[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; /{[p?7x>
} B6KG\,'|
int i1=l; )heHERbJ
int i2=mid+1; 4%|r$E/TQ
for(int cur=l;cur<=r;cur++){ !H<%X~|,
if(i1==mid+1) FjLMN{eH/
data[cur]=temp[i2++]; BjA$^i|8
else if(i2>r) p)]x,F
data[cur]=temp[i1++]; 3+vVdvu%
else if(temp[i1] data[cur]=temp[i1++]; :z *jl'L
else CS5[E-%}T=
data[cur]=temp[i2++]; @A<~bod
} ^zS;/%
} ZU;jz[}
O: #SjjK
} F?0Q AA
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改进后的归并排序: ^]~!:Ej0
Q#.E-\=^
package org.rut.util.algorithm.support; 3-)}.8F
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import org.rut.util.algorithm.SortUtil; &\Lu}t7Ru
%DA`.Z9#
/** 7s!rer>
* @author treeroot &-X51O C
* @since 2006-2-2 {^^LeUd#V
* @version 1.0 zA:q/i
*/ x25zk4-
public class ImprovedMergeSort implements SortUtil.Sort { N:S2X+}(
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private static final int THRESHOLD = 10; uJeJ=7,EO
o~q.j_Sa
/* *!{&n*N
* (non-Javadoc) KrHKM3<
* 7^mQfQv
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) +DR{aX/ll
*/ {6wXDZxv
public void sort(int[] data) { DUH_LnHw)
int[] temp=new int[data.length]; inZ0iU9dy
mergeSort(data,temp,0,data.length-1); ,8d&uR}x
} 2Vu?Y
`Mcg&Mi~
private void mergeSort(int[] data, int[] temp, int l, int r) { jp@X,HES
int i, j, k; ]=I2:Rb
int mid = (l + r) / 2; g)D@4RM
if (l == r) _@gg,2 u-
return; W1t_P&i
if ((mid - l) >= THRESHOLD) _`0DO4IU
mergeSort(data, temp, l, mid); @ 'N$5
else *yo'Nqu
insertSort(data, l, mid - l + 1); ,:MUf]Ky
if ((r - mid) > THRESHOLD) 4xg1[Z%:
mergeSort(data, temp, mid + 1, r); s*Z yr%R
else p>:.js5.a
insertSort(data, mid + 1, r - mid); 7!FiPH~kM
F$kiSjh9aJ
for (i = l; i <= mid; i++) { 8ph1xQ'
temp = data; kM=&Tfpj
} Fm6]mz%~u#
for (j = 1; j <= r - mid; j++) { pS7y3(_
temp[r - j + 1] = data[j + mid]; )1R[X!KQ7
} ;:ZD<'+N
int a = temp[l]; #N64ZXz_
int b = temp[r]; Aw4)=-LKO
for (i = l, j = r, k = l; k <= r; k++) { Eb63O
if (a < b) { SkVah:cF-
data[k] = temp[i++]; u|u)8;'9(
a = temp; R\#5;W^
} else { >1]hR)Ip
data[k] = temp[j--]; W$J.B!O
b = temp[j]; nmE H/a
} hb/Z{T'
} {TMng&
} DAORfFG74
YN:Sn\`D 8
/** F{.g05^y
* @param data eoQt87VCU
* @param l MTgf.
* @param i KZ^>_K&
*/ f4NN?"W)
private void insertSort(int[] data, int start, int len) { @KLX,1K
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 42-T&7k
} BePb8 k<y
} t U~q4$qqE
} r;H#cMj
} [O!/hppN
%]tW2s"
堆排序： iS"6)#a72
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package org.rut.util.algorithm.support; oblw!)
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import org.rut.util.algorithm.SortUtil; <8Zs;>YuK
_z.CV<
/** N}{V*H^0QU
* @author treeroot 7*Zm{r@u
* @since 2006-2-2 |q\i, }
* @version 1.0 bmKvvq
*/ 6!*zgA5M'
public class HeapSort implements SortUtil.Sort{ $`t2SD
d0zp89BEn
/* (non-Javadoc) fmUrwI1 %
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) _ |HA\!
*/ 5N;xo??
public void sort(int[] data) { 7M?Sndp$
MaxHeap h=new MaxHeap(); 1}ifJ~)5S
h.init(data); $~ d6KFT
for(int i=0;i h.remove(); fJ\u8
System.arraycopy(h.queue,1,data,0,data.length); B/3xV:Gy
} o4z|XhLr
I\j-
private static class MaxHeap{ gssEdJ
)2Y]A^Y
void init(int[] data){ XQ}7.u!
this.queue=new int[data.length+1]; N"~P$B1X
for(int i=0;i queue[++size]=data; KRhls"\1
fixUp(size); Lc-WfzT
} iP$>/[I
} X .K*</(g
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private int size=0; eU]I !pI<
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private int[] queue; vsYbR3O
9.6ni1a'
public int get() { N[yS heT
return queue[1]; $:vS_#
} ~C?)- ]bF
~D/1U)kt
public void remove() { A[:(#iR5-E
SortUtil.swap(queue,1,size--); ]2iEi`"[
fixDown(1); 5mm&l+N)
} vOtILL6
file://fixdown B;':Eaa@
private void fixDown(int k) { ([ xYOxcp5
int j; yuIy?K
while ((j = k << 1) <= size) { @oE^(
if (j < size %26amp;%26amp; queue[j] j++; >G7dw1;
if (queue[k]>queue[j]) file://不用交换 ""$vaqt
break; 6"o=`Sq
SortUtil.swap(queue,j,k); S?6-I,]h
k = j; Q@W!6]*\
} ?PS?_+E\L
} 8AuE:=?,,
private void fixUp(int k) { OSfT\8YA
while (k > 1) { >tPf.xI|l
int j = k >> 1; IdMwpru(
if (queue[j]>queue[k]) .zl[nx[9"D
break; k6J&4?xZ
SortUtil.swap(queue,j,k); pg!MtuC}
k = j; &ds+9A
} O$;#GpR
} z5oJQPPi
ke!
} S-}c_zbl;
@87Y/_l
} |/H?\]7
X.S<",a{qz
SortUtil： +lfO4^V
*r[V[9+y-D
package org.rut.util.algorithm; 1x=x,lcL
vK@UK"m
import org.rut.util.algorithm.support.BubbleSort; cD6^7QF
import org.rut.util.algorithm.support.HeapSort; u8.Tu7~
import org.rut.util.algorithm.support.ImprovedMergeSort; kS&>g
import org.rut.util.algorithm.support.ImprovedQuickSort; }eW<P079
import org.rut.util.algorithm.support.InsertSort; 4_iA<}>|
import org.rut.util.algorithm.support.MergeSort; j'U1lEZm2
import org.rut.util.algorithm.support.QuickSort; >qOG^{&x
import org.rut.util.algorithm.support.SelectionSort; 9Q}g Vqn
import org.rut.util.algorithm.support.ShellSort; 2C}Yvfm4
\?R#ZxP@
/** FG[rH]
* @author treeroot .#bf9JOE
* @since 2006-2-2 o+}k$i!6
* @version 1.0 ,dTmI{@O
*/ %Z<{CV
public class SortUtil { `7w-_o %
public final static int INSERT = 1; xSd&xwP
public final static int BUBBLE = 2; R'`'q1=R
public final static int SELECTION = 3; Cs[d:T
public final static int SHELL = 4; xx>hJ!
public final static int QUICK = 5; bY.VNA
public final static int IMPROVED_QUICK = 6; *|g[Mn
public final static int MERGE = 7; z2t+1In,
public final static int IMPROVED_MERGE = 8; ih/E,B"
public final static int HEAP = 9; w-e{_R
64mEZ_kG,
public static void sort(int[] data) { .!KsF h,pK
sort(data, IMPROVED_QUICK); PIa!NPy
} |&JeJ0k>~
private static String[] name={ h#O9TB
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" QHZ",1F
}; U< G2tn(
.gDq+~r8O
private static Sort[] impl=new Sort[]{ M)+pH
new InsertSort(), lP`BKc,
new BubbleSort(), B8T$<
new SelectionSort(), ; $80}TY '
new ShellSort(), \ m~?yq8H
new QuickSort(), wxo
new ImprovedQuickSort(), ]$Z:^"JS3
new MergeSort(), :gU5CUm
new ImprovedMergeSort(), o=($'(1
new HeapSort() T8z?_ *k
}; H,L{N'[Xph
UTyV6~
public static String toString(int algorithm){ Ha-]U:Vcx
return name[algorithm-1]; K-C,n~-
} BNNM$.ZIQ
|{YN3"qN
public static void sort(int[] data, int algorithm) { A,DBq9Z+4R
impl[algorithm-1].sort(data); e9KD mX_
} >[|N%9\
@!f4>iUy
public static interface Sort { #mu L-V
public void sort(int[] data); ,<tJ`,0X
} w7?fJ")
|cma7q}p
public static void swap(int[] data, int i, int j) { ~/`/r%1/J
int temp = data; nFEJO&1+
data = data[j]; Re8x!e'>
data[j] = temp; ~%/Rc`
} 8O,\8:I#
} h.>SVQzU