[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; _K 4eD.
} _JfJ%YXy
int i1=l; B)(p9]q
int i2=mid+1; +J\L4ri k
for(int cur=l;cur<=r;cur++){ OI)&vQ5k
if(i1==mid+1) V`WI"HO+
data[cur]=temp[i2++]; SIKk|I)
else if(i2>r) *O2^{ C
data[cur]=temp[i1++]; 6^7)GCq [
else if(temp[i1] data[cur]=temp[i1++]; ^hQ:A4@q
else {LR#(q$1
data[cur]=temp[i2++]; F2Nb5WT
} q$e T!'x
} )_Z]=5Ds
f]@[4<Ny
} yVbg,q'?
9'L1KQ
改进后的归并排序: \#h})`
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package org.rut.util.algorithm.support; nOA,x
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import org.rut.util.algorithm.SortUtil; &-EyM*:u!
!?tu! M<1?
/** mSVX4XW<
* @author treeroot xEd#~`Jmr
* @since 2006-2-2 KD[)O7hYC
* @version 1.0 I1eb31<
*/ ONg<
public class ImprovedMergeSort implements SortUtil.Sort { 7LyV`6{70
`Z;B^Y0
private static final int THRESHOLD = 10; I(iGs I
yKX:Z4I/
/* [4V|UvKz
* (non-Javadoc) *YiD B?Si
* ;DT"S{"7
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) f4@#pnJ3po
*/ +#i,87
public void sort(int[] data) { @n~ND).
int[] temp=new int[data.length]; Px^<2Q%Fs
mergeSort(data,temp,0,data.length-1); DcFV^8O&
} qqO10~Xc
1*eWvYo1
private void mergeSort(int[] data, int[] temp, int l, int r) { N?`GZ+5
int i, j, k; H7cRWB
int mid = (l + r) / 2; q(${jz4w
if (l == r) mtHi9).,y|
return; ;r2b@x:<_
if ((mid - l) >= THRESHOLD) &`\kb2uep
mergeSort(data, temp, l, mid); <)0LwkFtB
else ,rvZW}=
insertSort(data, l, mid - l + 1); :u|UVp5
if ((r - mid) > THRESHOLD) ,M9hb<:m
mergeSort(data, temp, mid + 1, r); 6=[ PJM
else 'E4(!H,k
insertSort(data, mid + 1, r - mid); u.xA}yVS
S+E3;' H
for (i = l; i <= mid; i++) { [;kj,j
temp = data; "p_[A
} zfT'!kb,(
for (j = 1; j <= r - mid; j++) { "}azC|:5
temp[r - j + 1] = data[j + mid]; r0XGGLFuZl
} s\K-(`j}
int a = temp[l]; D-;43>yi<
int b = temp[r]; RWEgUDX^/
for (i = l, j = r, k = l; k <= r; k++) { #7E&16Fk
if (a < b) { r%?}5"*
data[k] = temp[i++]; uma9yIk
a = temp; A5J#x6@
} else { L:];[xa%
data[k] = temp[j--]; ,'@ISCK^
b = temp[j]; h: (l+jr
} 39^uLob
} l=.InSuLT
} ?eZ"UGZg'
Xwn|.
/** >?Y3WPB<F
* @param data )Z`viT
* @param l b9!J}hto,
* @param i W71#NjM2Z
*/ ]{l O
private void insertSort(int[] data, int start, int len) { JZ*?1S>
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); Lw78v@dY
} .m % x-i
} n ;fTx
} mm~o%1|WR
} % w/1Uo24
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堆排序： Sv[_BP\^h
\~m%4kzG8J
package org.rut.util.algorithm.support; [}B{e=`!
X([n>w
import org.rut.util.algorithm.SortUtil; I2!&="7@
b8xfV{3L
/** {d5ur@G1
* @author treeroot vt7C
* @since 2006-2-2 JL+[1=uE1L
* @version 1.0 TEy.zzt
*/ +]2~@=<@
public class HeapSort implements SortUtil.Sort{ uTFEI.N
mCP +7q7
/* (non-Javadoc) ,}$x'8v
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) |zegnq~
*/ _p^ "!
public void sort(int[] data) { 1+[|pXT}
MaxHeap h=new MaxHeap(); 'g, x}6
h.init(data); gG|1$
for(int i=0;i h.remove(); v8M#%QoA
System.arraycopy(h.queue,1,data,0,data.length); YV+dUvz
} IOsDVIXL\
<qZ+U4@I)
private static class MaxHeap{ Lr]Hvd
B~?Q. <M
void init(int[] data){ |L#r)$n{1
this.queue=new int[data.length+1]; JaN_[ou
for(int i=0;i queue[++size]=data; B$eF@v"
fixUp(size); >.sN?5}y
} o*S $j Cf?
} m.X+sP-e
6R,b 8
private int size=0; "uNxKLDB
sX?7`n1U
private int[] queue; \?IwR]@y
/ =<ul-K
public int get() { + {dIs
return queue[1]; |1 6v4 R
} lBC-G*#
]@g$<&
public void remove() { c.> (/
SortUtil.swap(queue,1,size--); q/G5aO*
fixDown(1); S :|*wB
} nlnJJM&J$
file://fixdown RlL,eU$CS
private void fixDown(int k) { F'Vl\qPt
int j; (KU@hp-\
while ((j = k << 1) <= size) { VAzJclB
if (j < size %26amp;%26amp; queue[j] j++; 2C&%UZim;P
if (queue[k]>queue[j]) file://不用交换 n[-!Jp[
break; ,_-*/- 7;8
SortUtil.swap(queue,j,k); J4X35H=Z
k = j; QQcj"s
} 8hA=$}y&x
} gWPa8q<b
private void fixUp(int k) { N/=3Bs0y-
while (k > 1) { uwzT? C A6
int j = k >> 1; &d;$k
if (queue[j]>queue[k]) 1\kehCt
break; GjG3aqP&!
SortUtil.swap(queue,j,k); _J!mhUA
k = j; #+\G- =-
} v\FD~
} \]El%j4
9m!fW|4
} 2N]s}/l
n5/Q)*e0'#
} q"oNB-bz
j&5Xjl>4
SortUtil： }lVUa{ubf
A@r,A?(
package org.rut.util.algorithm; 3\7$)p+c
7a net
import org.rut.util.algorithm.support.BubbleSort; ;;5i'h~?]J
import org.rut.util.algorithm.support.HeapSort; UJ:B:hh''
import org.rut.util.algorithm.support.ImprovedMergeSort; m6D4J=59
import org.rut.util.algorithm.support.ImprovedQuickSort; b.&YUg[#
import org.rut.util.algorithm.support.InsertSort; nc)`ISI
import org.rut.util.algorithm.support.MergeSort; yW 3h_08
import org.rut.util.algorithm.support.QuickSort; jK53-tF~I
import org.rut.util.algorithm.support.SelectionSort; 5JXLfYTUI
import org.rut.util.algorithm.support.ShellSort; Z%R^;8!~
XLT<,B}e
/** 1wt]J!hgV
* @author treeroot @T"385>
* @since 2006-2-2 ?a@l.ZM*
* @version 1.0 ;Lu|fQ#u*
*/ QR4o j
public class SortUtil { dQ]j r.
public final static int INSERT = 1; _NFJm(X.
public final static int BUBBLE = 2; &PX'=UT
public final static int SELECTION = 3; Hw? J1#1IE
public final static int SHELL = 4; 5Mr:(|JyV
public final static int QUICK = 5; 26A#X
public final static int IMPROVED_QUICK = 6; Qsa2iw{
public final static int MERGE = 7; ||f4f3R'
public final static int IMPROVED_MERGE = 8; KMV!Hqkk
public final static int HEAP = 9; 4~4Hst#^
^&Bye?`5
public static void sort(int[] data) { i{2KMa{K
sort(data, IMPROVED_QUICK); 5|Qr"c$p
} ]CjODa
private static String[] name={ E2MpMR
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" {+;8dtZ)x
}; eR CGr?e4
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private static Sort[] impl=new Sort[]{ 9YKEME+:
new InsertSort(), !wgj$5Rw.
new BubbleSort(), f[w$3
new SelectionSort(), 15COwc*k
new ShellSort(), _~!,x.Dbp
new QuickSort(), 7_RU*U^
new ImprovedQuickSort(), 4J s>yP
new MergeSort(), =LRUasF
new ImprovedMergeSort(), #!2gxm;g
new HeapSort() vzL>ZBeZ
}; !E%!,
Po5}Vh
public static String toString(int algorithm){ 0*q:p`OLw*
return name[algorithm-1]; x;+,lP
} QO8/?^d
&>-Cz%IV
public static void sort(int[] data, int algorithm) { hRP0Djc
impl[algorithm-1].sort(data); SNQ+ XtoO
} ?@~FT1"6G
I ?1E}bv
public static interface Sort { }V 1sY^C
public void sort(int[] data); .D :v0Zm}m
} z, OMR`W
;RU)Q)a)
public static void swap(int[] data, int i, int j) { !`SR$dnE
int temp = data; _u>+H#
data = data[j]; f:TW<
data[j] = temp; '&"7(8E} *
} H Q2-20
} 4ngiad6bR