[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; [^}bc-9?i
} zfI{cMn'J
int i1=l; YI*H]V%w
int i2=mid+1; G$'UK
for(int cur=l;cur<=r;cur++){ ~a2|W|?
if(i1==mid+1) %hBwc#^
data[cur]=temp[i2++]; q({-C
else if(i2>r) q9{ h@y
data[cur]=temp[i1++]; ltkARc3
else if(temp[i1] data[cur]=temp[i1++]; :d35?[
else #W/Ch"Kv
data[cur]=temp[i2++]; <m~8pM
} <5j%!6zo
} X,G"#j^
^4,LIIUj
} n+&8Uk
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改进后的归并排序: Ws2?sn#x
vs+aUT C\
package org.rut.util.algorithm.support; lY@2$q9BT
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import org.rut.util.algorithm.SortUtil; 2i#Ekon
4zhh**]B
/** 2f%+1uU
* @author treeroot O>vCi&
* @since 2006-2-2 %wru)
* @version 1.0 G?LC!9MB
*/ NpM;vO
public class ImprovedMergeSort implements SortUtil.Sort { <w*WL_P
ct=K.m@E%X
private static final int THRESHOLD = 10; -&1P2m/46
wsQuJrG
/* x|d?'
* (non-Javadoc) (U$;0`
* /%7&De6Xg
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 7D>_<)%d=
*/ s{7bu|0
public void sort(int[] data) { P"}"q ![
int[] temp=new int[data.length]; V>obMr^5
mergeSort(data,temp,0,data.length-1); F?FfRzZ[
} EQpF:@_
IIGx+>
private void mergeSort(int[] data, int[] temp, int l, int r) { LDU4 D
int i, j, k; 3rHn?
int mid = (l + r) / 2; ' e!WZvr
if (l == r) M6A0D+08
return; BUsxgs"),
if ((mid - l) >= THRESHOLD) iyR"O1]
mergeSort(data, temp, l, mid); 9dAtQwGR"6
else `S-%}eUv
insertSort(data, l, mid - l + 1); +!ljq~%
if ((r - mid) > THRESHOLD) n,s7!z/
mergeSort(data, temp, mid + 1, r); 4,R"(ej
else *CQZ6&^
insertSort(data, mid + 1, r - mid); "WtYqXyd
^jRX6
for (i = l; i <= mid; i++) { `s+kYWg'Z
temp = data; \5j}6Wj
} Z;1r=p#s
for (j = 1; j <= r - mid; j++) { H0])>1sWB
temp[r - j + 1] = data[j + mid]; `bV&n!Y_
} EBL-+%J8
int a = temp[l]; ,UVu.RjXN
int b = temp[r]; K8[Um!(
for (i = l, j = r, k = l; k <= r; k++) { ='+I dn#5
if (a < b) { !"RRw&0M
data[k] = temp[i++]; -(lP8Y~gFY
a = temp; kmu`sk"
} else { 0!0o[3*
data[k] = temp[j--]; 2v@B7r4}
b = temp[j]; ] `q]n
} =w`uZ;l$Q
} w 2U302TZ
} n`w]?bL
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/** \k"CtzoX
* @param data A*/8j\{n
* @param l LxWd_B
* @param i c1a$J`
*/ !J@!2S9
private void insertSort(int[] data, int start, int len) { 5#X R1#`
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); |dqESl,2
} biw . ~
} *[b>]GXd49
} 88S:E7 $
} Y}2Sr-@u
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堆排序： 3 4%B0
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package org.rut.util.algorithm.support; z'1%%.r;FM
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import org.rut.util.algorithm.SortUtil; S|@/"?DC
N`?/kubD
/** 0T(+z)Ki
* @author treeroot id8QagJ
* @since 2006-2-2 =)g}$r &<
* @version 1.0 /|}yf/^9X
*/ 4]p#9`j
public class HeapSort implements SortUtil.Sort{ .GNyADQp
$-t@=N@vO?
/* (non-Javadoc) /hVwrt(
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ae@!M
*/ 2T(+VeMQ=
public void sort(int[] data) { +Q);t,
MaxHeap h=new MaxHeap(); ns\I Y<Yo
h.init(data); M?}:N_9<J
for(int i=0;i h.remove(); Oi^cs=}
System.arraycopy(h.queue,1,data,0,data.length); ibwV#6
} 1HAnOy0
=v<A&4
private static class MaxHeap{ 0QfDgDX
-Hw3rv3o
void init(int[] data){ +%K~
this.queue=new int[data.length+1]; vV9vB3K5?
for(int i=0;i queue[++size]=data; EH M59s|B
fixUp(size); }#4Ek8nFR
} cjg~?R
} _Ds,91<muQ
&)||~
private int size=0; Ac|dmu
%t!S 7UD
private int[] queue; .o C!~'
YtWw)IK
public int get() { TKAs@X,t
return queue[1]; ^^B_z|;Aa
} Y[R>?w
OyK#Rm2A=
public void remove() { `\;Z&jlpT
SortUtil.swap(queue,1,size--); -+Yark
fixDown(1); {~Jk(c~I
} 8{i}^.p
file://fixdown ?r8hl.Z>
private void fixDown(int k) { $Q'z9ghEg
int j; v_/<f&r
while ((j = k << 1) <= size) { k_1@?&3
if (j < size %26amp;%26amp; queue[j] j++; `]6<j<' ,
if (queue[k]>queue[j]) file://不用交换 VX8CEO
break; pO:]3qv
SortUtil.swap(queue,j,k); C8Mx>6
k = j; F?H=2mzKbz
} &zEBfr
} 6\K\d_x
private void fixUp(int k) { :@-yK8q's
while (k > 1) { CqZHs 9+e&
int j = k >> 1; ^QJJ2jZ
if (queue[j]>queue[k]) [v*q%Mi_
break; !|u?z%
SortUtil.swap(queue,j,k); |?g-8":H8P
k = j; ;A7JX:*?y=
} xypgG;`\
} NqOX);'L0
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} ?fq!BV
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} Zxqlhq/)
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SortUtil： %3#C0%{x
"Z,T%]
package org.rut.util.algorithm; l,l6j";ohd
zSfUM.fM
import org.rut.util.algorithm.support.BubbleSort; `W~
import org.rut.util.algorithm.support.HeapSort; R0tT4V+
import org.rut.util.algorithm.support.ImprovedMergeSort; ~ |A0*
import org.rut.util.algorithm.support.ImprovedQuickSort; Xz)F-C27h
import org.rut.util.algorithm.support.InsertSort; #Mk:4
import org.rut.util.algorithm.support.MergeSort; 2=8PA/
import org.rut.util.algorithm.support.QuickSort; Q25VG5G
import org.rut.util.algorithm.support.SelectionSort; u)o-H!a
import org.rut.util.algorithm.support.ShellSort; Cfd* Q
~AX~z)
/** _FE uQ9E
* @author treeroot NjEi.]L*fX
* @since 2006-2-2 xYYa%PhIC
* @version 1.0 ?0*[ L
*/ "P(obk
public class SortUtil { $rr@3H+
public final static int INSERT = 1; m26YAcip}
public final static int BUBBLE = 2; +>!nqp
public final static int SELECTION = 3; \$Wpt#V
public final static int SHELL = 4; '=Lpch2J
public final static int QUICK = 5; *kqC^2t
public final static int IMPROVED_QUICK = 6; (Y7zaAG]
public final static int MERGE = 7; sw$uZ$$~#
public final static int IMPROVED_MERGE = 8; L{8_6s(:
public final static int HEAP = 9; LOfw #+]d
jTt9;?)
public static void sort(int[] data) { -6NoEmb)\'
sort(data, IMPROVED_QUICK); a%bE}
} >|kD(}Axf
private static String[] name={ Q]N&^ E
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" =|IlORf<
}; [{u3g4`}
v7./u4S|V
private static Sort[] impl=new Sort[]{ {b4`\I@<
new InsertSort(), wDW%v@
new BubbleSort(), *w*>\ZhOm
new SelectionSort(), -XCs?@8EQ
new ShellSort(), >Q=^X3to
new QuickSort(), '&#gs P9
new ImprovedQuickSort(), SKnYeT
new MergeSort(), JRFUNy1+e1
new ImprovedMergeSort(), ws!~MSIy
new HeapSort() G(#t,}S}@
}; C7NSmZ
z_ycH%p
public static String toString(int algorithm){ 0: hv6Ge^
return name[algorithm-1]; 0]c&K
} llX `
?%Nh4+3N>
public static void sort(int[] data, int algorithm) { [tfB*m5
impl[algorithm-1].sort(data); Q9O_>mZy
} lm;hW&O9
a0sz$u
public static interface Sort { !aF~5P7%
public void sort(int[] data); V27RK-.N!
} S}%z0g<
Wmcd{MOS
public static void swap(int[] data, int i, int j) { EC,`t*<
int temp = data; MU a[}?
data = data[j]; b1 w@toc
data[j] = temp; 1s=Q~*f~d
} G)}[!'<rR
} jD9u(qAlH