[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; ti5mIW\
} GC>e26\:
int i1=l; 8B/\U'
int i2=mid+1; s8ywKTR-
for(int cur=l;cur<=r;cur++){ S]bmS6#
if(i1==mid+1) q1z"-~i)E
data[cur]=temp[i2++]; Jy)KqdkX+
else if(i2>r) /j4P9y^]=
data[cur]=temp[i1++]; ".W8)
else if(temp[i1] data[cur]=temp[i1++]; <vUbv
else Z3#P,y9@
data[cur]=temp[i2++]; KV}FZ3jY
} qs1 ?IYD
} m+b):
?%O(mC]u&
} '?!zG{x
~k!j+>yT
改进后的归并排序: 4,sJE2"[9
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package org.rut.util.algorithm.support; Q3 u8bx|E
w\(.3W7
import org.rut.util.algorithm.SortUtil; NL!u<6y
0O9Ni='Tn
/** >OL3H$F
* @author treeroot /q<__N
* @since 2006-2-2 nH`Q#ZFz]?
* @version 1.0 {t0) q
*/ q|j2MV5#g
public class ImprovedMergeSort implements SortUtil.Sort { W{5#@_pL
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private static final int THRESHOLD = 10; 5k`l$mW{
%6t2ohO"
/* )Hpa}FGT
* (non-Javadoc) Z)! qW?
* Ka[t75~;
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) QIB\AAclO
*/ uehDIl0\[b
public void sort(int[] data) { I/&%]"[^u
int[] temp=new int[data.length]; **$LR<L
mergeSort(data,temp,0,data.length-1); Gcdd3W`O
} .}q&5v
A;*d}Xe&J
private void mergeSort(int[] data, int[] temp, int l, int r) { ]Bcp;D
int i, j, k; E;Y;z
int mid = (l + r) / 2; GO__$%~
if (l == r) 55tKTpV
return; v*;-yG&
if ((mid - l) >= THRESHOLD) ex::m&
mergeSort(data, temp, l, mid); ]b\yg2
else 23c 8
insertSort(data, l, mid - l + 1); M[mF8Zf
if ((r - mid) > THRESHOLD) %e-7ubW
mergeSort(data, temp, mid + 1, r); zbk q
else ^5H >pat
insertSort(data, mid + 1, r - mid); .$qnZWcgG
<R''oEf9
for (i = l; i <= mid; i++) { F$ #U5}Q
temp = data; 1`(tf6op
} p^Ak1qm~e
for (j = 1; j <= r - mid; j++) { jFASX2.p
temp[r - j + 1] = data[j + mid]; S<VSn}vn
} <J`0mVOX
int a = temp[l]; g'H$R~ag
int b = temp[r]; ^su<uG<R
for (i = l, j = r, k = l; k <= r; k++) { jzDuE{
if (a < b) { d Vj_8>
data[k] = temp[i++]; z2g3FUTX)b
a = temp; VKq=7^W
} else { :pGaFWkvO
data[k] = temp[j--]; 4Uphfzv3D
b = temp[j]; o=50>$5jlS
} 7s/u(~d)
} vr6MU<
} cd(GvX'
H,DM1Z9rz
/** V!lZ\)
* @param data lr`&mZ( j
* @param l qAn!RkA
* @param i pi Z[Y 5OE
*/ OW3sS+y
private void insertSort(int[] data, int start, int len) { w2 a1mU/
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); \HKxh:F'
} YL]Z<%aKt
} 5Ow[~p"l<
} vRs,zL$W
} TygW0b 1
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堆排序： :c8&N-`
E^vJ@O
package org.rut.util.algorithm.support; \#Pfj&*
.}O[dR
import org.rut.util.algorithm.SortUtil; _a6[{_Pc
~yH?=:>U
/** swM*k;$q{
* @author treeroot AS =?@2 q
* @since 2006-2-2 ^>jwh
* @version 1.0 Xc?&_\. +
*/ .?R!DYC`
public class HeapSort implements SortUtil.Sort{ }T&iewk
XZ^^%*ew
/* (non-Javadoc) {ys=Ndo8
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) v2B0q4*BS?
*/ =<?+#-;p
public void sort(int[] data) { -Z 4e.ay5
MaxHeap h=new MaxHeap(); 555XCWyrC
h.init(data); -_1>C\h"
for(int i=0;i h.remove(); wB!Nc Y\p
System.arraycopy(h.queue,1,data,0,data.length); WU71/PYm`
} 1JztFix
xT
private static class MaxHeap{ .(^ ,z&
f33l$pOp
void init(int[] data){ - `p4-J!Fy
this.queue=new int[data.length+1]; ] Hztb
for(int i=0;i queue[++size]=data; 2/"u5
fixUp(size); IIn"=g=9
} G/7cK\^u
} ?d{Na=O\
xx#zN0I>-y
private int size=0; `< xn8h9p
3HcQ(+Z
private int[] queue; nlW +.a[
7ccO93Mz
public int get() { j2QmxTa!
return queue[1]; /SrCElabP
} 45,1-? -!
?u" 4@
public void remove() { mF,Y?ax
SortUtil.swap(queue,1,size--); zi]\<?\X
fixDown(1); &Low/Y'.jJ
} |}(`kW
file://fixdown FaDjLo2'o
private void fixDown(int k) { mP0yk|
int j; m^ tFi7c
while ((j = k << 1) <= size) { y:~ZLTAv
if (j < size %26amp;%26amp; queue[j] j++; rA%usaW
if (queue[k]>queue[j]) file://不用交换 -o$QS,
break; '}B+r@YCN
SortUtil.swap(queue,j,k); Q9Kve3u-i
k = j; Gn ~6X-l
} G!>z;5KuS
} e\!0<d
private void fixUp(int k) { t!r A%*
while (k > 1) { ihIVUu-M
int j = k >> 1; Kx;eaz:gx
if (queue[j]>queue[k]) eHn7iuS8
break; <vONmE a
SortUtil.swap(queue,j,k); __|+w<]
k = j; .QZaGw=,z
} + HK8jCa
} i36eBjT
SL#0kc0x
} U%q7Ai7
}BZ"S-hZ
} ]yK7PH-{L
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SortUtil： OY;*zk
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package org.rut.util.algorithm; ~Y|*`C_)
@mw5~+
import org.rut.util.algorithm.support.BubbleSort; k <=//r
import org.rut.util.algorithm.support.HeapSort; ca7=V/i_a{
import org.rut.util.algorithm.support.ImprovedMergeSort; ;7?kl>5]
import org.rut.util.algorithm.support.ImprovedQuickSort; wt!nMQ
import org.rut.util.algorithm.support.InsertSort; /s@oZ{h
import org.rut.util.algorithm.support.MergeSort; VyzS^AHK
import org.rut.util.algorithm.support.QuickSort; e4HA7=z
import org.rut.util.algorithm.support.SelectionSort; =5/9%P8j9
import org.rut.util.algorithm.support.ShellSort; 8<8:+M}
pTPi@SBaP{
/** lI*o@wQg
* @author treeroot !F A]
* @since 2006-2-2 6p?,(
* @version 1.0 jL%x7?*U0
*/ /& Jan:
public class SortUtil { ADDSCY=,
public final static int INSERT = 1; ++6`sMJ
public final static int BUBBLE = 2; pEBM3r!X
public final static int SELECTION = 3; (tIo:j
public final static int SHELL = 4; gy#/D& N[
public final static int QUICK = 5; 3RYpJAH
public final static int IMPROVED_QUICK = 6; u%}nw :>
public final static int MERGE = 7; e1%/26\
public final static int IMPROVED_MERGE = 8; 5*lT.
public final static int HEAP = 9; [N7{WSZ&
F`gi_;c
public static void sort(int[] data) { 0ZZZoPo
sort(data, IMPROVED_QUICK); %E#s\B,w
} _ba>19csq%
private static String[] name={ #gz M|
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 9$cWU_q{
}; /67 h&j
g.BdlVB\
private static Sort[] impl=new Sort[]{ q"\Z-D0B4
new InsertSort(), 7gj4j^a^]{
new BubbleSort(), AgS7J(^&3
new SelectionSort(), wQ^EYKD
new ShellSort(), -:|?h{q?u
new QuickSort(), `o=q%$f#k~
new ImprovedQuickSort(), }4 )H
new MergeSort(), iII=;:p
new ImprovedMergeSort(), )wC?T
new HeapSort() Q.l}NtHwV
}; uJzG|$;
@;*Ksy@1O
public static String toString(int algorithm){ (s.0PO`
return name[algorithm-1]; c6h.iBJ'
} c0,0`+2~
sDPs G5q<
public static void sort(int[] data, int algorithm) { o /j*d3
impl[algorithm-1].sort(data); (;T^8mI2
} :r{<zd>;
/]K^ rw[
public static interface Sort { a1EOJ^}0
public void sort(int[] data); &"yx<&c}
} ]^h]t~
T|nDTezr
public static void swap(int[] data, int i, int j) { z@!`:'ak
int temp = data; "W6uV!
data = data[j]; OLyf8&AU@
data[j] = temp; gG0!C))8
} BXtCSfY$
} 4Jp:x"w