[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; _mc-CZ
} F;sZc,Y,^
int i1=l; 85Red~-M
int i2=mid+1; *Sp_s_tS
for(int cur=l;cur<=r;cur++){ /Xk-xg+U
if(i1==mid+1) dh S7}n
data[cur]=temp[i2++]; z^^)n
else if(i2>r) 1V:I}~\
data[cur]=temp[i1++]; H?_>wQj&
else if(temp[i1] data[cur]=temp[i1++]; d=d*:<Zx
else y$[:Kh,
data[cur]=temp[i2++]; "kd)dy95H
} x>$e*
} 2xK v;
Ra/Pk G-7
} ???`BF[|
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改进后的归并排序: _9:r4|S
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package org.rut.util.algorithm.support; K*S3{s%UR
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import org.rut.util.algorithm.SortUtil; {2F@OfuCF
75^AO>gt
/** zd|n!3;
* @author treeroot =~_
* @since 2006-2-2 LS]0p#
* @version 1.0 Q>(a JF
*/ ( 4(,"
public class ImprovedMergeSort implements SortUtil.Sort { );;UA6CD
/]oQqZHv
private static final int THRESHOLD = 10; %X|u({(zb
c{ ([U
/* }`.d4mm
* (non-Javadoc) %+^Qs\j
* i&YWutG
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) LhRd0
*/ 2Gh&h(
public void sort(int[] data) { s }Ql9
int[] temp=new int[data.length]; LU/;`In
mergeSort(data,temp,0,data.length-1); l];/,J^
} >L')0<!&
_&%FGcAS
private void mergeSort(int[] data, int[] temp, int l, int r) { )2a)$qx;
int i, j, k; ALj~e#{;z
int mid = (l + r) / 2; m!5Edo-;<
if (l == r) .cm2L,1h
return; z]7/Gc,j
if ((mid - l) >= THRESHOLD) hd6O+i Y4
mergeSort(data, temp, l, mid); dIfy!B"
else 2+_a<5l~
insertSort(data, l, mid - l + 1); 1ktxG1"1
if ((r - mid) > THRESHOLD) XO+rg&Pu
mergeSort(data, temp, mid + 1, r); F$bV}>-1k
else `Qjs{H
insertSort(data, mid + 1, r - mid); IVY)pS"pR"
$,yAOaa
for (i = l; i <= mid; i++) { P?S]Q19Q4
temp = data; hHHQmK<r
} 0(*L)s,5
for (j = 1; j <= r - mid; j++) { |c^?tR<
temp[r - j + 1] = data[j + mid]; uFhaN\S
} 7i!VgV
int a = temp[l]; <z\`Ma
int b = temp[r]; J\P6
for (i = l, j = r, k = l; k <= r; k++) { 'ZB^=T
if (a < b) { -Caj>K
data[k] = temp[i++]; BlQX$s]
a = temp; SnR2o3r-Of
} else { }opw_h+/F
data[k] = temp[j--]; 0EF~Ouef
b = temp[j]; 0Ni{UV? k
} +FAj30
} H>A6VDu
} #=={h?UDT
1Dl6T\20
/** r*]pL<
* @param data 6y~F'/ww
* @param l nQoQNB
* @param i N@L{9ak1
*/ U3N9O.VC
private void insertSort(int[] data, int start, int len) { HA*L*:0
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); P6R_W
} L-!1ybB^
} [ r8 ZAS
} wV"`Du7E;
} OU"%,&J
|PlNVd2
堆排序： VOLj#H
-X~mW
package org.rut.util.algorithm.support; u;gO+)wqv
qQi\/~Y[:
import org.rut.util.algorithm.SortUtil; (rd [tc
/rnI"ze`
/** yB2h/~+
* @author treeroot > 'hM"4f
* @since 2006-2-2 !6T"J!F#
* @version 1.0 B+j]C$8}
*/ XS[L-NHG
public class HeapSort implements SortUtil.Sort{ *L$2M?xkY
k=hWYe$iAz
/* (non-Javadoc) DzQBWY] )
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) :Ko6.|
*/ -juG[zn
public void sort(int[] data) { RhH1nf2UR
MaxHeap h=new MaxHeap(); {K]5[bMT
h.init(data); ~0a5
for(int i=0;i h.remove(); *[3xc*5F/A
System.arraycopy(h.queue,1,data,0,data.length); hPDKxYD]f
} l9Ir@.m
&)%+DUV|
private static class MaxHeap{ yZ|"qP1
8w&-O~M
void init(int[] data){ /i'078F
this.queue=new int[data.length+1]; qW0:q.
for(int i=0;i queue[++size]=data; /Vn>(;lo
fixUp(size); z%%O-1
} " B#|C'
} f'^uuO#x
<U@N^#
private int size=0; wZiUzS;v
L>1hiD&
private int[] queue; B7C3r9wj
(+> 2&@@<
public int get() { 1cLtTE
return queue[1]; QF#w$%7
} Az`Aa0h]7
;sZG=y@
public void remove() { 5ilGWkb`'X
SortUtil.swap(queue,1,size--); Wwq:\C
fixDown(1); hmO2s/~
} 9-KhJq%
file://fixdown Fb5U@X/vE
private void fixDown(int k) { Y'iX
int j; {ez$kz
while ((j = k << 1) <= size) { K4c:k; V
if (j < size %26amp;%26amp; queue[j] j++; K,E/.Qe\C
if (queue[k]>queue[j]) file://不用交换 zX>W 8P
break; VY0.]t
SortUtil.swap(queue,j,k); 9y7N}T6
k = j; ~VGnE:
} yB b%#GW
} H U|.5tP
private void fixUp(int k) { 3S0.sU~_U
while (k > 1) { M!UTqf7XL
int j = k >> 1; (#Y~z',I
if (queue[j]>queue[k]) [XfR`@
break; -+#%]P8l
SortUtil.swap(queue,j,k); @I_cwUO
k = j; )r2Y@+.FN
} N9e'jM>Oos
} {VgE07r
M tN>5k c
} L:R4&|E/t
Yh":>~k?SY
} b$G{^
Hq3|>OqC2Q
SortUtil： "HMEoZ
+HK4sA2;
package org.rut.util.algorithm; :cT)M(o
D tsZP (
import org.rut.util.algorithm.support.BubbleSort; zTz}H*U
import org.rut.util.algorithm.support.HeapSort; Njq}M/{U
import org.rut.util.algorithm.support.ImprovedMergeSort; ?YhDjQs
import org.rut.util.algorithm.support.ImprovedQuickSort; p~pD`'%
import org.rut.util.algorithm.support.InsertSort; fqNh\~kja
import org.rut.util.algorithm.support.MergeSort; VF%QM;I[Rc
import org.rut.util.algorithm.support.QuickSort; vB:\ZX4
import org.rut.util.algorithm.support.SelectionSort; ,+=9Rp`md
import org.rut.util.algorithm.support.ShellSort; o2/:e
-;""l{
/** !b8V&<
* @author treeroot oV|O`n
* @since 2006-2-2 -'rdN i
* @version 1.0 mw@Pl\=
*/ nzq
public class SortUtil { nL@'??I1
public final static int INSERT = 1; TOwd+]B
public final static int BUBBLE = 2; aukcO;oG<
public final static int SELECTION = 3; |23F@s1
public final static int SHELL = 4; lZFu|(
public final static int QUICK = 5; r$7.
public final static int IMPROVED_QUICK = 6; ]e>qvSuYh
public final static int MERGE = 7; > p`,
public final static int IMPROVED_MERGE = 8; p|>*M\LE#
public final static int HEAP = 9; ~Y 6'sM|
*ap,r&]#F
public static void sort(int[] data) { /cjz=r1U>
sort(data, IMPROVED_QUICK); 144Y.
} z0"t]4s
private static String[] name={ J_Lmy7~xbD
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 6$u/N gS
}; u]^s2v
s~M4.06P
private static Sort[] impl=new Sort[]{ 1w,_D.1'
new InsertSort(), +! 1_Mt6
new BubbleSort(), 3CCs_AO
new SelectionSort(), ^y<^hKjV
new ShellSort(), 2)}n"ibbT
new QuickSort(), 4:/]Y=)x
new ImprovedQuickSort(), -&+:7t
new MergeSort(), |t,sK aL
new ImprovedMergeSort(), uGU2
new HeapSort() ~9>H(c
}; P,v7twc0M
[2:d@=%.
public static String toString(int algorithm){ }$ y.qqG
return name[algorithm-1]; QiCia#_
} :;$MUOps
Z{8%Cln
public static void sort(int[] data, int algorithm) { hf`y_H+\7
impl[algorithm-1].sort(data); Fh~9(Y#
} 7nt(Rtbsu
Z+xkN
public static interface Sort { hY)zKX_r
public void sort(int[] data); ak7%
} l\_!oa~
pY&6p~\p
public static void swap(int[] data, int i, int j) { ;>,B(Xz4i
int temp = data; u`ir(JIj]
data = data[j]; 3.Fko<D4jD
data[j] = temp; 7%h;To-<6
} @&jR^`Y.
} FPc`J