[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; [tGAo/
} _) k=F=
int i1=l; Ox7v*[x'
int i2=mid+1; ~B;kFdcVXn
for(int cur=l;cur<=r;cur++){ |b7v(Hx
if(i1==mid+1) ~CIA6&
data[cur]=temp[i2++]; Tqz{{]%j~$
else if(i2>r) }R4%%)j(Vj
data[cur]=temp[i1++]; CG*eo!Nw
else if(temp[i1] data[cur]=temp[i1++]; DXu#07\
else T4dLuJl
data[cur]=temp[i2++]; {XH!`\
} [y-0w.V=oE
} 0h/gqlTK1
S L<P`H|
} }tA77Cm)45
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改进后的归并排序: d 4w+5H"u
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package org.rut.util.algorithm.support; nI7G"f[%r;
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import org.rut.util.algorithm.SortUtil; s ;EwAd(
12qX[39/
/** Z^ynw8k"
* @author treeroot T n.Cj5
* @since 2006-2-2 {R<0'JU
* @version 1.0 tmT/4Ia
*/ LA &W@
public class ImprovedMergeSort implements SortUtil.Sort { $I*ye+a*{q
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private static final int THRESHOLD = 10; 9RA~#S|(T
uqe{F+;8&
/* F]o&m::/K
* (non-Javadoc) JLgk?
* c1 aCN
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) #-vuY#gs
*/ _+Tq&,_:o
public void sort(int[] data) { ?pSb,kN}'
int[] temp=new int[data.length]; )H=}bqn
mergeSort(data,temp,0,data.length-1); OBrbWXp@
} qJV2x.!
;Z>u]uK4+
private void mergeSort(int[] data, int[] temp, int l, int r) { 12l-NWXf
int i, j, k; |NuX9!S
int mid = (l + r) / 2; -Pds7}F8
if (l == r) ZqT8G
return; cHqT1EY
if ((mid - l) >= THRESHOLD) U`YPzZp_
mergeSort(data, temp, l, mid); n-ZOe]3
else Jv_KZDOdk
insertSort(data, l, mid - l + 1); `y"(\1
if ((r - mid) > THRESHOLD) <zd_-Ysn
mergeSort(data, temp, mid + 1, r); $ZnLYuGb
else K>%}m,
insertSort(data, mid + 1, r - mid); 4}0DEH.Vx
2AYV9egZ
for (i = l; i <= mid; i++) { 3PRg/vD3
temp = data; \tv^],^`
} BY*{j&^
for (j = 1; j <= r - mid; j++) { kH;DAphk
temp[r - j + 1] = data[j + mid]; s?-@8.@
} 4Js2/s
int a = temp[l]; RLy2d'DS
int b = temp[r]; ~H<oqk:O-
for (i = l, j = r, k = l; k <= r; k++) { u.\FNa
if (a < b) { Hlh`d N
data[k] = temp[i++]; 6yn34'yw
a = temp; MTnW5W-r9
} else { L@mNfLK
data[k] = temp[j--]; O_v8R7 {
b = temp[j]; a7$]" T 7
} 6YErF|
} ]81t~t9LQ
} R_DstpsT
T[?wbYfW
/** W|2o^ V
* @param data p :v'"A}
* @param l %|"0p3
* @param i g?7I7W~?`
*/ 3t4i2]
private void insertSort(int[] data, int start, int len) { =D>,s)}o3;
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); c[IT?6J4
} 95XQ?%
} Oc,E\~
} pA%}CmrMq
} [TW?sW^0
"=0(a)01p:
堆排序： )7aUDsu>4
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package org.rut.util.algorithm.support; 9mmkFaBQ
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import org.rut.util.algorithm.SortUtil; N1',`L5
u# TNW.
/** -$ VP#%
* @author treeroot $q|-9B
* @since 2006-2-2 }OsAO
* @version 1.0 ?lPn{oB9"
*/ x]Pp|rHj
public class HeapSort implements SortUtil.Sort{ OGR2Y
G(3wI}
/* (non-Javadoc) &FpoMW
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) u\y$<
*/ =#Z+WD-E
public void sort(int[] data) { L-9AJk>V
MaxHeap h=new MaxHeap(); 94}y,\S~
h.init(data); 8}?wi[T
for(int i=0;i h.remove(); `DFo:w!k
System.arraycopy(h.queue,1,data,0,data.length); &}rmDx
} %MM)5MsB
vf@toYc[E
private static class MaxHeap{ @kPe/j/[1
dJ9v/k_
void init(int[] data){ 3Fg{?C_l
this.queue=new int[data.length+1]; jX;$g>P
for(int i=0;i queue[++size]=data; UrmnHc>}c
fixUp(size); :\]qB&
} 98rO]rg
} _B?Hw[cc
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private int size=0; .O&[9`"'
LL_@nvu}M
private int[] queue; )eVn1U2*z.
@x@wo9<Fc
public int get() { =lmelo#m&
return queue[1]; HLX#RQ
} Kw =RqF
RDOV+2K
public void remove() { #OwxxUeZ
SortUtil.swap(queue,1,size--); r@c!M|m@
fixDown(1); *pYawT
} qV)hCc/ ~
file://fixdown L>n^Q:M
private void fixDown(int k) { Rxq4Diq5k
int j; MP p
while ((j = k << 1) <= size) { 5Y>fVq{U?;
if (j < size %26amp;%26amp; queue[j] j++; tP89gN^PA|
if (queue[k]>queue[j]) file://不用交换 JYnyo$m/
break; `0`#Uf_/$
SortUtil.swap(queue,j,k); 7|k2~\@q
k = j; kvN<o-B
} Ch)E:Dvq6
} W/.n R[!
private void fixUp(int k) { z+c'-!e/
while (k > 1) { 63'L58O
int j = k >> 1; rX22%~1
if (queue[j]>queue[k]) [W99}bi$
break; d*$x|B|V
SortUtil.swap(queue,j,k); D7Y?$=0ycb
k = j; #n+sbx5~7
} b?/Su<q
} {KSy I#
OKA6S*
} f\;f&GI
Ky*xAx:
} 1[-RIN;U8
(`<B#D;
SortUtil： 7 6HB@'xY
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package org.rut.util.algorithm; +&*>FeJY
]''tuo2g8
import org.rut.util.algorithm.support.BubbleSort; UMH~Q`"
import org.rut.util.algorithm.support.HeapSort; u1|v3/Q-
import org.rut.util.algorithm.support.ImprovedMergeSort; W$` WkR
import org.rut.util.algorithm.support.ImprovedQuickSort; `F~Fb S
import org.rut.util.algorithm.support.InsertSort; U+uIuhz
import org.rut.util.algorithm.support.MergeSort; wKJK!P
import org.rut.util.algorithm.support.QuickSort; )5TX3#=;(G
import org.rut.util.algorithm.support.SelectionSort; 1?r$Rx<R
import org.rut.util.algorithm.support.ShellSort; }dSFv
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/** 7KtgR=-Lb
* @author treeroot &WdP=E"
* @since 2006-2-2 tAb3ejCo?
* @version 1.0 >Lz2zlZI
*/ Q8DKU
public class SortUtil { G+iJS!=
public final static int INSERT = 1; 5d|+c<
public final static int BUBBLE = 2; N]|U-fN\
public final static int SELECTION = 3; 'v@1_HHW\
public final static int SHELL = 4; K$M,d- `b
public final static int QUICK = 5; 5JZZvc$au
public final static int IMPROVED_QUICK = 6; JM*rPzp
public final static int MERGE = 7; 4;w#mzd
public final static int IMPROVED_MERGE = 8; s'@@q
public final static int HEAP = 9; U7G|4(
z<BwV /fH}
public static void sort(int[] data) { T f^O(
sort(data, IMPROVED_QUICK); F#{PJ#
} A3zNUad;
private static String[] name={ %$!EjyH9
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" ^[zF IO
}; OZh+x`' #
zdDJcdbGd1
private static Sort[] impl=new Sort[]{ J~G"D-l<9/
new InsertSort(), ZP%Bu2xd
new BubbleSort(), SiJX5ydz
new SelectionSort(), upH%-)%'
new ShellSort(), H %PIE1_
new QuickSort(), vGPaWYV
new ImprovedQuickSort(), n1c Q#u
new MergeSort(), ]9pcDZB
new ImprovedMergeSort(), AwL;-|X
new HeapSort() hO:X\:G
}; 'w7{8^Z2
k4%> F
public static String toString(int algorithm){ r,dxW5v.
return name[algorithm-1]; h-h}NCP
} %x7l`.)N
`24:Eg6r
public static void sort(int[] data, int algorithm) { Ljxn}):[
impl[algorithm-1].sort(data); &On0)G3Rc
} VVje|T^{Z
u]cnbm
public static interface Sort { W.,J'
public void sort(int[] data); y]\R0lR
} {1YT a:evl
@w:sNXz-
public static void swap(int[] data, int i, int j) { Xl*-A|:j
int temp = data; LGCL*Qbsg
data = data[j]; <FK7Rz:4T
data[j] = temp; Fk(0q/b
} c\4n7m,y
} z?"5="D