[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; %SXqJW^:
} r; !us~
int i1=l; ElxbHQj6
int i2=mid+1; 8~&v\GDkF
for(int cur=l;cur<=r;cur++){ Xw)+5+t"{
if(i1==mid+1) s]OXB {M
data[cur]=temp[i2++]; 0@;E8^pa
else if(i2>r) IRB;Q(Z
data[cur]=temp[i1++]; `0N/ /Q
else if(temp[i1] data[cur]=temp[i1++]; \g/E4U.+
else :;QLoZh^
data[cur]=temp[i2++]; [MG:Ym).2`
} >TgO|mq
} P) #rvTDRw
p*A//^wQ
} F{Hy@7
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改进后的归并排序: 0c)19Ig
YQJ_t@0C
package org.rut.util.algorithm.support; []NAV
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import org.rut.util.algorithm.SortUtil; ~Tolz H!
;$]R#1i44
/** on|>"F`pb
* @author treeroot r@aFB@
* @since 2006-2-2 R?R6|4
* @version 1.0 kJ >B)
*/ gV0ZZ"M
public class ImprovedMergeSort implements SortUtil.Sort { +dRTHz
NDi@x"];
private static final int THRESHOLD = 10; S5vJC-"
mc$dR, H0
/* Sw~<W%! ?
* (non-Javadoc) h 9/68Gc?6
* yL1\V7GI{[
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) O;r8l+
*/ 5k@k
public void sort(int[] data) { F7df
int[] temp=new int[data.length]; 0@KBQv"v
mergeSort(data,temp,0,data.length-1); aqlYB7
} LT!4pD:a
O<5bsKw'r
private void mergeSort(int[] data, int[] temp, int l, int r) { Cv3H%g+as
int i, j, k; SU^/qF%8
int mid = (l + r) / 2; 4Y'qoM;
if (l == r) @: NrC76
return; aOOY_S E
if ((mid - l) >= THRESHOLD) rB\UNXy
mergeSort(data, temp, l, mid); @eul~%B{X
else . 2WZb_B
insertSort(data, l, mid - l + 1); 3e"G.0vJ
if ((r - mid) > THRESHOLD) f7L|Jc
mergeSort(data, temp, mid + 1, r); Xc.~6nYp
else ^,50]uX_
insertSort(data, mid + 1, r - mid); @/~41\=e
rYT3oqpfT
for (i = l; i <= mid; i++) { ]yyfE7{q
temp = data; Y,9("'bo
} G{:L^2>
for (j = 1; j <= r - mid; j++) { PGJ?=qXr#
temp[r - j + 1] = data[j + mid]; cCwT0O#d
} ,}[,]-nVx
int a = temp[l]; ^I^k4iw4
int b = temp[r]; !#3R<bW`R8
for (i = l, j = r, k = l; k <= r; k++) { *+iWB_
if (a < b) { [@(zGb8
data[k] = temp[i++]; I".r`$XZ
a = temp; (mycUU%
} else { E:%%Dm
data[k] = temp[j--]; 5s0H4?S
b = temp[j]; I6UZ_H'E
} $0WAhq
} -y~JNDS1]
} n1v%S"^
3Z`oI#-x
/** 4&?%"2
* @param data 6(wpf^br2
* @param l 7eY*Y"GX
* @param i y- g5`@
*/ \KG{ 11
private void insertSort(int[] data, int start, int len) { p%n}a%%I
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); fO9e ;
} O,7P6
} k38Ds_sW6d
} LJT+tb?K
} N3E=t#n
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堆排序： _m@QeO'yh
DS^PHk39
package org.rut.util.algorithm.support; hD;[}8qN{
|d8/ZD
import org.rut.util.algorithm.SortUtil; 2/I^:*e
Pb!kl #
/** 98A ;R
* @author treeroot =3sBWDB[
* @since 2006-2-2 &K}!R$[,:P
* @version 1.0 2mI=V.X[&
*/ 9c<lFZb;
public class HeapSort implements SortUtil.Sort{ z"R-Sme
q[r|p"TGov
/* (non-Javadoc) ^>[Z~G($
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) "=HCP,
*/ :H6Ipa
public void sort(int[] data) { <V9L AWeS
MaxHeap h=new MaxHeap(); 9Y~A2C
h.init(data); <s $~h
for(int i=0;i h.remove(); Riw#+#r]/
System.arraycopy(h.queue,1,data,0,data.length); o XA*K.X<
} U$qSMkj6RK
7kHEY5s "
private static class MaxHeap{ B;L~hM
Qb6s]QZEV
void init(int[] data){ Hw_(Af?C
this.queue=new int[data.length+1]; Wl}d6ZTm
for(int i=0;i queue[++size]=data; ']>@vo4kK{
fixUp(size); JhIgqW2
} S's\M5
} 7\eN8+
-k=02?0p+
private int size=0; we!}"'E;
R9~%ORI#;
private int[] queue; ?HttqK)
!XQG1!|ww
public int get() { 2BEF8o]Np
return queue[1]; 90&ld:97
} In5'(UHW:
eXUXoK=T
public void remove() { : >4{m)
SortUtil.swap(queue,1,size--); byoDGUv
fixDown(1); [P407Sa"
} 6I"Q9(
file://fixdown |lrLTI^a
private void fixDown(int k) { Av]<[ F/
int j; 0 @~[SXR
while ((j = k << 1) <= size) { j!xt&t4D
if (j < size %26amp;%26amp; queue[j] j++; H0_hQ:K
if (queue[k]>queue[j]) file://不用交换 ?dY}xE
break; QD-#sU]
SortUtil.swap(queue,j,k); ojni+}>_
k = j; H[BY(a@c
} ,~p'p)
} |/5j0
private void fixUp(int k) { f =B)jYI
while (k > 1) { |]w0ytL>(2
int j = k >> 1; {=VauF
if (queue[j]>queue[k]) :%~+&qS
break; -$!`8[fM
SortUtil.swap(queue,j,k); ayTEQS
k = j; R&PQU/t)
} 4Bsx[~ u&
} 8xW_N"P.>
icOh/G=N;
} =Wn11JGh
be}^}w=
} WgF Xv@Jjt
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SortUtil： u|z B\zd
$fR[zBxA
package org.rut.util.algorithm; L&H4fy!>
|f#~#Y2v
import org.rut.util.algorithm.support.BubbleSort; CXwDG_e
import org.rut.util.algorithm.support.HeapSort; *W~+Nho.A
import org.rut.util.algorithm.support.ImprovedMergeSort; ]#z^[XG
import org.rut.util.algorithm.support.ImprovedQuickSort; s~W:N.}*
import org.rut.util.algorithm.support.InsertSort; CA, &R<]
import org.rut.util.algorithm.support.MergeSort; pn<M`,F~q
import org.rut.util.algorithm.support.QuickSort; x >hnH{~w
import org.rut.util.algorithm.support.SelectionSort; ep* (
import org.rut.util.algorithm.support.ShellSort; n.Iu|,?q
icLf;@
/** c;C:$B7
* @author treeroot )/A IfH
* @since 2006-2-2 ),1MR=
* @version 1.0 7+QD=j-
*/ dOh`F~ Y)e
public class SortUtil { EW7heIT$
public final static int INSERT = 1; tQ=M=BPZ
public final static int BUBBLE = 2; rf?Q# KM\W
public final static int SELECTION = 3; f^\qDvPur
public final static int SHELL = 4; Q5b~5a
public final static int QUICK = 5; F?TxViL
public final static int IMPROVED_QUICK = 6; Z6#}6Y{
public final static int MERGE = 7; K6d9[;F
public final static int IMPROVED_MERGE = 8; (P&~PJH
public final static int HEAP = 9; -*t4(wT|j
794V(;sW,
public static void sort(int[] data) { l( /yaZ`
sort(data, IMPROVED_QUICK); 1$vsw
} xcz[w}{eEq
private static String[] name={ Op%}.9ed
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" H*BzwbM?
}; Uv?s<
Q$r1beA
private static Sort[] impl=new Sort[]{ Vw0cf;
new InsertSort(), u?6L.^Op
new BubbleSort(), gx~79;6
new SelectionSort(), P0WI QG+
new ShellSort(), # Un>g4>Rh
new QuickSort(), :I*G tq
new ImprovedQuickSort(), 7)aitDD
new MergeSort(), X;25G
new ImprovedMergeSort(), 4 qMO@E_
new HeapSort() IMjz#|c
}; #Ux*":
GAG=4g
public static String toString(int algorithm){ QwPLy O
return name[algorithm-1]; SUwSZ@l^|
} (:v|(Gn/
Qvo(2(
public static void sort(int[] data, int algorithm) { O&h3=?O&B
impl[algorithm-1].sort(data); 0*0]RC5?
} c@H:?s!0R
G Xx7/X
public static interface Sort { )* 5R/oy,
public void sort(int[] data); g#b[-)Qx
} r:Uqtqxh
/;>U0~K
public static void swap(int[] data, int i, int j) { "|<6bA
int temp = data; X-,scm
data = data[j]; 3{OY&
data[j] = temp; xdw"JS}
} k=">2!O/
} 6M^P]l