[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; [ []'U'
} 0^'A^
int i1=l; MV +R$
int i2=mid+1; ^kZfE"iE2
for(int cur=l;cur<=r;cur++){ "<o[X ?u
if(i1==mid+1) M S 3?#b
data[cur]=temp[i2++]; +Go(yS
else if(i2>r) :$k':0 n
data[cur]=temp[i1++]; .N2yn`
else if(temp[i1] data[cur]=temp[i1++]; HR)Dz~Obw
else 5\93-e
data[cur]=temp[i2++]; s2f95<B
} J)1:jieQ
} X-1<YG
",/3PT
} O@JgVdgf
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改进后的归并排序: &y` MDyXz
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package org.rut.util.algorithm.support; lv -z[
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import org.rut.util.algorithm.SortUtil; K&FGTS,
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/** [h>|6%sW
* @author treeroot <$\vL
* @since 2006-2-2 s ^NO(
* @version 1.0 l`lo5:w
*/ KrOoxrDcp
public class ImprovedMergeSort implements SortUtil.Sort { dw %aoe
&8'.Gwm}
private static final int THRESHOLD = 10; %Q]u_0P*
lfjY45=
/* XL[/)lX{
* (non-Javadoc) (vte8uQe
* bqugo
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) !0ly1T 9
*/ Y.I-hl1<r
public void sort(int[] data) { zJ{?'kp
int[] temp=new int[data.length]; 6o@}k9AN
mergeSort(data,temp,0,data.length-1); {\-rZb==F2
} !NWz
W{E22J}
private void mergeSort(int[] data, int[] temp, int l, int r) { ,#3}TDC
int i, j, k; IV{,'+hT
int mid = (l + r) / 2; y*2R#jTA
if (l == r) /dTy%hZC}
return; gfE<XrG
if ((mid - l) >= THRESHOLD) (;utiupW
mergeSort(data, temp, l, mid); d,=Kv
else /lAB
insertSort(data, l, mid - l + 1); ?pgdj|"a
if ((r - mid) > THRESHOLD) w:Ui_-4*>
mergeSort(data, temp, mid + 1, r); 5,=Yi$x
else TR!^wB<F
insertSort(data, mid + 1, r - mid); 1);$#Dlt k
7q bGA K
for (i = l; i <= mid; i++) { b *IJ +
temp = data; B{|g+c%
} /CpUq;^
for (j = 1; j <= r - mid; j++) { Gd0-}4S?
temp[r - j + 1] = data[j + mid]; gLv|Hu7
} `abQlBb*
int a = temp[l]; j]7|5mC78
int b = temp[r]; [vki^M5i|Z
for (i = l, j = r, k = l; k <= r; k++) { c>fLSf
if (a < b) { F-}-/N]o q
data[k] = temp[i++]; :LRR\v0HM
a = temp; TJ(PTB;
} else { _'&N01
data[k] = temp[j--]; Oq"(oNG@
b = temp[j]; j0J}d _
} ~82[pY
} o?\)!_Z|
} Ore$yI}!m
UnNvlkjq9
/** ]D^dQ%{
* @param data <*L=u;
* @param l 7L)1mB.
* @param i f@l6]z{.L
*/ ZK5(_qW&i
private void insertSort(int[] data, int start, int len) { 7t-j2 n`<
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); /nXp5g^6(
} &{QB}r
} &SS"A*xg
} Lm+!/e
} 8?] :>
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堆排序： Z&8 7Aj
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package org.rut.util.algorithm.support; xO'I*)
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import org.rut.util.algorithm.SortUtil; E#"QaI8`
\C.%S +u
/** 1A^iUC5)
* @author treeroot i} 96,{
* @since 2006-2-2 P8NKpO\
* @version 1.0 \3K6NA!L
*/ a?'3
public class HeapSort implements SortUtil.Sort{ 5A1oZ+C#
2rHw5Wn]~
/* (non-Javadoc) Wu)ATs}
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Sp)KtMV
*/ FD(zj^*
public void sort(int[] data) { 6QdNGpN
MaxHeap h=new MaxHeap(); aKs!*uo0H
h.init(data); FtN1ZZ"<*
for(int i=0;i h.remove(); []Cvma1\
System.arraycopy(h.queue,1,data,0,data.length); 6h>8^l
} \Ekez~k{`
Qu]0BVIe
private static class MaxHeap{ z.16%@R
H%7V)"
void init(int[] data){ )hk=wu6
this.queue=new int[data.length+1]; b{)('C$
for(int i=0;i queue[++size]=data; TI}H(XL(
fixUp(size); [rqe;00]
} qx 3.oU
} k/l@P
6A M,1
private int size=0; T(+F6d=1
V5rnI\:7
private int[] queue; ^7q=E@[e
!mBsDn(J
public int get() { X[k-J\
return queue[1]; A(_AOoA'
} Lhl)pP17
a#H=dIj
public void remove() { Ary$,3X2
SortUtil.swap(queue,1,size--); nR/; uTTz
fixDown(1); ,r5<v_
} D{o1G?A
file://fixdown d_J?i]AP|'
private void fixDown(int k) { iMx+y5O
int j; f[7'kv5S
while ((j = k << 1) <= size) { t^?8Di\
if (j < size %26amp;%26amp; queue[j] j++; E E?v~6"&
if (queue[k]>queue[j]) file://不用交换 A`(p6 H"s
break; V$ 38
SortUtil.swap(queue,j,k); *wt yyP@
k = j; q`1t*<sk
} 7qE V5!
} qNHS 1
private void fixUp(int k) { w GZ(bKyO
while (k > 1) { =\4w" /Y
int j = k >> 1; 7g ]]>
if (queue[j]>queue[k]) ulfpop*2
break; .u7d
SortUtil.swap(queue,j,k); >|0yH9af
k = j; N)Qj^bD!
} ,b>cy&ut
} e"r'z n
UQ|0Aqwq
} PL~k `L
>&^w\"'
} :Tuy]]k
gZM{]GQ
SortUtil： Y@eHp-[
H[@}ri<
package org.rut.util.algorithm; R'dF<&Kj|
3JW9G04.
import org.rut.util.algorithm.support.BubbleSort; fH`1dU
import org.rut.util.algorithm.support.HeapSort; C*Ws6s>+z
import org.rut.util.algorithm.support.ImprovedMergeSort; #a#~YSnG
import org.rut.util.algorithm.support.ImprovedQuickSort; "EEE09~l\
import org.rut.util.algorithm.support.InsertSort; b]RCe^E1
import org.rut.util.algorithm.support.MergeSort; 344,mnAd
import org.rut.util.algorithm.support.QuickSort; j,/o0k,
import org.rut.util.algorithm.support.SelectionSort; W\.f:"2qr
import org.rut.util.algorithm.support.ShellSort; /<:9NP'^
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/** H'gPGOd
* @author treeroot lG#&Pv>-
* @since 2006-2-2 K'?ab 0
* @version 1.0 bG^eP:r
*/ _?G\^^
public class SortUtil { D{N1.rSxv
public final static int INSERT = 1; a]X6)6
public final static int BUBBLE = 2; eBU\&z[
public final static int SELECTION = 3; .6O>P2m]a_
public final static int SHELL = 4; Va=0R
public final static int QUICK = 5; yWzvE:!)
public final static int IMPROVED_QUICK = 6; 83R"!w18
public final static int MERGE = 7; @Jvw"=
public final static int IMPROVED_MERGE = 8; QQ2xNNF[
public final static int HEAP = 9; ^|\ *i
KD,b.s
public static void sort(int[] data) { :@:R4Ac
sort(data, IMPROVED_QUICK); =m}{g/Bk
} AL|fL
private static String[] name={ Fg#*rzA
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 0RoI`>j'
}; PtgUo,P
SF_kap%JM
private static Sort[] impl=new Sort[]{ ; UrwK
new InsertSort(), DVSYH{U4
new BubbleSort(), SNK+U"Q
new SelectionSort(), 2#+@bk>^{
new ShellSort(), xmiF!R
new QuickSort(), R63"j\0
new ImprovedQuickSort(), Y}1|/6eJ
new MergeSort(), &OI=rvDmo
new ImprovedMergeSort(), .\U+`>4av
new HeapSort() _"WQi}Mm
}; `n^jU92
qk_ s"}sS
public static String toString(int algorithm){ bO2$0!=I
return name[algorithm-1]; ?WAlW,H>
} $%1[<}<
Q8:u1$}
public static void sort(int[] data, int algorithm) { U +mx@C_
impl[algorithm-1].sort(data); ' J-(v
} _|A)ueY
Z]SCIU @+
public static interface Sort { Nm,vE7M
public void sort(int[] data); <[~x]-
} Hlz4f+#I
+!_^MBkk
public static void swap(int[] data, int i, int j) { ;U20g:K
int temp = data; Q 5@~0
data = data[j]; W{-N,?z
data[j] = temp; f2{4Y)
} }WCz*v1Wq
} 2o\\qEYg