[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; [0e}%!%M
} L);kwx7{LW
int i1=l; /TgG^|
int i2=mid+1; q,a|lH
for(int cur=l;cur<=r;cur++){ VFMg$qv|_
if(i1==mid+1) cx8H.L
data[cur]=temp[i2++]; uU]4)Hp
else if(i2>r) =p)Wxk
data[cur]=temp[i1++]; Qy@r&
else if(temp[i1] data[cur]=temp[i1++]; )#dP:
else ^25[%aJI
data[cur]=temp[i2++]; 93d ht
} B6b {hsO
} xe6 2gaT
n300kpv
} nNFZ77lg
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改进后的归并排序: WVf>>E^1
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package org.rut.util.algorithm.support; AjZ@hid
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import org.rut.util.algorithm.SortUtil; i=<N4Vx
b&Sk./ J6
/** jibrSz
* @author treeroot ^8nK x<&5
* @since 2006-2-2 ,wlh0;,
* @version 1.0 )S|}de/a2
*/ !f\y3p*j
public class ImprovedMergeSort implements SortUtil.Sort { E0}jEl/{
bd2"k;H<o
private static final int THRESHOLD = 10; `1KZ14K
;o#R(m@Lx
/* eRa1eRgP
* (non-Javadoc) '7{0k{
* !R WX1Z
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) yl%F}kBR
*/ 56m|gZcC
public void sort(int[] data) { $vdGkz@6
int[] temp=new int[data.length]; Z;W`deA
mergeSort(data,temp,0,data.length-1); fmvv q1G&
} '+|{4-V
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private void mergeSort(int[] data, int[] temp, int l, int r) { vF;%#P
int i, j, k; ;ePmN|rq;
int mid = (l + r) / 2; *"Ipu"G5?
if (l == r) dQt*/]{q
return; LRv-q{jP;
if ((mid - l) >= THRESHOLD) XH0R:+s
mergeSort(data, temp, l, mid); ?/~7\ '|Z
else xU^Flw,4
insertSort(data, l, mid - l + 1); uM0z%z5b
if ((r - mid) > THRESHOLD) F[c;iM(^
mergeSort(data, temp, mid + 1, r); n}yqpW!%n
else q"A(l
insertSort(data, mid + 1, r - mid); x1$tS#lS
mD)_quz.sk
for (i = l; i <= mid; i++) { oZ@_o3VG
temp = data; Y2w 9]:J
} M*E4:A9_M
for (j = 1; j <= r - mid; j++) { r$6z{Na\[
temp[r - j + 1] = data[j + mid]; #oi4!%*M
} fdCsn:
int a = temp[l]; .c+RFX@0
int b = temp[r]; LeY\{w
for (i = l, j = r, k = l; k <= r; k++) { HT5G HkT
if (a < b) { Z| +/Wl-h
data[k] = temp[i++]; ]RQQg,|D
a = temp; }yU,_:
} else { /"Om-DK%
data[k] = temp[j--]; h8O[xca/~
b = temp[j]; >0SF79-RE
} w'.ny<Pe
} Vl?R?K=`~J
} OlFls 8#>
kN;l@>
/** *Rj>// A
* @param data ^ow[XEB%
* @param l X{ZBS^M
* @param i >GgX-SZ%
*/ r 06}@7
private void insertSort(int[] data, int start, int len) { X1i6CEa<
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); |jaUVE_2[
} &|26x >
} U\ y?P:yy
} Om{[ <tL
} >NW /0'/
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堆排序： 3`k1
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package org.rut.util.algorithm.support; _pKW($\
-";'l@D=
import org.rut.util.algorithm.SortUtil; VA)3=82n
M:nXn7)+
/** |z|5j!Nfh
* @author treeroot l0u6nGkh
* @since 2006-2-2 +vLuzM-
* @version 1.0 9 YU7R)
*/ 7 4aap2^
public class HeapSort implements SortUtil.Sort{ $[[6N0}*:
or~o'
/* (non-Javadoc) B.K"1o
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) VE6T&fz`
*/ yK0Q,
public void sort(int[] data) { EUe2<G
MaxHeap h=new MaxHeap(); D_9&=aa'
h.init(data); =6j 5,
for(int i=0;i h.remove(); 91%+Bf()J6
System.arraycopy(h.queue,1,data,0,data.length); J~DP*}~XK
} 7~eo^/PbS
-^$CGRE6A
private static class MaxHeap{ bP Er+?fu
]<4Yor}t{;
void init(int[] data){ /[GOs*{zB
this.queue=new int[data.length+1]; f3V&i)w(
for(int i=0;i queue[++size]=data; sxO_K^eD
fixUp(size); rNqJL_!
} nV McHN
} HQaKG4Z
zY\v|l<T
private int size=0; Q]w;o&eo
fmA&1u/xMs
private int[] queue; ,^,Vq]$3
^;NM'Z
public int get() { 1B6Go
return queue[1]; +fAAkO*GP
} . %tc7`k8
2#*Bw=
public void remove() { JQsS=m7Et
SortUtil.swap(queue,1,size--); o]MQ)\r
fixDown(1); }%y_LcL
} xh@H@Q\
file://fixdown >?b/_O
private void fixDown(int k) { c"H4/,F
int j; A!<R?
while ((j = k << 1) <= size) { *AGC[w}/
if (j < size %26amp;%26amp; queue[j] j++; H4KwbTT"+
if (queue[k]>queue[j]) file://不用交换 E[nWB"pxE
break; =9YyUAJZ
SortUtil.swap(queue,j,k); lV`y6{o#T
k = j; !o:RIwS3
} vp4!p~C{
} *0l^/jqn:
private void fixUp(int k) { ~{Tus.jk
while (k > 1) { 0FjSa\ZH
int j = k >> 1; <3 AkF# C9
if (queue[j]>queue[k]) ')bx1gc(?
break; o&;+!Si@T
SortUtil.swap(queue,j,k); {NKDmeg:D
k = j; y= cBpC
} [_L:.,]g8
} MrLDe{^C2
Y$Js5K@F
} @a>+r1
ECg/ge2
} uMPJ
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SortUtil： > g8;x#
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package org.rut.util.algorithm; Si6%6rAhj
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import org.rut.util.algorithm.support.BubbleSort; kd|@.
import org.rut.util.algorithm.support.HeapSort; k2<VUeW5
import org.rut.util.algorithm.support.ImprovedMergeSort; \ zhT1#O
import org.rut.util.algorithm.support.ImprovedQuickSort; H]UM2.
import org.rut.util.algorithm.support.InsertSort; x~j%
import org.rut.util.algorithm.support.MergeSort; lx U}HM
import org.rut.util.algorithm.support.QuickSort; }v0oFY$u`H
import org.rut.util.algorithm.support.SelectionSort; c(ZkK
import org.rut.util.algorithm.support.ShellSort; ( y2%G=.j
[*vk&
/** B:qZh$YN
* @author treeroot aMZ6C <N
* @since 2006-2-2 F{]dq/{
* @version 1.0 T9RR. ng
*/ /ta-jOcRH&
public class SortUtil { Q++lgVh)E
public final static int INSERT = 1; FFR_1Vf
public final static int BUBBLE = 2; K$#(\-M
public final static int SELECTION = 3; )3'/g`c
public final static int SHELL = 4; w;}P<K
public final static int QUICK = 5; IA$:r@QNx8
public final static int IMPROVED_QUICK = 6; }j+ZF'#
public final static int MERGE = 7; iZgv VH
public final static int IMPROVED_MERGE = 8; BGLJ>zkq
public final static int HEAP = 9; `cy_@Z5A
+7^%fX;3pW
public static void sort(int[] data) { P9G c)$6{p
sort(data, IMPROVED_QUICK); a&.8*|w3
} |"5NI'X?
private static String[] name={ eDX{}Dq(
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 6n
}; UXDd8OJL
(t>BO`,
private static Sort[] impl=new Sort[]{ jNaK]
new InsertSort(), rVt6tx
new BubbleSort(), S,n*1&ogj
new SelectionSort(), G9N6iKP!
new ShellSort(), o" &7$pAh
new QuickSort(), XlV#)JX
new ImprovedQuickSort(), lDCoYX_
new MergeSort(), "sUL"i
new ImprovedMergeSort(), w%S\)wjS
new HeapSort() [,8@oM#
}; >y(;k|-$
zp!{u{
public static String toString(int algorithm){ v'`C16&^]
return name[algorithm-1]; deQ0)A 4g
} @4sv(HyDY
(05/}PhB`
public static void sort(int[] data, int algorithm) { 2%. A{!
impl[algorithm-1].sort(data); pu0IhDMn
} 3-lJ]7OT
TlQ#0_as[
public static interface Sort { U;`N:~|p#
public void sort(int[] data); pzg|?U
} "n}J6
)ra_`Qdcf
public static void swap(int[] data, int i, int j) { QO[!
int temp = data; rt_%_f>qd
data = data[j]; |XtN\9V.
data[j] = temp; c/^} =t(
} #i%it
} CDK0 $W n