[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; oYqHl1cs
} ZNQx;51
int i1=l; d0(zB5'}
int i2=mid+1; E4X6f
for(int cur=l;cur<=r;cur++){ LikcW#
if(i1==mid+1) l f>/
data[cur]=temp[i2++]; k =! Q
else if(i2>r) ~:DL{ZeEb
data[cur]=temp[i1++]; ?:"ABkL|+Y
else if(temp[i1] data[cur]=temp[i1++]; /|?$C7%a\D
else h&0zR#t
data[cur]=temp[i2++]; A=<7*E
} V 0Bl6
} &hYgu3O
b$_81i
} P[3i!"O>
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改进后的归并排序: eAy,T<#
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package org.rut.util.algorithm.support; S/]\GG{
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import org.rut.util.algorithm.SortUtil; Z8SwW<{ $
enQ*uMKd^
/** =QqH`.3
* @author treeroot kXz~ez 7
* @since 2006-2-2 .#( vx;
* @version 1.0 Q-<]'E#\(
*/ #V>R#Oh}
public class ImprovedMergeSort implements SortUtil.Sort { P 9?cp{*
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private static final int THRESHOLD = 10; (]]hSkE
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/* g|~px$<iY
* (non-Javadoc) h(|T.
* K\K& K~Z
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) cN,*QN
*/ }3#\vn0gT
public void sort(int[] data) { <,} h8;Fr
int[] temp=new int[data.length]; RjWwsC~B
mergeSort(data,temp,0,data.length-1); Q %o@s3~O
} H>TO8;5(
c-+NWC
private void mergeSort(int[] data, int[] temp, int l, int r) { ]\pi!oa
int i, j, k; rFXdxRP;M
int mid = (l + r) / 2; v=llg ^
if (l == r) s=8H<'l
return; v) n-
if ((mid - l) >= THRESHOLD) s$M(-"mg
mergeSort(data, temp, l, mid); ]C \+b<
else )?rq8VO
insertSort(data, l, mid - l + 1); a4*v'Xc5
if ((r - mid) > THRESHOLD) Q"&Mr+
mergeSort(data, temp, mid + 1, r); *'Yy@T8M
else R"t#dG]1t
insertSort(data, mid + 1, r - mid); S=qh7ML
KFrsXf
for (i = l; i <= mid; i++) { F-m%d@P&X
temp = data; !rnjmc
} F6\{gQ<E
for (j = 1; j <= r - mid; j++) { d( v"{N}
temp[r - j + 1] = data[j + mid]; OUBGbld
} D3Q+K
int a = temp[l]; &N}"4
int b = temp[r]; e9LX0=
for (i = l, j = r, k = l; k <= r; k++) { ~` tuPk~l
if (a < b) { -@>{q/
data[k] = temp[i++]; i2<z"v63
a = temp; u&zY>'}zm
} else { 5 ^{~xOM5
data[k] = temp[j--]; *Soi
b = temp[j]; R$&;
} 5Kzt8Tv[
} l(>6Yq
} Pe%[d[k
[:X@|,1V!L
/** j,YrM?Xdo
* @param data tT]@yo|?e/
* @param l 6"-$WUlg
* @param i j<^!"_G]*?
*/ 5%,3)H{;t
private void insertSort(int[] data, int start, int len) { o5Oig
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); _}R$h=YD
} Z '5itN^
} YSnh2 Bq
} (5$Ge$
} Z ]A |"6<
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堆排序： m212 gc0u
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package org.rut.util.algorithm.support; XFhH+4#]
2!%)_<
import org.rut.util.algorithm.SortUtil; 3bRxV @0.
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/** NM. e4
* @author treeroot o0r&w;!
* @since 2006-2-2 B!'K20"gF
* @version 1.0 IyO0~Vx>
*/ 4%0s p
public class HeapSort implements SortUtil.Sort{ hW*o;o7u
<'\Nv._2a
/* (non-Javadoc) u&~Xgq5[
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) J^+w]2`S
*/ w{tA{{
public void sort(int[] data) { A{_CU-,
MaxHeap h=new MaxHeap(); v47' dC
h.init(data); ".}R$W
for(int i=0;i h.remove(); WuK<?1meN
System.arraycopy(h.queue,1,data,0,data.length); V!:!c]8F
} e:G~P u`
>.wZEQ6QK
private static class MaxHeap{ eT%x(P
D,IT>^[^7
void init(int[] data){ HlE8AbEg
this.queue=new int[data.length+1]; J&6p/'UPZ
for(int i=0;i queue[++size]=data; >DRxF5b{
fixUp(size); @5Tl84@Q
} \;7U:Y$v
} Cmx<>7fN
P>_O :xD
private int size=0; 2Bt/co-~4
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private int[] queue; SQ)BS/8A
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public int get() { Gamn,c9
return queue[1]; <EC"E #p
} aImzK/
)"TVR{I%B
public void remove() { rxp|[>O<
SortUtil.swap(queue,1,size--); C^q|(G)
fixDown(1); Jt$YSp=!!
} &g?GF\Y
file://fixdown g1t6XVS$9
private void fixDown(int k) { QFnuu-82"
int j; ld(60?z>FH
while ((j = k << 1) <= size) { i9 aR#
if (j < size %26amp;%26amp; queue[j] j++; !Yc:yF
if (queue[k]>queue[j]) file://不用交换 !gI0"p?
break; o@A`AA9
SortUtil.swap(queue,j,k); ~&~4{
k = j; c|<F8n
} hNc8uV{r=
} CVO_F=;
private void fixUp(int k) { IJf%OA>v
while (k > 1) { &r[f ;|o
int j = k >> 1; \]>821r
if (queue[j]>queue[k]) /Am9w$_T[
break; rl.K{Uad
SortUtil.swap(queue,j,k); %Z6Q/+#fn
k = j; 7nPg2K&
} 59nRk}^$se
} ]*NYuEgc
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} H:~bWd'iz
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} "I56l2dxd
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SortUtil： ]j0+4w
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package org.rut.util.algorithm; "e-z2G@z
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import org.rut.util.algorithm.support.BubbleSort; gb,ZN^3<-
import org.rut.util.algorithm.support.HeapSort; ltOS()[X
import org.rut.util.algorithm.support.ImprovedMergeSort; g:uVl;>
import org.rut.util.algorithm.support.ImprovedQuickSort; J *LPv9)
import org.rut.util.algorithm.support.InsertSort; L\mF[Kd#+T
import org.rut.util.algorithm.support.MergeSort; ?EUg B\
import org.rut.util.algorithm.support.QuickSort; La6 9or
import org.rut.util.algorithm.support.SelectionSort; rQzdHA
import org.rut.util.algorithm.support.ShellSort; ";U~wZW_
aH;AGbp
/** huqtk4u
* @author treeroot ql9n`?Q
* @since 2006-2-2 ~Jf(M^E
* @version 1.0 X!g;;DB\
*/ ?[#w*Am7
public class SortUtil { TJYhgna
public final static int INSERT = 1; e,Cc.T\o
public final static int BUBBLE = 2; _V3z!aI
public final static int SELECTION = 3; 7s^b@&Le
public final static int SHELL = 4; l]wfL;u
public final static int QUICK = 5; KS#A*BRQ
public final static int IMPROVED_QUICK = 6; 9{(q[C5m
public final static int MERGE = 7; }S iR;2W
public final static int IMPROVED_MERGE = 8; 1{/Cr K/o
public final static int HEAP = 9; cQ1[x>OcU
4!14:mq
public static void sort(int[] data) { f:3cV(mC
sort(data, IMPROVED_QUICK); {zZ)JWM<w
} = V')}f~C
private static String[] name={ '-myOM7
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 6}Y==GPt
}; 0;x&\x7K
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private static Sort[] impl=new Sort[]{ N!.o`4 "z
new InsertSort(), BqJ|l7+
new BubbleSort(), 7&,$
new SelectionSort(), C'@I!m._i
new ShellSort(), `(j~b=PP
new QuickSort(), =m<b+@?T
new ImprovedQuickSort(), io\t>_
new MergeSort(), EkV#i
new ImprovedMergeSort(), .hckZx /
new HeapSort() n-K/dI
}; Z>UM gu3c
;8=Bee4
public static String toString(int algorithm){ <LZ#A@]71
return name[algorithm-1]; "~ =O`5V
} S?Cd,WxT
7/M[T\c
public static void sort(int[] data, int algorithm) { /w?zO,!
impl[algorithm-1].sort(data); <:AA R2=
} w nBvJb]4l
#[i3cn
public static interface Sort { nKd'5f1
public void sort(int[] data); .Ao _cx
} ?6"U('y>n
R{[v#sF >#
public static void swap(int[] data, int i, int j) { "KF]s.
int temp = data; !pj&h0CR
data = data[j]; BNk>D|D;
data[j] = temp; S['rTuk
} aAP86MHO
} ^KD1dy3(