[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; }8H_^G8
} pzkl;"gK
int i1=l; >";I3S-t
int i2=mid+1; o09)esy
for(int cur=l;cur<=r;cur++){ \O*8%
if(i1==mid+1) XI4le=^EM
data[cur]=temp[i2++]; *]L(,_:"
else if(i2>r) )#^5$5
data[cur]=temp[i1++]; !=C74$TH
else if(temp[i1] data[cur]=temp[i1++]; 3#=%2\
else wt8?@lJ"/
data[cur]=temp[i2++]; q9cN2|:
} \Vc-W|e
} @ m' zm:
xJ2DkZ
} W@X/Z8.(
v;S_7#
改进后的归并排序: q%G"P*g$(
k<bA\5K
package org.rut.util.algorithm.support; ?3f-"K_r
f!|$!r*q
import org.rut.util.algorithm.SortUtil; 3Pj#k|(f[0
7P&O{tl(
/** -E*VF{IG1
* @author treeroot kOu C@~,
* @since 2006-2-2 \`FpBE_e)
* @version 1.0 KdBE[A-1^M
*/ EWcqMD]4u
public class ImprovedMergeSort implements SortUtil.Sort { x]e&G!|
Bl\/q83(
private static final int THRESHOLD = 10; B)q 5m y
7GY3_`
/* Ne 2tfiI`
* (non-Javadoc) Thlqe?
* N ,8^AUJ3&
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) _LVi}mM
*/ rc_K|Df
public void sort(int[] data) { bgi B*`z
int[] temp=new int[data.length]; 6RA4@bIG
mergeSort(data,temp,0,data.length-1); Ys+2/>!
} y4jJ&
/o$C=fDF
private void mergeSort(int[] data, int[] temp, int l, int r) { riy@n<Z4
int i, j, k; ~>j5z&:&
int mid = (l + r) / 2; n86=1G:%
if (l == r) ZQY]c
return; W%6Y?pf)z
if ((mid - l) >= THRESHOLD) nIckI!U#D
mergeSort(data, temp, l, mid); %%7~<=rk
else 2YS1%<-g*
insertSort(data, l, mid - l + 1); T>$S&U
if ((r - mid) > THRESHOLD) GKT^rc-YT-
mergeSort(data, temp, mid + 1, r); nm8XHk]
else t08E 2sI
insertSort(data, mid + 1, r - mid); u3[A~V|0=
)BJZ{E*
for (i = l; i <= mid; i++) { X:0-FCT;\
temp = data; +!@@55I-
} GLS`1!
for (j = 1; j <= r - mid; j++) { M5C%(sQ$
temp[r - j + 1] = data[j + mid]; '}F=U(!
} j9voeV|7
int a = temp[l]; >EVY,
int b = temp[r]; pA~eGar_J
for (i = l, j = r, k = l; k <= r; k++) { +\Zr\fOe|%
if (a < b) { 4s <|8
data[k] = temp[i++]; JBvMe H5
a = temp; km 0LLYG
} else { =!V-V}KK-
data[k] = temp[j--]; 9fj8r3 F#
b = temp[j]; K6..N\7
} OYbgt4
} r_p4pxs
} 9i8 ~
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/** y}.?`/Q#
* @param data zfm-vU
* @param l 0q!
* @param i ?'jRUfl
*/ o 9?#;B$
private void insertSort(int[] data, int start, int len) { `P(Otr[6
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); v\#1&</qd^
} P {8d.
} -9X#+-
} S.E'fc1
} &_Vd
Z1&<-T_
堆排序： u/,ng&!
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package org.rut.util.algorithm.support; HOY@<'
fxcCz 5
import org.rut.util.algorithm.SortUtil; '^6jRI,
i*3*)ly
/** (Y[q2b
* @author treeroot ;_TPJy
* @since 2006-2-2 vIK+18v7
* @version 1.0 k~|5TO
*/ /Y7YyjMi
public class HeapSort implements SortUtil.Sort{ ~4}'R_
8b!-2d:*
/* (non-Javadoc) LOPw0@
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) :krdG%r
*/ m7n8{J1O2
public void sort(int[] data) { EPn0ZwnS:M
MaxHeap h=new MaxHeap(); Ra~|;( %d
h.init(data); Y!0ZwwW
for(int i=0;i h.remove(); k04CSzE"%
System.arraycopy(h.queue,1,data,0,data.length); eGEeWJ}[$
} M{
t:N3k ;k
private static class MaxHeap{ FTk`Mq
D'UYHc{
void init(int[] data){ `yXJaTbo
this.queue=new int[data.length+1]; J;mvD^`g
for(int i=0;i queue[++size]=data; j_#oP
fixUp(size); xBevf&tP
} /z(;1$Ld6{
} tAxS1<T4
TM?RH{(r
private int size=0; F8T.}qI
4^>FN"Ve`B
private int[] queue; ' Akt5q
?_<14%r;
public int get() { !IUH 5
return queue[1]; >AUj4d
} u@ psVt
s${|A=
public void remove() { Scfk]DT
SortUtil.swap(queue,1,size--); 6Y 4I $[
fixDown(1); k>aWI
} @x4IxGlUs
file://fixdown D?Y j5eOa
private void fixDown(int k) { A]WR-0Z7
int j; ;H%T5$:trP
while ((j = k << 1) <= size) { _(&XqEX
if (j < size %26amp;%26amp; queue[j] j++; \'}? j-8
if (queue[k]>queue[j]) file://不用交换 {Bd 0
break; 0DIXd*oj&
SortUtil.swap(queue,j,k); B?|url6h
k = j; .on}F>3k$
} {rE]y C^
} + NpHk
private void fixUp(int k) { Oj`I=O6
while (k > 1) { F/(z3Kf
int j = k >> 1; O&(@Ka
if (queue[j]>queue[k]) sfuA {c'v
break; JS:AHJSz
SortUtil.swap(queue,j,k); X7~AqG
k = j; _+?v'#
} F~O}@e{
} due'c!wW
Q&d"uLsx
} <:gNx%R
m-h+UKt
} {;0+N -U
]!=,8dY
SortUtil： 0**.:K<i
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package org.rut.util.algorithm; D$OUy}[2`.
8E:d!?<^&I
import org.rut.util.algorithm.support.BubbleSort; {YoK63b$
import org.rut.util.algorithm.support.HeapSort; q=+AN</
import org.rut.util.algorithm.support.ImprovedMergeSort; \as^z!<
import org.rut.util.algorithm.support.ImprovedQuickSort; <8_~60
import org.rut.util.algorithm.support.InsertSort; j1Q"s(
import org.rut.util.algorithm.support.MergeSort; ^]A,Q%1q^
import org.rut.util.algorithm.support.QuickSort; $^XCI%DH
import org.rut.util.algorithm.support.SelectionSort; {G^f/%
import org.rut.util.algorithm.support.ShellSort; 3%'Y):
&|8R4l C|
/** )?zlhsu}1;
* @author treeroot <Jwx|
* @since 2006-2-2 >I^_kBa
* @version 1.0 =SEgv;#KZ~
*/ mO1r~-~AJ
public class SortUtil { {;T7Kg.C
public final static int INSERT = 1; ~$FgiW
public final static int BUBBLE = 2; 6$k"B/k
public final static int SELECTION = 3; k9|8@3(h
public final static int SHELL = 4; y))) {X
public final static int QUICK = 5; BA 9c-Ay
public final static int IMPROVED_QUICK = 6; ?-HLP%C('
public final static int MERGE = 7; $QB~ x{v@n
public final static int IMPROVED_MERGE = 8; `[=3_
public final static int HEAP = 9; ]3/_?n-"`
zP(UaSXz/
public static void sort(int[] data) { d2!A32m
sort(data, IMPROVED_QUICK); B{^ojV;]m
} G7yR&x^
private static String[] name={ [G=+f6 a
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" ^jiYcg@_[
}; E#L"*vh
$ZEwz;HNo
private static Sort[] impl=new Sort[]{ :w+2L4lGs
new InsertSort(), ]LE
new BubbleSort(), 'Rg6JW\
new SelectionSort(), "Om4P|
new ShellSort(), K~I%"r|l
new QuickSort(), c%bGVRhE
new ImprovedQuickSort(), (*CGZDg
new MergeSort(), w.2[Xx~
new ImprovedMergeSort(), 9jC>OZ0s
new HeapSort() MS~|F^g
}; %9qG|A,cA
F6$QEiDu@
public static String toString(int algorithm){ A3Lfh6O
return name[algorithm-1]; jZ5 mpYUO
} K\2UwX
;:/<XfZ
public static void sort(int[] data, int algorithm) { !pMp n%r<]
impl[algorithm-1].sort(data); k ='c*`IE
} :qQpBr$
G+$A|'<`z
public static interface Sort { 13X\PO'9
public void sort(int[] data); l^$8;$Rq
} PI5a'k0F
7 z#Xf
public static void swap(int[] data, int i, int j) { ofu {g
int temp = data; n:#gKR-J
data = data[j]; Q#2gjR r
data[j] = temp; ox2?d<dC6
} (i"@{[IP
} WN+D}z]