[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-G b"hr
} aQmfrx
int i1=l; u&SZlkf6%
int i2=mid+1; k2OM="Ei}
for(int cur=l;cur<=r;cur++){ y#bK,}
if(i1==mid+1) jvO3_Zt9
data[cur]=temp[i2++]; ]-KV0H
else if(i2>r) 0IFlEe[>#
data[cur]=temp[i1++]; sJ7sjrEp1
else if(temp[i1] data[cur]=temp[i1++]; </yo9.
else h^d\xn9GT#
data[cur]=temp[i2++]; ;>C9@S+
} P/`m3aSzX.
} "!a`ygqpT
+@>:%yX
} Tc,$TCF
!a4cjc(
改进后的归并排序: !u%9;>T7
Oc^m_U8>^
package org.rut.util.algorithm.support; 2C{/`N
7(@(Hm
import org.rut.util.algorithm.SortUtil; F8 ?uQP8
aG Ef#A
/** 3d@ef|
* @author treeroot hA5,w_G/
* @since 2006-2-2 w^U}|h"
* @version 1.0 }\4p3RQrz
*/ ?k::tNv0
public class ImprovedMergeSort implements SortUtil.Sort { e2Ww0IK!E
(s Jq;Z
private static final int THRESHOLD = 10; k)i"tpw
hU)'OKe
/* X/wmKi
* (non-Javadoc) C{)HlOW
* FbBX}n
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) lY->ucS %P
*/ 1XGG.+D
public void sort(int[] data) { r!~(R+,c
int[] temp=new int[data.length]; rV~T>x
mergeSort(data,temp,0,data.length-1); `11#J;[@G
} rd|crD3
+Tp%5+E
private void mergeSort(int[] data, int[] temp, int l, int r) { k}-]W@UCa?
int i, j, k; ]xI?,('_m
int mid = (l + r) / 2; PC[cHgSYU
if (l == r) gjQ=8&i
return; vi<X3G6Xh
if ((mid - l) >= THRESHOLD) }/49T
mergeSort(data, temp, l, mid); ?n&$m
else _l<|1nH
insertSort(data, l, mid - l + 1); QS5H>5M)
if ((r - mid) > THRESHOLD) }ymc5-
mergeSort(data, temp, mid + 1, r); ;fj9n-
else rWqkdi1
insertSort(data, mid + 1, r - mid); %P(;8sS
Kc-Y
for (i = l; i <= mid; i++) { Gxo# !
temp = data; u2\+?`Ox
} s><IykIi
for (j = 1; j <= r - mid; j++) { ?LR"hZ>
temp[r - j + 1] = data[j + mid]; 61L7 -~
} Ogd8!'\
int a = temp[l]; ;C+cE#
int b = temp[r]; e/ WBgiLw
for (i = l, j = r, k = l; k <= r; k++) { U|9U(il
if (a < b) { [4ee <J
data[k] = temp[i++]; T^N L:78
a = temp; t18UDR{
} else { v&e-`.xR
data[k] = temp[j--]; L)1C'8).
b = temp[j]; kAY@^vi
} Z6NJ)XQy6F
} K q/~T7Ru
} Uld_X\;Q4
9e-*JYF]C
/** u>81dO]H
* @param data xJN|w\&
* @param l 'N*!>mZ<
* @param i jk K#e$7
*/ cJSVT8
private void insertSort(int[] data, int start, int len) { g;(_Y1YQ
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); FT<H]Nf
} (LRNU)vD7$
} BSOjyy1f
} ]c5DOv&
} B'<!k7Ewy
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堆排序： ^v ]UcnB0
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package org.rut.util.algorithm.support; n}=rj7
tF<^9stM
import org.rut.util.algorithm.SortUtil; #"hJpyW 4V
7[4_+Q:}
/** ^GE^Q\&D&
* @author treeroot =d}gv6v2S
* @since 2006-2-2 *Yj~]E0`1
* @version 1.0 +:fqL
*/ ESn6D@"
public class HeapSort implements SortUtil.Sort{ p(~Y" H
yI3Q|731)
/* (non-Javadoc) JL?Cnk$!
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 45?*:)l:
*/ ||yXp2
public void sort(int[] data) { R:]/{b4Uq
MaxHeap h=new MaxHeap(); *Kp}B}}J
h.init(data); 1d/NZJ9
for(int i=0;i h.remove(); Po'-z<}wS
System.arraycopy(h.queue,1,data,0,data.length); +ylxezc
} xOwNCh
tCuN?_UG
private static class MaxHeap{ 3w t:5 Im
umZlIH[7
void init(int[] data){ P4hZB_.=
this.queue=new int[data.length+1]; fL(':W&n-
for(int i=0;i queue[++size]=data; 5ze`IY
fixUp(size); I/mvQxp
} !'Pk jP
} VV?]U$
Y0@'za^y
private int size=0; "kcpA#uD|
#.<*; rB
private int[] queue; o G(0i
w9G_>+?E
public int get() { f0/jwfL
return queue[1]; JX2mTQ
} Fl B, (Cm
;3 G~["DA
public void remove() { $?[1#%
SortUtil.swap(queue,1,size--); _=o1?R
fixDown(1); "L9C
} N|UBaPS|o
file://fixdown jN31\)/i
private void fixDown(int k) { =''mpIg(
int j; nu#aa#ex>
while ((j = k << 1) <= size) { <P+G7!KZ&
if (j < size %26amp;%26amp; queue[j] j++; 0\?_lT2
if (queue[k]>queue[j]) file://不用交换 Aqa6R+c
break; 'q{PtYr
SortUtil.swap(queue,j,k); H(X+.R,Thp
k = j; /1IvLdPIu
} 6.7`0v?,n
} vh<]aiY
private void fixUp(int k) { //#xK D
while (k > 1) { fKPiRlLS
int j = k >> 1; JVD@I{
if (queue[j]>queue[k]) q,<n,0)K
break; kb/|;!
SortUtil.swap(queue,j,k); pi^^L@@d
k = j; (! xg$Kz@
} )$ ofl%+
} aEcktg6h
i!CKA}",
} mgJShn8]
B0-4ZT
} ."~7 \E> t
lAdOC5+JX
SortUtil： 80{#bb
RnMBGxa
package org.rut.util.algorithm; @m+pr\h(
GCcwEl!K^
import org.rut.util.algorithm.support.BubbleSort; e#l*/G*,
import org.rut.util.algorithm.support.HeapSort; g0^~J2sDd
import org.rut.util.algorithm.support.ImprovedMergeSort; *\=2KIF'
import org.rut.util.algorithm.support.ImprovedQuickSort; mtSNl|O&{
import org.rut.util.algorithm.support.InsertSort; Y&?|k'7
import org.rut.util.algorithm.support.MergeSort; UI|v/(_^F
import org.rut.util.algorithm.support.QuickSort; 03X<x|
import org.rut.util.algorithm.support.SelectionSort; "\VW.S
import org.rut.util.algorithm.support.ShellSort; GOv92$e
y+K7WUwhq
/** AzHIp^
* @author treeroot P`\m9"7
* @since 2006-2-2 S/@dkHI'
* @version 1.0 - XE79 fQ
*/ /2g)Z!&+L
public class SortUtil { %k/ k]:s
public final static int INSERT = 1; iYO wB'z
public final static int BUBBLE = 2; uvu**s
public final static int SELECTION = 3; '#cT4_D^lI
public final static int SHELL = 4; uznoyj6g
public final static int QUICK = 5; .jU|gf:x
public final static int IMPROVED_QUICK = 6; pr0@sri@
public final static int MERGE = 7; c[wQJc
public final static int IMPROVED_MERGE = 8; OoAr%
public final static int HEAP = 9; JVJ1Ay/be
j33P~H~
public static void sort(int[] data) { *=-__|t
sort(data, IMPROVED_QUICK); WmT}t
} $$2S*qY
private static String[] name={ At`1)
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" % j[O&[s}
}; hRuo,FS#:
!.;xt L
private static Sort[] impl=new Sort[]{ AmT|%j&3
new InsertSort(), ~pd1)
new BubbleSort(), 4 |:Q1
new SelectionSort(), Vu|Br
new ShellSort(), -V;0_Nx7p
new QuickSort(), )8 "EI-/.
new ImprovedQuickSort(), O84v*=uA
new MergeSort(), !1a|5 xrn
new ImprovedMergeSort(), EzD -1sJ
new HeapSort() >gX0Ij#G
}; nZ`2Z7!
[a>JG8[,t
public static String toString(int algorithm){ }}sRTW
return name[algorithm-1]; !7IT~pO`
} }5o~R~H
U:mq7Rd8
public static void sort(int[] data, int algorithm) { (n":]8}
impl[algorithm-1].sort(data); WuP([8
} X/`#5<x
:/yr(V{
public static interface Sort { [6,]9|~
public void sort(int[] data); \p>]G[g
} Y^c,mK^
X]JpS
public static void swap(int[] data, int i, int j) { C0t+Q
int temp = data; ,E*a$cCw
data = data[j]; ?RRSrr1
data[j] = temp; e6{[o@aM{
} \J,- <wF
} xY\*L:TwW