[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; tqU8>d0^
} z)*\njYe
int i1=l; 1| xKb(_l
int i2=mid+1; OJLyqncw
for(int cur=l;cur<=r;cur++){ YgkQF0+
if(i1==mid+1) ksqb& ux6
data[cur]=temp[i2++]; fp"GdkO#}i
else if(i2>r) vXR27
data[cur]=temp[i1++]; `u8=~]rblj
else if(temp[i1] data[cur]=temp[i1++]; x=1Sbs w{
else pzDz@lAwR
data[cur]=temp[i2++]; V##TG0
} O$Dj_R#
} J]&nZud`
R9Y{kk0M
} .zdmUS:
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改进后的归并排序: 'G3|PA7v
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package org.rut.util.algorithm.support; ~rbJtz
}An;)!>(nF
import org.rut.util.algorithm.SortUtil; Olq`mlsK
.1""U ']
/** i#Fe`Z ~J
* @author treeroot ]=%u\~AvL
* @since 2006-2-2 Lor__ K
* @version 1.0 jx];=IC3tt
*/ %U&ztvR0C
public class ImprovedMergeSort implements SortUtil.Sort { -k3WY&9,
]8XIw`:f
private static final int THRESHOLD = 10; zS}!87r)
aDX4}`u
/* Qlhm:[
* (non-Javadoc) S)A;!}RK6
* 1++Fs
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) au7@-_
*/ FVoKNaK-
public void sort(int[] data) { <V4"+5cJ8
int[] temp=new int[data.length]; D+Z,;XZ
mergeSort(data,temp,0,data.length-1); P6 mDwR
} 1);E!D[
ch0x*[N@
private void mergeSort(int[] data, int[] temp, int l, int r) { DOWZhD
int i, j, k; Z ,98
int mid = (l + r) / 2; :J6FI6
if (l == r) }+ TA+;
return; uulzJbV,K
if ((mid - l) >= THRESHOLD) LQa1p
mergeSort(data, temp, l, mid); )0 i$Bo
else S >\\n^SbT
insertSort(data, l, mid - l + 1); i8(n(
if ((r - mid) > THRESHOLD) M cbiO)@I
mergeSort(data, temp, mid + 1, r); ;+VHi%5Z
else AKKVd% P(
insertSort(data, mid + 1, r - mid); [{rne2sA
q&EwD(k
for (i = l; i <= mid; i++) { N+ei)-
temp = data; 6)#%36rP
} T04&Tl'CT
for (j = 1; j <= r - mid; j++) { 3- 4jSN\
temp[r - j + 1] = data[j + mid]; yI*h"?7T
} (:J U
int a = temp[l]; G)y'exk
int b = temp[r]; 4 !M6RL8{
for (i = l, j = r, k = l; k <= r; k++) { F}_Zh9/$(
if (a < b) { uBBW2
data[k] = temp[i++]; \AB*C_Ri
a = temp; ;Q%3WD
} else { I6F $@
data[k] = temp[j--]; R2nDK7j
b = temp[j]; uWerC?da
} ;JR_z'<
} bn"z&g
} ~1.~4~um
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/** fn\&%`U
* @param data $*dY f
* @param l !EO 2
* @param i kpO+
*/ +8V|
private void insertSort(int[] data, int start, int len) { O6r.q&U
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); ? 1b*9G%i
} 8]0?mV8iOE
} eqWb>$
} |:d:uj/
} ` oXL
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堆排序： 1"HSM=p
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package org.rut.util.algorithm.support; T1~,.(#
u=p-]?
import org.rut.util.algorithm.SortUtil; vpqMKyy
f%TP>)jag!
/** u:O6MO9^
* @author treeroot jj"?#`cW
* @since 2006-2-2 U-:_4[
* @version 1.0 Rk52K*Dc
*/ >dqeGM7Np>
public class HeapSort implements SortUtil.Sort{ t%>x}b"2T
U})Z4>[bvt
/* (non-Javadoc) ||sj*K
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 3q0^7)m0
*/ 7_ah1IEK
public void sort(int[] data) { KdTna6nY
MaxHeap h=new MaxHeap(); r$.v"Wh)
h.init(data); al:c2o
for(int i=0;i h.remove(); Q\<^ih51
System.arraycopy(h.queue,1,data,0,data.length); }x}JzA+2
} 5mYI5~ p
r<L>~S>yb
private static class MaxHeap{ ='|HUxFi
HxH=~B1"P
void init(int[] data){ s_N]$3'[E
this.queue=new int[data.length+1]; h^6Yjy
for(int i=0;i queue[++size]=data; 2VNfnk
fixUp(size); #2*2xt
} t#[u X?
} -,#LTW<.
z;EnAy{9
private int size=0; l<mEGKB#
k@= LR
private int[] queue; P(BV J_n
Z<0+<tt
public int get() { M.R]hI
return queue[1]; N%&D(_
} b/Z0{38
#ZRplA~C7]
public void remove() { -"e$ VB
SortUtil.swap(queue,1,size--); 5Pl~du
fixDown(1); :-kXZe
} m}3POl/*j
file://fixdown B>&eciY
private void fixDown(int k) { .8%mi'0ud
int j; )vFZl]
while ((j = k << 1) <= size) { (e;9,~u)
if (j < size %26amp;%26amp; queue[j] j++; P>t[35/1
if (queue[k]>queue[j]) file://不用交换 U)N_/
break; 6|D,`dk3U
SortUtil.swap(queue,j,k); VX;tglu2
k = j; %Sdzr!I7*
} b(~ gQM
} O/=i'0Xv
private void fixUp(int k) { ;Q =EI%_tv
while (k > 1) { h7S&tW GU
int j = k >> 1; .1F^=C.w
if (queue[j]>queue[k]) H19CVc\B
break; k98}Jx7J)"
SortUtil.swap(queue,j,k); L){rv)?="
k = j; ^f,('0p->
} XHlx89v7
} +$+'|w
n'#(iW)f
} ,JcQp=g
1!E+(Iq
} k+S 6)BQ7U
&,Xs=Lvmq
SortUtil： vx\h Njb
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package org.rut.util.algorithm; -R;.Md_
WM}bM]oe
import org.rut.util.algorithm.support.BubbleSort; 4JHFn [%
import org.rut.util.algorithm.support.HeapSort; oIM]
import org.rut.util.algorithm.support.ImprovedMergeSort; ya'@AJS
import org.rut.util.algorithm.support.ImprovedQuickSort; /N ^%=G#
import org.rut.util.algorithm.support.InsertSort; Dn?P~%
import org.rut.util.algorithm.support.MergeSort; $W8
import org.rut.util.algorithm.support.QuickSort; G1"=}Wt`
import org.rut.util.algorithm.support.SelectionSort; D>O{>;y[
import org.rut.util.algorithm.support.ShellSort; ^J>jU`)CJ
6#k Ap+g7
/** 4565U
* @author treeroot N3nk\)V\E
* @since 2006-2-2 "l&sDh%Lk<
* @version 1.0 t _Q/v
*/ x=qACoq
public class SortUtil { jBEt!Azur
public final static int INSERT = 1; q*ZjOqj
public final static int BUBBLE = 2; {A(=phN
public final static int SELECTION = 3; By@<N [I@
public final static int SHELL = 4; d+|8({X]D8
public final static int QUICK = 5; gtHk1 9
public final static int IMPROVED_QUICK = 6; >=2nAv/(
public final static int MERGE = 7; qx"?')+
public final static int IMPROVED_MERGE = 8; x c-=;|s
public final static int HEAP = 9; 56o?=|
dxkXt k
public static void sort(int[] data) { @Ey(0BxNu
sort(data, IMPROVED_QUICK); MWCP/~>a2
} C<6IiF[>%
private static String[] name={ @Ns^?#u~
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" m4nJ9<-
}; xnu|?;.}!
+MQf2|--
private static Sort[] impl=new Sort[]{ A;h0BQm/j
new InsertSort(), I/GZ
new BubbleSort(), %f@VOSs
new SelectionSort(), C/[2?[
new ShellSort(), SF;;4og
new QuickSort(), 8jjJ/Mz`
new ImprovedQuickSort(), -{ZTp8P>
new MergeSort(), AdB5D_ Ir
new ImprovedMergeSort(), .l*]W!L]
new HeapSort() j~"X`:=
}; fh \<tnY
H#G~b""mY
public static String toString(int algorithm){ 11 .RG *
return name[algorithm-1]; HqU"iY>b
} 3;j?i<kM
}_M.-Xm
public static void sort(int[] data, int algorithm) { A{;b^IK
impl[algorithm-1].sort(data); ''wWw(2O
} r}QW!^F
;=6++Oq
public static interface Sort { 8@/]ki`>
public void sort(int[] data); v^[Ny0cM
} ,KIa+&vJW@
0ldde&!p
public static void swap(int[] data, int i, int j) { 8\y%J!b
int temp = data; `a2Oj@jP
data = data[j]; C>@~W(IE
data[j] = temp; g=[ F W@z
} qrNW\ME
} (^9q7)n