[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; Fx2 KRxk
} CdlE"Ye
int i1=l; "{105&c\
int i2=mid+1; gN$.2+:
for(int cur=l;cur<=r;cur++){ >Jt,TMMlt
if(i1==mid+1) 6|wiZw
data[cur]=temp[i2++]; /1ooOq]
else if(i2>r) z8{kwz
data[cur]=temp[i1++]; trnjOm
else if(temp[i1] data[cur]=temp[i1++]; 8<t6_* f
else Pe8WBr;`
data[cur]=temp[i2++]; xCFk1%qf
} R}c,ahd
} DvHcT]l>5
^;@q^b)ZP
} 9KRHo%m
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改进后的归并排序: =($RT
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package org.rut.util.algorithm.support; x$d3fsEE
)n}Wb+2I
import org.rut.util.algorithm.SortUtil; A\iDK10Q$
kLQPa[u4
/** vpcx 1t<
* @author treeroot rM#jxAb
* @since 2006-2-2 K@Q_q/(%;
* @version 1.0 H_m(7@=
*/ ]c]rIOTN
public class ImprovedMergeSort implements SortUtil.Sort { T`7;Rl'Q
/~NsHStn
private static final int THRESHOLD = 10; i`)bn1Xm
35B G&;C
/* `G&W%CHB
* (non-Javadoc) Er^ijh,
* r/'9@oM
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) zJWBovT/
*/ 0'*whhH
public void sort(int[] data) { ]4-lrI1#
int[] temp=new int[data.length]; ce th)Xm
mergeSort(data,temp,0,data.length-1); BM!\U 6
} G[n^SEY!
/uS(Z-@
private void mergeSort(int[] data, int[] temp, int l, int r) { e}yoy+9
int i, j, k; r,X5@/
int mid = (l + r) / 2; z=:<]j#=
if (l == r) JUXIE y^
return; u[9i>7}9
if ((mid - l) >= THRESHOLD) [~9rp]<
mergeSort(data, temp, l, mid); j9Ptd$Uj
else @-nCK Yj
insertSort(data, l, mid - l + 1); &M(=#pq9
if ((r - mid) > THRESHOLD) :L#t?~
mergeSort(data, temp, mid + 1, r); 3IQ)%EN
else H7n5k,
insertSort(data, mid + 1, r - mid); [T#5$J
WV}<6r$e
for (i = l; i <= mid; i++) { 5_Yl!=
temp = data; O^ZOc0<
} 4of3#M
for (j = 1; j <= r - mid; j++) { Ac;rMwXk#
temp[r - j + 1] = data[j + mid]; qOYCQ
} rStfluPL
int a = temp[l]; l[lUmE
int b = temp[r]; yPrp:%PS
for (i = l, j = r, k = l; k <= r; k++) { UOHU1.3$T
if (a < b) { rU<NHFGj4
data[k] = temp[i++]; s''?: +
a = temp; :Y/i%#*1
} else { :=vB|Ch:~
data[k] = temp[j--]; HSGM&!5mW
b = temp[j]; c=]qUhnH
} w6DK&@w`'/
} y%)5r}S^
} .4Ob?ZS(
>ch{u{i6
/** v9R#=m/=
* @param data Fq/?0B8
* @param l wEL$QOu$
* @param i So; ;
*/ hO^8CA,5
private void insertSort(int[] data, int start, int len) { m<)0XE6w
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); k_%2Ok
} oR (hL4Dc
} v(D{_
} AujvKQ(
} N<o3pX2i]
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堆排序： vWY}+#
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package org.rut.util.algorithm.support; i0DYdUj
wjh[}rTV*
import org.rut.util.algorithm.SortUtil; Nw ;BhBt
EeGP E
/** ModwJ w
* @author treeroot c#sPM!!
* @since 2006-2-2 z3+y|nx!
* @version 1.0 AY4ZU CqI
*/ Q!K@
public class HeapSort implements SortUtil.Sort{ -5,QrMM<
9n{tbabJ
/* (non-Javadoc) hZ2!UW4'
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) F{}mlQg
*/ 3Tze`Q 9
public void sort(int[] data) { nN" Y~W^k
MaxHeap h=new MaxHeap(); q !\Ht2$b
h.init(data); d%_v eVIe
for(int i=0;i h.remove(); ].53t"*
System.arraycopy(h.queue,1,data,0,data.length); (pM5B8U
} S|!)_RL
Ug>yTc_(7
private static class MaxHeap{ Z7RGOZQ}G
`:cnu;
void init(int[] data){ DpjiE/*
this.queue=new int[data.length+1]; }[ LME Z
for(int i=0;i queue[++size]=data; tWR>I$O8F
fixUp(size); >Ia{ZbQV
} H~%HTl
} &ywAzGV{s
Nq'Cuwsp
private int size=0; DQO~<E6c
nIdB,
private int[] queue; V5sH:A7GJ
hJY= )
public int get() { ceBu i8a |
return queue[1]; /Am,5X.
} `|K30hRp:
JU+Uzp
public void remove() { {^>dQ+Sx7
SortUtil.swap(queue,1,size--); C9zQ{G
fixDown(1); 8 tMfh
} QA?e2kd
file://fixdown ;;rEv5 /
private void fixDown(int k) { f)w>V3~w,
int j; sv`+?hjG
while ((j = k << 1) <= size) { S@i*+&Ot
if (j < size %26amp;%26amp; queue[j] j++; u&Q2/Y
if (queue[k]>queue[j]) file://不用交换 ol]"r5#Q_H
break; v`3q0,,
SortUtil.swap(queue,j,k); %^){Z,}M}
k = j; P0O5CaR
} )X-b|D4O
} g4USKJ19.
private void fixUp(int k) { r0kJx$f
while (k > 1) { :*|%g
int j = k >> 1; 2u 8z>/G
if (queue[j]>queue[k]) I^|6gaP|6
break; fp!Ba
SortUtil.swap(queue,j,k); ozN#LIM>P
k = j; R2{y1b$l
} *Pj[r
} F<SMU4]YdG
?K,xxH
} pvCn+y/U;
"@: b'm
} r.1/*i
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SortUtil： h+EG) <
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package org.rut.util.algorithm; ZL[~[
VZ"W_U,
import org.rut.util.algorithm.support.BubbleSort; } :U'aa
import org.rut.util.algorithm.support.HeapSort; eytd@-7uX
import org.rut.util.algorithm.support.ImprovedMergeSort; b37F;"G
import org.rut.util.algorithm.support.ImprovedQuickSort; #B7_5y^
import org.rut.util.algorithm.support.InsertSort; lx9tUTaus/
import org.rut.util.algorithm.support.MergeSort; <aps)vF
import org.rut.util.algorithm.support.QuickSort; r;:5P%:
import org.rut.util.algorithm.support.SelectionSort; !DsKa6Zj
import org.rut.util.algorithm.support.ShellSort; }^r=(
xb/L AlJ
/** E__^>=
* @author treeroot UeNa
* @since 2006-2-2 SF$'$6x}
* @version 1.0 H}m%=?y@
*/ E}eu]2=nU}
public class SortUtil { y9W6e"
public final static int INSERT = 1; yVA<-PlS<
public final static int BUBBLE = 2; tMM*m
public final static int SELECTION = 3; 0I6[`*|SX
public final static int SHELL = 4; CZ2&9Vb9I
public final static int QUICK = 5; S!!i
public final static int IMPROVED_QUICK = 6; EHpIbj;n
public final static int MERGE = 7; 951"0S`Lo
public final static int IMPROVED_MERGE = 8; cRYnQ{$'
public final static int HEAP = 9; CBaU$`5
Gvg)@VNr
public static void sort(int[] data) { J9s4lsea
sort(data, IMPROVED_QUICK); vY|{CBGbd
} wX(h]X"q
private static String[] name={ paFiuQ
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" nNuv 0
}; Ay?;0w0
T}DP35dBzE
private static Sort[] impl=new Sort[]{ r9!jIkILz
new InsertSort(), E"LSM]^^<f
new BubbleSort(), 3Z?"M
new SelectionSort(), &)F8i#M
new ShellSort(), OcR6\t'
new QuickSort(), r!Ujy .R
new ImprovedQuickSort(), 6ww4ZH?j
new MergeSort(), k.Tu#7
new ImprovedMergeSort(), P%#WeQ+
new HeapSort() Yphru"\$
}; 1rs`|iX5
nNbOq[
public static String toString(int algorithm){ ;3ZHm*xJx
return name[algorithm-1]; 5?-cP?|.9
} }bj dK
]ZJu
public static void sort(int[] data, int algorithm) { E]zTd$v6
impl[algorithm-1].sort(data); >uMj}<g#Z?
} n_G< /8
Y@)iPK@z
public static interface Sort { _`6fGu& W
public void sort(int[] data); C.SGm
} C@!C='b,
dWR0tS6vR`
public static void swap(int[] data, int i, int j) { ;dXQB>Za
int temp = data; 5AmYrXZ
data = data[j]; `[T|Ck5
data[j] = temp; N}ur0 'J0
} !Jh/M^
} k-;%/:Om