[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; MpOc
} V]?R>qhgu
int i1=l; l}P=/#</T
int i2=mid+1; |1Z)E+q*:
for(int cur=l;cur<=r;cur++){ 3__-nV
if(i1==mid+1) /zox$p$?h
data[cur]=temp[i2++]; EiaW1Cs
else if(i2>r) {2gwk8
data[cur]=temp[i1++]; ,/U6[P_C5
else if(temp[i1] data[cur]=temp[i1++]; :~SyL!
else J9 I:Q<;
data[cur]=temp[i2++]; _(zG?]y0P
} WfRXP^a
} 3iU=c&P
Qv ?"b
} #s9aI_
^kSqsT"
改进后的归并排序: 0IWf!Sk ]
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package org.rut.util.algorithm.support; 4{Z)8;QX
h>bx}$q
import org.rut.util.algorithm.SortUtil; (QiAisE
fTX;.M/%
/** kSo"Ak!
* @author treeroot DIUjn;>k8
* @since 2006-2-2 o,wUc"CE
* @version 1.0 HOJV,9v N
*/ :MDKC /mC
public class ImprovedMergeSort implements SortUtil.Sort { @KUWxFak
=WJNWt>
private static final int THRESHOLD = 10; `QY)!$mUIF
nT)vNWT=
/* 8JUwf
* (non-Javadoc) iam1V)V
* LXCx~;{\
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) {7pli{`
*/ D3K8F@d
public void sort(int[] data) { 3 8`<:{^Y
int[] temp=new int[data.length]; xd0 L{ue.
mergeSort(data,temp,0,data.length-1); ]]Ufas9
} %N_%JK\{@
)WFr</z5bA
private void mergeSort(int[] data, int[] temp, int l, int r) { *gz{.)W
int i, j, k; BD7Ni^qI$
int mid = (l + r) / 2; S`]k>' l
if (l == r) "J3x_~,[4m
return; ,v}k{( 16{
if ((mid - l) >= THRESHOLD) [1H^3g '
mergeSort(data, temp, l, mid); -|9=P\U8S
else \lNN Msd&
insertSort(data, l, mid - l + 1); e@YK@?^#N
if ((r - mid) > THRESHOLD) rQ snhv
mergeSort(data, temp, mid + 1, r); '}#9)}x!
else Ef{Vp;]
insertSort(data, mid + 1, r - mid); UR5`ue ;
;xn0;V'=
for (i = l; i <= mid; i++) { J4U1t2@)9
temp = data; [opGZ`>)j"
} ;]:@n;c\
for (j = 1; j <= r - mid; j++) { caX< n>
temp[r - j + 1] = data[j + mid]; h!9ei6
} ygl0k \
int a = temp[l]; dUdT7ixo
int b = temp[r]; T&7qC=E#5
for (i = l, j = r, k = l; k <= r; k++) { zp?`N;
if (a < b) { 11;zNjD|
data[k] = temp[i++]; J<lO= +mg
a = temp; oe~b}:
} else { -`6+UkOV[x
data[k] = temp[j--]; P0jtp7)7
b = temp[j]; Fv`,3aNB
} 6;5Ss?ep
} iDrZc
} Q=yg8CQ
;YL i{
/** Z;)%%V%o
* @param data h2J x]FJ
* @param l BING{ew
* @param i El"Q'(:/U
*/ zT-_5uZQ
private void insertSort(int[] data, int start, int len) { lU8Hd|@-
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); K!l5coM
} K\c#ig
} BTrn0
} ;i+#fQO7Q
} P=G3:eX
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堆排序： lks!w/yCF
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package org.rut.util.algorithm.support; d m%8K6|
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import org.rut.util.algorithm.SortUtil; hP&Bt
U~7c+}:c
/** ufT`"i
* @author treeroot m&yJzMW|
* @since 2006-2-2 '1/i"yoW
* @version 1.0 |$_sX9\`?|
*/ @U}1EC{A
public class HeapSort implements SortUtil.Sort{ H} g{Cr"Ex
|LKXOU c
/* (non-Javadoc) DM>eVS3}
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) VVOd]2{
*/ 3sZ\0P}
public void sort(int[] data) { ,s;UfF
MaxHeap h=new MaxHeap(); 5l*&>C[(i
h.init(data); G,w(d@
for(int i=0;i h.remove(); Thit
System.arraycopy(h.queue,1,data,0,data.length); VY\&8n}e(
} SasJic2M
R{T$[$6S
private static class MaxHeap{ Xla~Yg
65^9
void init(int[] data){ _:27]K:
this.queue=new int[data.length+1]; x-3\Ls[I
for(int i=0;i queue[++size]=data; <2qr}K{'A
fixUp(size); Hj,A5#|=J
} P7~>mm+
} :9 ^* ^T
kMd.h[X~
private int size=0; k$^`{6l
`PH{syz
private int[] queue; VP]%Hni]
B^9j@3Ux
public int get() { czd~8WgOa
return queue[1]; Th%Sjgsn
} PwLZkr@4^
-3Vx76Y
public void remove() { 4{`{WI{
SortUtil.swap(queue,1,size--); U/NoP4~{
fixDown(1); c!9nnTap
} V "h +L7T
file://fixdown @;RXLq/8
private void fixDown(int k) { V~5jfcd
int j; CeC6hGR5
while ((j = k << 1) <= size) { ~/P[J
if (j < size %26amp;%26amp; queue[j] j++; vRO _Q?
if (queue[k]>queue[j]) file://不用交换 wAW5 Z0D
break; ?5 7Sk+
SortUtil.swap(queue,j,k); I2 P@L?h
k = j; D}X\Ca"h
} S^\Vgi(
} sLAQE64\"
private void fixUp(int k) { oILZgNe'
while (k > 1) { ]?[fsdAQW
int j = k >> 1; e^D]EA]%
if (queue[j]>queue[k]) LSr]S79N1
break; ~R92cH>L
SortUtil.swap(queue,j,k); 0:Ol7
k = j; 3'u-'
} [u*5z.^
} 6,{$J
ZzT9j~
} Y/zj[>
QMbOuw
} (JFWna0@
t{vJM!kdlQ
SortUtil： yaH Zt`Y
YcpoL@ab
package org.rut.util.algorithm; rh}J3S5vp
gSQJJxZ{?
import org.rut.util.algorithm.support.BubbleSort; @6T/Tdz
import org.rut.util.algorithm.support.HeapSort; g7W"
import org.rut.util.algorithm.support.ImprovedMergeSort; |8tilOqI
import org.rut.util.algorithm.support.ImprovedQuickSort; I&W=Q[m
import org.rut.util.algorithm.support.InsertSort; hx]?&zT@
import org.rut.util.algorithm.support.MergeSort; N[ Og43Y
import org.rut.util.algorithm.support.QuickSort; A2jUmK.&
import org.rut.util.algorithm.support.SelectionSort; q5)O%l!
import org.rut.util.algorithm.support.ShellSort; fmDCPkj
PxDh7{
/** ]3.;PWa:
* @author treeroot x+@rg];m
* @since 2006-2-2 N5b!.B x-w
* @version 1.0 Ej8^Zg
*/ iqQD{SRt{
public class SortUtil { v #j$;
public final static int INSERT = 1; &FN.:_E
public final static int BUBBLE = 2; ckE-",G
public final static int SELECTION = 3; 2a Q[zK
public final static int SHELL = 4; 8c^TT&
public final static int QUICK = 5; rCdu0 gYT
public final static int IMPROVED_QUICK = 6; b2&0Hx
public final static int MERGE = 7; vnZC,J `
public final static int IMPROVED_MERGE = 8; U|Ta4W`k\
public final static int HEAP = 9; [:SWi1cK2
<lE<f+
public static void sort(int[] data) { ]|PiF+
sort(data, IMPROVED_QUICK); _^%,x
} n]o<S+z
private static String[] name={ vT,AMja
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 3m!X/u
}; VQ9/Gxdeo
n[Y~]
private static Sort[] impl=new Sort[]{ 5uj?#)N
new InsertSort(), IKilr'
new BubbleSort(), ^yN&ZI3P&
new SelectionSort(), fHd#u%63K
new ShellSort(), 8>in_h9
new QuickSort(), JO6)-U$7UG
new ImprovedQuickSort(), -fW*vE:
new MergeSort(), &(l9?EVq1
new ImprovedMergeSort(), #fn)k1
new HeapSort() 6fEqqUeV
}; pYmk1!]/
%S^8c
public static String toString(int algorithm){ .;`AAH'k
return name[algorithm-1]; K} X&AJ5A
} _TQj~W<
}l} Bo.C
public static void sort(int[] data, int algorithm) { t)$:0
impl[algorithm-1].sort(data); "n5N[1bk
} Ig0VW)@
_H7x9 y=
public static interface Sort { #( 146
public void sort(int[] data); |~mOfuQb
} ra gXn
O`t&ldU
public static void swap(int[] data, int i, int j) { l L@XM2"
int temp = data; y(yHt=r
data = data[j]; `Cynj+PCe
data[j] = temp; $1L>)S
} 9w"4K.
} 1JG'%8}#8