[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; I|$'Q$m~
} WEno+Z~=1'
int i1=l; %0NLRfp
int i2=mid+1; ;])I>BT[
for(int cur=l;cur<=r;cur++){ dz8-):
if(i1==mid+1) Bfbl#ZkyL
data[cur]=temp[i2++]; x*:n4FZ7b
else if(i2>r) P1dN32H o
data[cur]=temp[i1++]; !?yxh/>lM
else if(temp[i1] data[cur]=temp[i1++]; ^%-NPo<
else G=vN;e_$_b
data[cur]=temp[i2++]; g<M0|eX@~
} eT;AAGql
} 1UC2zM"
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} *hV4[=
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改进后的归并排序: |p;4dL
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package org.rut.util.algorithm.support; [0K=I64 z
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import org.rut.util.algorithm.SortUtil; QxKAXq@)i
;F|jG}M"
/** Q{O/xLf
* @author treeroot ;9K[~
* @since 2006-2-2 IoQr+:_R
* @version 1.0 yU> T8oFh
*/ &Y 'z?N
public class ImprovedMergeSort implements SortUtil.Sort { AlUJ1^o)
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private static final int THRESHOLD = 10; Xe)Pg)J1
r~I.F!{
/* KUbJe)}g
* (non-Javadoc) OE6#YT
* P;jlHZ9?O
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) y*_K=}pk
*/ RTA%hCr!
public void sort(int[] data) { C:Vv!u
int[] temp=new int[data.length]; yj>){NcX
mergeSort(data,temp,0,data.length-1); P1$f}K}
} M\I_{Q?_
fH&zR#T7U4
private void mergeSort(int[] data, int[] temp, int l, int r) { |n)<4%i8J
int i, j, k; OthG7+eF
int mid = (l + r) / 2; dZF8R
if (l == r) 'HCnB]1
return; D^$]>-^
if ((mid - l) >= THRESHOLD) S=4R5igrC
mergeSort(data, temp, l, mid); V_jiOT!
else +5#x6[
insertSort(data, l, mid - l + 1); !TGr.R
if ((r - mid) > THRESHOLD) P?xA$_+
mergeSort(data, temp, mid + 1, r); U8E0~[y'
else *jGPGnSo
insertSort(data, mid + 1, r - mid); (yfXMp,x
]XY0c6 <
for (i = l; i <= mid; i++) { P>|Ef~j
temp = data; D$ej+s7
} OqtQA#uL
for (j = 1; j <= r - mid; j++) { )q^(T1
temp[r - j + 1] = data[j + mid]; 0Qt~K#mr/
} iW'_R{)T
int a = temp[l]; #T[%6(QW
int b = temp[r]; L+7*NaPY*
for (i = l, j = r, k = l; k <= r; k++) { 7$K}qsr<
if (a < b) { R \ia6
data[k] = temp[i++]; ,eDu$8J9
a = temp; <H!O:Mf_p
} else { ~bWhth2*
data[k] = temp[j--]; JXL'\De ;
b = temp[j]; m!;G/s*
} ;>5,
} R<>tDwsZGa
} z[*zuo
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/** G<|:605
* @param data 7O"hiDQ
* @param l ("b*? : B
* @param i %Or2iuO%-,
*/ _nP)uU$
private void insertSort(int[] data, int start, int len) { w\p9J0
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); DDWp4`CS|
} [Q|M/|mnR1
} 9Kx<\)-GMD
} *G\=i A
} X`D+jiQ(f
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堆排序： PFm\[2
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package org.rut.util.algorithm.support; g(nK$,c
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import org.rut.util.algorithm.SortUtil; f'i6QMk\&
^zHRSO
/** n?}5!
* @author treeroot jK e.gA
* @since 2006-2-2 _%;M9Sg3
* @version 1.0 3hLqAj
*/ 72u db^
public class HeapSort implements SortUtil.Sort{ v:?o3 S
j6HR&vIM
/* (non-Javadoc) xuF5/(__
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) g[AA,@p+
*/ j!7Qw 8
public void sort(int[] data) { 1!d)PK>1$
MaxHeap h=new MaxHeap(); VJ*\pM@no
h.init(data); $3]b>v
for(int i=0;i h.remove(); tGC2 ^a#~
System.arraycopy(h.queue,1,data,0,data.length); Tn /Ut}]O
} Ms,@t^nk
>J>>\Y(p
private static class MaxHeap{ lAz2%s{6
Psp^@
void init(int[] data){ .N!{ U
this.queue=new int[data.length+1]; 6W$rY] h!
for(int i=0;i queue[++size]=data; [1Uz_HY["3
fixUp(size); Ajg\aof0{
} uS&LG#a
} 0`6),R'x
rtus`A5p
private int size=0; 1g~y]iQ
A*Rn<{U
private int[] queue; o_(0
7pP+5&*
public int get() { <&6u]uKrW
return queue[1]; D,E$_0
} 4QO/ff[ o
$e*B:}x}
public void remove() { k8 u%$G
SortUtil.swap(queue,1,size--); m9woredS,
fixDown(1); "Tv:*L5
} `[OXVs,7"
file://fixdown W"|mpxp
private void fixDown(int k) { 8?kP*tmcZ
int j; j3{HkcjJG
while ((j = k << 1) <= size) { mTJ"l(,3
if (j < size %26amp;%26amp; queue[j] j++; 4T%cTH:.9N
if (queue[k]>queue[j]) file://不用交换 3(C :X1
break; _F^$aZt?e
SortUtil.swap(queue,j,k); @UV{:]f~e
k = j; BKX9SL]
} xG8`'SNY
} 6< >SHw
private void fixUp(int k) { *%I[ ke *
while (k > 1) { 4~Dax)
int j = k >> 1; L_k9g12
if (queue[j]>queue[k]) |Q5+l.%
break; K\aAM;)-
SortUtil.swap(queue,j,k); JN|VPvjE
k = j; M7vj^mt?
} NocFvF7\
} S~> 5INud
xD4$0Ppu
} #)`\!)?
26 ?23J ;
} Dp`HeSKU^
*Q5x1!#z#
SortUtil： Z}+yI,
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package org.rut.util.algorithm; /BT1oWi1y
=U c$D*
import org.rut.util.algorithm.support.BubbleSort; <wa(xDBw
import org.rut.util.algorithm.support.HeapSort; `36N n+A
import org.rut.util.algorithm.support.ImprovedMergeSort; k2.G%]j
import org.rut.util.algorithm.support.ImprovedQuickSort; <6R"h-u"
import org.rut.util.algorithm.support.InsertSort; R1/q3x
import org.rut.util.algorithm.support.MergeSort; GG+5/hU
import org.rut.util.algorithm.support.QuickSort; xDUaHE1co
import org.rut.util.algorithm.support.SelectionSort; P5Dk63z]
import org.rut.util.algorithm.support.ShellSort; AEqq1A
7`dY1.rq
/** B=dseeG[To
* @author treeroot as#J qE
* @since 2006-2-2 {+Sq<J_`M
* @version 1.0 t!0dJud
*/ tt{`\1q
public class SortUtil { C\A49q
public final static int INSERT = 1; ,T{oy:rB
public final static int BUBBLE = 2; a,cC!
public final static int SELECTION = 3; ~&KX-AC@
public final static int SHELL = 4; '?8Tx&}U8
public final static int QUICK = 5; # 66e@
public final static int IMPROVED_QUICK = 6; >XnO&hW
public final static int MERGE = 7; Um\0i;7 ~4
public final static int IMPROVED_MERGE = 8; 8YKQItK
public final static int HEAP = 9; ~#Aa Ldq
r)8z#W>s
public static void sort(int[] data) { "xn|zB
sort(data, IMPROVED_QUICK); LABNj{=D!
} :Y^I]`lR"
private static String[] name={ ]u0Jd#@
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" d;44;*D
}; a:b^!H>#
M(2`2-/xh
private static Sort[] impl=new Sort[]{ mW +tV1XjG
new InsertSort(), .8(%4ejJ(
new BubbleSort(), !F$R+A+L
new SelectionSort(), ^yJ:+m;6K
new ShellSort(), vI|As+`$d
new QuickSort(), ESv:1o`?n
new ImprovedQuickSort(), L/fRF"V
new MergeSort(), VaJfD1zd1
new ImprovedMergeSort(), Onw24&
new HeapSort() ]Uh1l.O
}; ="dDA/,$VS
c&m9)r~zP
public static String toString(int algorithm){ Jn#K0(FQ
return name[algorithm-1]; ] D6|o5
} lkwh'@s.
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public static void sort(int[] data, int algorithm) { .`J:xL%Z
impl[algorithm-1].sort(data); GO~k '
} gl "_:atW
N,|r1u9X#
public static interface Sort { A?,A(-0C
public void sort(int[] data); $:;%bjSI
} l[*sHi
rN#\AN
public static void swap(int[] data, int i, int j) { a:}E& ,&M
int temp = data; j3P$@<
data = data[j]; eM }W6vIn
data[j] = temp; ?bI?GvSh
} J3IRP/*z
} !Rqx2Q