQuickSort; j._9;HifZ
import org.rut.util.algorithm.support.InsertSort; ltt%X].[
import org.rut.util.algorithm.support.MergeSort; >82Q!HaH
import org.rut.util.algorithm.support.QuickSort; E?&dZR
import org.rut.util.algorithm.support.SelectionSort; 'q1)W'
import org.rut.util.algorithm.support.ShellSort; ?7G?uk]3,@
N##T1 Qm)
/** %'`Dd
* @author treeroot pw:<a2.
* @since 2006-2-2 2Iz@lrO6
* @version 1.0 =,-80WNsX
*/ FqsG#6|x
public class SortUtil { >;o^qi_$
public final static int INSERT = 1; $${ebt
public final static int BUBBLE = 2; u4$d#0sA
public final static int SELECTION = 3; ]V]~I.
public final static int SHELL = 4; ci5ERv`
public final static int QUICK = 5; 9{i6g+
public final static int IMPROVED_QUICK = 6; 9R>A,x(
public final static int MERGE = 7; ]*juF[r(
public final static int IMPROVED_MERGE = 8; OjMDxG w
public final static int HEAP = 9; NNutpA}s
D.qbzJz
public static void sort(int[] data) { t>&$_CSWK
sort(data, IMPROVED_QUICK); %S>lPt
} ]S,I}NP
private static String[] name={ *v:+AE
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" }?*:uf
}; L7n->8Qk
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private static Sort[] impl=new Sort[]{ g_>)Q
new InsertSort(), peGXU/5.I
new BubbleSort(), ,Q(n(m'
new SelectionSort(), bLu6|YB
new ShellSort(), JS&l h
new QuickSort(), S?hM
new ImprovedQuickSort(), R9S7p)B
new MergeSort(), XpOsnvW
new ImprovedMergeSort(), 8 gOK?>'9
new HeapSort() Dr(.|)hv[&
}; I"sKlMD
l:Ci'=
public static String toString(int algorithm){ TKoO\\
return name[algorithm-1]; }M'\s
} 9jaYmY]~
s26s:A3rh
public static void sort(int[] data, int algorithm) { a+\Gz
impl[algorithm-1].sort(data); J;m[1Mae&
} mg'-]>$$]
3zWY%(8t4?
public static interface Sort { _PNU*E%s<
public void sort(int[] data); F1Egcx/$V
} t47 f$gq
34JkB+#a
public static void swap(int[] data, int i, int j) { c)@M7UK[
int temp = data; 4CX*
data = data[j]; $6fHY\i#R
data[j] = temp; \jq1F9,
} *I'O_D
} .vQ2w