[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; LkJq Bg
} ZiR}S
int i1=l; h:pgN,W}
int i2=mid+1; l)$mpMgAD
for(int cur=l;cur<=r;cur++){ my sXgS&S
if(i1==mid+1) 'n7|fjX?Y
data[cur]=temp[i2++]; rrU(>jA!
else if(i2>r) Kc]cJ`P4.
data[cur]=temp[i1++]; ^iEf"r
else if(temp[i1] data[cur]=temp[i1++]; ^r}Uu~A>
else DH\Ox>b=
data[cur]=temp[i2++]; %t_'rv
} qsp3G7\'=
} [UkcG9
:c]y/lQmV
} ,'c%S|]U7
e[x,@P`
改进后的归并排序: eW.qMx#:od
gs1
package org.rut.util.algorithm.support; s8(Z&pQ
]kNxytH\o
import org.rut.util.algorithm.SortUtil; .nIGs'P
xy>$^/[$
/** fQ~~%#z1
* @author treeroot lg-`zV3
* @since 2006-2-2 TCzz]?G]la
* @version 1.0 d3EN0e+^
*/ im<!JMI
public class ImprovedMergeSort implements SortUtil.Sort { mu0L_u(P
bL<H$DB6
private static final int THRESHOLD = 10; ShRMzU
7oLlRU
/* 7]u_
* (non-Javadoc) 2O(k@M5E?
* 1;./e&%%
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) dT1UYG}>j
*/ \W_ Dz*N
public void sort(int[] data) { bg3kGt0
int[] temp=new int[data.length]; m?Jnb\0
mergeSort(data,temp,0,data.length-1); B7A.~'=
} $m>( kd1
jMWTNZ
private void mergeSort(int[] data, int[] temp, int l, int r) { lKQjG+YF
int i, j, k; %\v
int mid = (l + r) / 2; 2hntQ1[
if (l == r) ]mJ9CP8P1c
return; fX:G;vYn
if ((mid - l) >= THRESHOLD) z4.|N
mergeSort(data, temp, l, mid); tre`iCH~
else [PrJf"Z "
insertSort(data, l, mid - l + 1); kVWrZ>McK
if ((r - mid) > THRESHOLD) /jaO\t'q
mergeSort(data, temp, mid + 1, r); zxv y&
else fm%4ab30T
insertSort(data, mid + 1, r - mid); WFug-#;e
RionKiN
for (i = l; i <= mid; i++) { wc6#C>=F
temp = data; <1sUK4nQ,
} AnsJ3C
for (j = 1; j <= r - mid; j++) { >&Ye(3w&
temp[r - j + 1] = data[j + mid]; ' z^v}~
} MmfshnTN
int a = temp[l]; ]~m=b`o
int b = temp[r]; EA:_PBZ
for (i = l, j = r, k = l; k <= r; k++) { bnp:J|(ld
if (a < b) { ^SUo-N''
data[k] = temp[i++]; _}`y3"CD7
a = temp; GO#eI]>/r
} else { wGz_IL.D
data[k] = temp[j--]; R;/LB^X]
b = temp[j]; F>u/Lh!
} H/#WpRg
} f`J[u!Ja
} =:RNpi,
)6he;+
/** ijNI6_eU
* @param data [/cJc%{N
* @param l .fzns20u
* @param i n*=Tm KQ
*/ <dY{@Cgw=
private void insertSort(int[] data, int start, int len) { \y/0)NL\
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 61K:SXj
} xiQd[[(sM
} #4sSt-s&
} SMm$4h R
} `? f sU
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堆排序： KU0;}GSNX}
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package org.rut.util.algorithm.support; CYk"
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import org.rut.util.algorithm.SortUtil; =~j S
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/** Bk4|ik}
* @author treeroot yH@2nAn
* @since 2006-2-2 7!, p,|K
* @version 1.0 \o!B:Vb<
*/ ^t)alNGos
public class HeapSort implements SortUtil.Sort{ A `=.F
U| 1&=8l
/* (non-Javadoc) ~M J3-<I
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) K}Pi"Le@W
*/ oO,"B8a
public void sort(int[] data) { o,y{fv:ki
MaxHeap h=new MaxHeap(); ~D Ta%J
h.init(data); a`QKNrA2
for(int i=0;i h.remove(); \M-$|04Qt
System.arraycopy(h.queue,1,data,0,data.length); ,Z]4`9c
} xXc3#n
d[Rs
private static class MaxHeap{ so\8.(7n
gNo}\ lm4V
void init(int[] data){ 'ZQR@~G
this.queue=new int[data.length+1]; p[gq^5WuC
for(int i=0;i queue[++size]=data; _S#3!Wx
fixUp(size); EY 9N{
} SQVyCxcX_
} E./Gt.Na
|zSoA=7?
private int size=0; C")NNs=
?f[U8S}
private int[] queue; qc`UDD5
}>u<,
public int get() { f0lK,U@P
return queue[1]; 'uA$$~1
} n*fsdo~
j*)K> \
public void remove() { q'awV5y
SortUtil.swap(queue,1,size--); |G]M"3^
fixDown(1); e!~x-P5M`
} -J=N
file://fixdown !NFP=m1
private void fixDown(int k) { @=1kr ^i
int j; 'xY@I`x
while ((j = k << 1) <= size) { VWa;;?IK
if (j < size %26amp;%26amp; queue[j] j++; X>y6-%@
if (queue[k]>queue[j]) file://不用交换 kUG3_ *1 .
break; ^aG=vXK`b
SortUtil.swap(queue,j,k); i^'Uod0d.
k = j; UN*XLHio
} ?rn#S8nNx<
} -=D6[DjU<
private void fixUp(int k) { \;smH;m
while (k > 1) { v(tr:[V
int j = k >> 1; >Kc>=^=5
if (queue[j]>queue[k]) RI%ZT
break; $w$4RQk3n
SortUtil.swap(queue,j,k); ~?)ST?&
k = j; 4h[^!up.7
} o!+jPwEU
} p$cSES>r:
{r!X W
} M6b; DQ
Ag`:!*
} j.@TPf*
to
SortUtil： c*g(R.!
!Z6GID})p
package org.rut.util.algorithm; jci'q=Vpu
'nM)=
import org.rut.util.algorithm.support.BubbleSort; g2<xr;<t^
import org.rut.util.algorithm.support.HeapSort; wb }W;C@
import org.rut.util.algorithm.support.ImprovedMergeSort; *?`:=
import org.rut.util.algorithm.support.ImprovedQuickSort; T?+xx^wYk
import org.rut.util.algorithm.support.InsertSort; 2Xm\;7
import org.rut.util.algorithm.support.MergeSort; m{bw(+r
import org.rut.util.algorithm.support.QuickSort; `"E|
import org.rut.util.algorithm.support.SelectionSort; 0r+%5}|-K
import org.rut.util.algorithm.support.ShellSort; J8x>vC
/L1qdkG
/** ^xGdRaU#
* @author treeroot ,&sBa{0
* @since 2006-2-2 "yI)F~A
* @version 1.0 m*BtD-{
*/ ,z?Re)qm
public class SortUtil { /EOtK|E
public final static int INSERT = 1; $e! i4pM
public final static int BUBBLE = 2; \7}X^]UVx
public final static int SELECTION = 3; LV&tu7c
public final static int SHELL = 4; 10JxfDceD
public final static int QUICK = 5; PT|W{RlNl
public final static int IMPROVED_QUICK = 6; PF1m :Iz`d
public final static int MERGE = 7; m#'2 3
public final static int IMPROVED_MERGE = 8; > @ulvHL
public final static int HEAP = 9; 'W~O?
3`&2-
public static void sort(int[] data) { R0M(e@H~
sort(data, IMPROVED_QUICK); 1e;^MzB"
} ~h;c3#wuc
private static String[] name={ =S-'*F
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" EY(@R2~#J
}; i%M2(8&^Q
WZ'3
private static Sort[] impl=new Sort[]{ %/H
new InsertSort(), 4 ~17s`+
new BubbleSort(), aT#R#7<Eg
new SelectionSort(), H;<hmbN?d
new ShellSort(), oSt-w{!
new QuickSort(), 8KD7t&H
new ImprovedQuickSort(), O1@xF9<
new MergeSort(), -O_5OT4
new ImprovedMergeSort(), S5'BXE,
new HeapSort() }`yIO"{8n
}; [t /hjm"$
~?dPF;.6_
public static String toString(int algorithm){ xv9Z~JwH
return name[algorithm-1]; 9q;\;-
} j]6j!.1
5-}4jwk
public static void sort(int[] data, int algorithm) { E'e#axF;
impl[algorithm-1].sort(data); C}+w<
} UR?[ba_h
)[6H!y5
public static interface Sort { `7Ni bZX0
public void sort(int[] data); lC.Yu$O5
} &?*M+q34
q[l},nw
public static void swap(int[] data, int i, int j) { k:<yy^g$X
int temp = data; {y'c*NS
data = data[j]; b IcLMG s
data[j] = temp; A[Juv]X
} Ud:v3"1
} rZ1${/6