[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; i77GE
} Q>qFM9Z
int i1=l; ~Cc.cce5
int i2=mid+1; % p?brc
for(int cur=l;cur<=r;cur++){ QIB>rQCceo
if(i1==mid+1) IgL_5A
data[cur]=temp[i2++]; xKOq[d/8
else if(i2>r) 7:NmCpgL!
data[cur]=temp[i1++]; RQW6N??C
else if(temp[i1] data[cur]=temp[i1++]; 'z=:[#b
else W2-=U@
data[cur]=temp[i2++]; +~nzii3
} _U|7'^|
} M!M!Ni
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} KyP)Qzp
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改进后的归并排序: kJs^ z
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package org.rut.util.algorithm.support; ]>i~6!@
jx_4B%kzq
import org.rut.util.algorithm.SortUtil; p3^jGj@
"()sb?&
/** }i!pL(8;
* @author treeroot nL]^$J$
* @since 2006-2-2 P5QQpY{<I
* @version 1.0 ']ood!
*/ Cup@TET35
public class ImprovedMergeSort implements SortUtil.Sort { t>UkE9=3\
o**yZ2
private static final int THRESHOLD = 10; %qsvtc`
4YU/uQm
/* sTHq&(hLUG
* (non-Javadoc) o=fgin/E\
* smAC,-6]~
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ^a9 oKI9n
*/ _'x8M
public void sort(int[] data) { R@T6U:1
int[] temp=new int[data.length]; 24\gbv<
mergeSort(data,temp,0,data.length-1); [IM%b~j(^
} "L&k)J
*j)M]
private void mergeSort(int[] data, int[] temp, int l, int r) { o5Rz%k#h
int i, j, k; 0>6DSQq~t(
int mid = (l + r) / 2; ^%oUmwP<$
if (l == r) b1^n KB
return; 8_\W/I!7b
if ((mid - l) >= THRESHOLD) MN;/*t
mergeSort(data, temp, l, mid); cJ}QXuuUv
else oholt/gb+0
insertSort(data, l, mid - l + 1); CidM(
if ((r - mid) > THRESHOLD) eo#^L}
mergeSort(data, temp, mid + 1, r); #$'"cfRxc
else j;P+_Hfe/E
insertSort(data, mid + 1, r - mid); s0LA^2U
\X}8q
for (i = l; i <= mid; i++) { S9Y[4*//
temp = data; YwT-T,oD
} 5a8>g [2U
for (j = 1; j <= r - mid; j++) { \Xg?Ug*9w
temp[r - j + 1] = data[j + mid]; )+Or
} wod/&!)]A
int a = temp[l]; =F%RLpNU4
int b = temp[r]; 2O""4_G
for (i = l, j = r, k = l; k <= r; k++) { M7y|EB))
if (a < b) { 1|y$~R.H
data[k] = temp[i++]; <ZPZk'53<f
a = temp; +S{
} else { "4}wnu6/
data[k] = temp[j--]; /nB'kg[h\
b = temp[j]; uOk%AL>
} )GB`*M[
} 1IA5.@G:
} e 3@x*XI
~\_T5/I%
/** .{rbw9
* @param data r:.uBc&_
* @param l \gKdDS
* @param i =q CF%~
*/ D,W\ gP/h%
private void insertSort(int[] data, int start, int len) { hFb fNB3
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); w{7ji}
} )@PnTpL*
} 0g(6r-2)7
} [Z}B"
} T[Q"}&bB
3B18dv,V
堆排序： Q9y*:
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package org.rut.util.algorithm.support; |+EKF.K
nmE5]Pcg
import org.rut.util.algorithm.SortUtil; 0^<,(]!
,w\ wQn>]K
/** 6Dzs?P
* @author treeroot LDX*<(
* @since 2006-2-2 af>3V(7
* @version 1.0 #vnT&FN0[
*/ {OxWcK\2@h
public class HeapSort implements SortUtil.Sort{ ^e9aD9
yz)ESQ~va
/* (non-Javadoc) Ee?;i<u
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) (:}<xxl
*/ zHFTCL>"
public void sort(int[] data) { Wvr+y!F
MaxHeap h=new MaxHeap(); $pu3Ig$^
h.init(data); 1mUTtYU
for(int i=0;i h.remove(); i,OKfXp
System.arraycopy(h.queue,1,data,0,data.length); U)~#g'6:8
} kEAhTh&g*
zA{8C];~
private static class MaxHeap{ 3q~Fl=|.o
@InJ_9E
void init(int[] data){ bXl8v
this.queue=new int[data.length+1]; lP0k:
for(int i=0;i queue[++size]=data; iSd?N}2,I
fixUp(size); ,C!n}+27
} kMS5h~D[
} 0eA5zFU7
|!b9b(_j9
private int size=0; {})y^L
ZlM_m >,o
private int[] queue; UX}*X`{
3}4#I_<$F@
public int get() { @&:VKpu\
return queue[1]; uX0 Bp8P
} d^SE)/j
Qp69Sk@H{
public void remove() { Y\8+}g;KR
SortUtil.swap(queue,1,size--); \dNhzd#
fixDown(1); "t+r+ipf])
} N9*UMVU
file://fixdown zlMlMyG4
private void fixDown(int k) { wb+<a
int j; W?PWJkIw
while ((j = k << 1) <= size) { hT=f;6$
if (j < size %26amp;%26amp; queue[j] j++; *f*f&l%
if (queue[k]>queue[j]) file://不用交换 uHrb:X!q
break; @U7Dunu*f
SortUtil.swap(queue,j,k); 51/sTx<Z}
k = j; Vj7Hgc-,
} nt`<y0ta
} |8;? *s`H
private void fixUp(int k) { i@{*O@m
while (k > 1) { >nNl^ yqW
int j = k >> 1; T{;=#rG<
if (queue[j]>queue[k]) =+(Q.LmhC
break; KL~AzLI
SortUtil.swap(queue,j,k); X!7Xg
k = j; }z{wQ\
} '_E c_F
} q(1r<2
_=T]PSauI
} + o{*r#
f-]><z
} %(NN*o9"q
dk4D+*R
SortUtil： UFk!dK+
pg5&=
package org.rut.util.algorithm; 7uA\&/ ,
'{W3j^m7
import org.rut.util.algorithm.support.BubbleSort; KT%{G8Y@M
import org.rut.util.algorithm.support.HeapSort; KE#$+,?
import org.rut.util.algorithm.support.ImprovedMergeSort; J;HkTT
import org.rut.util.algorithm.support.ImprovedQuickSort; |P~q/Wff
import org.rut.util.algorithm.support.InsertSort; Nc"NObe
import org.rut.util.algorithm.support.MergeSort; X=#It&m%s
import org.rut.util.algorithm.support.QuickSort; N=<=dp(
import org.rut.util.algorithm.support.SelectionSort; w?/f Zx
import org.rut.util.algorithm.support.ShellSort; omT(3)TP
ze$Y=<S
/** e9}8RHy1$
* @author treeroot W%H]Uyt
* @since 2006-2-2 iGQ n/Xdo
* @version 1.0 BWohMT
*/ (6o:4|xl0
public class SortUtil { i)8gCDc
public final static int INSERT = 1; #\0TxG5'QA
public final static int BUBBLE = 2; d{l{P]nr
public final static int SELECTION = 3; Jbkt'Z(&J
public final static int SHELL = 4; "YD.=s
public final static int QUICK = 5; 6,3}/hgWJ$
public final static int IMPROVED_QUICK = 6; x36NL^
public final static int MERGE = 7; fYs?D+U;PF
public final static int IMPROVED_MERGE = 8; Yim#Pq&_
public final static int HEAP = 9; "p`o]$Wv
`+Xe'ey
public static void sort(int[] data) { c-|kv[\a
sort(data, IMPROVED_QUICK); DUQ9AT#3
} |thad!?
private static String[] name={ 0ovZ&l
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 67fIIXk&
}; 2$
-2z,cj&E{
private static Sort[] impl=new Sort[]{ CBIT`k.+
new InsertSort(), -@#Pc#
new BubbleSort(), !&\meS{
new SelectionSort(), a.1`\$]d
new ShellSort(), <(Tiazg
new QuickSort(), uGM>C"
new ImprovedQuickSort(), K^8@'#S
new MergeSort(), mUiOD$rO
new ImprovedMergeSort(), 8Y7 @D$=w
new HeapSort() srhFEmgN7)
}; -S7RRh'p
` -yhl3si
public static String toString(int algorithm){ cJ2y)`
return name[algorithm-1]; c'xUJhEL
} QW,cn7
T4vogoy
public static void sort(int[] data, int algorithm) { VmMh+)UZ
impl[algorithm-1].sort(data); htQ;m)>J:
} =P)"NP7f'
]|t9B/()i
public static interface Sort { /^~p~HKtx
public void sort(int[] data); -S`TEX
} E}Ljo
\?r$&K]4
public static void swap(int[] data, int i, int j) { a4:`2
int temp = data; &bn*p.=G
data = data[j]; QaIi.*tic
data[j] = temp; >Sh0dFqeT
} xP42xv9U
} 2NyUmJ42