[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; 1+y&n?
} \F1nEj
int i1=l; cgz'6q'T
int i2=mid+1; }PED#Uv
for(int cur=l;cur<=r;cur++){ ^<y$+HcH
if(i1==mid+1) < "~k8:=4
data[cur]=temp[i2++]; ~-W.yg6D{
else if(i2>r) PU-~7h+$
data[cur]=temp[i1++]; l_,8_u7G
else if(temp[i1] data[cur]=temp[i1++]; DU 8)c$
else K9w24Oka
data[cur]=temp[i2++]; +S/8{2%?DG
} V8n}"
} p%3';7W\
#( kT
} fcw\`.
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改进后的归并排序: QQ!,W':
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package org.rut.util.algorithm.support; ][?GJ"O+U
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import org.rut.util.algorithm.SortUtil; TzK?bbgr!
2B!nLLCp+
/** >`oO(d}n[0
* @author treeroot BwEL\*$g
* @since 2006-2-2 8\I(a]kM`
* @version 1.0 N#[/h96F
*/ JBoo7a1
public class ImprovedMergeSort implements SortUtil.Sort { <n6/np!
)3G?5 OTS
private static final int THRESHOLD = 10; A@DIq/^xM
VKR6i
/* YO,GZD`-o
* (non-Javadoc) koqH~>ZtD
* E&[ox[g{
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ||!k 3t#<
*/ ^8MgNVoJ)
public void sort(int[] data) { |=h>3Z=r!
int[] temp=new int[data.length]; _')KDy7
mergeSort(data,temp,0,data.length-1); [fW:%!Y'
} 4e%SF|(Y'h
4cV(Z-\
private void mergeSort(int[] data, int[] temp, int l, int r) { *S=v1 s/
int i, j, k; ~z< ? Wh
int mid = (l + r) / 2; .0a$E`V=D
if (l == r) #vDe/o+=
return; Q7DkhKT
if ((mid - l) >= THRESHOLD) l7x%G@1#~W
mergeSort(data, temp, l, mid); |20p#]0E+
else LXK+WB/s
insertSort(data, l, mid - l + 1); Sk1yend4
if ((r - mid) > THRESHOLD) V'6%G:?0a
mergeSort(data, temp, mid + 1, r); UhEnW8^bz1
else wEkW=
insertSort(data, mid + 1, r - mid); 3b[_0
(JF\%Yj/
for (i = l; i <= mid; i++) { QTLOP~^
temp = data; 54'z"S:W
} Ur@'X-
for (j = 1; j <= r - mid; j++) { FD`V39##
temp[r - j + 1] = data[j + mid]; IzL yn
} TnKe"TA|9
int a = temp[l]; Zd5frc$
int b = temp[r]; zCco/]h
for (i = l, j = r, k = l; k <= r; k++) { Zd~Z`B} &
if (a < b) { 9xWeVlfQ
data[k] = temp[i++]; 1$ l3-x
a = temp; `Y(/G"]
} else { ChBZGuO:
data[k] = temp[j--]; XS1>ti|<
b = temp[j]; /sYD+*a
} M&>Z[o
} ~5JXY5*o
} E8V,".!+E
g!K(xhEO
/** SYC_=X
* @param data +1cK (Si
* @param l $)\ocsO
* @param i -Ol/r=/&
*/ aIm\tPbb
private void insertSort(int[] data, int start, int len) { 2?m'Dy'JE
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); NDI|;
} ,ur_n7+LH
} 1YS{; y[o
} g.,IQ4o
} ,7/N=mz
M/#<=XhA
堆排序： [1Vh3~>J6
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package org.rut.util.algorithm.support; ~s88JLw%&u
H(""So7L
import org.rut.util.algorithm.SortUtil; .=K@M"5&
G8<,\mg+
/** T$RZRZo
* @author treeroot .ipYZg'V
* @since 2006-2-2 fc&4e:Ve
* @version 1.0 5$jKw\FF=
*/ &|',o ?'F
public class HeapSort implements SortUtil.Sort{ ^TDHPBlG
cl{;%4$9
/* (non-Javadoc) }b~ZpUL!
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) =m1B1St2
*/ >-]Y%O;}
public void sort(int[] data) { tTP"*Bb
MaxHeap h=new MaxHeap(); %pV/(/Q
h.init(data); n*'|7#;
for(int i=0;i h.remove(); v+Ooihxl
System.arraycopy(h.queue,1,data,0,data.length); zs7K :OlkA
} Pirc49c
4m%_#J{
private static class MaxHeap{ !v94FkS>
b^FB[tZ\x
void init(int[] data){ :~g=n&x
this.queue=new int[data.length+1]; 0h$23.
for(int i=0;i queue[++size]=data; mNs&*h}
fixUp(size); 7zy6`OP
} >D*L0snjV
} +]Ydf^rF
NbfV6$jo
private int size=0; -4"E]f
qM]eK\q 1
private int[] queue; up`!r;5-
{6A3?q
public int get() { &s\w: 9In
return queue[1]; :3u>%
} Eiwo==M
#=+d;RdlW
public void remove() { XG*Luc-v
SortUtil.swap(queue,1,size--); {bl^O
fixDown(1); rFdovfb
} R~;<}!Gtx
file://fixdown nKufVe
private void fixDown(int k) { p)Z$q2L
int j; g)2}`}
while ((j = k << 1) <= size) { =3l%ZL/
if (j < size %26amp;%26amp; queue[j] j++; "M1[@xog
if (queue[k]>queue[j]) file://不用交换 @/XA*9]l
break; fnwtD*``
SortUtil.swap(queue,j,k); F}.<x5I-;h
k = j; $^d,>hJi
} Xb3z<r
} L)J0TSh
private void fixUp(int k) { XkOsnI8n
while (k > 1) { d\D.l^
int j = k >> 1; ^q7 fN0"6
if (queue[j]>queue[k]) \h?C G_|]
break; yw$er?
SortUtil.swap(queue,j,k); }M * Oo
k = j; &+d>xy\^/
} ojUBa/
} j:\MrYt0H
i\2~yXw\
} Z6A*9m
]xfu@''
} Tf<1Z{9
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SortUtil： Hq3"OMGq
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package org.rut.util.algorithm; |Fm(
zT*EpIa+LS
import org.rut.util.algorithm.support.BubbleSort; pQ!NhzQ
import org.rut.util.algorithm.support.HeapSort; nB WVG
import org.rut.util.algorithm.support.ImprovedMergeSort; p,Qr9p3y
import org.rut.util.algorithm.support.ImprovedQuickSort; ab: yH ')
import org.rut.util.algorithm.support.InsertSort; z*"zXLC
import org.rut.util.algorithm.support.MergeSort; uL\ B[<:
import org.rut.util.algorithm.support.QuickSort; r|:i: ii
import org.rut.util.algorithm.support.SelectionSort; U;Y{=07a@
import org.rut.util.algorithm.support.ShellSort; #\_N-bVu
a4Fe MCvV9
/** S{7A3 x'B
* @author treeroot k$j>_U? P
* @since 2006-2-2 6DD"Asi+
* @version 1.0 nM>oG'm[n
*/ :]v%6i.
public class SortUtil { sjvlnnO
public final static int INSERT = 1; NVAt-u0LB
public final static int BUBBLE = 2; @~qlSU&
public final static int SELECTION = 3; n&jfJgD&g
public final static int SHELL = 4; *?VbN}g2
public final static int QUICK = 5; q okgu$2
public final static int IMPROVED_QUICK = 6; L Me{5H
public final static int MERGE = 7; z}&?^YU*)`
public final static int IMPROVED_MERGE = 8; D4$;jz,,
public final static int HEAP = 9; ?<STt 9
'%vb&a!.6
public static void sort(int[] data) { 5IE2&V
sort(data, IMPROVED_QUICK); tXV9+AJ
} d<r=f"
private static String[] name={ !ZJ"lm
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" B\G?dmo
}; }_vE lBh6$
BxS\"W
private static Sort[] impl=new Sort[]{ vd6Y'Zk|F6
new InsertSort(), 0GK<l
new BubbleSort(), <Wn={1Ts"
new SelectionSort(), 7F!_gj p
new ShellSort(), xT6&;,|`
new QuickSort(), yl0&|Ub
new ImprovedQuickSort(), y-w=4_W
new MergeSort(), e C?adCb
new ImprovedMergeSort(), ouL/tt_~
new HeapSort() L}T:Y).
}; f 0A0uU8y
mEyJ o|
public static String toString(int algorithm){ ]3uErnI
return name[algorithm-1]; Ne!F p
} mtSOygd
,u8)g;8s
public static void sort(int[] data, int algorithm) { G1=GzAd$5
impl[algorithm-1].sort(data); $T.we+u
} <csz4tL}P
BU(:6
public static interface Sort { ~za=yZo7(
public void sort(int[] data); ?mU 3foa
} OOA%NKV
7p}J]!Z
public static void swap(int[] data, int i, int j) { CZe0kH^:{
int temp = data; RY3ANEu+
data = data[j]; jT}3Zn
data[j] = temp; A[`c2v-hF
} QV,X> !Nz
} 'Alt+O_