[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; k}Clq;G
} 8`LLHX1|
int i1=l; px(1Ppb9
int i2=mid+1; Nm:|C 3_I
for(int cur=l;cur<=r;cur++){ MT#[ -M\
if(i1==mid+1) HjF'~n
data[cur]=temp[i2++]; xzf)_ <
else if(i2>r) !E>3N:
data[cur]=temp[i1++]; D<L{Z[
else if(temp[i1] data[cur]=temp[i1++]; @SVEhk#
else 2Z1(J% 7
data[cur]=temp[i2++]; pcxl2I
} r'JK$9
} PQ!?gj
qaSv]k.
} 93p9?4;n-
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改进后的归并排序: (S93 %ii
ne~#{q
package org.rut.util.algorithm.support; H(ftOd.y
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import org.rut.util.algorithm.SortUtil; K]azUK7
i~PZvxt
/** g='2~c
* @author treeroot oTa+E'q
* @since 2006-2-2 K>p:?w
* @version 1.0 (YH{%8 Z0
*/ X/D9%[{&
public class ImprovedMergeSort implements SortUtil.Sort { gGz_t,=
sy#j+gZ
private static final int THRESHOLD = 10; -Y,Ibq
"Q!{8 9Y
/* /|^^v DL
* (non-Javadoc) /u1zRw
* ll^O+>1dO
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) UVRV7^eTe
*/ !LSWg:Ev+
public void sort(int[] data) { IZ ha* 7
int[] temp=new int[data.length]; ^O9m11
mergeSort(data,temp,0,data.length-1); k5<0M'
} !f[N&se
z>#$#:Z4
private void mergeSort(int[] data, int[] temp, int l, int r) { #3jZ7RqzQ
int i, j, k; b<MMli
int mid = (l + r) / 2; q:eAL'OkM
if (l == r) 9GOyVKUv
return; Xq$0% WjG
if ((mid - l) >= THRESHOLD) oO,p.X%
mergeSort(data, temp, l, mid); qoq<dCt3
else C8SNSeg
insertSort(data, l, mid - l + 1); M#IR=|P]
if ((r - mid) > THRESHOLD) J)~=b_'<
mergeSort(data, temp, mid + 1, r); 4ov~y1Da)
else dz DssAHy
insertSort(data, mid + 1, r - mid); 6!V* :.(
SQRz8,sqkw
for (i = l; i <= mid; i++) { Fsdn2{g8U
temp = data; .h }D%Qa
} 8XE0 p7
for (j = 1; j <= r - mid; j++) { 5rhdm?Ls0
temp[r - j + 1] = data[j + mid]; /qY(uPJ
} ;<Q_4 V
int a = temp[l]; 7tnzgtal
int b = temp[r]; 8BdeqgU/_
for (i = l, j = r, k = l; k <= r; k++) { n*|-"'j
if (a < b) { "R]K!GUU
data[k] = temp[i++]; tt91)^GdYa
a = temp; O`| ri5d
} else { mI18A#[ 3
data[k] = temp[j--]; ZvJx01F{
b = temp[j]; l@ K<p
} .BvV[`P
} 6P8X)3CE<T
} y.2 SHn0
xcA`W|M
/** `x3c},'@k
* @param data AnQRSB (
* @param l !k) ?H* ^@
* @param i Qp}<8/BM\
*/ 4P5wEqU.<
private void insertSort(int[] data, int start, int len) { Rz<fz"/2<
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); Qpc>5p![3
} t s&C0
} [LK 9^/V
} #<:khs6
} xb\lbS{ f
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堆排序： v?rN;KY#pK
cD]t%`*
package org.rut.util.algorithm.support; qdhD6#r
fsu'W]f
import org.rut.util.algorithm.SortUtil; !Iqyt. .
SrxX-Hir
/** rHznXME$wZ
* @author treeroot b1+Nm
* @since 2006-2-2 e2>gQ p/
* @version 1.0 }0I! n@
*/ TAP/gN'
public class HeapSort implements SortUtil.Sort{ 'yl`0,3wV
2ma.zI@^u9
/* (non-Javadoc) ~be&T:7.
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) !HFwQGP.Y
*/ )<+Z,6
public void sort(int[] data) { Xa36O5$4]9
MaxHeap h=new MaxHeap(); xf|=n
h.init(data); @E1N9S?>
for(int i=0;i h.remove(); g\2Y605DM
System.arraycopy(h.queue,1,data,0,data.length); sf%=q$z
} w1.~N`g$
M C>{I3
private static class MaxHeap{ `*!.B
{Tx+m;5F
void init(int[] data){ c#_%|gg
this.queue=new int[data.length+1]; Yk }zN_v
for(int i=0;i queue[++size]=data; >t.I,Zn
fixUp(size); FG?B:Zl%T
} P )`-cfg
} n{M!l\1
]F,5Oh :OY
private int size=0; oo`mVRVf
\;4RD$J
private int[] queue; dP )YPy_`
WFTTBUoH
public int get() { P'zA=Rd&~>
return queue[1]; W;2y.2*
} xHHG| u
F&Q:1`y
public void remove() { bjbm"~
SortUtil.swap(queue,1,size--); (Ys0|I3
fixDown(1); ~zi&u46
} ;R}:2
file://fixdown hX8;G!/
private void fixDown(int k) { I/t2c=f
int j; po!0j+r3
while ((j = k << 1) <= size) { -GQ`n01
if (j < size %26amp;%26amp; queue[j] j++; ZfoI7<?33
if (queue[k]>queue[j]) file://不用交换 *&!&Y*Jzg
break; rcAx3AK.
SortUtil.swap(queue,j,k); Ak&eGd$d
k = j; t '* L,
} 8KN0z<
} ;=aj)lemCr
private void fixUp(int k) { </Ja@%
while (k > 1) { "RiY#=}sm
int j = k >> 1; 624l5}@:
if (queue[j]>queue[k]) \K55|3~R
break; rdSkGb
SortUtil.swap(queue,j,k); ~Cm_=[
k = j; l'm!e'7_
} 7;5SK:X%dm
} v:|_!+g:
qJj"WU5
} s: pmB\
W:'H&`0
} <BEM`2B
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SortUtil： V\vt!wBcB
/'O? 8X<
package org.rut.util.algorithm; E:(DidSE@
'9.L5*wh]
import org.rut.util.algorithm.support.BubbleSort; `r+zNJ@q
import org.rut.util.algorithm.support.HeapSort; M8(N9)N
import org.rut.util.algorithm.support.ImprovedMergeSort; !59u z4
import org.rut.util.algorithm.support.ImprovedQuickSort; Qv~lH&jG
import org.rut.util.algorithm.support.InsertSort; usc"m huQ
import org.rut.util.algorithm.support.MergeSort; Wa.y7S0(@
import org.rut.util.algorithm.support.QuickSort; %=e^MN1
import org.rut.util.algorithm.support.SelectionSort; Y?IvG&])
import org.rut.util.algorithm.support.ShellSort; OiI29
1L3+KD~
/** Pg4go10|
* @author treeroot M-7^\wXTA
* @since 2006-2-2 *QH~z2:[
* @version 1.0 Bre:_>*
*/ E7mB=bt>=
public class SortUtil { Tg/?v3M88
public final static int INSERT = 1; xe`SnJgA
public final static int BUBBLE = 2; djmd @{Djt
public final static int SELECTION = 3; o&-D[|E|
public final static int SHELL = 4; 7fE U5@
public final static int QUICK = 5; cfSQqH
public final static int IMPROVED_QUICK = 6; &+|bAn9AJ
public final static int MERGE = 7; OJ?U."Lxm$
public final static int IMPROVED_MERGE = 8; LiyR,e
public final static int HEAP = 9; jEMnre3/
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public static void sort(int[] data) { 1 EL#T&
sort(data, IMPROVED_QUICK); s+0n0C
} Kt3T~k
private static String[] name={ /JjSx/
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" t9~Y ?
}; 0g'MFS
O%s7}bR3
private static Sort[] impl=new Sort[]{ _J&IL!S2
new InsertSort(), -[}AhNYK
new BubbleSort(), zD@RW<M
new SelectionSort(), ]kdU]}z
new ShellSort(), gY {/)"
new QuickSort(), 1EMrXnv,
new ImprovedQuickSort(), T&ib]LmR
new MergeSort(), pnpf/T{xpM
new ImprovedMergeSort(), Esdv+f}4;
new HeapSort() {VE1c'E"V?
}; /lLG|aAe
Lvb'qZ6n
public static String toString(int algorithm){ V~7Oa2'#B
return name[algorithm-1]; ~,m5dP#[bV
} C]a iu
9Xe|*bT
public static void sort(int[] data, int algorithm) { _};T:GOT
impl[algorithm-1].sort(data); Dco3`4pl
} J\?d+}hynX
,8.zbr
public static interface Sort { Ask~
public void sort(int[] data); ^S:I38gR#q
} !JQ'~#jKN
xJ^pqb
public static void swap(int[] data, int i, int j) { OouR4
int temp = data; b6^#{))"
data = data[j]; ;y.<I&
data[j] = temp; $aY:Z_s
} B/K{sI
} es1'z.UJ